12 January 2005 Totally conductive-cooled diode-pumped 2-μm laser transmitter
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Abstract
Space Lidar applications benefits from efficient conductive cooled laser transmitters. Effective thermal management is a key challenge for high-energy laser development. In this paper, the design and performance of a totally conductive cooled 2µm laser is presented. Three heat pipes capable of removing 150 watts of heat both from the pump diode lasers and the rod were used in the design. A 2.5 m long ring resonator with two 5-m radii of curvature mirrors set a 2.36mm diameter TEMoo mode radius in the cavity. Despite the thermal gradient that was created in the Ho:Tm: LuLF crystal due to the cooling method and geometry, almost diffraction limited beam and up to 107 mJ of Q-switched output with a pulse length of 135ns was obtained. Such a laser transmitter can be used as a wind Lidar. It is especially suitable as a CO2 DIAL since two Q-switched pulses can be acquired for a single pump pulse due to the long lifetime of the Ho: 5I7 and 5I8 transition and the operating wavelength is near rich CO2 absorption lines.
© (2005) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Mulugeta Petros, Mulugeta Petros, Jirong Yu, Jirong Yu, Tony Melak, Tony Melak, Bo C. Trieu, Bo C. Trieu, Songsheng Chen, Songsheng Chen, Upendra N. Singh, Upendra N. Singh, Yingxin Bai, Yingxin Bai, } "Totally conductive-cooled diode-pumped 2-μm laser transmitter", Proc. SPIE 5653, Lidar Remote Sensing for Industry and Environmental Monitoring V, (12 January 2005); doi: 10.1117/12.578953; https://doi.org/10.1117/12.578953
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