Title :
40 dB fibre optical preamplifier in 1064 nm laser Doppler anemometer
Author :
Többen, H. ; Buschmann, Thomas ; Müller, H. ; Dopheide, D.
Author_Institution :
Lab. of Liquid Meters, Phys. Tech. Bundesanstalt, Braunschweig, Germany
fDate :
6/8/2000 12:00:00 AM
Abstract :
With a neodymium-doped fibre amplifier a small signal gain of 40 dB at 1064 nm has been achieved. Using the same amplifier as an optical preamplifier in a conventional 1064 nm laser Doppler anemometer (LDA), an improvement in the SNR of the LDA radiation and sensitivity enhancement in comparison to that for direct detection with a highly sensitive avalanche photodiode was obtained
Keywords :
anemometers; laser Doppler anemometry; laser beams; laser noise; neodymium; optical fibre amplifiers; preamplifiers; sensitivity; 1064 nm; 40 dB; Nd-doped fibre amplifier; direct detection; fibre optical preamplifier; highly sensitive avalanche photodiode; laser Doppler anemometer; optical preamplifier; radiation; sensitivity enhancement; signal-to-noise ratio; small signal gain;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20000786
