Semi-conductor laser diode phase and amplitude noise cancellation in interferometric fibre optic sensors.

T. P. Newson; F. Farahi; J. D. C. Jones; D. A. Jackson

doi:10.1117/12.960977

29 October 1989 Semi-conductor laser diode phase and amplitude noise cancellation in interferometric fibre optic sensors.

T. P. Newson, F. Farahi, J. D. C. Jones, D. A. Jackson

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Proceedings Volume 1120, Fibre Optics '89; (1989) https://doi.org/10.1117/12.960977
Event: Sira/Fibre Optics '89, 1989, London, United Kingdom

Abstract

In contrast to gas lasers, semi-conductor lasers are small, robust and relatively cheap. The wavelength of the semi-conductor laser is also easily tuned by varying the injection current, allowing a number of electronic processing schemes to be used that are not normally possible with a gas laser. As a consequence of these advantages, the semi-conductor laser is widely used for implementing optical sensors, in particular fibre optic interferometric sensors. However, one major limitation of semi-conductor laser diodes is that they exhibit both amplitude and frequency jitter noise that exceed the noise levels present in for example the HeNe laser.

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T. P. Newson, F. Farahi, J. D. C. Jones, and D. A. Jackson "Semi-conductor laser diode phase and amplitude noise cancellation in interferometric fibre optic sensors.", Proc. SPIE 1120, Fibre Optics '89, (29 October 1989); https://doi.org/10.1117/12.960977

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KEYWORDS

Interferometers

Sensors

Semiconductor lasers

Acoustics

Michelson interferometers

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Fabry–Perot interferometers

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