Abstract
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.
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References
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© 1997 Springer Science+Business Media New York
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Addy, R.C., Palmer, A.W., Grattan, K.T.V. (1997). Aspects of the use of Optical Feedback for Frequency Stabilization of Laser Diodes. In: Lampropoulos, G.A., Lessard, R.A. (eds) Applications of Photonic Technology 2. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-9250-8_123
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DOI: https://doi.org/10.1007/978-1-4757-9250-8_123
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