Frequency-doubled diode laser for ultraviolet absorption spectroscopy at 325 nm

Laurila, Toni; Hernberg, Rolf
August 2003
Applied Physics Letters;8/4/2003, Vol. 83 Issue 5, p845
Academic Journal
A frequency-doubled tunable diode laser for absorption spectroscopy in the ultraviolet is described. The device is based on an external cavity diode laser with a transmission grating. Second-harmonic generation at 320-327 nm is carried out using a lithium iodate crystal. The measured single-pass cw ultraviolet power is 60 nW and the system has a 40-GHz continuous mode-hop-free tuning range in the ultraviolet. The laser was demonstrated by measuring the 324.75-nm 4 [SUP2]S[SUB½- 4 [SUP2]P[SUB&frac32;] transition of copper at atmospheric pressure with a single continuous scan.


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