Compact, high performant prepare-and-measure photon source based on indistinguishable VCSELs

Erik Beckert; Michael Jetter; Jens Mueller; Matthias Hein; Christopher Spiess; Shadia Chowdhury; Peter Schreiber; Fanhui Zeng; Lena Engel; Michael Zimmer; Ana Cutuk; Shraddha Supreeti; Uwe Stehr; Heike Bartsch; Mahsa Kaltwasser; Marcus Babin

doi:10.1117/12.2691176

13 March 2024 Compact, high performant prepare-and-measure photon source based on indistinguishable VCSELs

Erik Beckert, Michael Jetter, Jens Mueller, Matthias Hein, Christopher Spiess, Shadia Chowdhury, Peter Schreiber, Fanhui Zeng, Lena Engel, Michael Zimmer, Ana Cutuk, Shraddha Supreeti, Uwe Stehr, Heike Bartsch, Mahsa Kaltwasser, Marcus Babin

Author Affiliations +

Proceedings Volume 12911, Quantum Computing, Communication, and Simulation IV; 129110W (2024) https://doi.org/10.1117/12.2691176
Event: SPIE Quantum West, 2024, San Francisco, California, United States

Abstract

We present an ultra-compact, hybrid faint pulse source (FPS) at 850 nm, making use of a linear eight VCSELs array at spectral (<1 pm wavelength difference, and >90% overlap at FWHM) and temporal (<1 ps) indistinguishability, as well as polarization quality in the four H/V/D/A BB84 channels >20 dB. A common VCSEL array on a single substrate is used, at a pitch of 250 μm and with integrated polarizers, having a spectral indistinguishability if the substrate is temperature levelled < 0.5 K. Each VCSEL represents either faint or full amplitude signal for the H/V/D/A channels of the BB84 protocol. The temperature levelling heatsink is made of Molybdenium, integrated on LTCC board to host the emitter substrate and its respective DAC driving circuit at speeds up to 10 GHz. VCSEL integrated micro-lenses and two additional micro-lens arrays fully collimate the beams and refocus them into a waveguide combiner chip which realizes the polarization independent coupling of all eight VCSEL free-space beams with a pulse delay variation <0.2 ps.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Erik Beckert, Michael Jetter, Jens Mueller, Matthias Hein, Christopher Spiess, Shadia Chowdhury, Peter Schreiber, Fanhui Zeng, Lena Engel, Michael Zimmer, Ana Cutuk, Shraddha Supreeti, Uwe Stehr, Heike Bartsch, Mahsa Kaltwasser, and Marcus Babin "Compact, high performant prepare-and-measure photon source based on indistinguishable VCSELs", Proc. SPIE 12911, Quantum Computing, Communication, and Simulation IV, 129110W (13 March 2024); https://doi.org/10.1117/12.2691176

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available