Dr. Alexander S. Koujelev Profile

Dr. Alexander S. Koujelev

Research Scientist at Canadian Space Agency

SPIE Involvement:

Author

Publications (35)

Proceedings Article | 11 June 2021 Open Access

QKD terminal for Canada’s Quantum Encryption and Science Satellite (QEYSSat)

H. Podmore, I. D'Souza, J. Cain, T. Jennewein, B. Higgins, Y. S. Lee, A. Koujelev, D. Hudson, A. McColgan

Proceedings Volume 11852, 118520H (2021) https://doi.org/10.1117/12.2599162

Read Abstract +

Honeywell Aerospace is implementing on behalf of the Canadian Space Agency the Quantum Encryption and Science Satellite (QEYSSat), a Canadian-owned and operated scientific and technology demonstration mission aimed at developing the next-generation of secure communications infrastructure backed by quantum physics. The mission management is led by the Canadian Space Agency and the science is led by the Institute for Quantum Computing at the University of Waterloo. Quantum key distribution (QKD) is a method for issuing, via single-photon transmission, verifiably-confidential encryption keys between two parties. This capability is a powerful tool for the transfer of sensitive data (e.g. financial transactions, health records, etc.), however current terrestrial QKD networks are limited to a few hundred kilometres in geographic reach between nodes. The QEYSSat mission will use a satellite receiver as a trusted node to demonstrate the distribution of secure keys between ground stations separated by at least 400 km. In addition, Honeywell intends to fly an optical intersatellite link (OISL) terminal as a hosted payload on this mission. The QEYSSat mission will utilize both weak coherent pulse (WCP) sources and entangled photon sources in an uplink configuration to study the performance of QKD, and to perform Bell tests of long-range quantum entanglement. Honeywell is building the QKD receiver terminal consisting of a front-end telescope, a precision pointing and tracking system and single-photon detectors. Major technical challenges include polarization management throughout the optical chain, accurate pointing and tracking, and suppression of background and stray light sources. To address these challenges, Honeywell is leveraging its existing commercial optical communications solutions to meet the more stringent performance requirements for space-based QKD. The QKD terminal architecture consists of an afocal front-end telescope, a wide FOV high-precision pointing and tracking assembly, a polarization analyzer and single-photon photodetector system. A large-diameter on-axis telescope for geostationary optical communications forms the basis for the terminal’s front-end optics, and Honeywell’s commercial Optical Pointing and Tracking Relay Assembly for intersatellite Communications (OPTRAC) has been adapted as a quantum-ready pointing and tracking unit (QTRAC). For each element, substantial effort has been made to develop an optical system that preserves single-photon states with high fidelity despite the large number of optical surfaces in the chain. The optical assembly for the QKD terminal was developed and tested at the breadboard level in 2020; this paper will highlight the development and testing of these units as well as the overall architecture and concept of the QEYSSat mission.

DOWNLOAD PAPER

SPIE Journal Paper | 16 March 2018 Open Access

In-flight performance of the Canadian Astro-H Metrology System

Luigi C. Gallo, Alexander Koujelev, Stéphane Gagnon, Timothy Elgin, Martin Guibert, Ryo Iizuka, Manabu Ishida, Kosei Ishimura, Naoko Iwata, Taro Kawano, Casey Lambert, Franco Moroso, Shiro Ueno, Takayuki Yuasa

JATIS, Vol. 4, Issue 02, 021405, (March 2018) https://doi.org/10.1117/12.10.1117/1.JATIS.4.2.021405

KEYWORDS: Content addressable memory, Metrology, Sensors, Space telescopes, Photons, Calibration, Space operations, Satellites, Telescopes, X-ray telescopes

