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Intermodulation distortion in optical amplifiers from carrier-density modulation

Intermodulation distortion in optical amplifiers from carrier-density modulation

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© The Institution of Electrical Engineers
Published

We present a theoretical model describing the generation of intermodulation products (IMPs) in semiconductor optical amplifiers by signal-induced carrier-density modulation. The IMPs depend strongly on the linewidth-enhancement factor and the ratio of output intensity to the saturation intensity of the amplifier. Calculation of the total intermodulation penalty for multichannel amplifier applications is possible using the expressions presented.

Inspec keywords: semiconductor junction lasers; carrier density; intermodulation; optical communication equipment; optical modulation; amplifiers

Other keywords: saturation intensity; optical communication equipment; output intensity; linewidth-enhancement factor; intermodulation products; multichannel amplifier applications; semiconductor lasers; carrier-density modulation; optical amplifiers

Subjects: Optical communication; Electromagnetic compatibility and interference; Semiconductor lasers

References

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      • R.M. Jopson , T.E. Darcie , K.T. Gayliard , R.T. Ku , R.E. Tench , T.C. Rice , N.A. Olsson . Measurement of carrier-density mediated intermodulation distortion in an optical amplifier. Electron. Lett. , 1394 - 1395
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      • G.P. Agrawal . Four-wave mixing and phase conjugation in semiconductor media. Opt. Lett. , 260 - 262
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      • Jopson, R.M., Darcie, T.E., Gayliard, K.T.: `Observation of carrier-density mediated intermodulation distortion in an optical amplifier', Paper WN4, Digest of Optical Fiber Conference OFC'88, 1988, New Orlean.
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