Design of a monolithic tunable laser based on equivalent-chirp grating reflectors

A Vernier-tuned distributed Bragg reflector (DBR) semiconductor laser is an effective monolithic approach for wide wavelength tunability, at the expense, however, of costly electron-beam lithography during fabrication. In this Letter, a tunable laser design with equivalent-chirp based, flat-top enve...

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Bibliographic Details
Published in:Optics letters 2010-12, Vol.35 (23), p.3880-3882
Main Authors: Dai, Yitang, Xu, Kun, Wu, Jian, Li, Yan, Hong, Xiaobin, Guo, Hongxiang, Lin, Jintong
Format: Article
Language:English
Subjects:
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Optical elements, devices, and systems
Optics
Physics
Reflectors, beam splitters, and deflectors
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Summary:A Vernier-tuned distributed Bragg reflector (DBR) semiconductor laser is an effective monolithic approach for wide wavelength tunability, at the expense, however, of costly electron-beam lithography during fabrication. In this Letter, a tunable laser design with equivalent-chirp based, flat-top envelope grating reflectors is proposed that can be implemented easily by conventional two-beam interference lithography. The principle is described, and a detailed design shows uniform output power (0.08 dB variation) and excellent side-mode suppression ratio (47 dB minimum) within a wide tuning range (>32 nm) through numerical simulation.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.35.003880