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Asymmetric Self-Coherent Detection Based on Mach-Zehnder Interferometers

We propose an asymmetric self-coherent detection scheme (ASCD) based on Mach-Zehnder interferometers (MZI) for the field reconstruction of self-coherent (SC) complex double-sideband (DSB) signals. The MZI-ASCD scheme approaches the high electrical spectral efficiency (ESE) of homodyne coherent detection via a direct detection (DD) receiver having only two photodiodes (PD) and two analog-to-digital converters. The incoming SC-DSB signal is split into two parts at the receiver in this approach, one of which is delayed and beats with the other part at the outputs of an MZI. We show that the field reconstruction can be performed from the two tributaries of photocurrents. In addition, we present a modified MZI-ASCD scheme referred to as AUX-ASCD which introduces an auxiliary DD branch to improve the SNR of the detected signal. It is found that both the MZI-ASCD scheme and the AUX-ASCD scheme achieve higher OSNR sensitivity compared to the Kramers-Kronig scheme and in the meantime increases the ESE by a factor of 2 using a cost-effective DD receiver. These advantages make the ASCD scheme attractive for short-reach optical communications including edge cloud connections and mobile X-haul systems.

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Informasi Detail

Judul Seri

JOURNAL OF LIGHTWAVE TECHNOLOGY; Vol.40 No.7 April 1 2022

No. Panggil

-

Penerbit

: .,

Deskripsi Fisik

p. 2023-2032

Bahasa

English

ISBN/ISSN

-

Klasifikasi

NONE

Tipe Isi

-

Tipe Media

-

Tipe Pembawa

-

Edisi

-

Subjek

COHERENT DETECTION
SELF-COHERENT DETECTION
INTENSITY MODULATION DIRECT DETECTION
SHORT-REACH OPTICAL COMMUNICATIONS

Info Detail Spesifik

10.1109/JLT.2021.3135000

Pernyataan Tanggungjawab

Xueyang Li, Maurice O'Sullivan, Zhenping Xing, Mohammad E. Mousa-Pasandi, David V. Plant

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