Good beam quality from a diamond-cooled Er:YAG laser

Daniel O. Hogenboom; Minh Nguyen; Hsian P. Chou

doi:10.1117/12.668994

12 May 2006 Good beam quality from a diamond-cooled Er:YAG laser

Daniel O. Hogenboom, Minh Nguyen, Hsian P. Chou

Proceedings Volume 6216, Laser Source and System Technology for Defense and Security II; 62160F (2006) https://doi.org/10.1117/12.668994
Event: Defense and Security Symposium, 2006, Orlando (Kissimmee), Florida, United States

Abstract

Erbium doped YAG, lasing at 1645 nm from a 1532 nm pump, is an intriguing alternative to wavelength shifted 1-micron lasers for eye-safe applications. In this paper, we will report on an end-pumped Er:YAG laser that employs diamond disks for heat extraction. Using an alternating arrangement of diamond and Er:YAG thin disks, heat flows from the gain material to the diamond along the optical axis and is then radially transmitted to a circulating cooling fluid at the perimeter of the diamond disks. This architecture allows larger diameter disks or rods to be used than conventional radial cooling architectures, thus allowing for higher powers through area scaling. This architecture also provides better beam quality for a given pulse energy. We have demonstrated excellent beam quality (M²=1.3) from a 10-Watt Er:YAG laser. We will also report on results of Q-switching and oscillator-amplifier experiments in a study of the well-known up-conversion process for relatively low dopant concentrations (0.5%-1.0% a.w. of Erbium).

Citation Download Citation

Daniel O. Hogenboom, Minh Nguyen, and Hsian P. Chou "Good beam quality from a diamond-cooled Er:YAG laser", Proc. SPIE 6216, Laser Source and System Technology for Defense and Security II, 62160F (12 May 2006); https://doi.org/10.1117/12.668994

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