为了测量87Sr原子光晶格钟的钟激光频率和控制红冷却激光及光晶格激光的绝对频率,实验建立了一套掺铒光纤光学频率梳系统,并将其锁定到了氢钟参考信号上。光梳的可见光测量部分对689、698及813 nm等特定波长功率进行了优化(在同一扩谱...为了测量87Sr原子光晶格钟的钟激光频率和控制红冷却激光及光晶格激光的绝对频率,实验建立了一套掺铒光纤光学频率梳系统,并将其锁定到了氢钟参考信号上。光梳的可见光测量部分对689、698及813 nm等特定波长功率进行了优化(在同一扩谱支路中不同时获得),其输出光谱功率大于120 m W,单点频率下的功率在2 nm宽度时大于200 m W。实验得到的外激光和光梳梳齿拍频信号信噪比大于30 d B(在分辨率带宽300 k Hz时观测),锁定后频率跟踪秒级稳定度优于60 m Hz。展开更多
An environmentally stable, repetition rate tunable, all-polarization-maintaining, Er-doped pulse fiber laser with a single-wall carbon nanotubes saturated absorber is demonstrated. The ring laser cavity includes a del...An environmentally stable, repetition rate tunable, all-polarization-maintaining, Er-doped pulse fiber laser with a single-wall carbon nanotubes saturated absorber is demonstrated. The ring laser cavity includes a delay line enabling a tunable repetition rate to vary from 35.52 MHz to 35.64 MHz with continuous mode-locked operation. The laser output parameters confirm that the tunable mode-locked operations are stable. High environmental stability is also confirmed by the -130 dBc/Hz low phase noise, a 70-dB signal-to-noise ratio of radio frequency signals, a low amplitude fluctuation of 5.76 × 10-4, and a low fluctuation of reoetition rate of 12 Hz. The laser shows a high de^ree of oolarization of 93%.展开更多
Transitional operations of multiple dissipative solitons in a long-cavity normal-dispersion Yb-doped fiber laser are experimentally investigated.Multiple dissipative solitons,including a stable soliton pair and a soli...Transitional operations of multiple dissipative solitons in a long-cavity normal-dispersion Yb-doped fiber laser are experimentally investigated.Multiple dissipative solitons,including a stable soliton pair and a soliton triplet are observed by increasing the pump power or adjusting the polarization controllers.Two main boundaries of the stable asymmetric soliton and oscillating soliton are found between steady mode-locking.Moreover,multiple dissipative solitons with greater quantities of solitons are observed with pump power increasing.The experimental results agree well with a previous numerical study of multiple dissipative solitons.展开更多
We report a passively mode-locked erbium-doped fiber laser based on a compact magneto-optic crystal polarization controller.The length of the polarization controller consisting of four magneto-optic crystal rotators a...We report a passively mode-locked erbium-doped fiber laser based on a compact magneto-optic crystal polarization controller.The length of the polarization controller consisting of four magneto-optic crystal rotators and two quarter wave-plates is only 10cm.Adjusting the polarization controller,central wavelength around 1559nm and repetition rate 21.10 MHz mode-locked pulse are obtained.Pulse duration and 3 dB spectrum width are 598.4fs and 6.24nm respectively.Single pulse energy is about 151.7pJ.Because of its small size,low insertion loss,good controllability and negligible dispersion,the magneto-optic crystal polarization controller could be an ideal polarization controller in fiber lasers.展开更多
文摘为了测量87Sr原子光晶格钟的钟激光频率和控制红冷却激光及光晶格激光的绝对频率,实验建立了一套掺铒光纤光学频率梳系统,并将其锁定到了氢钟参考信号上。光梳的可见光测量部分对689、698及813 nm等特定波长功率进行了优化(在同一扩谱支路中不同时获得),其输出光谱功率大于120 m W,单点频率下的功率在2 nm宽度时大于200 m W。实验得到的外激光和光梳梳齿拍频信号信噪比大于30 d B(在分辨率带宽300 k Hz时观测),锁定后频率跟踪秒级稳定度优于60 m Hz。
文摘An environmentally stable, repetition rate tunable, all-polarization-maintaining, Er-doped pulse fiber laser with a single-wall carbon nanotubes saturated absorber is demonstrated. The ring laser cavity includes a delay line enabling a tunable repetition rate to vary from 35.52 MHz to 35.64 MHz with continuous mode-locked operation. The laser output parameters confirm that the tunable mode-locked operations are stable. High environmental stability is also confirmed by the -130 dBc/Hz low phase noise, a 70-dB signal-to-noise ratio of radio frequency signals, a low amplitude fluctuation of 5.76 × 10-4, and a low fluctuation of reoetition rate of 12 Hz. The laser shows a high de^ree of oolarization of 93%.
文摘Transitional operations of multiple dissipative solitons in a long-cavity normal-dispersion Yb-doped fiber laser are experimentally investigated.Multiple dissipative solitons,including a stable soliton pair and a soliton triplet are observed by increasing the pump power or adjusting the polarization controllers.Two main boundaries of the stable asymmetric soliton and oscillating soliton are found between steady mode-locking.Moreover,multiple dissipative solitons with greater quantities of solitons are observed with pump power increasing.The experimental results agree well with a previous numerical study of multiple dissipative solitons.
文摘We report a passively mode-locked erbium-doped fiber laser based on a compact magneto-optic crystal polarization controller.The length of the polarization controller consisting of four magneto-optic crystal rotators and two quarter wave-plates is only 10cm.Adjusting the polarization controller,central wavelength around 1559nm and repetition rate 21.10 MHz mode-locked pulse are obtained.Pulse duration and 3 dB spectrum width are 598.4fs and 6.24nm respectively.Single pulse energy is about 151.7pJ.Because of its small size,low insertion loss,good controllability and negligible dispersion,the magneto-optic crystal polarization controller could be an ideal polarization controller in fiber lasers.
