Silicon photonic integrated mode multiplexer

Demonstration of a Photonic Integrated Mode Coupler With MDM and WDM Transmission

“…The LP 11a and LP 11b mode fields are orthogonal, and rotated /2 with respect to each other in the core cross-section area. In [10], a push-pull scheme was proposed to excite the LP 11 modes where two Gaussian-like spots are used with a phase difference of , see Fig. 1(b).…”

“…In [8], the all-optical MIMO demultiplexing proposed in [9] was experimentally demonstrated. Compared to the previous works, the integrated mode couplers based on silicon-on-insulator (SOI) technology introduced in [10,11] are suitable for normal solid-core FMFs guiding LP 01 and LP 11 modes. Moreover, the mode couplers can selectively excite each mode with a high extinction ratio, thus decreasing the complexity of the digital signal processing (DSP) at the receiver, especially for the case with large differential modal delay [12].…”

“…Mode coupling efficiency (CE) based on the proposed solutions are simulated and discussed. By implementing push-pull and center launch configurations to excite LP 11 and LP 01 mode, respectively, a photonic integrated mode coupler [10] is experimentally demonstrated with three spatial modes in two polarizations encoded with 128-Gb/s 16QAM at four wavelengths for a total of 3.072Tb/s transmission over 30km of few-mode fiber.…”

Microwave Signal Processing over Multicore Fiber

“…The synergy between both disciplines will be key for the future of Microwave Photonics, where SDM fiber technologies will benefit from the implementation of integrated transceivers and interconnection elements. Up to date, research has focused on the implementation of mode multiplexers/demultiplexers for FMF transmission [29,30] and fan-in/fan-out devices for MCF transmission [29,31], including optical MIMO processing [29] as well as MCF switches towards optical add/drop multiplexers [31]. One of the main challenges here is to couple light from/to an SDM fiber efficiently to/from the facet of a silicon photonic waveguide.…”

“…One of the main challenges here is to couple light from/to an SDM fiber efficiently to/from the facet of a silicon photonic waveguide. Various solutions have been published, including one-dimensional grating couplers arranged in a triangular lattice to match the core distribution of a MCF [29], planar two-dimensional grating couplers driven in anti-phase for mode mux/demux [30], and photonic wire bonding [32].…”