Abstract
Silicon photonic (SiPh) technology applied for optical communication systems and network-on-chips have attracted many attentions. We propose and demonstrate the use of a 4 × 4 modedivision-multiplexing (MDM) - multiplexer (MUX) and demultiplexer (DEMUX) to provide 200-Gbit/s orthogonal-frequency-division-multiplexing (OFDM) per wavelength signal transmission. The MDM MUX and DEMUX are implemented by asymmetric directional couplers (ADCs), which are constructed by an access waveguide for the transmission of fundamental mode; and the bus waveguide for the transmission of higher order modes. When phase matching condition is satisfied between the access waveguide and bus waveguide, mode conversion can be achieved. Here, 47 wavelengths are successfully mode multiplexed and de-multiplexed achieving a total transmission capacity 9.4 Tbit/s. Numerically study and analysis of the SiPh MDM MUX/DEMUX are presented, and the experimental evaluations are performed.
Highlights
Silicon photonic (SiPh) technology applied for optical communication systems and network-on-chip has attracted many attentions [1]–[3]
The TE0 modes in MDM Channel 2 (MDM-CH2), MDM Channel 3 (MDM-CH3) and MDM Channel 4 (MDM-CH4) will be converted to TE1 mode, TE2 mode and TE3 mode respectively at the MUX
The fundamental mode optical signals are launched into the MDM via focusing grating couplers (FGCs)
Summary
Silicon photonic (SiPh) technology applied for optical communication systems and network-on-chip has attracted many attentions [1]–[3]. We report a 4 × 4 MDM MUX and DEMUX to provide about 200 Gbit/s per wavelength signal transmission. 5(a) - 5(b) show the simulation results of the MDM MUX and DEMUX coupling efficiencies respectively at different wavelengths.
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