This paper introduces the relationship between the refractive index of nematic liquid crystal and applied voltage
as well as temperature. For the application of liquid crystal Fabry-Perot filter (LC-FPF) in DWDM system
a central wavelength automatic calibration unit is designed and its principle
detailed optical and electric circuit is illustrated. The effect of compensation on temperature drift of the unit is also analysed by calculation example.
Key Laboratory of All Optical Network and Advanced Telecommunication Network, Ministry of Education, Institute of Lightwave Technology, Beijng Jiaotong University
School of Optoelectronic Engineering,Nanjing University of Posts and Telecommunications
School of Optoelectronic Engineering,Nanjing University of Posts & Telecommunications