Characteristics of a high-power picosecond mid-IR parametric generator/amplifier tunable between 1.5 and 3.2 μm

Csanaková, Bianka; Novák, Ondřej; Roskot, Lukas; Mužík, Jiří; Jelı́nková, Helena; Smrž, Martin; Mocek, Tomáš

doi:10.1117/12.2520215

Cited by 3 publications

(2 citation statements)

References 3 publications

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“…For higher pulse energy, the ps pulse generated from OPG was usually amplified by an optical parametric amplifier (OPA) with the separated pump beams. [21,22] For instance, a cascaded OPG and OPA system based on OP-GaAs crystal was pumped by a Tm fiber MOPA providing 1-MHz and 46 ps, generating 0.4 µJ tunable mid-infrared radiation in 2552-2960 nm. [21] Here, the fundamental pump beam was split into two beams for pumping the OPG and OPA stages, separately, and the time delayer should be used, leading to the OPG and OPA system to be very complex.…”

Section: Introductionmentioning

confidence: 99%

High-energy picosecond single-pass multi-stage optical parametric generator and amplifier

Yan¹,

Zhao²,

Liu³

et al. 2022

Chinese Phys. B

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We demonstrate a new management of multi-stage optical parametric generator (OPG) and amplifier (OPA) to obtain high-energy picosecond sources with high beam quality. The setup of multi-stage OPG-OPA requires mode-matching between the pump beam and the stable mode of the OPG-OPA. In a proof-of-principle experiment, the single-pass multi-stage OPG-OPA consists of three walk-off compensated KTP crystal pairs and two lenses, pumped by an 86 ps, 1064 nm 10 kHz picosecond laser. The signal light at ∼ 1.77 μ m has an average output power of 502 mW with record energy up to 50.2 μ J. The beam quality factor of the signal light can be improved to M x 2 × M y 2 = 1.87 × 2.16 after filtering out about 40% signal power. To the best of our knowledge, it is the first picosecond single-pass multi-stage OPG-OPA pumped at kHz regime.

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Section: Introductionmentioning

confidence: 99%

High-energy picosecond single-pass multi-stage optical parametric generator and amplifier

Yan¹,

Zhao²,

Liu³

et al. 2022

Chinese Phys. B

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“…Availability of optical elements such as polarizers is limited especially when they should operate over a broadband wavelength range. An example of a source, which needs ultra-broadband optical elements, is the picosecond, high-power mid-IR source based on optical parametric conversion under development at the HiLASE Centre [5,6,7]. It consists of an optical parametric generator (OPG) followed by an optical parametric amplifier (OPA), both pumped by a beam of an Yb:YAG thin-disk laser, delivering 90 W of average power at 93 kHz pulse repetition rate, 1030 nm wavelength and pulse duration down to 1.3 ps.…”

Section: Introductionmentioning

confidence: 99%

Silicon Brewster plate wavelength separator for a mid-IR optical parametric source

et al. 2021

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The availability of optical elements for the mid-infrared wavelength range, such as polarizers and wavelength separators, is limited especially when a broadband wavelength range coverage is required. We propose a polarizer based on uncoated silicon Brewster plates. A detailed analysis of the polarizer's contrast and the influence of parasitic reflections, its dependence on wavelength and the angular misalignment is shown. Two different arrangements of the two and four-plate polarizer are discussed. With contrast including the influence of parasitic reflections of over 10 3 for the whole transparency range of silicon (1.2 -6.5 μm), the four-plate polarizer is an effective, low-cost, high-power compatible tool providing sufficient contrast for signal and idler beam separation of the broadband mid-infrared type II optical parametric sources. The proposed polarizers can function as an attenuator assembly without any waveplate.

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Importance of crystal length on the stability of a picosecond supercontinuum generated in undoped YAG

et al. 2023

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In this paper, we present the stability characteristics of a supercontinuum (SC) generated in a 60 mm, 100 mm, and 130 mm long undoped yttrium aluminum garnet (YAG) crystal pumped by a Yb thin-disk regenerative amplifier. The 1.2 ps pulses with a central wavelength of 1030 nm and repetition rate of 89 kHz are loosely focused (NA = 0.0031) into the crystal in order to prevent laser-induced damage and to increase the energy stability of the generated SC. Out of the tested crystal lengths, the optimal is experimentally determined to be 130 mm. The energy contained in the blueshifted side, which has a 530 nm spectral cutoff, is 71 nJ and exhibits average power stability of 0.4% RMS, which is 2.5× better than the stability of the pump beam.

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Characteristics of a high-power picosecond mid-IR parametric generator/amplifier tunable between 1.5 and 3.2 μm

Cited by 3 publications

References 3 publications

High-energy picosecond single-pass multi-stage optical parametric generator and amplifier

High-energy picosecond single-pass multi-stage optical parametric generator and amplifier

Silicon Brewster plate wavelength separator for a mid-IR optical parametric source

Importance of crystal length on the stability of a picosecond supercontinuum generated in undoped YAG

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