Efficient and mode selective spatial mode multiplexer based on Multi-Plane Light Conversion
Guillaume Labroille, Bertrand Denolle, Pu Jian, Philippe Genevaux,, Nicolas Treps, Jean-Fran\c{c}ois Morizur

TL;DR
This paper presents a novel spatial mode multiplexer based on Multi-Plane Light Conversion that achieves high mode selectivity and low loss across the C-band, enabling efficient mode conversions for multiple fiber modes.
Contribution
The authors introduce a new MPLC-based multiplexer with improved efficiency and selectivity, capable of converting and multiplexing the first six eigenmodes of a few-mode fiber.
Findings
Mode selectivity better than -23 dB
Total insertion loss of -4.1 dB
Effective across the full C-band
Abstract
We designed and built a new type of spatial mode multiplexer, based on Multi-Plane Light Conversion (MPLC), with very low intrinsic loss and high mode selectivity. In this first demonstration we show that a typical 3-mode multiplexer achieves a mode selectivity better than -23 dB and a total insertion efficiency of -4.1 dB (optical coating improvements could increase efficiency to -2.4 dB), across the full C-band. Moreover this multiplexer is able to perform any mode conversion, and we demonstrate its performance for the first 6 eigenmodes of a few-mode fiber: LP, LP, LP, LP, LP and LP.
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Taxonomy
TopicsOptical Coherence Tomography Applications · Advanced Fiber Optic Sensors · Advanced Fiber Laser Technologies
