Silicon photonic waveguide nested Mach-Zehnder modulators having rib-waveguide planar P-N junction phase shifters are fabricated and characterized in constellation and transmittance measurements. 20-Gbps QPSK constellation is observed with optical loss lower than 15 dB at wavelengths of 1550 and 1590 nm.
© 2012 OSA
K. Ogawa, K. Goi, H. Kusaka, K. Oda, T. Liow, X. Tu, G. Lo, and D. Kwong, "20-Gbps Silicon Photonic Waveguide Nested Mach-Zehnder QPSK Modulator," in National Fiber Optic Engineers Conference, OSA Technical Digest (Optical Society of America, 2012), paper JTh2A.20.
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