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A low-loss and low-crosstalk Mach-Zehnder mode/wavelength multi/demultiplexer based on silica-PLC platform is proposed for WDM/MDM transmission. The Mach-Zehnder filter for “mode” and “wavelength” can be constructed by newly designed broadband 3dB-mode-divider. Furthermore, using Si/silica hybrid platform, footprint of the chip can be drastically reduced.
Two types of low-loss and broadband mode (de)multiplexer based on PLC are designed and fabricated. Multiplex/demultiplex of LP01 and LP11 modes is achieved with a low loss over a wide wavelength range.
Since 2008, we have been developing the integrated SoC (System-On-Chip), which incorporates the ultra-high-speed multi-level QAM modem, multiple connection type MAC (Media Access Control) and also the Gigabit Ethernet interface, in a bid to adapt to the quasi-millimeter wave broadband wireless system. In 2009, we developed the SoC for the WT (remote side Wireless Terminal on P-MP (Point-to-Multi-Point)...
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