The University of Southampton
University of Southampton Institutional Repository

Development of the synchronously pumped optical parametric oscillator

Development of the synchronously pumped optical parametric oscillator
Development of the synchronously pumped optical parametric oscillator
An investigation was made into the feasibility of using the synchronously pumped optical parametric oscillator (SPOPO) as a source of subnanosecond pulses tunable across the near- and mid-infrared. Two devices were developed, based on relatively new nonlinear crystals that had not previously been used as gain media in SPOPOs. Optical parametric oscillation, synchronously pumped by the amplified and then frequency doubled output from an actively mode locked and Q-switched Nd:YAG laser, was first achieved in beta-barium borate (BBO) and then in potassium titanyl phosphate (KTP). The BBO oscillator produced broadly tunable pulses covering ~0.68 to 2.4 µm, but its large double refraction walk-off angle, and critical phase matching, precluded tight pump beam focusing in the crystal, and this led to a high threshold peak pump intensity of ~2.2 GWcm-2 . The XTP crystal, used in the second SPOPO, allowed for non-critical phase matching, and had a higher nonlinear coefficient and smaller walk-off than BBO, and this gave a much lower threshold of ~650 MWcm-2 (but limited tuning from ~1.04 to 1.09 µm). Both devices converted up to ~ 30% of the pump energy to generate ~ 75 ps parametric pulses.
Bromley, Leigh John
508c4787-e76d-409e-bf2d-112e7b24bf33
Bromley, Leigh John
508c4787-e76d-409e-bf2d-112e7b24bf33
Hanna, David
3da5a5b4-71c2-4441-bb67-21f0d28a187d

Bromley, Leigh John (1990) Development of the synchronously pumped optical parametric oscillator. University of Southampton, Faculty of Science, Physics Department, Doctoral Thesis, 215pp.

Record type: Thesis (Doctoral)

Abstract

An investigation was made into the feasibility of using the synchronously pumped optical parametric oscillator (SPOPO) as a source of subnanosecond pulses tunable across the near- and mid-infrared. Two devices were developed, based on relatively new nonlinear crystals that had not previously been used as gain media in SPOPOs. Optical parametric oscillation, synchronously pumped by the amplified and then frequency doubled output from an actively mode locked and Q-switched Nd:YAG laser, was first achieved in beta-barium borate (BBO) and then in potassium titanyl phosphate (KTP). The BBO oscillator produced broadly tunable pulses covering ~0.68 to 2.4 µm, but its large double refraction walk-off angle, and critical phase matching, precluded tight pump beam focusing in the crystal, and this led to a high threshold peak pump intensity of ~2.2 GWcm-2 . The XTP crystal, used in the second SPOPO, allowed for non-critical phase matching, and had a higher nonlinear coefficient and smaller walk-off than BBO, and this gave a much lower threshold of ~650 MWcm-2 (but limited tuning from ~1.04 to 1.09 µm). Both devices converted up to ~ 30% of the pump energy to generate ~ 75 ps parametric pulses.

Full text not available from this repository.

More information

Published date: 1990
Organisations: University of Southampton, Optoelectronics Research Centre, Quantum, Light & Matter Group

Identifiers

Local EPrints ID: 404739
URI: https://eprints.soton.ac.uk/id/eprint/404739
PURE UUID: b2a2e4dd-a37f-4631-85c2-e9f31620428d

Catalogue record

Date deposited: 18 Feb 2017 00:24
Last modified: 13 Mar 2019 20:18

Export record

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of https://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×