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Optical Engineering

Nd:YAP 1.34 um/1.08 um laser passively mode-locked/Q-switched by V3+:YAG/BDN II saturable absorbers with efficient COP/AG hollow glass waveguide radiation delivery
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Paper Abstract

A compact, passively Q-switched and mode-locked Nd:YAP laser in oscillator-amplifier configuration was designed and constructed. Operation wavelength switching (between 1.34 and 1.08 xm) was achieved with a three-mirror cavity and mechanical shutter. For Q switching and mode locking of the 1.34-?m Nd:YAP laser transition, a V3 + -doped yttrium aluminum garnet (YAG) saturable absorber was employed. The optimal performance was found after variation of the resonator length (40 to 100 cm) and of the absorber initial transmission (52% to 89%). The duration of a single pulse in a train was around 1 ns. The saturation intensity of the V3 + :YAG absorber was determined to be 10 MW/cm2. A BDN II polymer thin-film saturable absorber was used for Q switching the 1.08-?m laser transition. After amplification, the maximum output energy reached was 27 mJ (train of mode-locked pulses at 1.34 ?m) or 94 mJ (Q-switched pulse at 1.08 ?m). The output laser radiation was delivered by means of a hollow glass waveguide coated with cyclic olefin polymer and Ag, with 95% and 80% efficiencies for 1.34 and 1.08 xm, respectively.

Paper Details

Date Published: 1 August 2002
PDF: 7 pages
Opt. Eng. 41(8) doi: 10.1117/1.1488161
Published in: Optical Engineering Volume 41, Issue 8
Show Author Affiliations
Helena Jelinkova, Czech Technical Univ. (Czech Republic)
Pavel Cerny, Czech Technical Univ. (Czech Republic)
Jan Sulc, Czech Technical Univ. (Czech Republic)
Jan Karol Jabczynski, Military Univ. of Technology (Poland)
Krzysztof Kopczynski, Military Univ. of Technology (Poland)
Zygmunt Mierczyk, Military Univ. of Technology (Poland)
Mitsunobu Miyagi, Tohoku Univ. (Japan)
Yuji Matsuura, Tohoku Univ. (Japan)
Yi-Wei Shi, Tohoku Univ. (Japan)


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