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All-fiber 1.15 mJ pulsed eye-safe optical source

All-fiber 1.15 mJ pulsed eye-safe optical source
All-fiber 1.15 mJ pulsed eye-safe optical source
High power pulsed fiber lasers and amplifiers based on Er or Er-Yb fibers have received much attention in recent years due to advantages such as compactness, efficiency, relative eye safety, high brightness, and compatibility with telecom components at 1550 nm. Applications such as lidar also benefit from a low weight. A seed source, followed by a cascade of erbium-doped fiber amplifiers, are an attractive means to this end, providing for a compact, reliable, and versatile system. So far, however, pulse energies achieved with such amplifier cascades have been significantly less than 1 mJ.

Here, we report a MOPA (master oscillator-power amplifier) optical fiber source with a record pulse energy of 1.15 mJ at low repetition rates in a high-brightness beam (M2 = 1.6). Maximum average output power was 2.2 W. The wavelength of operation was 1562 nm and the repetition rate was 0.8-10 kHz. The pulse duration varied between 50 and 500 ns. Our fiber MOPA source consisted of an actively Q-switched erbium-ytterbium codoped fiber ring laser spliced to a high-power cladding-pumped multimode Er-Yb co-doped fiber amplifier. High-brightness operation (with suppression of unwanted modes) was obtained through spatial mode-selection. Additional results with different seed sources and at higher powers will be presented at the conference.
0819455733
284-288
Philippov, V.
221920b3-e4c6-4695-9567-33480372fbf8
Sahu, Jayanta
009f5fb3-6555-411a-9a0c-9a1b5a29ceb2
Codemard, C.
71812eb8-df24-410b-a0dc-d1c40520d160
Clarkson, W.A.
3b060f63-a303-4fa5-ad50-95f166df1ba2
Jang, J.N.
7d327151-c4a7-44a8-8177-528e0bad6af6
Nilsson, J.
f41d0948-4ca9-4b93-b44d-680ca0bf157b
Pearson, G.N.
935f1179-dc5e-42f5-99ab-110c0ef728f8
Philippov, V.
221920b3-e4c6-4695-9567-33480372fbf8
Sahu, Jayanta
009f5fb3-6555-411a-9a0c-9a1b5a29ceb2
Codemard, C.
71812eb8-df24-410b-a0dc-d1c40520d160
Clarkson, W.A.
3b060f63-a303-4fa5-ad50-95f166df1ba2
Jang, J.N.
7d327151-c4a7-44a8-8177-528e0bad6af6
Nilsson, J.
f41d0948-4ca9-4b93-b44d-680ca0bf157b
Pearson, G.N.
935f1179-dc5e-42f5-99ab-110c0ef728f8

Philippov, V., Sahu, Jayanta, Codemard, C., Clarkson, W.A., Jang, J.N., Nilsson, J. and Pearson, G.N. (2004) All-fiber 1.15 mJ pulsed eye-safe optical source. SPIE 5620 : Photonics West 2004: Solid State Laser Technologies and Femtosecond Phenomena. 25 - 31 Jan 2004. pp. 284-288 . (doi:10.1117/12.527451).

Record type: Conference or Workshop Item (Paper)

Abstract

High power pulsed fiber lasers and amplifiers based on Er or Er-Yb fibers have received much attention in recent years due to advantages such as compactness, efficiency, relative eye safety, high brightness, and compatibility with telecom components at 1550 nm. Applications such as lidar also benefit from a low weight. A seed source, followed by a cascade of erbium-doped fiber amplifiers, are an attractive means to this end, providing for a compact, reliable, and versatile system. So far, however, pulse energies achieved with such amplifier cascades have been significantly less than 1 mJ.

Here, we report a MOPA (master oscillator-power amplifier) optical fiber source with a record pulse energy of 1.15 mJ at low repetition rates in a high-brightness beam (M2 = 1.6). Maximum average output power was 2.2 W. The wavelength of operation was 1562 nm and the repetition rate was 0.8-10 kHz. The pulse duration varied between 50 and 500 ns. Our fiber MOPA source consisted of an actively Q-switched erbium-ytterbium codoped fiber ring laser spliced to a high-power cladding-pumped multimode Er-Yb co-doped fiber amplifier. High-brightness operation (with suppression of unwanted modes) was obtained through spatial mode-selection. Additional results with different seed sources and at higher powers will be presented at the conference.

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More information

e-pub ahead of print date: 2004
Venue - Dates: SPIE 5620 : Photonics West 2004: Solid State Laser Technologies and Femtosecond Phenomena, 2004-01-25 - 2004-01-31

Identifiers

Local EPrints ID: 41752
URI: https://eprints.soton.ac.uk/id/eprint/41752
ISBN: 0819455733
PURE UUID: 3ebf2d8f-986c-4ea0-84ee-6e732c9356e4
ORCID for J. Nilsson: ORCID iD orcid.org/0000-0003-1691-7959

Catalogue record

Date deposited: 19 Oct 2006
Last modified: 03 Dec 2019 01:56

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