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Graphene Q-switched mode-locked and Q-switched ion-exchanged waveguide lasers

Graphene Q-switched mode-locked and Q-switched ion-exchanged waveguide lasers
Graphene Q-switched mode-locked and Q-switched ion-exchanged waveguide lasers
In this paper, we present the use of mono-layer graphene saturable absorbers to produce Q-switched and Q-switched mode-locked operation of Yb and Yb:Er-doped phosphate glass waveguide lasers, respectively. For the 1535-nm wavelength Yb:Er laser, the Q-switched pulses have repetition rates up to 526 kHz and contain mode-locked pulses at a repetition frequency of 6.8 GHz. The measured 0.44 nm bandwidth should allow pulses as short as ~6ps to be generated. Maximum average output powers of 27 mW are obtained at a slope efficiency of 5% in this mode of operation. For the 1057-nm-wavelength Yb laser, Q-switched pulses are obtained with a repetition rate of up to 833 kHz and a maximum average output power of 21 mW. The pulse duration is found to decrease from 292 ns to 140 ns and the pulse energy increase from 17 nJ to 27 nJ as the incident pump power increases from 220 to 652 mW.
1041-1135
646-649
Choudhary, Amol
a5540b54-f153-43e4-a59a-e3ed9360904b
Dhingra, Shonali
b7197528-ed28-434b-a876-e94dcde3370d
D'Urso, Brian
bb631d3a-92ad-4356-bfc8-f443b123f20a
Pradeesh, Kannan
d264c1f5-cbaf-42ac-a939-10fce00fa5cb
Shepherd, David P.
9fdd51c4-39d6-41b3-9021-4c033c2f4ead
Choudhary, Amol
a5540b54-f153-43e4-a59a-e3ed9360904b
Dhingra, Shonali
b7197528-ed28-434b-a876-e94dcde3370d
D'Urso, Brian
bb631d3a-92ad-4356-bfc8-f443b123f20a
Pradeesh, Kannan
d264c1f5-cbaf-42ac-a939-10fce00fa5cb
Shepherd, David P.
9fdd51c4-39d6-41b3-9021-4c033c2f4ead

Choudhary, Amol, Dhingra, Shonali, D'Urso, Brian, Pradeesh, Kannan and Shepherd, David P. (2015) Graphene Q-switched mode-locked and Q-switched ion-exchanged waveguide lasers. IEEE Photonics Technology Letters, 27 (6), 646-649. (doi:10.1109/LPT.2015.2389631).

Record type: Article

Abstract

In this paper, we present the use of mono-layer graphene saturable absorbers to produce Q-switched and Q-switched mode-locked operation of Yb and Yb:Er-doped phosphate glass waveguide lasers, respectively. For the 1535-nm wavelength Yb:Er laser, the Q-switched pulses have repetition rates up to 526 kHz and contain mode-locked pulses at a repetition frequency of 6.8 GHz. The measured 0.44 nm bandwidth should allow pulses as short as ~6ps to be generated. Maximum average output powers of 27 mW are obtained at a slope efficiency of 5% in this mode of operation. For the 1057-nm-wavelength Yb laser, Q-switched pulses are obtained with a repetition rate of up to 833 kHz and a maximum average output power of 21 mW. The pulse duration is found to decrease from 292 ns to 140 ns and the pulse energy increase from 17 nJ to 27 nJ as the incident pump power increases from 220 to 652 mW.

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Accepted/In Press date: 6 January 2015
e-pub ahead of print date: 9 January 2015
Published date: 15 March 2015
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 375069
URI: https://eprints.soton.ac.uk/id/eprint/375069
ISSN: 1041-1135
PURE UUID: b51e8705-dbe7-4858-ab1c-5088ccc3815d
ORCID for David P. Shepherd: ORCID iD orcid.org/0000-0002-4561-8184

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Date deposited: 11 Mar 2015 12:50
Last modified: 01 Oct 2019 01:03

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