A hybrid integrated low-noise linear chirp frequency-modulated continuous-wave(FMCW)laser source with a wide frequency bandwidth is demonstrated.By employing two-dimensional thermal tuning,the laser source shows frequ...A hybrid integrated low-noise linear chirp frequency-modulated continuous-wave(FMCW)laser source with a wide frequency bandwidth is demonstrated.By employing two-dimensional thermal tuning,the laser source shows frequency modulation bandwidth of 10.3 GHz at 100 Hz chirped frequency and 5.6 GHz at 1 kHz chirped frequency.The intrinsic linewidth of 49.9 Hz with 42 GHz continuous frequency tuning bandwidth is measured under static operation.Furthermore,by pre-distortion linearization of the laser source,it can distinguish 3 m length difference at 45 km distance in the fiber length measurement experiment,demonstrating its application potential in ultra-long fiber sensing and FMCW light detection and ranging.展开更多
基金National Key Research and Development Program of China(2018YFB2201802)National Natural Science Foundation of China(61771285).
文摘A hybrid integrated low-noise linear chirp frequency-modulated continuous-wave(FMCW)laser source with a wide frequency bandwidth is demonstrated.By employing two-dimensional thermal tuning,the laser source shows frequency modulation bandwidth of 10.3 GHz at 100 Hz chirped frequency and 5.6 GHz at 1 kHz chirped frequency.The intrinsic linewidth of 49.9 Hz with 42 GHz continuous frequency tuning bandwidth is measured under static operation.Furthermore,by pre-distortion linearization of the laser source,it can distinguish 3 m length difference at 45 km distance in the fiber length measurement experiment,demonstrating its application potential in ultra-long fiber sensing and FMCW light detection and ranging.
