Frequency stabilized laser system

Abstract

The invention features a frequency stabilized laser system including a laser source, a first detector, a second detectors, and a circuit. The laser source has an adjustable cavity length and, during operation, produces a control beam including two frequency components having different polarizations. The first detector absorbs a portion of the control beam, reflects the remaining portion of the control beam, and generates a first signal proportional to the intensity of the absorbed portion of the control beam. The second detector absorbs a portion of the reflected beam and generates a second signal proportional to the intensity of the absorbed portion of the reflected beam. The circuit receives the first and second signals from the detectors and generates a control signal based on the first and second signals that controls the adjustable cavity length of the laser source. The frequency stabilized laser system can be used in interferometry applications or any other application in which frequency stability is beneficial.

Dependencies are inferred from the claim text.