Title :
About increase of accuracy of recirculation rangefinder based on a two-wavelength laser
Author :
Kozlov, Vladimir L.
Author_Institution :
Dept. of Radiophys. & Electron., Belarussian State Univ., Minsk
fDate :
Sept. 29 2008-Oct. 4 2008
Abstract :
For the account of the propagation speed of radiation, a precision laser rangefinders based on a two-frequency opto-electronic recirculation and the phase method of measurements have been developed. A semiconductor laser diode with asymmetric quantum-well heterostructure is used as the source of radiation at two different optical wavelengths. It allows to receive information on the propagation speed of laser radiation along the line of supervision and to take into account the exact value of the radiation speed in the distance calculations. Use of the dynamic threshold of comparator provides increase of measurement accuracy due to independence of influence of remote pulses amplitudes on result of measurements.
Keywords :
laser ranging; light propagation; quantum well lasers; asymmetric quantum-well heterostructure; comparator; distance calculations; dynamic threshold; laser radiation; optical wavelengths; precision laser rangefinders; propagation speed; recirculation rangefinder; remote pulses amplitudes; semiconductor laser diode; two-frequency opto-electronic recirculation; two-wavelength laser; Diode lasers; Optical feedback; Optical propagation; Optical refraction; Optical sensors; Optical transmitters; Propagation delay; Pulse measurements; Semiconductor lasers; Wavelength measurement; opto-electronic recirculation; rangefinder; two-wavelengths laser diode;
Conference_Titel :
Advanced Optoelectronics and Lasers, 2008. CAOL 2008. 4th International Conference on
Conference_Location :
Crimea
Print_ISBN :
978-1-4244-1973-9
Electronic_ISBN :
978-1-4244-1974-6
DOI :
10.1109/CAOL.2008.4671906
