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Proceedings Paper

Wavelength-selectable microarray light sources for wideband DWDM
Author(s): Hiroshi M. Hatakeyama; Yoshitaka Yokoyama; Koichi Naniwae; Koji Kudo; Tatsuya Sasaki
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Paper Abstract

Tunable/selectable-wavelength light sources are now beginning to play important roles in dense wavelength-division multiplexing (DWDM) optical transmission systems. Among the many types of the light sources, we have been developing distributed-feedback (DFB) laser-diode (LD)-array-based 'wavelength-selectable' light sources (WSLs), because of their stable and reliable wavelength properties. This paper reviews our recent progress with WSLs devices and WSL modules for wide-band DWDM applications. We start by describing eight DFB-array WSLs, each of which has a tunable wavelength range (Dl) of 15 nm. We took full advantage of an advanced form of selective metal-organic-vapor-phase epitaxy, which we call microarray selective epitaxy (MASE), in fabricating WSLs of six types on two wafers to fully cover the S-, C-, and L-bands. These WSLs demonstrated high fiber output power of up to around 10 mW and had stable single-mode properties. We also describe a 94-channel (50-GHz spacing) WSL module with an integrated multi-wavelength-locker. A wide-band WSL with a Dl of 40 nm for the L-band, was installed with a compact wavelength locker in a standard-sized 22-pin butterfly package. The WSL module showed a stable locking performance of within a 1-GHz range over time and against variations in temperature.

Paper Details

Date Published: 11 July 2002
PDF: 8 pages
Proc. SPIE 4870, Active and Passive Optical Components for WDM Communications II, (11 July 2002); doi: 10.1117/12.475525
Show Author Affiliations
Hiroshi M. Hatakeyama, NEC Corp. (Japan)
Yoshitaka Yokoyama, NEC Compound Semiconductor Devices Ltd. (Japan)
Koichi Naniwae, NEC Corp. (Japan)
Koji Kudo, NEC Corp. (Japan)
Tatsuya Sasaki, NEC Corp. (Japan)

Published in SPIE Proceedings Vol. 4870:
Active and Passive Optical Components for WDM Communications II
Achyut Kumar Dutta; Abdul Ahad Sami Awwal; Niloy K. Dutta; Katsunari Okamoto, Editor(s)

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