Author(s): Huang, SS (Huang Shu-Shan); Yang, CA (Yang Cheng-Ao); Zhang, Y (Zhang Yu); Xie, SW (Xie Sheng-wen); Liao, YP (Liao Yong-Ping); Chai, XL (Chai Xiao-Li); Xu, YQ (Xu Ying-Qiang); Niu, ZC (Niu Zhi-Chuan)
Source: JOURNAL OF INFRARED AND MILLIMETER WAVES Volume: 37 Issue: 6 Pages: 653-656 DOI: 10.11972/j.issn.1001-9014.2018.06.002 Published: DEC 2018
Abstract: GaSb-based DBR lasers with high-order Bragg gratings are fabricated without complex process. The 16th-order and 24th-order Bragg gratings are fabricated with double-trench ridge waveguide by using standard contact optical lithography respectively. The 16th-order Bragg grating laser achieves single longitudinal mode continuous-wave (CW) operation at room temperature with side mode suppression ratio (SMSR) as high as 17.5 dB. The maximum single mode continuous-wave output power is more than 10 mW at room temperature. The laser shows a very excellent wavelength stability against injection current. The single spatial mode operation is maintained in the entire injection current range. The 24th-order Bragg grating laser even shows a side mode suppression ratio up to 22.5 dB at room temperature. The emission wavelength is around 2.0 mu m.
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