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Kilowatt-class single-frequency fiber sources

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review


Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsL.N. Durvasula, A.J.W. Brown, J. Nilsson
Number of pages9
Publication statusPublished - 2005
Externally publishedYes
Publication typeA4 Article in a conference publication
EventFiber Lasers II: Technology, Systems, and Applications - San Jose, CA, United States
Duration: 24 Jan 200527 Jan 2005


ConferenceFiber Lasers II: Technology, Systems, and Applications
CountryUnited States
CitySan Jose, CA


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 (M 2 = 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 MOP As 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.