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Widely tunable, narrow-linewidth, high-peak-power, picosecond mid-infrared optical parametric amplifier

Widely tunable, narrow-linewidth, high-peak-power, picosecond mid-infrared optical parametric amplifier
Widely tunable, narrow-linewidth, high-peak-power, picosecond mid-infrared optical parametric amplifier
We report a widely tunable, narrow-linewidth, mid-infrared (mid-IR) cascaded optical parametric generator - optical parametric amplifier (OPG-OPA) based on orientation-patterned GaAs (OP-GaAs) pumped by a 46-picosecond (ps), 1 MHz, 1952 nm diode-seeded Thulium(Tm)-doped-fiber master oscillator power amplifier (MOPA). The Tm-doped-fiber MOPA beam was split by a polarizing beam splitter into two arms to pump the OPG and OPA stages, respectively. The generated signal from the OPG was spectrally filtered by a diffraction grating combined with an adjustable aperture to act as the tunable seed light for the OPA. Widely tunable output in the range of 2552-2960 nm (signal) and 5733-8305 nm (idler) was obtained from the OPA with narrow linewidths of 1.4 cm-1 (signal, 2942 nm) and 9 cm-1 (idler, 5800 nm), respectively. A maximum pulse energy of 0.40 μJ (signal, 2942 nm) and 0.16 μJ (idler, 5800 nm) was obtained at an overall conversion efficiency of 22.4% for the OPA stage. The pulse duration of the generated signal was 36 ps and assuming the generated idler had the same pulse duration the corresponding maximum peak powers were calculated to be 11.1 kW (signal) and 4.5 kW (idler), respectively.
1077-260X
1-6
Fu, Qiang
c57afce6-b73b-4999-8469-1fb2947f5dbf
Xu, Lin
b887cecd-d21e-49f4-9b45-6909a7369e84
Liang, Sijing
0bb48ad1-5bd9-4764-9664-5017a65db7d0
Shepherd, David
9fdd51c4-39d6-41b3-9021-4c033c2f4ead
Richardson, David
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Alam, Shaif-Ul
2b6bdbe5-ddcc-4a88-9057-299360b93435
Fu, Qiang
c57afce6-b73b-4999-8469-1fb2947f5dbf
Xu, Lin
b887cecd-d21e-49f4-9b45-6909a7369e84
Liang, Sijing
0bb48ad1-5bd9-4764-9664-5017a65db7d0
Shepherd, David
9fdd51c4-39d6-41b3-9021-4c033c2f4ead
Richardson, David
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Alam, Shaif-Ul
2b6bdbe5-ddcc-4a88-9057-299360b93435

Fu, Qiang, Xu, Lin, Liang, Sijing, Shepherd, David, Richardson, David and Alam, Shaif-Ul (2018) Widely tunable, narrow-linewidth, high-peak-power, picosecond mid-infrared optical parametric amplifier. IEEE Journal of Selected Topics in Quantum Electronics, 24 (5), 1-6. (doi:10.1109/JSTQE.2018.2789878).

Record type: Article

Abstract

We report a widely tunable, narrow-linewidth, mid-infrared (mid-IR) cascaded optical parametric generator - optical parametric amplifier (OPG-OPA) based on orientation-patterned GaAs (OP-GaAs) pumped by a 46-picosecond (ps), 1 MHz, 1952 nm diode-seeded Thulium(Tm)-doped-fiber master oscillator power amplifier (MOPA). The Tm-doped-fiber MOPA beam was split by a polarizing beam splitter into two arms to pump the OPG and OPA stages, respectively. The generated signal from the OPG was spectrally filtered by a diffraction grating combined with an adjustable aperture to act as the tunable seed light for the OPA. Widely tunable output in the range of 2552-2960 nm (signal) and 5733-8305 nm (idler) was obtained from the OPA with narrow linewidths of 1.4 cm-1 (signal, 2942 nm) and 9 cm-1 (idler, 5800 nm), respectively. A maximum pulse energy of 0.40 μJ (signal, 2942 nm) and 0.16 μJ (idler, 5800 nm) was obtained at an overall conversion efficiency of 22.4% for the OPA stage. The pulse duration of the generated signal was 36 ps and assuming the generated idler had the same pulse duration the corresponding maximum peak powers were calculated to be 11.1 kW (signal) and 4.5 kW (idler), respectively.

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Accepted/In Press date: 29 December 2017
e-pub ahead of print date: 8 January 2018
Published date: September 2018

Identifiers

Local EPrints ID: 416699
URI: https://eprints.soton.ac.uk/id/eprint/416699
ISSN: 1077-260X
PURE UUID: 13a4061c-7a79-4b62-a728-80736f05136c
ORCID for Sijing Liang: ORCID iD orcid.org/0000-0003-2477-9525
ORCID for David Shepherd: ORCID iD orcid.org/0000-0002-4561-8184

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Date deposited: 05 Jan 2018 17:30
Last modified: 06 Jun 2018 13:13

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Contributors

Author: Qiang Fu
Author: Lin Xu
Author: Sijing Liang ORCID iD
Author: David Shepherd ORCID iD
Author: Shaif-Ul Alam

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