Low-loss high-speed silicon IQ modulator for QPSK/DQPSK in C and L bands

• DOI: 10.1364/oe.22.010703
• Publication Date: 2014-04-25T20:08:00Z
• Authors: Kazuhiro Goi; Akira Oka; Hiroyuki Kusaka; Yoshihiro Terada; Kensuke Ogawa; Tsung-Yang Liow; Xiaoguang Tu; Guo-Qiang Lo; Dim-Lee Kwong
• Keywords: 2. Zero hunger; Silicon; Nonlinear Dynamics; Telecommunications; 0202 electrical engineering, electronic engineering, information engineering; Fiber Optic Technology; Signal Processing, Computer-Assisted; Equipment Design; 02 engineering and technology; Signal-To-Noise Ratio

A low-loss high-speed silicon in-phase (I) quadrature (Q) modulator is designed, fabricated and characterized. The IQ has a low passive optical loss of 9 dB in C L bands. Using the modulator, differential phase-shift keying (DQPSK) transmission at 44.6 Gb/s with detection confirmed an signal-to-noise ratio (OSNR) 16.3 for bit error rate (BER) 10(-3) dispersion tolerance -96 to 107 ps/nm. Moreover, digital coherent detection, (QPSK) up 64 are achieved OSNR 11.6-11.8 BER 10(-2) 1530, 1550, 1610 nm.