Method to sense laser array power and wavelength and reduce drift for wavelength selection and stabilization

摘要

The output of a dedicated control laser element in a laser array, which closely tracks the output of the array, is directed to a discriminator and feedback control means through a closed loop feedback-based system to provide both wavelength stability and power control of the array without reducing the optical power output from the array. The output of a dedicated control laser element in a laser array is also directed to a discriminator and synchronous detection means and is frequency modulated with a local oscillator to reduce the electronic drift and stabilize the wavelength of the dedicated laser source.