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Polarization-Insensitive Monolithic 40-Gbps SOA–MZI Wavelength Converter With Narrow Active Waveguides

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10 Author(s)
Tatsuo Hatta ; Inf. Technol. Res. & Dev. Center, Mitsubishi Electr. Corp., Hyogo ; Toshiharu Miyahara ; Yasunori Miyazaki ; Kazuhisa Takagi
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A polarization-insensitive monolithic 40-Gbps semiconductor optical amplifier (SOA)-Mach-Zehnder interferometer wavelength converter has been developed. Based on the photon-electron rate equation, we optimized the dimensions of the waveguide structure to maximize the field confinement in the active layer. An InGaAsP active layer with narrow SOA waveguide effectively enables polarization-insensitive high-speed wavelength conversion. High-precision wafer processing technique enabled the fabrication of submicrometer-wide active waveguides with low current leakage. Input waveguide arrays were fabricated at intervals of 25 mum and mounted in a module with two-lens aspherical lens optics. The 40-Gbps nonreturn-to-zero wavelength conversion experiment demonstrates a clear eye opening over full C-band operation

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IEEE Journal of Selected Topics in Quantum Electronics  (Volume:13 ,  Issue: 1 )