Read Abstract +

DOWNLOAD PAPER

SPIE Journal Paper | 13 March 2018 Open Access

Hitomi (ASTRO-H) X-ray Astronomy Satellite

Tadayuki Takahashi, Motohide Kokubun, Kazuhisa Mitsuda, Richard Kelley, Takaya Ohashi, Felix Aharonian, Hiroki Akamatsu, Fumie Akimoto, Steven Allen, Naohisa Anabuki, Lorella Angelini, Keith Arnaud, Makoto Asai, Marc Audard, Hisamitsu Awaki, Magnus Axelsson, Philipp Azzarello, Chris Baluta, Aya Bamba, Nobutaka Bando, Marshall Bautz, Thomas Bialas, Roger Blandford, Kevin Boyce, Laura Brenneman, Gregory Brown, Esra Bulbul, Edward Cackett, Edgar Canavan, Maria Chernyakova, Meng Chiao, Paolo Coppi, Elisa Costantini, Stephen O’ Dell, Michael DiPirro, Chris Done, Tadayasu Dotani, John Doty, Ken Ebisawa, Megan E. Eckart, Teruaki Enoto, Yuichiro Ezoe, Andrew Fabian, Carlo Ferrigno, Adam Foster, Ryuichi Fujimoto, Yasushi Fukazawa, Stefan Funk, Akihiro Furuzawa, Massimiliano Galeazzi, Luigi Gallo, Poshak Gandhi, Kirk Gilmore, Margherita Giustini, Andrea Goldwurm, Liyi Gu, Matteo Guainazzi, Daniel Haas, Yoshito Haba, Kouichi Hagino, Kenji Hamaguchi, Ilana Harrus, Isamu Hatsukade, Takayuki Hayashi, Katsuhiro Hayashi, Kiyoshi Hayashida, Jan-Willem den Herder, Junko Hiraga, Kazuyuki Hirose, Ann Hornschemeier, Akio Hoshino, John Hughes, Yuto Ichinohe, Ryo Iizuka, Hajime Inoue, Yoshiyuki Inoue, Kazunori Ishibashi, Manabu Ishida, Kumi Ishikawa, Kosei Ishimura, Yoshitaka Ishisaki, Masayuki Itoh, Masachika Iwai, Naoko Iwata, Naoko Iyomoto, Christopher Jewell, Jelle Kaastra, Timothy Kallman, Tsuneyoshi Kamae, Erin Kara, Jun Kataoka, Satoru Katsuda, Junichiro Katsuta, Madoka Kawaharada, Nobuyuki Kawai, Taro Kawano, Shigeo Kawasaki, Dmitry Khangulyan, Caroline Kilbourne, Mark Kimball, Ashley King, Takao Kitaguchi, Shunji Kitamoto, Tetsu Kitayama, Takayoshi Kohmura, Saori Konami, Tatsuro Kosaka, Alexander Koujelev, Katsuji Koyama, Shu Koyama, Peter Kretschmar, Hans Krimm, Aya Kubota, Hideyo Kunieda, Philippe Laurent, Shiu-Hang Lee, Maurice Leutenegger, Olivier Limousin, Michael Loewenstein, Knox Long, David Lumb, Grzegorz Madejski, Yoshitomo Maeda, Daniel Maier, Kazuo Makishima, Maxim Markevitch, Candace Masters, Hironori Matsumoto, Kyoko Matsushita, Daniel McCammon, Daniel McGuinness, Brian McNamara, Missagh Mehdipour, Joseph Miko, Eric Miller, Jon Miller, Shin Mineshige, Kenji Minesugi, Ikuyuki Mitsuishi, Takuya Miyazawa, Tsunefumi Mizuno, Hideyuki Mori, Koji Mori, Franco Moroso, Samuel Moseley, Theodore Muench, Koji Mukai, Hiroshi Murakami, Toshio Murakami, Richard Mushotzky, Hosei Nagano, Ryo Nagino, Takao Nakagawa, Hiroshi Nakajima, Takeshi Nakamori, Toshio Nakano, Shinya Nakashima, Kazuhiro Nakazawa, Yoshiharu Namba, Chikara Natsukari, Yusuke Nishioka, Kumiko Nobukawa, Masayoshi Nobukawa, Hirofumi Noda, Masaharu Nomachi, Hirokazu Odaka, Hiroyuki Ogawa, Mina Ogawa, Keiji Ogi, Masanori Ohno, Masayuki Ohta, Takashi Okajima, Atsushi Okamoto, Tsuyoshi Okazaki, Naomi Ota, Masanobu Ozaki, Frederik B. Paerels, Stéphane Paltani, Arvind Parmar, Robert Petre, Ciro Pinto, Jelle de Plaa, Martin Pohl, James Pontius, Frederick Porter, Katja Pottschmidt, Brian Ramsey, Christopher Reynolds, Helen Russell, Samar Safi-Harb, Shinya Saito, Kazuhiro Sakai, Shin-ichiro Sakai, Hiroaki Sameshima, Toru Sasaki, Goro Sato, Kosuke Sato, Rie Sato, Yoichi Sato, Makoto Sawada, Norbert Schartel, Peter Serlemitsos, Hiromi Seta, Yasuko Shibano, Maki Shida, Megumi Shidatsu, Takanobu Shimada, Keisuke Shinozaki, Peter Shirron, Aurora Simionescu, Cynthia Simmons, Randall Smith, Gary Sneiderman, Yang Soong, Łukasz Stawarz, Yasuharu Sugawara, Satoshi Sugita, Hiroyuki Sugita, Andrew Szymkowiak, Hiroyasu Tajima, Hiromitsu Takahashi, Shin'ichiro Takeda, Yoh Takei, Toru Tamagawa, Takayuki Tamura, Keisuke Tamura, Takaaki Tanaka, Yasuo Tanaka, Yasuyuki Tanaka, Makoto Tashiro, Yuzuru Tawara, Yukikatsu Terada, Yuichi Terashima, Francesco Tombesi, Hiroshi Tomida, Yohko Tsuboi, Masahiro Tsujimoto, Hiroshi Tsunemi, Takeshi Go Tsuru, Hiroyuki Uchida, Hideki Uchiyama, Yasunobu Uchiyama, Shutaro Ueda, Yoshihiro Ueda, Shiro Ueno, Shin’ichiro Uno, C. Megan Urry, Eugenio Ursino, Cor de Vries, Atsushi Wada, Shin Watanabe, Tomomi Watanabe, Norbert Werner, Daniel R. Wik, Dan R. Wilkins, Brian J. Williams, Shinya Yamada, Takahiro Yamada, Hiroya Yamaguchi, Kazutaka Yamaoka, Noriko Y. Yamasaki, Makoto Yamauchi, Shigeo Yamauchi, Tahir Yaqoob, Yoichi Yatsu, Daisuke Yonetoku, Atsumasa Yoshida, Takayuki Yuasa, Irina Zhuravleva, Abderahmen Zoghbi

JATIS, Vol. 4, Issue 02, 021402, (March 2018) https://doi.org/10.1117/12.10.1117/1.JATIS.4.2.021402

KEYWORDS: Sensors, X-ray astronomy, Satellites, Physics, X-rays, Space operations, Aerospace engineering, Astronomy, Space telescopes, X-ray telescopes

