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Proceedings Paper

Uncooled DFB lasers for CATV
Author(s): Hitoshi Watanabe; Toshitaka Aoyagi; Kimitaka Shibata; Tohru Takiguchi; Syoichi M. Kakimoto; H. Koyanagi; T. Hatta; K. Sakai; Hideyo Higuchi
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Paper 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.

Paper Details

Date Published: 2 May 1997
PDF: 10 pages
Proc. SPIE 3001, In-Plane Semiconductor Lasers: from Ultraviolet to Midinfrared, (2 May 1997); doi: 10.1117/12.273811
Show Author Affiliations
Hitoshi Watanabe, Mitsubishi Electric Corp. (Japan)
Toshitaka Aoyagi, Mitsubishi Electric Corp. (Japan)
Kimitaka Shibata, Mitsubishi Electric Corp. (Japan)
Tohru Takiguchi, Mitsubishi Electric Corp. (Japan)
Syoichi M. Kakimoto, Mitsubishi Electric Corp. (Japan)
H. Koyanagi, Mitsubishi Electric Corp. (Japan)
T. Hatta, Mitsubishi Electric Corp. (Japan)
K. Sakai, Mitsubishi Electric Corp. (Japan)
Hideyo Higuchi, Mitsubishi Electric Corp. (Japan)


Published in SPIE Proceedings Vol. 3001:
In-Plane Semiconductor Lasers: from Ultraviolet to Midinfrared
Hong K. Choi; Peter S. Zory, Editor(s)

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