High resolution spectroscopy of ammonia in a hollow-core fiber
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© 2008 Optical Society of America. This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://dx.doi.org/10.1364/OE.16.003976. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
Optics Express, 2008, 16(6), 3976-3985
Optical Society of America
We have demonstrated frequency modulation saturation spectroscopy of the ν1+ν3 band of ammonia in hollow-core photonic bandgap fibers (HC-PBFs). Previously blended lines have been resolved and the corresponding molecular transitions assigned. Cross-over resonances are observed between transitions that do not share a common level. We have measured the pressure dependence of the line shape and determined the collisional self-broadening coefficients for ammonia. The many absorption lines of ammonia in the 1.5 µm wavelength region are potential frequency references lines for optical communication as well as candidates for spectroscopic trace gas monitoring.
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