Design of high performance DBR lasers for WDM fiber optic communications

H. H. Yee; C. L. Xiao; C K. Liao; H. Y. Tung; H. H. Lu

doi:10.1117/12.745567

19 November 2007 Design of high performance DBR lasers for WDM fiber optic communications

H. H. Yee, C. L. Xiao, C K. Liao, H. Y. Tung, H. H. Lu

Proceedings Volume 6782, Optoelectronic Materials and Devices II; 67822S (2007) https://doi.org/10.1117/12.745567
Event: Asia-Pacific Optical Communications, 2007, Wuhan, China

Abstract

Four-section sampled-grating DBR (SGDBR) lasers, including two sampled grating DBRs, gain and phase tuning sections, were designed by a InGaAlAs / InP strained multiple quantum well microstructure. The lengths of gain and phase sections are 280 μm and 150 μm, respectively. One SGDBR, accommodating 10 sample periods with a total length of 270 μm, is situated adjacent to the gain, and another SGDBR, containing 11 sample periods with a total length of 330 μm, is to the right of phase section. The estimated threshold current and characteristic temperature, T₀ , were 10 mA and 166 °K respectively. High T₀ reflects excellent electron confinement of the MQW structure. The optical coupling strength and the cavity-mode spacing of DBR lasers were carefully chosen. With appropriate tuning mechanisms, the tunable SGDBR lasers produced 172 transmission channels, each with side-mode suppression ratios higher than 40 dB. Under 100 mA current driving, the lasers could be operated with a bandwidth of 20 GHz and the channel switching could be completed within 1 nS. Moreover, from the observations on the relative intensity noises as well as on the eye diagram, the lasers do exhibit excellent dynamic characteristics.

Citation Download Citation

H. H. Yee, C. L. Xiao, C K. Liao, H. Y. Tung, and H. H. Lu "Design of high performance DBR lasers for WDM fiber optic communications", Proc. SPIE 6782, Optoelectronic Materials and Devices II, 67822S (19 November 2007); https://doi.org/10.1117/12.745567

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KEYWORDS

Reflectivity

Semiconductor lasers

Seaborgium

Tunable lasers

Eye

Dense wavelength division multiplexing

Fiber lasers

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