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
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.