NDLI: Wavelength-selectable lasers with Bragg-wavelength-detuned sampled grating reflectors

Content Provider	IEEE Xplore Digital Library
Author	Chiu-Lin Yao San-Liang Lee Ing-Fa Jang Wen-Jeng Ho
Copyright Year	1983
Abstract	Wavelength-selectable lasers (WSLs) with a novel type of grating reflectors are proposed for realizing fast tunable lasers that can cover a wide range of wavelengths. Each WSL includes an array of distributed-Bragg-reflection (DBR)-type lasers that are combined with a multimode-interference (MMI) coupler. In order to cover different wavelength bands with simple fabrication, the grating reflector is formed of two sampled-grating (SG) subsections on waveguides of different thicknesses. The resultant Bragg-wavelength detuning from the thickness difference between the two SG subsections causes the maximal refection shift to the high-order reflection peaks. A laser array where each laser covers a different wavelength band is realized by varying the corresponding wavelength position of the second-order peak from laser to laser. Each laser has one-side SGs for allowing one-electrode fast tuning. It can also allow high-reflection facet coating to increase output power. Four-laser WSLs, where each laser can be tuned to cover at least 3.5 nm of wavelength span with a side-mode suppression ratio that is better than 30 dB, are designed and demonstrated. Forty 50-GHz-spaced channels can be covered with the four-laser array
Sponsorship	IEEE Lasers and Electro-Optics Society Optical Society of America
Starting Page	3480
Ending Page	3489
Page Count	10
File Size	1253811
File Format	PDF
ISSN	07338724
Volume Number	24
Issue Number	9
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-09-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Bragg gratings Laser tuning Waveguide lasers Arrayed waveguide gratings Optical arrays Tunable circuits and devices Optical coupling Optical device fabrication Optical reflection Coatings wavelength-selectable lasers (WSLs) Bragg wavelength distributed-Bragg-reflection (DBR) lasers optical switching sampled gratings (SGs) tunable lasers
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics

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