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High power nanosecond pulsed fiber laser amplifiers

High power nanosecond pulsed fiber laser amplifiers
High power nanosecond pulsed fiber laser amplifiers
This project is to develop a high power nanosecond pulsed fiber laser amplifier using large mode area fibers doped with Ytterbium. It first focuses on building an all-fiber master oscillator power amplifier (MOPA) system that is capable of performing at high peak power and pulse energy with high beam quality. The performance of the MOPA then is improved in term of the usability of the output pulse with active adaptive pulse shaping. A gain-switched setup is also investigated as a 1060nm picosecond pulse source for the MOPA. Injection and self seeding are comparatively studied using the EOM-FROG technique. It is concluded that the inexpensive and simple self seeding gives similar performance compared to the expensive injection seeding using a distributed feed back laser. Pulses of 1GHz in repetition rate and 70ps in duration are produced directly from the diode. A linearly chirped Bragg fiber gratings is used to compress the pulse to below 20ps reducing the time bandwidth product from 3 to 0.7.
Vu, Khu Tri
92afad70-adcd-4a51-892b-e2b621d9b828
Vu, Khu Tri
92afad70-adcd-4a51-892b-e2b621d9b828
Richardson, David
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Malinowski, Andrew
54fd31d4-b510-4726-a8cd-33b6b2ad0427

Vu, Khu Tri (2008) High power nanosecond pulsed fiber laser amplifiers. University of Southampton, Optoelectronic Research Center, Masters Thesis, 115pp.

Record type: Thesis (Masters)

Abstract

This project is to develop a high power nanosecond pulsed fiber laser amplifier using large mode area fibers doped with Ytterbium. It first focuses on building an all-fiber master oscillator power amplifier (MOPA) system that is capable of performing at high peak power and pulse energy with high beam quality. The performance of the MOPA then is improved in term of the usability of the output pulse with active adaptive pulse shaping. A gain-switched setup is also investigated as a 1060nm picosecond pulse source for the MOPA. Injection and self seeding are comparatively studied using the EOM-FROG technique. It is concluded that the inexpensive and simple self seeding gives similar performance compared to the expensive injection seeding using a distributed feed back laser. Pulses of 1GHz in repetition rate and 70ps in duration are produced directly from the diode. A linearly chirped Bragg fiber gratings is used to compress the pulse to below 20ps reducing the time bandwidth product from 3 to 0.7.

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More information

Published date: January 2008
Organisations: University of Southampton

Identifiers

Local EPrints ID: 54019
URI: http://eprints.soton.ac.uk/id/eprint/54019
PURE UUID: 4b558c0d-ec0f-4992-a683-907e690f1079
ORCID for David Richardson: ORCID iD orcid.org/0000-0002-7751-1058

Catalogue record

Date deposited: 07 Nov 2008
Last modified: 14 Mar 2019 01:54

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Contributors

Author: Khu Tri Vu
Thesis advisor: David Richardson ORCID iD
Thesis advisor: Andrew Malinowski

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