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Wavelength Readout of A Fiber Laser Using Time Delayed Quadrature Sampling  

김종섭 (전북대학교 전자정보공학부)
송민호 (전북대학교 전자정보공학부)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SD / v.41, no.3, 2004 , pp. 31-38 More about this Journal
Abstract
The wavelength variation of a scanned fiber laser is analyzed using quadrature sampling technique. By time delayed sampling of a phase modulated Mach-Zender interferometer, the wavelength information can be precisely determined regardless of the nonlinearity in the Fabry-Perot wavelength filter which scanned the fiber laser. A wavelength readout resolution of ～20 pm was obtained at 2 KHz M-Z modulation frequency, and it was shown that the resolution could be improved in case of using an electro-optic phase modulator.
Keywords
fiber laser; quadrature sampling; Mach-Zender interferometer; Fabry-Perot filter; phase modulator;
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