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This article is cited in 3 scientific papers (total in 3 papers)
Use of lasers in modulation spectroscopy
S. A. Akhmanov, Yu. D. Golyaev, S. V. Lantratov
Abstract:
A theoretical analysis is made of the sensitivity of modulation spectroscopy using single-mode solid-state and gas lasers, and various types of photodetectors. The analysis is based on calculations of the signal-to-noise ratio allowing for laser and photodetector noise. It is shown that the sensitivity of modulation spectroscopy is essentially governed by the photodetector noise. For a photodiode the smallest detectable relative fluctuations of the absorption are ~2×10–8 whilst those of the refractive index and birefringence are ~4×10–12. It is demonstrated that intracavity modulation spectroscopy using a solid-state laser can raise the sensitivity by a factor of 10–50 for a photodiode and by a factor of 103–104 for a photomultiplier, as compared with the extracavity technique. For gas lasers there is no improvement using photodiodes but an approximately sixtyfold improvement with photomultipliers.
Received: 28.06.1977
Citation:
S. A. Akhmanov, Yu. D. Golyaev, S. V. Lantratov, “Use of lasers in modulation spectroscopy”, Kvantovaya Elektronika, 5:6 (1978), 1329–1340 [Sov J Quantum Electron, 8:6 (1978), 758–764]
Linking options:
https://www.mathnet.ru/eng/qe10394 https://www.mathnet.ru/eng/qe/v5/i6/p1329
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