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Watt-level 743 nm source by second-harmonic generation of a cascaded phosphosilicate Raman fiber amplifier

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Title: Watt-level 743 nm source by second-harmonic generation of a cascaded phosphosilicate Raman fiber amplifier
Authors: Chandran, A
Battle, RA
Murray, RT
Runcorn, T
Taylor, JR
Item Type: Journal Article
Abstract: We demonstrate a nanosecond pulsed 743 nm source through second-harmonic generation of a cascaded phosphosilicate Raman fiber amplifier system operating at 1485 nm. The amplifier is pumped by a 1240 nm phosphosilicate Raman fiber amplifier and seeded with a continuous-wave 1485 nm diode. This 1485 nm light is used for second-harmonic generation in periodically poled lithium niobate. Greater than 1 W of average power is generated at 743 nm with a corresponding pulse energy of 220 nJ at a repetition rate of 5 MHz. The source displays excellent beam quality (M2𝑥,𝑦 ≤ 1.18) with ideal parameters for biomedical imaging applications.
Issue Date: 30-Nov-2021
Date of Acceptance: 12-Nov-2021
URI: http://hdl.handle.net/10044/1/93023
DOI: 10.1364/OE.441623
ISSN: 1094-4087
Publisher: Optical Society of America (OSA)
Start Page: 41467
End Page: 41474
Journal / Book Title: Optics Express
Volume: 29
Issue: 25
Copyright Statement: © 2021. Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.
Sponsor/Funder: Engineering & Physical Science Research Council (EPSRC)
US Air Force
Funder's Grant Number: EP/K503381/1
FA9550-17-1-0197
Keywords: 0205 Optical Physics
0906 Electrical and Electronic Engineering
1005 Communications Technologies
Optics
Publication Status: Published
Online Publication Date: 2021-11-30
Appears in Collections:Physics
Photonics
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