Low-loss high-speed silicon IQ modulator for QPSK/DQPSK in C and L bands.
Open Access
- 25 April 2014
- journal article
- Published by Optica Publishing Group in Optics Express
- Vol. 22 (9) , 10703-10709
- https://doi.org/10.1364/oe.22.010703
Abstract
A low-loss high-speed silicon in-phase (I) quadrature (Q) modulator is designed, fabricated and characterized. The fabricated IQ modulator has a low passive optical loss of 9 dB in C and L bands. Using the modulator, differential quadrature phase-shift keying (DQPSK) transmission at 44.6 Gb/s with differential detection is confirmed with an optical signal-to-noise ratio (OSNR) of 16.3 dB for a bit error rate (BER) of 10−3 and a dispersion tolerance of −96 to 107 ps/nm. Moreover, in digital coherent detection, quadrature phase-shift keying (QPSK) up to 64 Gb/s are achieved with an OSNR of 11.6–11.8 dB for a BER of 10−2 at 1530, 1550, and 1610 nm.Keywords
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