Sub-Doppler Double Resonance Spectroscopy Of NH3 Using A Tunable Diode Laser

Willes H Weber

doi:10.1117/12.937459

26 November 1983 Sub-Doppler Double Resonance Spectroscopy Of NH3 Using A Tunable Diode Laser

Willes H Weber

Proceedings Volume 0438, Tunable Diode Laser Development and Spectroscopy Applications; (1983) https://doi.org/10.1117/12.937459
Event: 27th Annual Technical Symposium, 1983, San Diego, United States

Abstract

Sub-Doppler double resonance experiments are described in which a fixed frequency CO laser pumps a 6 μm v4 transition in NH3, while a tunable diode laser probes a 10 μm v2 transition having a common lower level. The experiments are done with a precision Stark cell inside the CO laser cavity. A pump transition is Stark-tuned into exact coincidence with the CO laser, which is then Lamb-dip stabilized on the transition. The probe beam overlaps the pump beam colinearly in the Stark cell, and the double resonance signals appear as nar-row transmission peaks on the diode laser frequency scans. The narrowest observed widths are c=d3 MHz (FWHM), a large portion of which is due to unresolved hyperfine structure. An analysis of the various broadening mechanisms indicates that under optimum conditions the diode laser contributes less than 1 MHz to the widths.

Citation Download Citation

Willes H Weber "Sub-Doppler Double Resonance Spectroscopy Of NH3 Using A Tunable Diode Laser", Proc. SPIE 0438, Tunable Diode Laser Development and Spectroscopy Applications, (26 November 1983); https://doi.org/10.1117/12.937459

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