Gas sensing for measurement of gas components, concentrations, and other parameters plays an important role in many fields. In this Letter, a micro-ring resonator laser used for gas sensing is experimentally demonstra...Gas sensing for measurement of gas components, concentrations, and other parameters plays an important role in many fields. In this Letter, a micro-ring resonator laser used for gas sensing is experimentally demonstrated. The multi-quantumwells micro-ring laser based on whispering-gallery modes with an annular resonator and an output waveguide was fabricated. A single-mode laser with a wavelength of 1746.4 nm was fabricated for the first time, to the best of our knowledge,experimentally. The output power of 1.65 m W under 40 m A injection current was obtained with a side-mode suppression ratio over 33 d B.展开更多
A broadband thyristor laser based on InGaAs/GaAs asymmetric quantum well（AQW） is fabricated by metal organic chemical vapor deposition（MOCVD）. The 3-μm-wide Fabry-Perot（FP） ridge-waveguide laser shows an S-shap...A broadband thyristor laser based on InGaAs/GaAs asymmetric quantum well（AQW） is fabricated by metal organic chemical vapor deposition（MOCVD）. The 3-μm-wide Fabry-Perot（FP） ridge-waveguide laser shows an S-shape I-V characteristic and exhibits a flat-topped broadband optical spectrum coverage of ~27 nm（Δ（-10） dB） at a center wavelength of ~1090 nm with a total output power of 137 mW under pulsed operation. The AQW structure was carefully designed to establish multiple energy states within, in order to broaden the gain spectrum. An obvious blue shift emission, which is not generally acquired in QW laser diodes, is observed in the broadening process of the optical spectrum as the injection current increases. This blue shift spectrum broadening is considered to result from the prominent band-filling effect enhanced by the multiple energy states of the AQW structure, as well as the optical feedback effect contributed by the thyristor laser structure.展开更多
基金supported by the National Key Research and Development Project (Nos. 2017YFB0405300 and 2018YFA0209001)National Natural Science Foundation of China (NSFC) (Nos. 61934007 and 61974141)Beijing MunicipalScienceandTechnologyProject(Nos. Z191100004819011 and 4182064)。
文摘Gas sensing for measurement of gas components, concentrations, and other parameters plays an important role in many fields. In this Letter, a micro-ring resonator laser used for gas sensing is experimentally demonstrated. The multi-quantumwells micro-ring laser based on whispering-gallery modes with an annular resonator and an output waveguide was fabricated. A single-mode laser with a wavelength of 1746.4 nm was fabricated for the first time, to the best of our knowledge,experimentally. The output power of 1.65 m W under 40 m A injection current was obtained with a side-mode suppression ratio over 33 d B.
基金Project supported by the National Natural Science Foundation of China(Nos.61604144,61504137)
文摘A broadband thyristor laser based on InGaAs/GaAs asymmetric quantum well（AQW） is fabricated by metal organic chemical vapor deposition（MOCVD）. The 3-μm-wide Fabry-Perot（FP） ridge-waveguide laser shows an S-shape I-V characteristic and exhibits a flat-topped broadband optical spectrum coverage of ~27 nm（Δ（-10） dB） at a center wavelength of ~1090 nm with a total output power of 137 mW under pulsed operation. The AQW structure was carefully designed to establish multiple energy states within, in order to broaden the gain spectrum. An obvious blue shift emission, which is not generally acquired in QW laser diodes, is observed in the broadening process of the optical spectrum as the injection current increases. This blue shift spectrum broadening is considered to result from the prominent band-filling effect enhanced by the multiple energy states of the AQW structure, as well as the optical feedback effect contributed by the thyristor laser structure.
