# A CW DYE LASER FOR MICROWAVE OPTICAL DOUBLE RESONANCE SPECTROSCOPY

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 Title: A CW DYE LASER FOR MICROWAVE OPTICAL DOUBLE RESONANCE SPECTROSCOPY Creators: English, Alan D.; Field, R. W.; Tanaka, Takehiko; Jennings, D. E. Issue Date: 1973 Publisher: Ohio State University Abstract: A CW dye laser has been constructed which is sufficiently tunable, stable, monochromatic and powerful to observe microwave-optical double resonance in the $X^{1}\Sigma$ and $A^{1}\Sigma$ states of BaO. Similar double resonance experiments using the 496.5 nm line of an $Ar^{+}$ laser have been $reported.^{1,2}$ The laser is frequency stabilized and fine tuned with two internal etalons and operates in a single longitudinal mode with power near 50 milliwatts. A procedure has been developed to tune the laser to the wavelength of any molecular absorption line in the 565-620 nm spectral region. With occasional adjustment the laser will neither drift nor jump off of the desired molecular line. Description: This work was supported in part by Army Grant No. DA-ARO-D-31-124-72-G181, NSF Grant Nos. NSF-GP-14011 and NSF-GP-35672X, and AFOSR Grant No. AFOSR-70-1851. $^{1}$ R.W. Field, et al., J. Chem. Phys. 56, 4712 (1972). $^{2}$ R.W. Field, et al., J. Chem. Phys. 57, 2209 (1972). Author Institution: Quantum Institute, University of California URI: http://hdl.handle.net/1811/15989 Other Identifiers: 1973-F-07