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Intensity noise and spontaneous emission coupling in superluminescent light sources

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1 Author(s)
Taylor, H.F. ; Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA

A simple expression for the noise in the photocurrent generated by the detection of light from an ideal superluminescent source is derived using a quantum amplifier model. The excess noise factor X is found to be related to the photocurrent Id, electronic charge e, spontaneous emission coupling factor K , and full width at half maximum power of the emission spectrum Δv1/2 by the expression X=0.664 I d/eKΔv1/2. Implications of this result for the performance of fiber-optic gyroscopes using superluminescent-diode (SLD) light sources and for the design of low-noise SLDs are discussed

Published in:

Quantum Electronics, IEEE Journal of  (Volume:26 ,  Issue: 1 )

Date of Publication:

Jan 1990

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