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High-average-power picosecond mid-infrared OP-GaAs OPO

High-average-power picosecond mid-infrared OP-GaAs OPO
High-average-power picosecond mid-infrared OP-GaAs OPO
We report a high-average-power mid-infrared picosecond (ps) optical parametric oscillator (OPO) based on orientation-patterned gallium arsenide (OP-GaAs), with wide wavelength tunability. The OP-GaAs OPO is synchronously pumped by a thulium-doped-fiber (TDF) master oscillator power amplifier (MOPA), seeded by a gain-switched laser diode. At a pump power of 35.3 W and a repetition rate of 100 MHz, a maximum OPO total average output power of 9.7 W (signal 5.7 W (0.60 kW peak power), idler 4.0 W (0.42 kW peak power)) is obtained at signal and idler wavelengths of 3093 nm and 5598 nm, and a thermally induced power roll-off is observed. To mitigate the thermal effects, an optical chopper is placed before the OPO to provide burst mode operation and a reduced thermal load. We achieved a linear growth in OPO output power over the full range of available pump powers in this instance confirming thermal effects as the origin of the roll-off observed under continuous pumping. We estimate the maximum peak powers of the signal and idler are estimated to be over 0.79 kW and 0.58 kW, respectively in this instance. A wide mid-infrared wavelength tuning range of 2895-3342 nm (signal) and 4935-6389 nm (idler) is demonstrated.
1094-4087
5741-5748
Fu, Qiang
c57afce6-b73b-4999-8469-1fb2947f5dbf
Xu, Lin
b887cecd-d21e-49f4-9b45-6909a7369e84
Liang, Sijing
2fe0bfcc-99f0-46ee-8a2e-2a7857fbfb74
Shardlow, Peter
9ca17301-8ae7-4307-8bb9-371df461520c
Shepherd, David
9fdd51c4-39d6-41b3-9021-4c033c2f4ead
Alam, Shaif-Ul
2b6bdbe5-ddcc-4a88-9057-299360b93435
Richardson, David
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Fu, Qiang
c57afce6-b73b-4999-8469-1fb2947f5dbf
Xu, Lin
b887cecd-d21e-49f4-9b45-6909a7369e84
Liang, Sijing
2fe0bfcc-99f0-46ee-8a2e-2a7857fbfb74
Shardlow, Peter
9ca17301-8ae7-4307-8bb9-371df461520c
Shepherd, David
9fdd51c4-39d6-41b3-9021-4c033c2f4ead
Alam, Shaif-Ul
2b6bdbe5-ddcc-4a88-9057-299360b93435
Richardson, David
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3

Fu, Qiang, Xu, Lin, Liang, Sijing, Shardlow, Peter, Shepherd, David, Alam, Shaif-Ul and Richardson, David (2020) High-average-power picosecond mid-infrared OP-GaAs OPO. Optics Express, 28 (4), 5741-5748. (doi:10.1364/OE.380189).

Record type: Article

Abstract

We report a high-average-power mid-infrared picosecond (ps) optical parametric oscillator (OPO) based on orientation-patterned gallium arsenide (OP-GaAs), with wide wavelength tunability. The OP-GaAs OPO is synchronously pumped by a thulium-doped-fiber (TDF) master oscillator power amplifier (MOPA), seeded by a gain-switched laser diode. At a pump power of 35.3 W and a repetition rate of 100 MHz, a maximum OPO total average output power of 9.7 W (signal 5.7 W (0.60 kW peak power), idler 4.0 W (0.42 kW peak power)) is obtained at signal and idler wavelengths of 3093 nm and 5598 nm, and a thermally induced power roll-off is observed. To mitigate the thermal effects, an optical chopper is placed before the OPO to provide burst mode operation and a reduced thermal load. We achieved a linear growth in OPO output power over the full range of available pump powers in this instance confirming thermal effects as the origin of the roll-off observed under continuous pumping. We estimate the maximum peak powers of the signal and idler are estimated to be over 0.79 kW and 0.58 kW, respectively in this instance. A wide mid-infrared wavelength tuning range of 2895-3342 nm (signal) and 4935-6389 nm (idler) is demonstrated.

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Accepted/In Press date: 10 January 2020
e-pub ahead of print date: 14 February 2020
Published date: 17 February 2020

Identifiers

Local EPrints ID: 437154
URI: http://eprints.soton.ac.uk/id/eprint/437154
ISSN: 1094-4087
PURE UUID: b35170eb-5fb3-4145-8d3f-49de76c6d526
ORCID for Peter Shardlow: ORCID iD orcid.org/0000-0003-0459-0581
ORCID for David Shepherd: ORCID iD orcid.org/0000-0002-4561-8184
ORCID for David Richardson: ORCID iD orcid.org/0000-0002-7751-1058

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Date deposited: 20 Jan 2020 17:31
Last modified: 04 Mar 2020 01:32

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