CKWIND 1550nm Single Frequency Fiber Laser for Environmental Monitoring

Techwin CKWIND 1550nm High Power Single Frequency Fiber Laser Module for Environmental Monitoring

Techwin CKWIND Series 1550nm High Power Single Frequency Fiber Laser Module is an OEM modular narrow linewidth fiber laser designed for short range high precision Coherent Doppler Wind LiDAR applications. Eye-safety working wavelength, single-frequency single longitudinal mode works with a long coherence length. The standard products use polarization-maintaining fiber output, high polarization extinction ratio (PER), output power up to 2W.

Techwin CKWIND series 1550nm high-power single-frequency fiber laser module uses the main oscillator power amplifier (MOPA) structure design. The DFB fiber laser seed has single-frequency, very low phase noise, narrow linewidth characteristics, and the cascaded low noise polarization-maintaining fiber amplifiers for power boosting. The modular design is compact and sturdy, suitable for use in a variety of harsh environments, typically used in wind power Coherent Wind LiDAR, airborne wind LiDAR and so on.

Fiber lasers offered revolutionary capabilities to environmental monitoring. They have been firstly applied in the atmospheric field. Some examples among the possible atmospheric deployment of laser radars, or LiDARs, are: profiling of density, humidity and temperature of air; observation of stratospheric aerosols; monitoring of pollutants. Hydrographic lidars are usually employed in case of fluorescing targets, very important for natural waters. In fact, the main indicators of phytoplankton biomass and biodynamics, i.e. chlorophyll-a (chl-a) and chromophoric dissolved organic matter (CDOM), are fluorescent and can be specifically detected by hydrographic LiDARs.

LiDAR employment in the lithosphere has been limited by the lack of light propagation in soil. In this case, the more relevant environmental use of laser radar is the three-dimensional scan of underground cavities in the fields of mining and archaeology. The state-of-the-art of LiDAR has been recently reviewed in two books edited by C. Weitkamp and T. Fujii and T. Fukuchi, where classical and new techniques of laser remote sensing, as well as spaceborne applications, are thoroughly described. Brief basics of LiDAR methodology in its applications to lithosphere, hydrosphere and atmosphere.