Jpn. J. Appl. Phys. 46 (2007) pp. 226-228  |Previous Article| |Next Article|  |Table of Contents|
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Brief Communication

Generation of Broadband Mid-Infrared Pulses by Noncollinear Difference Frequency Mixing

Akihiro Sugita, Keiichi Yokoyama, Hidetaka Yamada, Norihiro Inoue, Makoto Aoyama, and Koichi Yamakawa

(Received July 7, 2006; revised September 13, 2006; accepted September 18, 2006; published online January 10, 2007)

The generation of broadband mid-infrared (MIR) laser pulses by difference frequency mixing (DFM) is investigated. Two-color femtosecond pulses from a Ti:sapphire laser system are mixed in an AgGaS₂ crystal using a noncollinear phase matching scheme. The relative bandwidth of the generated MIR pulse has been measured to be 23% of the central frequency, the broadest in DFM-based MIR sources reported thus far. It is found that a type-I crystal can yield a broader phase matching range of the spectrum than a type-II crystal within this scheme.

URL: http://jjap.jsap.jp/link?JJAP/46/226/
DOI: 10.1143/JJAP.46.226

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