Title :
Routing characteristics of 40–100Gbps pulse trains by weighted collinear acoustooptic devices
Author :
Goto, Nasato ; Miyazaki, Yuji
Author_Institution :
Dept. of Opt. Sci. & Technol., Univ. of Tokushima, Tokushima, Japan
Abstract :
Optical switching of high-bit-rate QPSK pulse trains using collinear acoustooptic (AO) devices is theoretically discussed. Since the collinear AO devices have wavelength selectivity, the switched optical pulse trains suffer from distortion when the bandwidth of the pulse train is comparable to the pass bandwidth of the AO device. As the AO device, a sidelobe-suppressed device with a tapered surface-acoustic-wave (SAW) waveguide and a Butterworth-type filter device with a lossy SAW directional coupler are considered. Phase distortion of optical pulse trains at 40 to 100Gsymbol/s in quadrature phase-shift-keying format is numerically analyzed.
Keywords :
Butterworth filters; acousto-optical modulation; acousto-optical switches; optical communication equipment; optical directional couplers; optical distortion; quadrature phase shift keying; surface acoustic wave waveguides; Butterworth-type filter device; SAW waveguide; bit rate 40 Gbit/s to 100 Gbit/s; collinear AO devices; high-bit-rate QPSK pulse trains; lossy SAW directional coupler; optical switching; pass bandwidth; phase distortion; quadrature phase-shift-keying format; routing; sidelobe-suppressed device; switched optical pulse trains; tapered surface-acoustic-wave waveguide; wavelength selectivity; weighted collinear acoustooptic devices; Optical distortion; Optical filters; Optical pulses; Optical switches; Optical waveguides; Surface acoustic waves; acoustooptic effect; optical QPSK pulses;
Conference_Titel :
Ultrasonics Symposium (IUS), 2012 IEEE International
Conference_Location :
Dresden
Print_ISBN :
978-1-4673-4561-3
DOI :
10.1109/ULTSYM.2012.0618
