We present a novel compact pulsed laser spectrometer based on difference-frequency mixing of a cw tunable external-cavity diode laser (795–825 nm) and a pulsed Nd:YAG laser (1064 nm) in bulk . The pulsed mid-IR source is continuously tunable from 3.16 to and exhibits a linewidth of only 154 MHz, a peak power of , and a pulse duration of 6 ns at a 6.5-kHz repetition rate. Spectra of methane in room air and formaldehyde have been recorded at room-temperature operation in a multipass cell with deduced detection limits of 10 and 40 parts in , respectively.
© 1999 Optical Society of AmericaFull Article | PDF Article
L. Goldberg, J. Koplow, D. G. Lancaster, R. F. Curl, and F. K. Tittel
Opt. Lett. 23(19) 1517-1519 (1998)
D. G. Lancaster, D. Richter, R. F. Curl, F. K. Tittel, L. Goldberg, and J. Koplow
Opt. Lett. 24(23) 1744-1746 (1999)
Thomas Töpfer, Konstantin P. Petrov, Yasuharu Mine, Dieter Jundt, Robert F. Curl, and Frank K. Tittel
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