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Characterization of a multifunctional active demultiplexer for optical frequency combs

Lakshmijayasimha, Prajwal ORCID: 0000-0002-3381-3337, Kaszubowska-Anandarajah, Aleksandra ORCID: 0000-0003-4811-9273, Martin, Eamonn ORCID: 0000-0002-1720-4531, Hammad, Mohab, Landais, Pascal ORCID: 0000-0002-4807-0695 and Anandarajah, Prince M. ORCID: 0000-0001-7335-8044 (2020) Characterization of a multifunctional active demultiplexer for optical frequency combs. Optics and Laser Technology, 134 . ISSN 0030-3992

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Abstract

We report on a multifunctional active demultiplexer for optical frequency combs. The proposed technique, based on injection locking, combines the functionality of a tunable demultiplexer, gain equalizer and an optical amplifer, all in one device. Validation of the concept is experimentally demonstrated through simultaneous demultiplexing and amplifcation of combs with various free spectral ranges (2.5 to 15 GHz), achieving an adjacent channel suppression ratio > 35 dB and an output power of 7.5 dBm. The functionality of the demultiplexer is extended to that of a gain equalizer, by fltering comb tones with powers 10 dB below the spectral peak, whilst maintaining a suppression ratio > 30 dB and a constant output power. This feature increases the number of comb lines suited for data modulation (i.e. usable lines), by a factor of ~1.7. Finally, we test the stability of such a demultiplexer, by measuring the frequency drift, beat tone power variations and phase correlation between demultiplexed tones.

Item Type:Article (Published)
Refereed:Yes
Additional Information:Article number: 106637
Subjects:Engineering > Optical communication
Engineering > Signal processing
Physical Sciences > Photonics
Physical Sciences > Semiconductors
DCU Faculties and Centres:DCU Faculties and Schools > Faculty of Engineering and Computing > School of Electronic Engineering
Research Initiatives and Centres > Research Institute for Networks and Communications Engineering (RINCE)
Publisher:Elsevier
Official URL:https://doi.org/10.1016/j.optlastec.2020.106637
Copyright Information:© 2020 The Authors. Open Access (CC-BY 4.0)
Funders:Science Foundation Ireland (SFI) 15/CDA/3640. Financial support by SFI 17/IFB/5385, the SFI/European Regional Development Fund (13/RC/2077) and DT2018 0268
ID Code:27067
Deposited On:26 Apr 2022 14:41 by Pascal Landais . Last Modified 22 Aug 2022 16:03

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