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A multiwavelength fiber ring-laser employing a pair of silica-based arrayed-waveguide-gratings

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4 Author(s)
Miyazaki, T. ; KDD Kamifukuoka R&D Labs., Saitama, Japan ; Edagawa, N. ; Yamamoto, S. ; Akiba, Shigeyuki

A multiwavelength fiber ring-laser employing a pair of silica-based arrayed-waveguide-gratings (AWGs) is proposed to easily implement a stable multiwavelength operation for a variety of research needs. A fixed multiwavelength operation is available when the free-spectral-range (FSR) of the AWGs is wide enough to cover the gain bandwidth of deployed erbium-doped fiber amplifiers (EDFAs). A tunable multiwavelength operation is also available when the FSR is narrower than the gain bandwidth. 15 channels with 1.6-nm spacing in the fix type, and five channels with about 40-nm discretely tunable range at 1.4-nm spacing in the tunable type and almost 50-dB signal to amplified spontaneous emission (ASE) ratio in both types are demonstrated.

Published in:

Photonics Technology Letters, IEEE  (Volume:9 ,  Issue: 7 )

Date of Publication:

July 1997

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