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Mode-locking and noise characteristics of InAs/InP quantum dash/dot lasers

From National Research Council Canada

DOIResolve DOI: https://doi.org/10.1109/JLT.2023.3244777
AuthorSearch for: 1ORCID identifier: https://orcid.org/0000-0002-7643-3852; Search for: 1ORCID identifier: https://orcid.org/0000-0001-5163-7640; Search for: 1ORCID identifier: https://orcid.org/0000-0002-2162-7502; Search for: 1ORCID identifier: https://orcid.org/0000-0003-1966-4491; Search for: 1; Search for: 1ORCID identifier: https://orcid.org/0000-0002-5086-2296; Search for: 1
Affiliation
  1. National Research Council Canada. Quantum and Nanotechnologies
FunderSearch for: National Research Council Canada. High Throughput and Secure Networks
FormatText, Article
Subjectcoherent comb lasers; coherent Terabit/s networking systems; integrated optics devices; quantum dash; quantum dot semiconductor mode-locked lasers; laser mode locking; semiconductor lasers; quantum dot lasers; measurement by laser beam; waveguide lasers; radio frequency; optical pulses
Abstract
The mode-locking and noise characteristics of InP/InAs quantum dash (QDash) and quantum dot (QDot) multi-wavelength lasers, showing identical structural design, operating at the C -band, are investigated and compared to each other. The QDash lasers exhibit improved repetition frequency stability with a lower threshold current and cavity loss. On the other hand, the QDot lasers show higher quality repetition frequency tunability with higher internal quantum efficiency, as well as lower average integrated relative intensity noise (RIN) and average optical linewidth. Furthermore, we demonstrate both the QDash and QDot lasers exhibit very clean constellation diagrams at 32 GBaud 16QAM base-band signal, while the QDot lasers’ bit-error ratio (BER) performance outperforms the QDashes. This finding highlights the viability of InAs/InP QDash/QDot lasers to be used as a low-cost optical source for large-scale networks.
Publication date
PublisherIEEE
In
  • Journal of Lightwave Technology 41, no. 13 (23 February 2023): 4262–4270.
LanguageEnglish
Peer reviewedYes
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Record identifier4869e860-fbb4-4567-81a0-6f6957a26470
Record created2024-10-15
Record modified2025-11-03
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