Optical-Mode Demultiplexing by Optical MIMO Filtering of Spatial Samples
Author:
- 6 April 2012
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Photonics Technology Letters
- Vol. 24 (12) , 1045-1047
Abstract
An optical spatial-mode demultiplexer is proposed consisting of an optical sampler taking probes from the aperture of the multimode fiber, which are then launched into an optical multiple-input multiple-output (MIMO) filter. A theoretical analysis of coupler matrices of three sampler options reveals that samplers can be characterized by a mode-dependent sampling loss and sampling crosstalk arising from a lacking orthogonality of sampling vectors of different modes. The theoretical optimum MIMO allpass filter can be realized by a waveguide structure consisting of cascaded and in parallel operating directional couplers. The multiplexer is scalable to higher mode numbers due to the absence of splitting loss.Keywords
This publication has 8 references indexed in Scilit:
- Low-Loss Mode Coupler for Mode-Multiplexed transmission in Few-Mode Fiber2012
- Mode-Division Multiplexing of 2$\,\times\,$100 Gb/s Channels Using an LCOS-Based Spatial ModulatorJournal of Lightwave Technology, 2011
- Dual-LP_11 mode 4x4 MIMO-OFDM transmission over a two-mode fiberOptics Express, 2011
- 6×56-Gb/s mode-division multiplexed transmission over 33-km few-mode fiber enabled by 6×6 MIMO equalizationOptics Express, 2011
- Multimode fiber amplifier with tunable modal gain using a reconfigurable multimode pumpOptics Express, 2011
- Silicon photonic integrated circuit for coupling to a ring-core multimode fiber for space-division multiplexing2011
- Coherent Multimode-Fiber MIMO Transmission with Spatial Constellation Modulation2011
- Stable coherent MIMO transport over few mode fiber enabled by an adiabatic mode splitter2010