Read Abstract +

DOWNLOAD PAPER

Proceedings Article | 20 July 2016 Paper

The ASTRO-H (Hitomi) x-ray astronomy satellite

Tadayuki Takahashi, Motohide Kokubun, Kazuhisa Mitsuda, Richard Kelley, Takaya Ohashi, Felix Aharonian, Hiroki Akamatsu, Fumie Akimoto, Steve Allen, Naohisa Anabuki, Lorella Angelini, Keith Arnaud, Makoto Asai, Marc Audard, Hisamitsu Awaki, Magnus Axelsson, Philipp Azzarello, Chris Baluta, Aya Bamba, Nobutaka Bando, Marshall Bautz, Thomas Bialas, Roger Blandford, Kevin Boyce, Laura Brenneman, Greg Brown, Esra Bulbul, Edward Cackett, Edgar Canavan, Maria Chernyakova, Meng Chiao, Paolo Coppi, Elisa Costantini, Jelle de Plaa, Jan-Willem den Herder, Michael DiPirro, Chris Done, Tadayasu Dotani, John Doty, Ken Ebisawa, Megan Eckart, Teruaki Enoto, Yuichiro Ezoe, Andrew Fabian, Carlo Ferrigno, Adam Foster, Ryuichi Fujimoto, Yasushi Fukazawa, Akihiro Furuzawa, Massimiliano Galeazzi, Luigi Gallo, Poshak Gandhi, Kirk Gilmore, Margherita Giustini, Andrea Goldwurm, Liyi Gu, Matteo Guainazzi, Daniel Haas, Yoshito Haba, Kouichi Hagino, Kenji Hamaguchi, Atsushi Harayama, Ilana Harrus, Isamu Hatsukade, Takayuki Hayashi, Katsuhiro Hayashi, Kiyoshi Hayashida, Junko Hiraga, Kazuyuki Hirose, Ann Hornschemeier, Akio Hoshino, John Hughes, Yuto Ichinohe, Ryo Iizuka, Yoshiyuki Inoue, Hajime Inoue, Kazunori Ishibashi, Manabu Ishida, Kumi Ishikawa, Kosei Ishimura, Yoshitaka Ishisaki, Masayuki Itoh, Naoko Iwata, Naoko Iyomoto, Chris Jewell, Jelle Kaastra, Timothy Kallman, Tuneyoshi Kamae, Erin Kara, Jun Kataoka, Satoru Katsuda, Junichiro Katsuta, Madoka Kawaharada, Nobuyuki Kawai, Taro Kawano, Shigeo Kawasaki, Dmitry Khangulyan, Caroline Kilbourne, Mark Kimball, Ashley King, Takao Kitaguchi, Shunji Kitamoto, Tetsu Kitayama, Takayoshi Kohmura, Tatsuro Kosaka, Alex Koujelev, Katsuji Koyama, Shu Koyama, Peter Kretschmar, Hans Krimm, Aya Kubota, Hideyo Kunieda, Philippe Laurent, François Lebrun, Shiu-Huang Lee, Maurice Leutenegger, Olivier Limousin, Michael Loewenstein, Knox Long, David Lumb, Grzegorz Madejski, Yoshitomo Maeda, Daniel Maier, Kazuo Makishima, Maxim Markevitch, Candace Masters, Hironori Matsumoto, Kyoko Matsushita, Dan McCammon, Daniel McGuinness, Brian McNamara, Missagh Mehdipour, Joseph Miko, Jon Miller, Eric Miller, Shin Mineshige, Kenji Minesugi, Ikuyuki Mitsuishi, Takuya Miyazawa, Tsunefumi Mizuno, Koji Mori, Hideyuki Mori, Franco Moroso, Harvey Moseley, Theodore Muench, Koji Mukai, Hiroshi Murakami, Toshio Murakami, Richard Mushotzky, Housei Nagano, Ryo Nagino, Takao Nakagawa, Hiroshi Nakajima, Takeshi Nakamori, Toshio Nakano, Shinya Nakashima, Kazuhiro Nakazawa, Yoshiharu Namba, Chikara Natsukari, Yusuke Nishioka, Masayoshi Nobukawa, Kumiko Nobukawa, Hirofumi Noda, Masaharu Nomachi, Steve O'Dell, Hirokazu Odaka, Hiroyuki Ogawa, Mina Ogawa, Keiji Ogi, Masanori Ohno, Masayuki Ohta, Takashi Okajima, Atsushi Okamoto, Tsuyoshi Okazaki, Naomi Ota, Masanobu Ozaki, Frederik Paerels, Stéphane Paltani, Arvind Parmar, Robert Petre, Ciro Pinto, Martin Pohl, James Pontius, F. Scott Porter, Katja Pottschmidt, Brian Ramsey, Christopher Reynolds, Helen Russell, Samar Safi-Harb, Shinya Saito, Shin-ichiro Sakai, Kazuhiro Sakai, Hiroaki Sameshima, Toru Sasaki, Goro Sato, Yoichi Sato, Kosuke Sato, Rie Sato, Makoto Sawada, Norbert Schartel, Peter Serlemitsos, Hiromi Seta, Yasuko Shibano, Maki Shida, Megumi Shidatsu, Takanobu Shimada, Keisuke Shinozaki, Peter Shirron, Aurora Simionescu, Cynthia Simmons, Randall Smith, Gary Sneiderman, Yang Soong, Łukasz Stawarz, Yasuharu Sugawara, Hiroyuki Sugita, Satoshi Sugita, Andrew Szymkowiak, Hiroyasu Tajima, Hiromitsu Takahashi, Shin'ichiro Takeda, Yoh Takei, Toru Tamagawa, Takayuki Tamura, Keisuke Tamura, Takaaki Tanaka, Yasuo Tanaka, Yasuyuki Tanaka, Makoto Tashiro, Yuzuru Tawara, Yukikatsu Terada, Yuichi Terashima, Francesco Tombesi, Hiroshi Tomida, Yohko Tsuboi, Masahiro Tsujimoto, Hiroshi Tsunemi, Takeshi Tsuru, Hiroyuki Uchida, Yasunobu Uchiyama, Hideki Uchiyama, Yoshihiro Ueda, Shutaro Ueda, Shiro Ueno, Shin'ichiro Uno, Meg Urry, Eugenio Ursino, Cor de Vries, Atsushi Wada, Shin Watanabe, Tomomi Watanabe, Norbert Werner, Daniel Wik, Dan Wilkins, Brian Williams, Takahiro Yamada, Shinya Yamada, Hiroya Yamaguchi, Kazutaka Yamaoka, Noriko Yamasaki, Makoto Yamauchi, Shigeo Yamauchi, Tahir Yaqoob, Yoichi Yatsu, Daisuke Yonetoku, Atsumasa Yoshida, Takayuki Yuasa, Irina Zhuravleva, Abderahmen Zoghbi

