Chinese Optics Letters, 2016, 14 (1): 011406, Published Online: Aug. 6, 2018  

1.5  μm dual-lateral-mode distributed Bragg reflector laser for terahertz excitation

Author Affiliations
Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Science, and Beijing Key Laboratory of Low Dimensional Semiconductor Materials and Devices, Beijing 100083, China
Abstract
A terahertz excitation source based on a dual-lateral-mode distributed Bragg reflector (DBR) laser working in the 1.5 μm range is experimentally demonstrated. By optimizing the width of the ridge waveguide, the fundamental and the first-order lateral modes are obtained from the laser. The mode spacing between the two modes is 9.68 nm, corresponding to a beat signal of 1.21 THz. By tuning the bias currents of the phase and DBR sections, the wavelengths of the two modes can be tuned by 2 nm, with a small strength difference (<5 dB) and a large side-mode suppression ratio (SMSR>45 dB).

Limgeng Zhang, Liqiang Yu, Biwei Pan, Dan Lu, Jiaoqing Pan, Lingjuan Zhao. 1.5  μm dual-lateral-mode distributed Bragg reflector laser for terahertz excitation[J]. Chinese Optics Letters, 2016, 14(1): 011406.

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