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Development of a high-pulse-energy Q-switched Tm-doped double-clad fluoride fiber laser and its application to the pumping of mid-IR lasers

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Abstract

A diode-pumped Q-switched Tm-doped double-clad fluoride fiber laser is reported providing up to 90μJ pulse energy (160ns, 100kHz, i.e., 9W of average power). The dependence of the fiber laser’s repetition rate on pump power and modulator repetition rate was investigated. By amplification even higher pulse energies of 410μJ could be generated. In a second stage of the setup the Q-switched fiber laser serves as a pump for a gain-switched tunable Cr2+:ZnSe laser. The pulse energies reported are to the author’s knowledge the highest generated by Tm-doped fluoride fiber lasers or amplifiers today.

© 2007 Optical Society of America

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