MULTI-CHANNEL WAVELENGTH LOCKER AND LOCKING METHOD THEREOF

摘要

PURPOSE: A multi-channel wavelength locker and a locking method thereof are provided to perform a wavelength locking operation of multi-channel without accurately control environmental factor, such as temperature. CONSTITUTION: A multi-channel wavelength locker includes a polarization beam splitter(110), a wavelength filter(120), a linear polarizer(130), a plurality of detectors(141,143), and a stabilizer circuit(150). The polarization beam splitter(110) is used for splitting an optical signal into two linear-polarized beams when receiving the optical signal. The wavelength filter(120) is used for transmitting the beams having different polarization according to the wavelengths. The linear polarizer(130) is used for transmitting selectively only the linear-polarized beams from the wavelength filter(120) to a desired optical axis. The detectors(141,143) are used for measuring the intensity of the beams the polarization beam splitter(110) and the linear polarizer(130). The stabilizer circuit(150) is used for comparing the intensity of the beams detected by the detectors(141,143) and outputting a feedback signal to a light source according to the compared result.