High power cw and mode-locked oscillators based on Yb:KYW multi-crystal resonators

High Q Laser Production GmbH, Kaestle-Areal, Hohenems, Austria.
Optics Express (Impact Factor: 3.53). 12/2008; 16(23):18838-43. DOI: 10.1364/OE.16.018838
Source: PubMed

ABSTRACT We report on a high power diode-pumped laser using multiple bulk Yb:KY(WO(4))(2) (KYW) crystals in a resonator optimised for this operation. From a dual-crystal resonator we obtain more than 24 W of cw-power in a TEM(00) mode limited by the available pump power. We also present results for semiconductor saturable absorber mirror (SESAM) mode-locking in the soliton as well as positive dispersion regime with average output powers of 14.6 W and 17 W respectively.

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    ABSTRACT: We present a dual-crystal Yb:KGW laserthat iscapable to operate as a Q-switched oscillator with output power up to 24 W and pulse length of 20 ns,or as a regenerative amplifier with output power up to 21 W and pulse duration below 200 fs after compression of chirped pulses. Both lasers have excellent beam quality with beam parameter M2<1.2. We discuss some aspects of the design and performance optimization of dual-crystal Yb:KGW laser system.
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