The University of Southampton
University of Southampton Institutional Repository

Feedback-controlled prelasing: a technique for pulse amplitude and frequency stabilisation of Q-switched lasers

Feedback-controlled prelasing: a technique for pulse amplitude and frequency stabilisation of Q-switched lasers
Feedback-controlled prelasing: a technique for pulse amplitude and frequency stabilisation of Q-switched lasers
A reliable single-frequency Q-switched laser with high pulse repetition frequency (PRF) and good pulse to pulse stability is desirable for many applications, including those where a high average power is required. One popular approach for obtaining single-frequency operation of Q-switched lasers is to use the technique of prelase Q-switching, where a low power single-frequency oscillation is established prior to opening the Q-switch. In practice this technique has been limited to low PRFs (typically < or = 1kHz) since the prelase usually begins with strong spiking behaviour followed by relaxation oscillations. These take a time to decay to the steady prelase required for reliable single-frequency operation and high pulse to pulse stability. At high PRFs, when the Q-switched pulse builds up from prelase spikes, large fluctuations in pulse amplitude and excessive timing jitter occur. In this paper we report a new technique involving actively controlling the diffraction loss of the Q-switch, so as to damp out spiking and relaxation oscillation. We have applied this technique to a Nd:YAG ring laser, pumped by a 1.2W high-brightness diode, in which a single acousto-optic modulator enforces unidirectional operation and is used to Q-switch the laser.
Bollig, C.
8d20d72b-a709-438b-adde-7ef0c8658f2d
Butterworth, S.D.
d2fdb456-6422-4d02-87e6-0b63a3fed706
Clarkson, W.A.
3b060f63-a303-4fa5-ad50-95f166df1ba2
Hanna, D.C.
3da5a5b4-71c2-4441-bb67-21f0d28a187d
Bollig, C.
8d20d72b-a709-438b-adde-7ef0c8658f2d
Butterworth, S.D.
d2fdb456-6422-4d02-87e6-0b63a3fed706
Clarkson, W.A.
3b060f63-a303-4fa5-ad50-95f166df1ba2
Hanna, D.C.
3da5a5b4-71c2-4441-bb67-21f0d28a187d

Bollig, C., Butterworth, S.D., Clarkson, W.A. and Hanna, D.C. (1995) Feedback-controlled prelasing: a technique for pulse amplitude and frequency stabilisation of Q-switched lasers. Quantum Electronics Conference (QE12), United Kingdom. 04 - 08 Sep 1995.

Record type: Conference or Workshop Item (Paper)

Abstract

A reliable single-frequency Q-switched laser with high pulse repetition frequency (PRF) and good pulse to pulse stability is desirable for many applications, including those where a high average power is required. One popular approach for obtaining single-frequency operation of Q-switched lasers is to use the technique of prelase Q-switching, where a low power single-frequency oscillation is established prior to opening the Q-switch. In practice this technique has been limited to low PRFs (typically < or = 1kHz) since the prelase usually begins with strong spiking behaviour followed by relaxation oscillations. These take a time to decay to the steady prelase required for reliable single-frequency operation and high pulse to pulse stability. At high PRFs, when the Q-switched pulse builds up from prelase spikes, large fluctuations in pulse amplitude and excessive timing jitter occur. In this paper we report a new technique involving actively controlling the diffraction loss of the Q-switch, so as to damp out spiking and relaxation oscillation. We have applied this technique to a Nd:YAG ring laser, pumped by a 1.2W high-brightness diode, in which a single acousto-optic modulator enforces unidirectional operation and is used to Q-switch the laser.

PDF
493P.pdf - Other
Download (79kB)

More information

Published date: 1995
Additional Information: P4-5
Venue - Dates: Quantum Electronics Conference (QE12), United Kingdom, 1995-09-04 - 1995-09-08
Organisations: Optoelectronics Research Centre, Quantum, Light & Matter Group

Identifiers

Local EPrints ID: 77074
URI: https://eprints.soton.ac.uk/id/eprint/77074
PURE UUID: 01d8f538-2fd9-482d-93a2-07f419cf04bd

Catalogue record

Date deposited: 11 Mar 2010
Last modified: 18 Jul 2017 23:34

Export record

Contributors

Author: C. Bollig
Author: S.D. Butterworth
Author: W.A. Clarkson
Author: D.C. Hanna

University divisions

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.

×