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Impulse Response Characterization of a Commercial Multimode Fiber Using Superconducting Nanowire Single-Photon Detectors

Time-of-flight measurements are key to study distributed mode coupling and differential mode group delay (DMDG) in multimode fibers (MMFs). However, current approaches using regular photodetectors with limited sensitivity preclude the detection of weak modal interactions in such fibers masking interesting physical effects. Here we demonstrate the use of high-sensitivity superconducting nanowire single-photon detectors (SNSPDs) to measure the mode transfer matrix of a commercial graded-index multimode fiber. Two high performance 45-mode multi-plane light conversion (MPLC) devices served as the mode multiplexer/demultiplexer. Distributed mode coupling and DMDG among different mode groups are accurately quantified from the impulse response measurement. We also observed cladding modes of the MMF as a pedestal of the pulse in the measurement. This work paves the way for applications such as quantum communications using many spatial modes of the fiber.

Ketersediaan

Informasi Detail

Judul Seri

JOURNAL OF LIGHTWAVE TECHNOLOGY; Vol.40 No.15 August 1 2022

No. Panggil

-

Penerbit

: .,

Deskripsi Fisik

p. 5107-5117

Bahasa

English

ISBN/ISSN

-

Klasifikasi

NONE

Tipe Isi

-

Tipe Media

-

Tipe Pembawa

-

Edisi

-

Subjek

TRANSFER MATRIX
IMPULSE RESPONSE
MULTI-PLANE LIGHT CONVERSION (MPLC)
DIFFERENTIAL MODE GROUP DELAY (DMGD)
DISTRIBUTED MODE COUPLING

Info Detail Spesifik

DOI: 10.1109/JLT.2022.3172239

Pernyataan Tanggungjawab

Yuanhang Zhang, Nicolas K. Fontaine, Mikael Mazur, Haoshuo Chen, Roland Ryf, Guifang Li, Andrea Blanco-Redondo

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