Title :
Impact of the phase noise generated from semiconductor optical amplifiers on the size of optical space switches
Author_Institution :
Dept. of Electr. & Comput. Eng., Inst. Superior Tecnico, Lisbon, Portugal
Abstract :
Optical space switch matrices can be designed by interconnecting properly multiple 2×2 switches based on semiconductor optical amplifiers (SOAs). The size of these switching structures is limited by many phenomena, including phase noise generated by SOAs, which can be a serious drawback if coherent modulation schemes are used in the network. This paper examines this problem, for a DPSK direct detection system. It is found that there is an optimum level for the switch input power, and the phase noise limits the number of 2×2 switches, which can be cascaded, to about 200, for a bit rate in the gigabit/s range
Keywords :
differential phase shift keying; laser noise; optical modulation; optical signal detection; phase noise; photonic switching systems; semiconductor lasers; DPSK direct detection system; bit rate; coherent modulation; optical space switch matrices; phase noise generation; semiconductor optical amplifiers; switch input power; switching structures; Differential quadrature phase shift keying; Optical design; Optical interconnections; Optical modulation; Optical noise; Optical switches; Phase modulation; Phase noise; Semiconductor optical amplifiers; Stimulated emission;
Conference_Titel :
Global Telecommunications Conference, 1995. GLOBECOM '95., IEEE
Print_ISBN :
0-7803-2509-5
DOI :
10.1109/GLOCOM.1995.502776
