LASER WAVELENGTH CONTROL DEVICE

摘要

A laser control system is disclosed including a microprocessor, which precisely adjusts the wavelength of light ouput from the laser (118) by monitoring the transmissivity of an in-fiber Bragg grating (124) coupled to the output of the laser. The Bragg grating is fabricated to have a minimum transmissivity at the desired output wavelength of the laser. The microprocessor continually adjusts the wavelength of the laser output to obtain substantially minimal transmissivity through the grating. At which point, the laser is locked to the desired wavelength. Alternatively, the microprocessor can monitor light reflected from the grating, and continually adjust the wavelength of the laser output to lock the laser at a wavelength providing substantially maximum reflectance by the grating. Use in an optoelectronic wavelength converter.