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OH sensor based on ultraviolet, continuous-wave absorption spectroscopy utilizing a frequency-quadrupled, fiber-amplified external-cavity diode laser

Gustavo J. Ray, Thomas N. Anderson, Jerald A. Caton, Robert P. Lucht, Thomas Walther
2001 Optics Letters  
The development of an all-solid-state continuous-wave laser system for optical absorption measurements of the OH radical in the ultra-violet spectral range is described. The tunable output of a 1064-nm external-cavity diode laser is amplified employing a Nd:doped, double-clad fiber amplifier. The amplified near-infrared radiation is frequency-doubled using a periodically-poled lithium niobate crystal and then quadrupled in a beta barium borate crystal. The design and operation of the system and
more » ... n of the system and measurements of OH absorption in the (2,0) band of the A¢ ¤ £ ¦ ¥ -X¢ § electronic transition are discussed.
doi:10.1364/ol.26.001870 pmid:18059721 fatcat:2g7njmk7qvfdhcv23oapygttyy