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Proceedings Paper

Low-cost cooler-less signal sources for C-WDM applications
Author(s): Junji Yoshida; Keishi Takaki; Ryosuke Yatsu; Naoki Tsukiji; Akihiko Kasukawa
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Paper Abstract

We report the performance of coarse-WDM (C-WDM) uncooled DFB lasers for upper 8 C-WDM wavelengths (1470~1610nm). Due to well-designed structures and well-controlled detuning, low threshold current, high slope efficiency, and high side-mode suppression ratio were maintained even at 85°C. For 2.5Gbps digital applications, these uncooled DFB lasers have clear eye opening, and can transmit through 100km standard single mode fiber with small dispersion penalty (<1dB). For repeater application of mobile communication system, low Relative Intensity Noise (RIN) level of -165dB/Hz at 2.2GHz and -168dB/Hz at 800MHz were achieved respectively at an optimized bias current of over 55mA, and third order distortion (IMD3) was less than -60dBc even at 85°C. For CATV return-path applications, second order distortion (IMD2) of less than -50dBc and IMD3 of less than -65dBc were achieved at 85°C. We performed accelerated aging test and estimated median lifetime was 105hours at 85°C with output power of 5mW.

Paper Details

Date Published: 31 January 2005
PDF: 9 pages
Proc. SPIE 5624, Semiconductor and Organic Optoelectronic Materials and Devices, (31 January 2005); doi: 10.1117/12.581040
Show Author Affiliations
Junji Yoshida, Furukawa Electric Co., Ltd. (Japan)
Keishi Takaki, Furukawa Electric Co., Ltd. (Japan)
Ryosuke Yatsu, Furukawa Electric Co., Ltd. (Japan)
Naoki Tsukiji, Furukawa Electric Co., Ltd. (Japan)
Akihiko Kasukawa, Furukawa Electric Co., Ltd. (Japan)


Published in SPIE Proceedings Vol. 5624:
Semiconductor and Organic Optoelectronic Materials and Devices
Chung-En Zah; Yi Luo; Shinji Tsuji, Editor(s)

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