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Efficient extraction of high pulse energy from partly quenched highly Er3+-doped fiber amplifiers

Efficient extraction of high pulse energy from partly quenched highly Er3+-doped fiber amplifiers
Efficient extraction of high pulse energy from partly quenched highly Er3+-doped fiber amplifiers
We demonstrate efficient pulse-energy extraction from a partly quenched erbium-doped aluminosilicate fiber amplifier. This has a high erbium concentration that allows for short devices with reduced nonlinear distortions but also results in partial quenching and thus significant unsaturable absorption, even though the fiber is still able to amplify. Although the quenching degrades the average-power efficiency, the pulse energy remains high, and our results point to an increasingly promising outcome for short pulses. Furthermore, unlike unquenched fibers, the conversion efficiency improves at low repetition rates, which we attribute to smaller relative energy loss to quenched ions at higher pulse energy. A short (2.6-m) cladding-pumped partly quenched Er-doped fiber with 95-dB/m 1530-nm peak absorption and saturation energy estimated to 85-µJ reached 0.8-mJ of output energy when seeded by 0.2-µs, 23-µJ pulses. Thus, according to our results, pulses can be amplified to high energy in short highly Er-doped fibers designed to reduce nonlinear distortions at the expense of average-power efficiency.
1094-4087
17124-17142
Rojas Hernandez, Pablo G.
0917a31d-ce16-4f07-8baa-c9c79c6f175d
Belal, Mohammad
33550de9-0df1-4c90-bae6-3eb65c62778a
Baker, Colin
831a1c76-4f4c-4ba7-b9bb-fd8e7efe357c
Pidishety, Shankar
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Feng, Yutong
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Friebele, E. Joseph
4ede2a5f-4b21-4d27-8045-6875cbc5d11c
Shaw, L. Brandon
780c4272-1db2-4d31-a6cf-b461ce7aaaf3
Rhonehouse, Daniel
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Sanghera, Jasbinder
ea6d180a-328f-469d-8546-0b4120ecfc78
Nilsson, Johan
f41d0948-4ca9-4b93-b44d-680ca0bf157b
Rojas Hernandez, Pablo G.
0917a31d-ce16-4f07-8baa-c9c79c6f175d
Belal, Mohammad
33550de9-0df1-4c90-bae6-3eb65c62778a
Baker, Colin
831a1c76-4f4c-4ba7-b9bb-fd8e7efe357c
Pidishety, Shankar
b693fa46-8454-4577-8166-6a8ae2d3f19c
Feng, Yutong
8257a816-5e4a-47bc-8aa2-e364c4d6e21e
Friebele, E. Joseph
4ede2a5f-4b21-4d27-8045-6875cbc5d11c
Shaw, L. Brandon
780c4272-1db2-4d31-a6cf-b461ce7aaaf3
Rhonehouse, Daniel
5b2575c3-3077-4729-8345-68e62b22e745
Sanghera, Jasbinder
ea6d180a-328f-469d-8546-0b4120ecfc78
Nilsson, Johan
f41d0948-4ca9-4b93-b44d-680ca0bf157b

Rojas Hernandez, Pablo G., Belal, Mohammad, Baker, Colin, Pidishety, Shankar, Feng, Yutong, Friebele, E. Joseph, Shaw, L. Brandon, Rhonehouse, Daniel, Sanghera, Jasbinder and Nilsson, Johan (2020) Efficient extraction of high pulse energy from partly quenched highly Er3+-doped fiber amplifiers. Optics Express, 28 (12), 17124-17142. (doi:10.1364/OE.385426).

Record type: Article

Abstract

We demonstrate efficient pulse-energy extraction from a partly quenched erbium-doped aluminosilicate fiber amplifier. This has a high erbium concentration that allows for short devices with reduced nonlinear distortions but also results in partial quenching and thus significant unsaturable absorption, even though the fiber is still able to amplify. Although the quenching degrades the average-power efficiency, the pulse energy remains high, and our results point to an increasingly promising outcome for short pulses. Furthermore, unlike unquenched fibers, the conversion efficiency improves at low repetition rates, which we attribute to smaller relative energy loss to quenched ions at higher pulse energy. A short (2.6-m) cladding-pumped partly quenched Er-doped fiber with 95-dB/m 1530-nm peak absorption and saturation energy estimated to 85-µJ reached 0.8-mJ of output energy when seeded by 0.2-µs, 23-µJ pulses. Thus, according to our results, pulses can be amplified to high energy in short highly Er-doped fibers designed to reduce nonlinear distortions at the expense of average-power efficiency.

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Accepted/In Press date: 14 May 2020
e-pub ahead of print date: 26 May 2020
Published date: 8 June 2020

Identifiers

Local EPrints ID: 441342
URI: http://eprints.soton.ac.uk/id/eprint/441342
ISSN: 1094-4087
PURE UUID: 6e76f792-42e3-45c7-bb9b-0cb982099ebb
ORCID for Mohammad Belal: ORCID iD orcid.org/0000-0001-5175-3158
ORCID for Yutong Feng: ORCID iD orcid.org/0000-0002-6839-2106
ORCID for Johan Nilsson: ORCID iD orcid.org/0000-0003-1691-7959

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Date deposited: 10 Jun 2020 16:30
Last modified: 08 Oct 2020 16:30

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Contributors

Author: Pablo G. Rojas Hernandez
Author: Mohammad Belal ORCID iD
Author: Colin Baker
Author: Yutong Feng ORCID iD
Author: E. Joseph Friebele
Author: L. Brandon Shaw
Author: Daniel Rhonehouse
Author: Jasbinder Sanghera
Author: Johan Nilsson ORCID iD

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