For different external cavity lengths, lasing wavelength variation of fiber grating external cavity semiconductor laser (FGECSL) with ambient temperature has been investigated theoretically, and the theoretical result...For different external cavity lengths, lasing wavelength variation of fiber grating external cavity semiconductor laser (FGECSL) with ambient temperature has been investigated theoretically, and the theoretical results are in agreement with reported experimental observations.展开更多
由于在很多特殊应用领域要求980 nm泵浦源半导体激光器具有光谱稳定、低功耗等,本文通过对980nm单模半导体激光器的腔长、腔面反射率及光纤光栅反射率等优化设计,研制出低阈值、高功率980 nm光纤光栅外腔波长稳定半导体激光器。该低功...由于在很多特殊应用领域要求980 nm泵浦源半导体激光器具有光谱稳定、低功耗等,本文通过对980nm单模半导体激光器的腔长、腔面反射率及光纤光栅反射率等优化设计,研制出低阈值、高功率980 nm光纤光栅外腔波长稳定半导体激光器。该低功耗、波长稳定的单模半导体激光器,在100 m A工作电流下尾纤输出功率达到51 m W,3 d B带宽为0.16 nm,边模抑制比大于40 d B,器件在250 m A工作电流下,尾纤输出功率达到120 m W。展开更多
Recent experiments demonstrated that chiral symmetry breaking at an exceptional point(EP) is a viable route to achieve unidirectional laser emission in microring lasers. By a detailed semiconductor laser rate equation...Recent experiments demonstrated that chiral symmetry breaking at an exceptional point(EP) is a viable route to achieve unidirectional laser emission in microring lasers. By a detailed semiconductor laser rate equation model,we show here that unidirectional laser emission at an EP is a robust regime. Slight deviations from the EP condition can break preferential unidirectional lasing near threshold via a Hopf instability. However, abovea "second" laser threshold, unidirectional emission is restored.展开更多
The characteristics of curved semiconductor nanowire （NW） lasers were investigated. The red-shift in the laser spectra with increasing bending angles can be observed much more clearly than that in the photolumi- nes...The characteristics of curved semiconductor nanowire （NW） lasers were investigated. The red-shift in the laser spectra with increasing bending angles can be observed much more clearly than that in the photolumi- nescence （PL） spectra. Due to oscillation of light in resonant cavity, the bending loss of laser exhibits multiple times amplification of that of PL. Furthermore, an abnormal phenomenon of dominant peak switching is found in curved NWs when increasing the pump power, which has been first discovered and reported.展开更多
文摘For different external cavity lengths, lasing wavelength variation of fiber grating external cavity semiconductor laser (FGECSL) with ambient temperature has been investigated theoretically, and the theoretical results are in agreement with reported experimental observations.
文摘由于在很多特殊应用领域要求980 nm泵浦源半导体激光器具有光谱稳定、低功耗等,本文通过对980nm单模半导体激光器的腔长、腔面反射率及光纤光栅反射率等优化设计,研制出低阈值、高功率980 nm光纤光栅外腔波长稳定半导体激光器。该低功耗、波长稳定的单模半导体激光器,在100 m A工作电流下尾纤输出功率达到51 m W,3 d B带宽为0.16 nm,边模抑制比大于40 d B,器件在250 m A工作电流下,尾纤输出功率达到120 m W。
基金National Science Foundation(NSF)(DMR-1506884)Army Research Office(ARO)(W911NF-15-1-0152)
文摘Recent experiments demonstrated that chiral symmetry breaking at an exceptional point(EP) is a viable route to achieve unidirectional laser emission in microring lasers. By a detailed semiconductor laser rate equation model,we show here that unidirectional laser emission at an EP is a robust regime. Slight deviations from the EP condition can break preferential unidirectional lasing near threshold via a Hopf instability. However, abovea "second" laser threshold, unidirectional emission is restored.
基金Acknowledgements This work was supported by the National Natural Science Foundation of China （Grant No. 61177062）, the Program for Zhejiang Leading Team of S＆T Innovation, the Fundamental Research Funds for the Central Universities.
文摘The characteristics of curved semiconductor nanowire （NW） lasers were investigated. The red-shift in the laser spectra with increasing bending angles can be observed much more clearly than that in the photolumi- nescence （PL） spectra. Due to oscillation of light in resonant cavity, the bending loss of laser exhibits multiple times amplification of that of PL. Furthermore, an abnormal phenomenon of dominant peak switching is found in curved NWs when increasing the pump power, which has been first discovered and reported.
基金supported by the National Natural Science Foundation of China(21835003,91833304,21422402,21604043,21674050,and 62004106)the National Key Basic Research Program of China(973 Program,2014CB648300 and 2017YFB0404501)+10 种基金the Natural Science Foundation of Jiangsu Province(BK20160888 and BE2019120)the Program for Jiangsu Specially-Appointed Professor(RK030STP15001)the Six Talent Peaks Project of Jiangsu Province(TD-XCL-009)the 333 Project of Jiangsu Province(BRA2017402)the Natural Science Foundation of the Jiangsu Higher Education Institutions of China(20KJB140005)China Postdoctoral Science Foundation(2020M671553)the NUPT“1311 Project”Scientific Foundation(NY217169,NY215062,NY215107,and NY217087)the Leading Talent of Technological Innovation of National Ten-Thousands Talents Program of China,the Excellent Scientific and Technological Innovative Teams of Jiangsu Higher Education Institutions(TJ217038)the Postgraduate Research&Practice Innovation Program of Jiangsu Province(SJCX21-0297)the Synergetic Innovation Center for Organic Electronics and Information Displays,and the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD)。
