Flicker Noise in High-Speed Photodetectors

Enrico Rubiola, Ertan Salik, Nan Yu, Lute Maleki

Abstract:	We report on the measurement of the spectra of the phase noise ? and of the amplitude noise a of high-speed p-i-n photodetectors in the presence of microwave modulated optical input. Beside shot noise (white), the spectral densities S? (f) and Sa (f) show flicker noise, which is proportional to 1/f. The 1/f coefficient is of the order of -120 dB[rad2]/Hz for both S? (f) and Sa (f). The experiments indicate that mechanical and electrical isolation from the environment is not simple to achieve, and that optical phenomena in the fiber are easily mistaken for noise in the detector.
Published in:	Proceedings of the 37th Annual Precise Time and Time Interval Systems and Applications Meeting August 29 - 31, 2005 Vancouver, Canada
Pages:	861 - 864
Cite this article:	Rubiola, Enrico, Salik, Ertan, Yu, Nan, Maleki, Lute, "Flicker Noise in High-Speed Photodetectors," Proceedings of the 37th Annual Precise Time and Time Interval Systems and Applications Meeting, Vancouver, Canada, August 2005, pp. 861-864.
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