Design of External Cavity Semiconductor Lasers to Suppress Wavelength Shift and Mode Hopping
نویسنده
چکیده
In this report, a model of external cavity semiconductor laser is built, and then based on this model a program is coded for simulating the thermally induced wavelength shift and mode hopping. By comparing the simulation and the published experimental results of two modified ECL designs we found that our simulation results agree very well with the experimental results. Through theoretical analysis and simulation, it is found for the first time that the thermally induced mode hopping will be increased by using temperature insensitive Bragg grating in WG-ECL. Furthermore, a novel design of external cavity semiconductor lasers with suppressed thermally induced wavelength shift and mode hopping is proposed. The calculation results show that the wavelength stability with temperature is dramatically improved and the side mode suppression ratio (SMSR) remains higher (>35 dB) when temperature changes from 20C to 50C.
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