Kilowatt-class single-frequency fiber sources

Payne, D.N., Jeong, Y., Nilsson, J., Sahu, J.K., Soh, D.B.S., Alegria, C., Codemard, C.A., Philippov, V.N., Hernandez, V., Horley, R., Hickey, L.M.B., Wanzcyk, C.E., Chryssou, C.E., Alvarez-Chavez, J.A. and Turner, P.W. (2005) Kilowatt-class single-frequency fiber sources. Conference on Fiber Lasers II, San Jose. 24 - 27 Jan 2005. (doi:10.1117/12.601145).

Abstract

We discuss the dramatic development of high-power fiber laser technology in recent years and the prospects of kilowatt-class-single-frequency fiber sources. We describe experimental results from an ytterbium-doped fiber-based multi-hundred-watt single-frequency, single-mode, plane-polarized master-oscillator power amplifier (MOPA) operating at 1060 nm and a similar source with 0.5 kW of output power, albeit with a degraded beam quality (M² = 1.6) and not linearly polarized. Experiments and simulations aimed at predicting the Brillouin limit of single-frequency system with a thermally broadened Brillouin gain are presented. These suggest that single-frequency MOPAs with over 1 kW of output power are possible. In addition, the power scalability of a simple single-strand fiber laser to 10 kW is discussed.

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Contributors

Author: J. Nilsson

Author: J.K. Sahu

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