INVESTIGATION OF THE TEMPERATURE SHIFT OF THE WAVELENGTH OF A SEMICONDUCTOR LASER DIODE IN A DOPPLER ANEMOMETER
V.A. Pavlov, G.V. Bakakin, V.V. Rakhmanov, S.V. Dvoynishnikov
Kutateladze Institute of Thermophysics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: wavelength shift, semiconductor laser diode, laser Doppler anemometer
Abstract
The temperature stability of the laser wavelength is an important characteristic of a laser Doppler anemometer with chromatic channel separation. In this work, experimental studies of the wavelength shift of a semiconductor laser diode by 660 nm as a function of temperature and laser radiation power are carried out. It is established that the temperature drift of the wavelength lies within 0.2 nm/°C. It is shown that the use of semiconductor diodes of this type in laser Doppler anemometers with chromatic channel separation is possible, but requires careful selection of optical filters.
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