Patent ID: 6545788
Filing Date: 2003-04-08
Classification: H04B

Abstract:
A method for stabilizing the wavelength of a laser source, the method comprising the steps of:photo-coupling a first path from an output of a laser and passing said first path through a first optical filter to derive a first optical signal; photo-coupling a second path from the output of said laser and passing said second path through a second optical filter to derive a second optical signal; photo-coupling a third path from the output of said laser to derive a third optical signal; converting the optical signal from said first path, the optical signal from said second path, and the optical signal from said third path to electrical signals; converting the electrical signal from said first path, the electrical signal from said second path, and the electrical signal from said third path from analog-to-digital; and using a microcontroller to process said first path digital signal, said second path digital signal, and said third path digital signal to determine frequency variations in the output of said laser, and develop a signal capable of adjusting the output of said laser.