SNR enhancement of intensity noise-limited FOGs

Autor:	R. T. de Carvalho, James N. Blake, R.C. Rabelo
Rok vydání:	2000
Předmět:	Physics Noise temperature Noise (signal processing) business.industry Relative intensity noise Noise reduction Noise spectral density Physics::Optics Optical power Noise floor Atomic and Molecular Physics and Optics Signal-to-noise ratio Optics business
Zdroj:	Journal of Lightwave Technology. 18:2146-2150
ISSN:	1558-2213 0733-8724
Popis:	The signal-to-noise ratio (SNR) of fiber-optic gyroscopes (FOGs) is directly impacted by the optical power coupled to the interferometric circuit. The optical intensity noise produced by the optical broadband source becomes the major component of the total noise at the output when the optical power reaching the detector is more than a few tens of microwatts. This work shows the implementation of a signal processing scheme capable of promoting reduction of the source intensity noise around the proper frequency of birefringent FOG, where the optimum signal demodulation takes place, yielding a better SNR. The total SNR has been enhanced 6.6 dB by means of a 20.4 dB reduction in the noise component associated only with the source intensity noise.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::00e357775c72e57db084f9d415192ceb https://doi.org/10.1109/50.908826 Zobrazit plný text záznamu