Method for active stabilizatiion of an injection locked laser with an optical bandpass filter

A method for implementing a high-power single-frequency laser source, comprising:

• producing, by a master laser, a seeding beam;
• optically coupling an optical isolator with the master laser and configuring the optical isolator to direct the seeding beam;
• optically coupling a slave laser with the optical isolator and configuring the slave laser to receive the directed seeding beam and produce an injection-locked beam;
• inserting an optical bandpass filter between the optical isolator and the slave laser, and configuring the optical bandpass filter to selectively filter a signal beam from the directed seeding beam;
• optically coupling a photodetector with the optical bandpass filter and configuring the photodetector to probe the signal beam;
• electrically connecting a proportional-integral-derivative (PID) controller to the photodetector and configuring the PID controller to produce an output voltage based on a probing signal from the photodetector;
• and
• electrically connecting a current controller to the PID controller and the slave laser and configuring the current controller to regulate a current supplied to the slave laser based on the output voltage produced by the PID controller;
• and
• wherein the slave laser is actively controlled with a side-of-fringe scheme to stabilize a transmission power of the slave laser.