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Repetition-frequency-tunable mode-locked surface emitting semiconductor laser between 2.78 and 7.87 GHz

Repetition-frequency-tunable mode-locked surface emitting semiconductor laser between 2.78 and 7.87 GHz
Repetition-frequency-tunable mode-locked surface emitting semiconductor laser between 2.78 and 7.87 GHz
We report a repetition frequency tunable, passively mode-locked vertical-external-cavity surface-emitting semiconductor laser (VECSEL) with continuous repetition frequency tuning between 2.78 and 7.87 GHz using mechanical tuning of the laser cavity length. The laser emits near-transform-limited, sub-500-fs pulses over almost an octave tuning range between 2.78 and 5 GHz. At repetition rates above 6 GHz the pulse duration increases to ~2.5 ps. Over the entire tuning range the laser emits an average output power of 40 ± 5 mW in a fundamental transverse mode. The change in pulse duration highlights a change in the dominant modelocking mechanism which forms the pulses. At high repetition frequencies the pulse duration is set by the saturable absorber recovery time. At low repetition frequencies the fluence and peak intensity on the SESAM increases to a point where the fast pulse shaping mechanisms of the optical Stark effect and carrier thermalization dominate the pulse shortening.
1094-4087
23453-23459
Wilcox, Keith G.
b7c8da76-3530-4cbf-aaec-ffa11c347230
Quarterman, Adrian H.
1c79380a-ea21-4ff2-9aeb-62b1bfc3de31
Beere, Harvey E.
21adf7b3-de6c-4b51-96ce-76c673e4dc31
Ritchie, David A.
dafb13bd-0736-4dd3-972f-0c73570a4278
Tropper, Anne C.
f3505426-e0d5-4e91-aed3-aecdb44b393c
Wilcox, Keith G.
b7c8da76-3530-4cbf-aaec-ffa11c347230
Quarterman, Adrian H.
1c79380a-ea21-4ff2-9aeb-62b1bfc3de31
Beere, Harvey E.
21adf7b3-de6c-4b51-96ce-76c673e4dc31
Ritchie, David A.
dafb13bd-0736-4dd3-972f-0c73570a4278
Tropper, Anne C.
f3505426-e0d5-4e91-aed3-aecdb44b393c

Wilcox, Keith G., Quarterman, Adrian H., Beere, Harvey E., Ritchie, David A. and Tropper, Anne C. (2011) Repetition-frequency-tunable mode-locked surface emitting semiconductor laser between 2.78 and 7.87 GHz. Optics Express, 19 (23), 23453-23459. (doi:10.1364/OE.19.023453). (PMID:22109222)

Record type: Article

Abstract

We report a repetition frequency tunable, passively mode-locked vertical-external-cavity surface-emitting semiconductor laser (VECSEL) with continuous repetition frequency tuning between 2.78 and 7.87 GHz using mechanical tuning of the laser cavity length. The laser emits near-transform-limited, sub-500-fs pulses over almost an octave tuning range between 2.78 and 5 GHz. At repetition rates above 6 GHz the pulse duration increases to ~2.5 ps. Over the entire tuning range the laser emits an average output power of 40 ± 5 mW in a fundamental transverse mode. The change in pulse duration highlights a change in the dominant modelocking mechanism which forms the pulses. At high repetition frequencies the pulse duration is set by the saturable absorber recovery time. At low repetition frequencies the fluence and peak intensity on the SESAM increases to a point where the fast pulse shaping mechanisms of the optical Stark effect and carrier thermalization dominate the pulse shortening.

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More information

Published date: 7 November 2011
Organisations: Quantum, Light & Matter Group

Identifiers

Local EPrints ID: 339031
URI: http://eprints.soton.ac.uk/id/eprint/339031
ISSN: 1094-4087
PURE UUID: b02329ca-5801-42d2-be3b-b99c5b11445b

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Date deposited: 22 May 2012 09:27
Last modified: 14 Mar 2024 11:08

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Contributors

Author: Keith G. Wilcox
Author: Adrian H. Quarterman
Author: Harvey E. Beere
Author: David A. Ritchie
Author: Anne C. Tropper

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