Self-Locking of Free-Running DFB Lasers to a Single Microring Resonator for Dense WDM

Yonghang Sun; James Salamy; Caitlin E. Murray; Xiaotian Zhu; Brent E. Little; Roberto Morandotti; Arnan Mitchell; Sai T. Chu; David J. Moss; Bill Corcoran

doi:10.1109/JLT.2024.3494694

Self-Locking of Free-Running DFB Lasers to a Single Microring Resonator for Dense WDM

Yonghang Sun^*
, James Salamy
, Caitlin E. Murray
, Xiaotian Zhu
, Brent E. Little
, Roberto Morandotti
, Arnan Mitchell
, Sai T. Chu
, David J. Moss
, Bill Corcoran

^*Corresponding author for this work

Department of Physics

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

Abstract

We self-injection locked two free-running DFB lasers to two adjacent resonances of microring resonators (MRRs) to enhance the lasers frequency spacing stability. The frequency spacing stability between the two locked lasers was <300MHz while locking to a ∼0.5 million Q microring with ∼ 19.6GHz free spectral range (FSR), improving to <100MHz level after locking to a ∼1.5 million Q microring with ∼ 25.2GHz FSR. The locked lasers were modulated with dual polarisation 16-QAM signals with <1GHz guard-band between two channels, and the MRR locked DFB lasers achieved similar performance to commercial external cavity lasers in the coherent communication system © 2024 IEEE.

Original language	English
Pages (from-to)	1995-2002
Journal	Journal of Lightwave Technology
Volume	43
Issue number	4
Online published	8 Nov 2024
DOIs	https://doi.org/10.1109/JLT.2024.3494694
Publication status	Published - 15 Feb 2025

Research Keywords

coherent communication
dense WDM
DFB
distributed feedback laser
DWDM
ECL
external cavity laser
microring resonator
MRR
Optical injection locking
self-injection locking
uDWDM
ultra-dense WDM
wavelength division multiplexing
WDM

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@article{540175d23339451490f16854a65ca3a7,

title = "Self-Locking of Free-Running DFB Lasers to a Single Microring Resonator for Dense WDM",

abstract = "We self-injection locked two free-running DFB lasers to two adjacent resonances of microring resonators (MRRs) to enhance the lasers frequency spacing stability. The frequency spacing stability between the two locked lasers was <300MHz while locking to a ∼0.5 million Q microring with ∼ 19.6GHz free spectral range (FSR), improving to <100MHz level after locking to a ∼1.5 million Q microring with ∼ 25.2GHz FSR. The locked lasers were modulated with dual polarisation 16-QAM signals with <1GHz guard-band between two channels, and the MRR locked DFB lasers achieved similar performance to commercial external cavity lasers in the coherent communication system {\textcopyright} 2024 IEEE.",

keywords = "coherent communication, dense WDM, DFB, distributed feedback laser, DWDM, ECL, external cavity laser, microring resonator, MRR, Optical injection locking, self-injection locking, uDWDM, ultra-dense WDM, wavelength division multiplexing, WDM",

author = "Yonghang Sun and James Salamy and Murray, \{Caitlin E.\} and Xiaotian Zhu and Little, \{Brent E.\} and Roberto Morandotti and Arnan Mitchell and Chu, \{Sai T.\} and Moss, \{David J.\} and Bill Corcoran",

year = "2025",

month = feb,

day = "15",

doi = "10.1109/JLT.2024.3494694",

language = "English",

volume = "43",

pages = "1995--2002",

journal = "Journal of Lightwave Technology",

issn = "0733-8724",

publisher = "IEEE",

number = "4",

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TY - JOUR

T1 - Self-Locking of Free-Running DFB Lasers to a Single Microring Resonator for Dense WDM

AU - Sun, Yonghang

AU - Salamy, James

AU - Murray, Caitlin E.

AU - Zhu, Xiaotian

AU - Little, Brent E.

AU - Morandotti, Roberto

AU - Mitchell, Arnan

AU - Chu, Sai T.

AU - Moss, David J.

AU - Corcoran, Bill

PY - 2025/2/15

Y1 - 2025/2/15

N2 - We self-injection locked two free-running DFB lasers to two adjacent resonances of microring resonators (MRRs) to enhance the lasers frequency spacing stability. The frequency spacing stability between the two locked lasers was <300MHz while locking to a ∼0.5 million Q microring with ∼ 19.6GHz free spectral range (FSR), improving to <100MHz level after locking to a ∼1.5 million Q microring with ∼ 25.2GHz FSR. The locked lasers were modulated with dual polarisation 16-QAM signals with <1GHz guard-band between two channels, and the MRR locked DFB lasers achieved similar performance to commercial external cavity lasers in the coherent communication system © 2024 IEEE.

AB - We self-injection locked two free-running DFB lasers to two adjacent resonances of microring resonators (MRRs) to enhance the lasers frequency spacing stability. The frequency spacing stability between the two locked lasers was <300MHz while locking to a ∼0.5 million Q microring with ∼ 19.6GHz free spectral range (FSR), improving to <100MHz level after locking to a ∼1.5 million Q microring with ∼ 25.2GHz FSR. The locked lasers were modulated with dual polarisation 16-QAM signals with <1GHz guard-band between two channels, and the MRR locked DFB lasers achieved similar performance to commercial external cavity lasers in the coherent communication system © 2024 IEEE.

KW - coherent communication

KW - dense WDM

KW - DFB

KW - distributed feedback laser

KW - DWDM

KW - ECL

KW - external cavity laser

KW - microring resonator

KW - MRR

KW - Optical injection locking

KW - self-injection locking

KW - uDWDM

KW - ultra-dense WDM

KW - wavelength division multiplexing

KW - WDM

UR - https://www.scopus.com/pages/publications/85209130479

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85209130479&origin=recordpage

U2 - 10.1109/JLT.2024.3494694

DO - 10.1109/JLT.2024.3494694

M3 - RGC 21 - Publication in refereed journal

SN - 0733-8724

VL - 43

SP - 1995

EP - 2002

JO - Journal of Lightwave Technology

JF - Journal of Lightwave Technology

IS - 4

ER -

Self-Locking of Free-Running DFB Lasers to a Single Microring Resonator for Dense WDM

Abstract

Research Keywords

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