Aspects of the use of Optical Feedback for Frequency Stabilization of Laser Diodes
Self-mixing interference in laser diodes occurs when light is reflected from an external target back into the laser cavity. The changes in the gain and phase conditions for the resulting compound cavity result in changes in the optical frequency and the intensity of the laser output. The laser diode output may thus be modulated by a change in phase in the external cavity to give a signal similar to the output of a conventional Michelson interferometer. This enables the construction of simple, inexpensive interferometric sensing systems, the necessary components of which are just the laser diode, collimating optics and a target reflector1.
KeywordsLaser Diode Longitudinal Mode External Cavity Optical Feedback Single Longitudinal Mode
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- 4.K. Petermann, Laser Diode Modulation and Noise, Kluwer Academic Publishers, Dordrecht (1991).Google Scholar