Nonnegligible Loop Delay Time Influence on Coherent Optical Psk Systems Performance
نویسنده
چکیده
The phase-locked loop (PLL) propagation time is important unavoidable factor for high-speed coherent detection systems using broad-linewidth laser diodes. This paper report the linewidths requirements and the power penalties taking into account the loop propagation delay. The coherent optical receivers with PLL, based on Costas loop or decision driven loop (DDL) are taken into consideration. The expressions for phase error variance and receiver bit-error rate are determined the most precisely by now and these expressions are used in power penalty determining. Key-Words: Optical PSK Systems, High-speed transmission, Loop delay time, Performance analysis
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