Title :
Noise analysis of photonic packet synchronizer
Author :
Fang, Wei ; Zhong, Wen-De
Author_Institution :
Network Technol. Res. Center, Nanyang Technol. Univ., Singapore, Singapore
Abstract :
This paper investigates and analyzes the in-band crosstalk generated in the photonic packet synchronizer that consists of a sequence of optical fiber delay lines and 2 × 2 optical switches. This paper shows that the second-order in-band crosstalk is dominant and its contribution is proportional to the square of the number of delay lines. It is found that coherent, partially coherent, and incoherent in-band crosstalk may coexist at the output of the synchronizer, causing the power penalty to vary with the delay time of the main signal. A close-form formula is derived for the mean and variance of the beating noise between the main signal and a crosstalk element. The power penalty caused by the in-band crosstalk is further numerically studied and a guideline for the requirement of the optical switches used in the synchronizer is provided.
Keywords :
laser noise; light coherence; optical crosstalk; optical delay lines; packet switching; photonic switching systems; synchronisation; beating noise; close-form formula; coherent inband crosstalk; delay time; incoherent inband crosstalk; laser phase noise; noise analysis; optical fiber delay lines; optical switches; packet synchronization; partially coherent inband crosstalk; photonic packet switching; photonic packet synchronizer; power penalty; second-order inband crosstalk; Crosstalk; Delay effects; Delay lines; Guidelines; Laser noise; Optical buffering; Optical fibers; Optical noise; Optical switches; Packet switching;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2003.822114
