Influence of average cavity dispersion and spectral bandwidth on passively harmonic mode locked L-band Er-doped fiber laser

Abstract

We systematically study the impact of average cavity dispersion and pulse spectral bandwidth on harmonic mode locking in the long-wavelength band from an Er-doped fiber laser using carbon nanotubes polyvinyl alcohol (CNTs-PVA) film mode locker. By carrying out pulse energy management through optimizing the average cavity dispersion and optical spectral bandwidth, 2.08 GHz repetition rate corresponding to 201 st harmonic with 36.5 dB side mode suppression ratio (SMSR) can be realized under 205 mW pump power at 1597.53 nm. Furthermore, we systematically investigate the characteristics of the harmonically mode locked ultrashort optical pulses with different spectral bandwidths versus pump power under fixed cavity dispersion first. Key laser parameters have been studied including pumping efficiency, duration, energy, SMSR, and time bandwidth product. Enlightened by the experimental results, a simple law on preliminary and fast judgment of pulses frequency under fixed pump power is proposed, namely, by monitoring the pulse spectral bandwidth. The laser source featuring high repetition rate and L-band operation is greatly sought-after in some specific applications such as modern optical communication system etc.

Publication DOI: https://doi.org/10.1109/JSTQE.2019.2924869
Divisions: College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
College of Engineering & Physical Sciences > School of Informatics and Digital Engineering > Electrical and Electronic Engineering
College of Engineering & Physical Sciences
Additional Information: © 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Uncontrolled Keywords: Fiber lasers,laser mode locking,nanomaterials,Ceramics and Composites,Atomic and Molecular Physics, and Optics,Materials Chemistry,Electrical and Electronic Engineering
Publication ISSN: 1558-4542
Full Text Link:
Related URLs: https://ieeexpl ... cument/8747448/ (Publisher URL)
http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2019-07-01
Published Online Date: 2019-06-27
Accepted Date: 2019-06-01
Authors: Huang, Qianqian
Zou, Chuanhang
Wang, Tianxing
Al Araimi, Mohammed
Rozhin, Aex (ORCID Profile 0000-0003-2271-8227)
Mou, Chengbo

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