Ao WANG, Yong-gang ZOU, Ming-yu LI, et al. Design and Research of High Tuning Efficiency V-cavity Tunable Semiconductor Laser. [J]. Chinese Journal of Luminescence 41(8):977-983(2020)
Ao WANG, Yong-gang ZOU, Ming-yu LI, et al. Design and Research of High Tuning Efficiency V-cavity Tunable Semiconductor Laser. [J]. Chinese Journal of Luminescence 41(8):977-983(2020) DOI： 10.37188/fgxb20204108.0977.
Design and Research of High Tuning Efficiency V-cavity Tunable Semiconductor Laser
V-cavity tunable semiconductor laser has great potential in optical network because of its advantages of simplicity, compactness and high performance. However, because the thermal conductivity of epitaxial structure is similar, most of the heat for wavelength tuning is lost directly, and so the tuning efficiency of laser is low. In this paper, a V-cavity laser with high tuning efficiency is designed by adding a heat insulation structure in the tuning region of the laser. Through the temperature model of V-cavity laser built by COMSOL Multiphysics, the effect of adding thermal insulation structure on the temperature of each part of the laser is analyzed. Through the optical field distribution established by Rsoft, the proper half wave coupler parameters are selected, so that the laser has the best mode selectivity.The results show that threshold gain difference between the lowest threshold mode and the next lowest threshold mode is 6.07 cm,-1, and the tuning efficiency increases from 0.165 nm/mW to 0.3 nm/mW. Meanwhile, the addition of thermal insulation structure will not cause obvious temperature rise in other areas of the laser, and the negative impact on the device performance can be ignored.
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