Developing Status of Single Frequency Narrow linewidth High energy Hybrid Solid-state Laser Amplifier
演讲课题：Developing Status of Single Frequency Narrow linewidth High energy Hybrid Solid-state Laser Amplifier
Single frequency, narrow linewidth, high energy all solid-state lasers are required for high spectral resolution atmospheric remote sensing. Two or several wavelengths with high energy are used to monitor green-house gas concentration. This kind of laser is based on OPO and OPA with nonlinear crystal. Injection seeding technology is frequently used to achieve single frequency output. While this kind of laser has narrow pulse width and poor energy stability. In the high energy OPA laser, the time delay between pumping OPO and OPA is realized by free space optics. While it is quite un-stable during laser’s long term operation. In this presentation, a single frequency, narrow linewidth multi-wavelength with hybrid amplifier of fiber and bulk crystal is developed. The laser is consisted of frequency stabled multi-wavelength seeder laser. The seeder laser is pulsed modulated and amplified by Yb Doped fiber. Two fiber pre-amplifiers is to pump OPO and OPA, respectively. The time delay between pumping OPO and OPA can be easily to use the length of fiber. The OPA pumping source is consisted of three Nd:YAG slab amplifiers. OPO and OPA at 1572 nm and 2051 nm are demonstrated respectively. And the remained 1064 nm laser is frequency doubled and tripled to output 532 nm and 355 nm with high energy. Thus, this kind of laser can output several wavelength for atmospheric remote sensing of gas, aerosol , cloud and molecule at same time. Both airborne and spaceborne laser will be presented for atmosphere lidar.