Proceedings Volume 9905, 99050U (2016) https://doi.org/10.1117/12.2232379

KEYWORDS: X-rays, X-ray astronomy, Sensors, Satellites, X-ray telescopes, Space operations, Physics, Space telescopes, Aerospace engineering, Calibration

Read Abstract +

Proceedings Article | 24 July 2014 Paper

The ASTRO-H X-ray astronomy satellite

Tadayuki Takahashi, Kazuhisa Mitsuda, Richard Kelley, Felix Aharonian, Hiroki Akamatsu, Fumie Akimoto, Steve Allen, Naohisa Anabuki, Lorella Angelini, Keith Arnaud, Makoto Asai, Marc Audard, Hisamitsu Awaki, Philipp Azzarello, Chris Baluta, Aya Bamba, Nobutaka Bando, Marshall Bautz, Thomas Bialas, Roger Blandford, Kevin Boyce, Laura Brenneman, Gregory Brown, Ed Cackett, Edgar Canavan, Maria Chernyakova, Meng Chiao, Paolo Coppi, Elisa Costantini, Jelle de Plaa, Jan-Willem den Herder, Michael DiPirro, Chris Done, Tadayasu Dotani, John Doty, Ken Ebisawa, Teruaki Enoto, Yuichiro Ezoe, Andrew Fabian, Carlo Ferrigno, Adam Foster, Ryuichi Fujimoto, Yasushi Fukazawa, Stefan Funk, Akihiro Furuzawa, Massimiliano Galeazzi, Luigi Gallo, Poshak Gandhi, Kirk Gilmore, Matteo Guainazzi, Daniel Haas, Yoshito Haba, Kenji Hamaguchi, Atsushi Harayama, Isamu Hatsukade, Katsuhiro Hayashi, Takayuki Hayashi, Kiyoshi Hayashida, Junko Hiraga, Kazuyuki Hirose, Ann Hornschemeier, Akio Hoshino, John Hughes, Una Hwang, Ryo Iizuka, Yoshiyuki Inoue, Kazunori Ishibashi, Manabu Ishida, Kumi Ishikawa, Kosei Ishimura, Yoshitaka Ishisaki, Masayuki Itoh, Naoko Iwata, Naoko Iyomoto, Chris Jewell, Jelle Kaastra, Timothy Kallman, Tuneyoshi Kamae, Jun Kataoka, Satoru Katsuda, Junichiro Katsuta, Madoka Kawaharada, Nobuyuki Kawai, Taro Kawano, Shigeo Kawasaki, Dmitry Khangaluyan, Caroline Kilbourne, Mark Kimball, Masashi Kimura, Shunji Kitamoto, Tetsu Kitayama, Takayoshi Kohmura, Motohide Kokubun, Saori Konami, Tatsuro Kosaka, Alexander Koujelev, Katsuji Koyama, Hans Krimm, Aya Kubota, Hideyo Kunieda, Stephanie LaMassa, Philippe Laurent, François Lebrun, Maurice Leutenegger, Olivier Limousin, Michael Loewenstein, Knox Long, David Lumb, Grzegorz Madejski, Yoshitomo Maeda, Kazuo Makishima, Maxim Markevitch, Candace Masters, Hironori Matsumoto, Kyoko Matsushita, Dan McCammon, Daniel McGuinness, Brian McNamara, Joseph Miko, Jon Miller, Eric Miller, Shin Mineshige, Kenji Minesugi, Ikuyuki Mitsuishi, Takuya Miyazawa, Tsunefumi Mizuno, Koji Mori, Hideyuki Mori, Franco Moroso, Theodore Muench, Koji Mukai, Hiroshi Murakami, Toshio Murakami, Richard Mushotzky, Housei Nagano, Ryo Nagino, Takao Nakagawa, Hiroshi Nakajima, Takeshi Nakamori, Shinya Nakashima, Kazuhiro Nakazawa, Yoshiharu Namba, Chikara Natsukari, Yusuke Nishioka, Masayoshi Nobukawa, Hirofumi Noda, Masaharu Nomachi, Steve O'Dell, Hirokazu Odaka, Hiroyuki Ogawa, Mina Ogawa, Keiji Ogi, Takaya Ohashi, Masanori Ohno, Masayuki Ohta, Takashi Okajima, Tsuyoshi Okazaki, Naomi Ota, Masanobu Ozaki, Frits Paerels, Stéphane Paltani, Arvind Parmar, Robert Petre, Ciro Pinto, Martin Pohl, James Pontius, F. Porter, Katja Pottschmidt, Brian Ramsey, Rubens Reis, Christopher Reynolds, Claudio Ricci, Helena Russell, Samar Safi-Harb, Shinya Saito, Shin-ichiro Sakai, Hiroaki Sameshima, Kosuke Sato, Rie Sato, Goro Sato, Makoto Sawada, Peter Serlemitsos, Hiromi Seta, Yasuko Shibano, Maki Shida, Takanobu Shimada, Peter Shirron, Aurora Simionescu, Cynthia Simmons, Randall Smith, Gary Sneiderman, Yang Soong, Lukasz Stawarz, Yasuharu Sugawara, Satoshi Sugita, Andrew Szymkowiak, Hiroyasu Tajima, Hiroaki Takahashi, Hiromitsu Takahashi, Shin-ichiro Takeda, Yoh Takei, Toru Tamagawa, Keisuke Tamura, Takayuki Tamura, Takaaki Tanaka, Yasuyuki Tanaka, Yasuo Tanaka, Makoto Tashiro, Yuzuru Tawara, Yukikatsu Terada, Yuichi Terashima, Francesco Tombesi, Hiroshi Tomida, Yoko Tsuboi, Masahiro Tsujimoto, Hiroshi Tsunemi, Takeshi Tsuru, Hiroyuki Uchida, Hideki Uchiyama, Yasunobu Uchiyama, Yoshihiro Ueda, Shutaro Ueda, Shiro Ueno, Shinichiro Uno, Meg Urry, Eugenio Ursino, Cor de Vries, Atsushi Wada, Shin Watanabe, Tomomi Watanabe, Norbert Werner, Nicholas White, Dan Wilkins, Shinya Yamada, Takahiro Yamada, Hiroya Yamaguchi, Kazutaka Yamaoka, Noriko Yamasaki, Makoto Yamauchi, Shigeo Yamauchi, Tahir Yaqoob, Yoichi Yatsu, Daisuke Yonetoku, Atsumasa Yoshida, Takayuki Yuasa, Irina Zhuravleva, Abderahmen Zoghbi, John ZuHone

