Performance enhancement of an ultrafast all-fiber laser based on an InN saturable absorber using GRIN coupling
Authors
Monroy Lafuente, Laura; Soriano Amat, Miguel; Esteban Martinez, Óscar; Monroy, Eva; González Herráez, Miguel; [et al.]Publisher
Optica Publishing Group
Date
2021-08-26Funders
Agencia Estatal de Investigación
Comunidad de Madrid
Bibliographic citation
Monroy Lafuente, L., Soriano Amat, M., Esteban, O., Monroy, E., González Herráez, M. & Naranjo Vega, F.B. 2021, "Performance enhancement of an ultrafast all-fiber laser based on an InN saturable absorber using GRIN coupling", Optics Express, vol. 29, no. 18, pp. 29357-29365.
Keywords
Mode-locking
All-fiber laser
Saturable absorber
Project
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-097957-B-C31/ES/INGENIERIA DE SEÑALES OPTICAS COMPLEJAS PARA SISTEMAS DE FIBRA OPTICA MAS ALLA DE LA TELECOMUNICACION/
info:eu-repo/grantAgreement/CAM//S2018%2FNMT4326/ES/SENSORES E INSTRUMENTACION EN TECNOLOGIAS FOTONICAS2/SINFOTON2
Document type
info:eu-repo/semantics/article
Version
info:eu-repo/semantics/publishedVersion
Publisher's version
https://doi.org/10.1364/OE.430198Rights
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
© 2021 Optical Society of America
Access rights
info:eu-repo/semantics/openAccess
Abstract
Indium nitride (InN)-based semiconductor saturable absorbers have previously shown
advantages for application in near-IR fiber lasers due to their broad modulation depth, ultrafast nonlinear response and thermal stability. However, up to now all demonstrated saturable absorber elements based on InN (either transmissive or reflective) have shown limited performance due to poor coupling and insertion losses. We present here a simple mode-locking device based on a GRIN-rod lens in conjunction with an InN semiconductor saturable absorber mirror (SESAM) for its use in a passively mode-locked all-fiber laser system operating at telecom wavelengths. Our results demonstrate that this coupling element ensures not only a compact, turnkey and alignment-free design but also a highly-stable optical femtosecond pulse train. The reduction of insertion losses (3.5 dB) enables the generation of 90-fs ultrafast pulses with an average power of 40mW and up to 7 nJ of pulse energy without the need for additional amplification.
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