G Gagliardi et al 2000 J. Opt. A: Pure Appl. Opt. 2 310 doi:10.1088/1464-4258/2/4/312
G Gagliardi1, G Rusciano1 and L Gianfrani1,2
Show affiliationsWe report on saturated-absorption spectroscopy of H218O at 1.39 µm by means of a low-power distributed feedback diode laser. In the transit-time regime, we observed a 2.5 MHz wide line. This is the first narrow resonance in the spectral window around 1.4 µm. Possible applications in metrology are discussed. In addition, we propose some experimental schemes to measure the absolute frequency of H218O lines in this spectral region.
42.55.Px Semiconductor lasers; laser diodes
33.70.Jg Line and band widths, shapes, and shifts
42.60.Da Resonators, cavities, amplifiers, arrays, and rings
Issue 4 (July 2000)
Received 14 December 1999, in final form 29 March 2000
G Gagliardi et al 2000 J. Opt. A: Pure Appl. Opt. 2 310
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