Proceedings Volume 9144, 914425 (2014) https://doi.org/10.1117/12.2055681

KEYWORDS: Sensors, X-rays, Hard x-rays, X-ray telescopes, X-ray astronomy, Physics, Space telescopes, Satellites, Astronomy, Spectroscopy

Read Abstract +

Proceedings Article | 24 July 2014 Paper

The Canadian Astro-H Metrology System

Luigi Gallo, Casey Lambert, Alex Koujelev, Stephane Gagnon, Martin Guibert

Proceedings Volume 9144, 914456 (2014) https://doi.org/10.1117/12.2054921

KEYWORDS: Content addressable memory, Space telescopes, X-ray telescopes, Sensors, Metrology, Device simulation, Hard x-rays, X-rays, Calibration, Optical benches

Read Abstract +

Proceedings Article | 17 September 2012 Paper

The Canadian Astro-H metrology system

Luigi Gallo, Casey Lambert, Alex Koujelev, Denis Laurin, Stephane Gagnon, Martin Guibert

Proceedings Volume 8443, 844354 (2012) https://doi.org/10.1117/12.926371

KEYWORDS: Content addressable memory, X-ray telescopes, Sensors, Space telescopes, Metrology, Hard x-rays, X-rays, Optical benches, Laser metrology, Optical alignment

Read Abstract +

Proceedings Article | 17 September 2012 Paper

The ASTRO-H X-ray Observatory

Tadayuki Takahashi, Kazuhisa Mitsuda, Richard Kelley, Henri Aarts, Felix Aharonian, Hiroki Akamatsu, Fumie Akimoto, Steve Allen, Naohisa Anabuki, Lorella Angelini, Keith Arnaud, Makoto Asai, Marc Audard, Hisamitsu Awaki, Philipp Azzarello, Chris Baluta, Aya Bamba, Nobutaka Bando, Mark Bautz, Roger Blandford, Kevin Boyce, Greg Brown, Ed Cackett, Mara Chernyakova, Paolo Coppi, Elisa Costantini, Jelle de Plaa, Jan-Willem den Herder, Michael DiPirro, Chris Done, Tadayasu Dotani, John Doty, Ken Ebisawa, Megan Eckart, Teruaki Enoto, Yuichiro Ezoe, Andrew Fabian, Carlo Ferrigno, Adam Foster, Ryuichi Fujimoto, Yasushi Fukazawa, Stefan Funk, Akihiro Furuzawa, Massimiliano Galeazzi, Luigi Gallo, Poshak Gandhi, Keith Gendreau, Kirk Gilmore, Daniel Haas, Yoshito Haba, Kenji Hamaguchi, Isamu Hatsukade, Takayuki Hayashi, Kiyoshi Hayashida, Junko Hiraga, Kazuyuki Hirose, Ann Hornschemeier, Akio Hoshino, John Hughes, Una Hwang, Ryo Iizuka, Yoshiyuki Inoue, Kazunori Ishibashi, Manabu Ishida, Kosei Ishimura, Yoshitaka Ishisaki, Masayuki Ito, Naoko Iwata, Naoko Iyomoto, Jelle Kaastra, Timothy Kallman, Tuneyoshi Kamae, Jun Kataoka, Satoru Katsuda, Hajime Kawahara, Madoka Kawaharada, Nobuyuki Kawai, Shigeo Kawasaki, Dmitry Khangaluyan, Caroline Kilbourne, Masashi Kimura, Kenzo Kinugasa, Shunji Kitamoto, Tetsu Kitayama, Takayoshi Kohmura, Motohide Kokubun, Tatsuro Kosaka, Alex Koujelev, Katsuji Koyama, Hans Krimm, Aya Kubota, Hideyo Kunieda, Stephanie LaMassa, Philippe Laurent, Francois Lebrun, Maurice Leutenegger, Olivier Limousin, Michael Loewenstein, Knox Long, David Lumb, Grzegorz Madejski, Yoshitomo Maeda, Kazuo Makishima, Genevieve Marchand, Maxim Markevitch, Hironori Matsumoto, Kyoko Matsushita, Dan McCammon, Brian McNamara, Jon Miller, Eric Miller, Shin Mineshige, Kenji Minesugi, Ikuyuki Mitsuishi, Takuya Miyazawa, Tsunefumi Mizuno, Hideyuki Mori, Koji Mori, Koji Mukai, Toshio Murakami, Hiroshi Murakami, Richard Mushotzky, Hosei Nagano, Ryo Nagino, Takao Nakagawa, Hiroshi Nakajima, Takeshi Nakamori, Kazuhiro Nakazawa, Yoshiharu Namba, Chikara Natsukari, Yusuke Nishioka, Masayoshi Nobukawa, Masaharu Nomachi, Steve O'Dell, Hirokazu Odaka, Hiroyuki Ogawa, Mina Ogawa, Keiji Ogi, Takaya Ohashi, Masanori Ohno, Masayuki Ohta, Takashi Okajima, Atsushi Okamoto, Tsuyoshi Okazaki, Naomi Ota, Masanobu Ozaki, Fritzs Paerels, Stéphane Paltani, Arvind Parmar, Robert Petre, Martin Pohl, F. Scott Porter, Brian Ramsey, Rubens Reis, Christopher Reynolds, Helen Russell, Samar Safi-Harb, Shin-ichiro Sakai, Hiroaki Sameshima, Jeremy Sanders, Goro Sato, Rie Sato, Yohichi Sato, Kosuke Sato, Makoto Sawada, Peter Serlemitsos, Hiromi Seta, Yasuko Shibano, Maki Shida, Takanobu Shimada, Keisuke Shinozaki, Peter Shirron, Aurora Simionescu, Cynthia Simmons, Randall Smith, Gary Sneiderman, Yang Soong, Lukasz Stawarz, Yasuharu Sugawara, Hiroyuki Sugita, Satoshi Sugita, Andrew Szymkowiak, Hiroyasu Tajima, Hiromitsu Takahashi, Shin-ichiro Takeda, Yoh Takei, Toru Tamagawa, Takayuki Tamura, Keisuke Tamura, Takaaki Tanaka, Yasuo Tanaka, Makoto Tashiro, Yuzuru Tawara, Yukikatsu Terada, Yuichi Terashima, Francesco Tombesi, Hiroshi Tomida, Yohko Tsuboi, Masahiro Tsujimoto, Hiroshi Tsunemi, Takeshi Tsuru, Hiroyuki Uchida, Yasunobu Uchiyama, Hideki Uchiyama, Yoshihiro Ueda, Shiro Ueno, Shinichiro Uno, Meg Urry, Eugenio Ursino, Cor de Vries, Atsushi Wada, Shin Watanabe, Norbert Werner, Nicholas White, Takahiro Yamada, Shinya Yamada, Hiroya Yamaguchi, Noriko Yamasaki, Shigeo Yamauchi, Makoto Yamauchi, Yoichi Yatsu, Daisuke Yonetoku, Atsumasa Yoshida, Takayuki Yuasa

