Title :
Intensity noise and spontaneous emission coupling in superluminescent light sources
Author :
Taylor, Henry F.
Author_Institution :
Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA
fDate :
1/1/1990 12:00:00 AM
Abstract :
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
Keywords :
fibre optics; gyroscopes; light sources; noise; photoconductivity; photoemission; superradiance; electronic charge; emission spectrum; excess noise factor; fiber-optic gyroscopes; ideal superluminescent source; intensity noise; light detection; low-noise SLDs; photocurrent; photocurrent noise; quantum amplifier model; spontaneous emission coupling; spontaneous emission coupling factor; superluminescent light sources; superluminescent-diode light sources; Gyroscopes; Light emitting diodes; Light sources; Optical amplifiers; Optical coupling; Optical noise; Photoconductivity; Spontaneous emission; Stimulated emission; Superluminescent diodes;
Journal_Title :
Quantum Electronics, IEEE Journal of
