RIN‐reduced light source for ultra‐low noise interferometric fibre optic gyroscopes | Zendy

Hakimi F. | Zendy; Moores J.D. | Zendy

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RIN‐reduced light source for ultra‐low noise interferometric fibre optic gyroscopes

Author(s) -

Hakimi F.,

Moores J.D.

Publication year - 2013

Publication title -

electronics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.375

H-Index - 146

ISSN - 1350-911X

DOI - 10.1049/el.2012.3371

Subject(s) - gyroscope , optics , interferometry , photodetector , relative intensity noise , noise (video) , broadband , coherence (philosophical gambling strategy) , physics , fibre optic gyroscope , optical fiber , optoelectronics , photon , laser , semiconductor laser theory , computer science , quantum mechanics , artificial intelligence , image (mathematics)

Incoherent broadband light sources are used in interferometric fibre optic gyroscopes (IFOGs) to mitigate the deleterious effects of Kerr and polarisation nonreciprocity, and backscattering effects in gyroscopes. However, incoherent broadband sources suffer from excess noise or relative intensity noise (RIN), caused by the beating of different spectral components on the photodetector. Unless RIN noise is suppressed, IFOG performance cannot be improved once light on the photodetector exceeds one photon per coherence time (∼μW's). Demonstrated is a low RIN light source capable of significantly improving angle random walk of an IFOG by 12 dB.

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