Proceedings Volume 8443, 84431Z (2012) https://doi.org/10.1117/12.926190

KEYWORDS: Sensors, X-rays, Hard x-rays, X-ray telescopes, Physics, X-ray astronomy, Iron, Spectroscopy, X-ray imaging, Galaxy groups and clusters

Read Abstract +

Proceedings Article | 26 February 2010 Paper

Free-space gigabit laser link experiment incorporating Japanese and Canadian technology development

Alexander Koujelev, Daniel Gratton, Louis Hotte, Yoshinori Arimoto

Proceedings Volume 7587, 758707 (2010) https://doi.org/10.1117/12.840420

KEYWORDS: Nonlinear optics, Free space optics, Spatial light modulators, Telescopes, Mirrors, Modulation, Optical tracking, Optical amplifiers, Free space optical communications, Control systems

Read Abstract +

SPIE Journal Paper | 1 August 2008 Open Access

Optical beam tracking and distortion compensation based on a nonlinear lens mechanism

Alexander Koujelev, Alexander Dudelzak

OE, Vol. 47, Issue 08, 085003, (August 2008) https://doi.org/10.1117/12.10.1117/1.2968236

KEYWORDS: Nonlinear optics, Optical tracking, Distortion, Refractive index, Adaptive optics, Modulation, Optical engineering, Free space optics, Free space optical communications, Liquid crystals

Read Abstract +

DOWNLOAD PAPER

Proceedings Article | 26 September 2007 Paper

Modeling spaceborne lidar returns from vegetation canopies

B. Hu, I. Tcherniavski, A. Dudelzak, A. Koujelev

Proceedings Volume 6681, 66810G (2007) https://doi.org/10.1117/12.734359

KEYWORDS: LIDAR, Vegetation, 3D modeling, Solar radiation models, Instrument modeling, Transmittance, Atmospheric propagation, Optical filters, Sensors, Signal to noise ratio

Read Abstract +

Proceedings Article | 25 September 2007 Paper

Optical beam tracking based on nonlinear lens mechanism

Alexander Koujelev, Alexander Dudelzak

Proceedings Volume 6708, 67080V (2007) https://doi.org/10.1117/12.734343

KEYWORDS: Nonlinear optics, Refractive index, Optical tracking, Free space optics, Modulation, Free space optical communications, Liquid crystals, Diffraction, Polarization

Read Abstract +

SPIE Journal Paper | 1 February 2007

Double phase conjugation in a liquid crystal at 1.5 μm for optical beam tracking

Alexander Koujelev, Alexander Dudelzak

OE, Vol. 46, Issue 02, 024001, (February 2007) https://doi.org/10.1117/12.10.1117/1.2437783

KEYWORDS: Phase conjugation, Absorption, Liquid crystals, Mirrors, Optical tracking, Diffraction gratings, Diffraction, Scattering, Optical engineering, Laser scattering

Read Abstract +

Proceedings Article | 2 October 2006 Paper

Nonlinear optical tracking for high-speed free-space communications

Alexander Dudelzak, Alexander Koujelev

Proceedings Volume 6390, 63900F (2006) https://doi.org/10.1117/12.690600

KEYWORDS: Optical tracking, Sensors, Free space optics, Telescopes, Free space optical communications, Space telescopes, Optical communications, Data communications, Complex systems, Electro optics

Read Abstract +

Proceedings Article | 1 September 2006 Paper

Three-stage tracking approach in development of a free-space laser communicator

Alexander Koujelev, Alexander Dudelzak

Proceedings Volume 6304, 63041Q (2006) https://doi.org/10.1117/12.680629

KEYWORDS: Optical tracking, Sensors, Telescopes, Telecommunications, Mirrors, Free space optics, Nonlinear optics, Free space optical communications, Electro optics, Laser communications

