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Proceedings Paper

Operation principle and design of infrared laser wavemeter
Author(s): Liqiang Wang; Aibin Zuo; Yuexiang Peng
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Paper Abstract

The wavemeter can measure a wavelength of a tuned laser and an unknown laser. Due to the Doppler shift, the wavemeter operates and establishes coherent interference fringes on the detectors according to the Michelson interference principle. The movable reflector of the wavemeter is driven by a voice-coin motor. The closed-loop feedback design can ensure the movable reflector to move at a constant speed all the time. The electronic signals of both the reference laser and an unknown laser are multiplied in frequency by PLL (Phase-Locked Loop) unit so as to enhance the resolutions of the wavemeter. PLL unit consists of NE564 and 74LS193. Finally, the counter including a MCU (microcontroller unit), two 8254 programmable times, and a LCD calculates the wavelength of the unknown laser.

Paper Details

Date Published: 10 June 2006
PDF: 6 pages
Proc. SPIE 6344, Advanced Laser Technologies 2005, 634422 (10 June 2006); doi: 10.1117/12.693652
Show Author Affiliations
Liqiang Wang, Beijing Univ. of Posts and Telecommunications (China)
Aibin Zuo, National Institute of Measurement (China)
Yuexiang Peng, Beijing Institute of Petrochemical Technology (China)


Published in SPIE Proceedings Vol. 6344:
Advanced Laser Technologies 2005

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