We present a simple modification of the traditional method of locking the laser frequency to the side of an atomic spectral line. We achieve first-order power insensitivity at arbitrary intensity and frequency and in this way eliminate one of the major drawbacks of the traditional method. A similar approach could also be used in locking a laser to a Fabry-Perot cavity.
© 2005 Optical Society of America
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(140.3460) Lasers and laser optics : Lasers
(300.6210) Spectroscopy : Spectroscopy, atomic
(300.6460) Spectroscopy : Spectroscopy, saturation
Milan Maric and Andre Luiten, "Power-insensitive side locking for laser frequency stabilization," Opt. Lett. 30, 1153-1155 (2005)