Read Abstract +

Proceedings Article | 18 April 2005 Paper

High bitrate free-space communicator using automatic nonlinear all-optical beam tracking

Alexander Dudelzak, Alexander Kuzhelev, Daniel Gratton, Louis Hotte, Yoshinori Arimoto

Proceedings Volume 5712, (2005) https://doi.org/10.1117/12.593779

KEYWORDS: Optical tracking, Mirrors, Telecommunications, Sensors, Free space optics, Ocean optics, Automatic tracking, Interfaces, Fiber couplers, Receivers

Read Abstract +

Proceedings Article | 20 December 2004 Paper

Optical communications between moving transceivers using double phase-conjugation beam tracking

Alexander Kuzhelev, Alexander Dudelzak, Michael Maszkiewicz, Daniel Gratton, Louis Hotte

Proceedings Volume 5577, (2004) https://doi.org/10.1117/12.567503

KEYWORDS: Optical tracking, Absorption, Phase conjugation, Mirrors, Telecommunications, Free space optics, Liquid crystals, Interfaces, Modulation, Diffraction

Read Abstract +

Proceedings Article | 5 January 2004 Paper

Thermal holographic gratings with orientational enhancement in a liquid crystal cell at 1500 nm

Alexander Kuzhelev, Alexander Dudelzak, Michael Maszkiewicz

Proceedings Volume 5213, (2004) https://doi.org/10.1117/12.505916

KEYWORDS: Diffraction, Diffraction gratings, Absorption, Liquid crystals, Holography, Coating, Infrared radiation, Liquids, Telecommunications, Modulation

Read Abstract +

Proceedings Article | 8 December 2003 Paper

Nanostructured self-organized supramolecular Si-containing polymeric composites for photorefraction in the near infrared

Alexander Kuzhelev, Alexander Dudelzak, Michael Maszkiewicz, William Douglas, Wenqing Peng, Larisa Klapshina, Vladimir Semenov

Proceedings Volume 5216, (2003) https://doi.org/10.1117/12.505848

KEYWORDS: Composites, Polymers, Diffraction gratings, Diffraction, Infrared radiation, Photorefraction, Chromophores, Visible radiation, Laser beam diagnostics, Silicon

Read Abstract +

Proceedings Article | 29 April 2003 Paper

Novel organometallic nanomaterials exhibiting high nonlinearities including photorefraction at telecommunication wavelengths

William Douglas, Larisa Klapshina, Alexander Kuzhelev, Andrey Afanas’ev, Vladimir Semenov, Georgy Domrachev

Proceedings Volume 5118, (2003) https://doi.org/10.1117/12.498628

KEYWORDS: Polymers, Silicon, Transmission electron microscopy, Absorption, Photomicroscopy, Photorefraction, Telecommunications, Nanomaterials, Near infrared, Chromium

Read Abstract +

Proceedings Article | 24 July 2002 Paper

New materials for nonlinear optics

William Douglas, Larisa Klapshina, Vladimir Semenov, George Domrachev, Zhanna Fominikh, Oleg Antipov, Andrey Afanas'ev, Alexander Kuzhelev, Andrey Zinoviev, Anatoly Rubinov, Boris Bushuk, Sergey Bushuk, Richard Jones, Robert Benfield, Alkay Mustafa

Proceedings Volume 4751, (2002) https://doi.org/10.1117/12.475912

KEYWORDS: Polymers, Nonlinear optics, Polymer thin films, Polarization, Refractive index, Silicon, Absorption, Picosecond phenomena, Molecules, Photodetectors

Read Abstract +

Proceedings Article | 13 June 2002 Paper

New photorefractive polymer composities highly sensitive at 1500 nm

Alexander Kuzhelev, Alexander Dudelzak, Pierre-Paul Proulx, William Douglas, Larisa Klapshina, Tatyana Lopatina

Proceedings Volume 4642, (2002) https://doi.org/10.1117/12.470457

KEYWORDS: Polymers, Composites, Electro optics, Modulation, Laser beam diagnostics, Absorption, Chromophores, Diffraction, Anisotropy, Refractive index

Read Abstract +

Proceedings Article | 23 March 2001 Paper

200-W-average-power Nd:YAG laser with self-adaptive cavity completed by dynamic refractive-index gratings

Oleg Antipov, Alexander Kuzhelev, Dmitry Chausov, Andrey Zinoviev

Proceedings Volume 4350, (2001) https://doi.org/10.1117/12.420956

KEYWORDS: Nd:YAG lasers, Polarization, Mirrors, Amplifiers, Laser crystals, Oscillators, Optical amplifiers, Holography, Refractive index, Crystals

Read Abstract +

Proceedings Article | 2 March 2001 Paper

Photorefractive effects in novel polymer nanocomposites

Alexander Kuzhelev, I. Yurasova, Oleg Antipov, William Douglas, Larisa Klapshina, Vladimir Semenov, George Domrachev, Tatyana Lopatina

Proceedings Volume 4353, (2001) https://doi.org/10.1117/12.417717

KEYWORDS: Polymers, Chromophores, Composites, Refractive index, Diffraction gratings, Photorefraction, Nanocomposites, Fullerenes, Nonlinear optics, Four wave mixing

Read Abstract +

Proceedings Article | 29 November 2000 Paper

Thin film Z-scan measurements of the nonlinear response of novel conjugated silicon-ethynylene polymers and metal-containing complexes incorporated into polymeric matrices

William Douglas, Larisa Klapshina, Anatoly Rubinov, George Domrachev, Boris Bushuk, Oleg Antipov, Vladimir Semenov, Alexander Kuzhelev, Sergey Bushuk, Julia Kalvinkovskaya

