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All-fiber saturable absorber based on nonlinear multimode interference with enhanced modulation depth

All-fiber saturable absorber based on nonlinear multimode interference with enhanced modulation depth
All-fiber saturable absorber based on nonlinear multimode interference with enhanced modulation depth
We experimentally demonstrate a passively modelocked fiber ring laser using a small-core fiber –graded index multimode fiber – single mode fiber (SCF-GIMMF-SMF) structure as an effective saturable absorber (SA) based on nonlinear multimode interference (NL-MMI) effect. A small-core fiber is used as an input
single mode fiber to improve coupling of power into higher-order modes in a multimode fiber and to enhance the modulation depth of the structure. Stable fundamental mode-locked operation is obtained at a pump threshold of 166 mW and the output soliton pulses have 647 fs duration at 1557.96 nm with a 5.2
nm spectral width at a repetition rate of 19.37 MHz. This NL-MMI SA can be applied to high-power modelocked fiber lasers owing to its inherent high damage threshold, compact size, wavelength independent operation
and fabrication simplicity.
1559-128X
Wang, Teng
b2bf87c8-62eb-4c43-935d-b55f5a2a9ed2
Jung, Yongmin
6685e51e-be47-4c96-8c4b-65aee3b5126d
Horak, Peter
520489b5-ccc7-4d29-bb30-c1e36436ea03
Zeng, Xianglong
13d3a25a-4d77-44c0-980a-6a7c575e5633
Richardson, David
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Wang, Teng
b2bf87c8-62eb-4c43-935d-b55f5a2a9ed2
Jung, Yongmin
6685e51e-be47-4c96-8c4b-65aee3b5126d
Horak, Peter
520489b5-ccc7-4d29-bb30-c1e36436ea03
Zeng, Xianglong
13d3a25a-4d77-44c0-980a-6a7c575e5633
Richardson, David
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3

Wang, Teng, Jung, Yongmin, Horak, Peter, Zeng, Xianglong and Richardson, David (2021) All-fiber saturable absorber based on nonlinear multimode interference with enhanced modulation depth. Applied Optics. (Submitted)

Record type: Article

Abstract

We experimentally demonstrate a passively modelocked fiber ring laser using a small-core fiber –graded index multimode fiber – single mode fiber (SCF-GIMMF-SMF) structure as an effective saturable absorber (SA) based on nonlinear multimode interference (NL-MMI) effect. A small-core fiber is used as an input
single mode fiber to improve coupling of power into higher-order modes in a multimode fiber and to enhance the modulation depth of the structure. Stable fundamental mode-locked operation is obtained at a pump threshold of 166 mW and the output soliton pulses have 647 fs duration at 1557.96 nm with a 5.2
nm spectral width at a repetition rate of 19.37 MHz. This NL-MMI SA can be applied to high-power modelocked fiber lasers owing to its inherent high damage threshold, compact size, wavelength independent operation
and fabrication simplicity.

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AO-revised paper-V4 - Author's Original
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Submitted date: 2021

Identifiers

Local EPrints ID: 451332
URI: http://eprints.soton.ac.uk/id/eprint/451332
ISSN: 1559-128X
PURE UUID: e9050de5-4ea9-4fc5-9907-9e2253db979e
ORCID for Yongmin Jung: ORCID iD orcid.org/0000-0002-9054-4372
ORCID for Peter Horak: ORCID iD orcid.org/0000-0002-8710-8764
ORCID for David Richardson: ORCID iD orcid.org/0000-0002-7751-1058

Catalogue record

Date deposited: 21 Sep 2021 16:31
Last modified: 31 Oct 2021 05:01

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Contributors

Author: Teng Wang
Author: Yongmin Jung ORCID iD
Author: Peter Horak ORCID iD
Author: Xianglong Zeng

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