Connet CoLIS series 1550nm nanosecond long-pulse single frequency polarization maintaining fiber laser is a modular pulsed fiber laser designed for long-distance (medium-long distance and short-distance) coherent Doppler wind measurement LiDAR applications, pulse width from 100ns to 2us, based on human eye safe working wavelength, linear polarization , singlemode or diffraction limit output. 

Connet CoLIS series 1550nm nanosecond long pulse single frequency polarization maintaining fiber laser internally integrates the CoSF-D single frequency fiber laser seed source. Single frequency fiber laser has lower phase noise and frequency noise than semiconductor laser, which will Bringing benefits to coherent LiDAR, especially to improve the signal-to-noise ratio of the system, the CoLIS single frequency fiber laser module has built-in very effective relative intensity noise (RIN) suppression technology, which reduces the relaxation oscillation peak value of the single frequency fiber laser to in line with the level of semiconductor lasers, it drops below -145dBc / Hz. This combination perfectly highlights the unmatched performance of CoLIS long pulse single frequency fiber lasers with low phase noise and low relative intensity noise (RIN). With the built-in cascaded acousto-optic modulator (AOM), CoLIS can generate the pulse signals with high extinction ratio up to 100dB. 

CoLIS series 1550nm nanosecond long-pulse single frequency polarization maintaining fiber laser adopts the full polarization maintaining fiber design to achieve the high polarization extinction ratio (PER) output. The output end can be integrated with high power three-port optical circulators according to application requirements.