Proceedings Volume 4106, (2000) https://doi.org/10.1117/12.408525

KEYWORDS: Polymers, Silicon, Silicon films, Neodymium, Chromium, Thin films, Cobalt, Refractive index, Polymer thin films, Matrices

Read Abstract +

Proceedings Article | 22 November 2000 Paper

High-average-power solid state lasers with a self-adaptive cavity based on a nonlinear mirror

Oleg Antipov, Alexander Kuzhelev, Dmitry Chausov, Alexander Zinoviev, V. Vorob'ev

Proceedings Volume 4338, (2000) https://doi.org/10.1117/12.407696

Read Abstract +

Proceedings Article | 12 May 2000 Paper

Self-starting 100-W-average-power laser with a self-adaptive cavity

Oleg Antipov, Alexander Kuzhelev, Dmitry Chausov, Andrey Zinoviev, Oleg Eremeykin, Alexander Fedin, Andrey Gavrilov, Sergey Smetanin

Proceedings Volume 3930, (2000) https://doi.org/10.1117/12.385394

KEYWORDS: Nd:YAG lasers, Oscillators, Mirrors, Amplifiers, Laser crystals, Optical amplifiers, Crystals, Refractive index, Ions, Holography

Read Abstract +

Proceedings Article | 3 April 2000 Paper

100-W-average-power Nd:YAG laser with adaptive cavity formed by self-induced population gratings

Oleg Antipov, Alexander Kuzhelev, Dmitry Chausov, Andrey Zinoviev, Alexander Fedin, Andrey Gavrilov, Sergey Smetanin

Proceedings Volume 3889, (2000) https://doi.org/10.1117/12.380945

KEYWORDS: Nd:YAG lasers, Mirrors, Oscillators, Optical amplifiers, Amplifiers, Laser crystals, Holography, Refractive index, Diffraction, Nonlinear optics

Read Abstract +

Proceedings Article | 23 March 2000 Paper

Self-starting laser with a nonlinear liquid crystal mirror

Oleg Antipov, Dmitry Chausov, Alexander Kuzhelev, Andrey Zinoviev

Proceedings Volume 3928, (2000) https://doi.org/10.1117/12.379914

KEYWORDS: Mirrors, Optical amplifiers, Liquid crystals, Oscillators, Refractive index, Nd:YAG lasers, Holography, Polarization, Nonlinear crystals, Nonlinear optics

Read Abstract +

Proceedings Article | 26 May 1999 Paper

Degenerate four-wave mixing measurements of the nonlinear response of conjugated silicon-ethynylene polymers

Oleg Antipov, Andrey Afanasiev, George Domrachev, William Douglas, Daniel Guy, Larisa Klapshina, Alexander Kuzhelev

Proceedings Volume 3610, (1999) https://doi.org/10.1117/12.349224

KEYWORDS: Polymers, Silicon, Four wave mixing, Polarization, Nonlinear optics, Calcium, Laser beam diagnostics, Molecular interactions, Pulsed laser operation, Nd:YAG lasers

Read Abstract +

Proceedings Article | 24 May 1999 Paper

High-average-power solid state lasers with cavity formed by self-induced refractive index gratings

Oleg Antipov, Alexander Kuzhelev, Andrey Zinoviev

Proceedings Volume 3611, (1999) https://doi.org/10.1117/12.349251

KEYWORDS: Nd:YAG lasers, Refractive index, Crystals, Laser crystals, Diffraction gratings, Optical amplifiers, Polarization, Mirrors, Polarizers, Solid state lasers

Read Abstract +

Proceedings Article | 20 January 1999 Paper

Design and application of a single-mode Nd:YAG laser with self-pumped phase conjugation in laser crystals and saturable absorber

Oleg Antipov, Tasoltan Basiev, Alexander Fedin, Andrey Gavrilov, Alexander Kuzhelev, Sergey Smetanin

Proceedings Volume 3688, (1999) https://doi.org/10.1117/12.337498

KEYWORDS: Nd:YAG lasers, Laser crystals, Crystals, Transmittance, Phase conjugation, Holography, Diffraction, Calibration, Mirrors, Optical design

Read Abstract +

Proceedings Article | 28 December 1998 Paper

Single-mode Nd:YAG laser with cavity formed by population gratings

Oleg Antipov, Alexander Kuzhelev, Andrey Zinoviev, Andrey Gavrilov, Alexander Fedin, Sergey Smetanin, Tasoltan Basiev

Proceedings Volume 3684, (1998) https://doi.org/10.1117/12.334843

KEYWORDS: Crystals, Nd:YAG lasers, Q switching, Mirrors, Transmittance, Diffraction gratings, Diffraction, Q switch crystals, Laser crystals, Q switched lasers

Read Abstract +

Proceedings Article | 13 May 1998 Paper

Nd:YAG laser with cavity formed by population inversion gratings

Oleg Antipov, Sergey Belyaev, Alexander Kuzhelev, Andrey Zinoviev

Proceedings Volume 3267, (1998) https://doi.org/10.1117/12.308106

KEYWORDS: Nd:YAG lasers, Mirrors, Optical amplifiers, Oscillators, Refractive index, Resonators, Pulsed laser operation, Crystals, Amplifiers, Backscatter

Read Abstract +

Proceedings Article | 11 April 1996 Paper

Laser amplifier with the feedback loop as self-pumped phase conjugator of the light beam

Oleg Antipov, Sergey Belyaev, Alexander Kuzhelev

Proceedings Volume 2771, (1996) https://doi.org/10.1117/12.238078

KEYWORDS: Polarization, Scattering, Phase conjugation, Feedback loops, Laser crystals, Laser amplifiers, Crystals, Amplifiers, Mirrors, Laser scattering

Read Abstract +

Showing 5 of 35 publications

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Keywords/Phrases

Search In:

Publication Years