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Optical Receiver with a Saturated Electrical Amplifier for Distorted Signal Light
IEICE TRANSACTIONS on Communications
Publication Date: 1999/03/25
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Communication Device and Circuit
optical receiver, power penalty, waveform distortion, semiconductor optical amplifier, channel crosstalk,
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An optical receiver with a saturated electrical amplifier is studied for signal light that is distorted due to the use of a gain-saturated semiconductor optical amplifier or homowavelength crosstalk light. It is shown that less penalty is induced in a receiver with a DC-coupled saturated amplifier than in one with a linear amplifier, in a practical situation where the decision threshold is fixed at a value optimized for a back-to-back signal. The result suggests that a receiver with a saturated amplifier or a limitter is preferable to an automatic gain control circuit for detecting distorted signal lights.