Uncooled DFB lasers for CATV

Hitoshi Watanabe; Toshitaka Aoyagi; Kimitaka Shibata; Tohru Takiguchi; Syoichi M. Kakimoto; H. Koyanagi; T. Hatta; K. Sakai; Hideyo Higuchi

doi:10.1117/12.273811

2 May 1997 Uncooled DFB lasers for CATV

Hitoshi Watanabe, Toshitaka Aoyagi, Kimitaka Shibata, Tohru Takiguchi, Syoichi M. Kakimoto, H. Koyanagi, T. Hatta, K. Sakai, Hideyo Higuchi

Author Affiliations +

Proceedings Volume 3001, In-Plane Semiconductor Lasers: from Ultraviolet to Midinfrared; (1997) https://doi.org/10.1117/12.273811
Event: Photonics West '97, 1997, San Jose, CA, United States

Abstract

Strained-layer MQW-DFB lasers at a wavelength of 1.3 micrometers operating from -40 degree(s)C to 85 degree(s)C without any coolers are demonstrated. On the basis of the leakage current analysis, a laser structure including the active layer and the current blocking layer is chosen to achieve low distortion over wide-temperature-range. Extremely low threshold current of 17 mA at 85 degree(s)C and operation current of 37 mA at 5 mW and 85 degree(s)C are obtained. The lasers realize low distortion of less than -50 dBc at 65 degree(s)C in 78-channel CSO measurements. Furthermore, a fabricated laser module with a coaxial package also achieved low CSO values of -55 dBc under 16-channel loading in the temperature range from -40 degree(s)C to 85 degree(s)C. This uncooled DFB laser module is very useful for return path application in CATV systems.

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Hitoshi Watanabe, Toshitaka Aoyagi, Kimitaka Shibata, Tohru Takiguchi, Syoichi M. Kakimoto, H. Koyanagi, T. Hatta, K. Sakai, and Hideyo Higuchi "Uncooled DFB lasers for CATV", Proc. SPIE 3001, In-Plane Semiconductor Lasers: from Ultraviolet to Midinfrared, (2 May 1997); https://doi.org/10.1117/12.273811

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KEYWORDS

Distortion

Temperature metrology

Modulation

Quantum wells

Analog electronics

Electroluminescence

Fabry–Perot interferometers

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