Abstract.
An all-solid-state continuous-wave laser system for ultraviolet absorption measurements of the nitric oxide (NO) molecule has been developed and demonstrated. The single-mode, tunable output of a 10-mW, 395-nm external-cavity diode laser (ECDL) is sum-frequency-mixed with the output of a 115-mW, frequency-doubled, diode-pumped Nd:YAG laser in a beta-barium-borate crystal to produce 40 nW of tunable radiation at 226.8 nm. The wavelength of the 395-nm ECDL is then scanned over NO absorption lines to produce fully resolved absorption spectra. Initial results from mixtures of NO in nitrogen in a room-temperature gas cell are discussed. The estimated NO detection limit of the system for a demonstrated absorption sensitivity of 2×10-3 is 0.2 ppm per meter of path length for 300 K gas. The estimated accuracy of the measurements is ±10%.
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Received: 25 February 2002 / Revised version: 31 May 2002 / Published online: 8 August 2002
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Hanna, S., Barron-Jimenez, R., Anderson, T. et al. Diode-laser-based ultraviolet absorption sensor for nitric oxide. Appl Phys B 75, 113–117 (2002). https://doi.org/10.1007/s00340-002-0974-9
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DOI: https://doi.org/10.1007/s00340-002-0974-9