Totally conductive-cooled diode-pumped 2-µm laser transmitter

Mulugeta Petros; Jirong Yu; Tony Melak; Bo C. Trieu; Songsheng Chen; Upendra N. Singh; Yingxin Bai

doi:10.1117/12.578953

12 January 2005 Totally conductive-cooled diode-pumped 2-μm laser transmitter

Mulugeta Petros, Jirong Yu, Tony Melak, Bo C. Trieu, Songsheng Chen, Upendra N. Singh, Yingxin Bai

Proceedings Volume 5653, Lidar Remote Sensing for Industry and Environmental Monitoring V; (2005) https://doi.org/10.1117/12.578953
Event: Fourth International Asia-Pacific Environmental Remote Sensing Symposium 2004: Remote Sensing of the Atmosphere, Ocean, Environment, and Space, 2004, Honolulu, Hawai'i, United States

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.

Citation Download Citation

Mulugeta Petros, Jirong Yu, Tony Melak, Bo C. Trieu, Songsheng Chen, Upendra N. Singh, and 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); https://doi.org/10.1117/12.578953

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