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Study on cascaded tunable DBR semiconductor laser with wide tuning range and fast switching speed
Author(s): Zhengpeng Zou; Yong Zhao; Chunliang Ma; Min Chen; Yuechun Shi; Xiangfei Chen
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Paper Abstract

A compact cascaded tunable distributed Bragg reflection (DBR) semiconductor laser is proposed and simulated. Each laser section (LS) is formed by two passive adjacent grating sections (GSs) with slightly different Bragg wavelengths and an active section (AS) between them. A step-wise grating period profile is designed to realize wide range lasing. Since two LSs share a common GS, the total cavity length of the tunable laser is significantly reduced. As an example, a tunable laser with four GSs and three ASs was designed and analyzed, resulting in a continuous tuning range of 13.2 nm. Furthermore, an improved structure with apodized grating in each GS is proposed for good single mode property. The single mode stability and fabrication tolerance are significantly improved. Particularly, this structure based lasers has a fast switching speed of about 5ns. The proposed structure would benefit the practical applications to the low cost tunable lasers in wavelength division multiplexing (WDM) systems.

Paper Details

Date Published: 15 November 2018
PDF: 7 pages
Proc. SPIE 10964, Tenth International Conference on Information Optics and Photonics, 109644U (15 November 2018); doi: 10.1117/12.2506215
Show Author Affiliations
Zhengpeng Zou, Nanjing Univ. (China)
Yong Zhao, Nanjing Univ. (China)
Chunliang Ma, Nanjing Univ. (China)
Min Chen, Nanjing Univ. (China)
Yuechun Shi, Nanjing Univ. (China)
Xiangfei Chen, Nanjing Univ (China)

Published in SPIE Proceedings Vol. 10964:
Tenth International Conference on Information Optics and Photonics
Yue Yang, Editor(s)

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