Towards intense ultra-broadband high repetition rate terahertz sources based on organic crystals [Invited]

Optical Materials Express, Год журнала: 2023, Номер 13(11), С. 3287 - 3287

Опубликована: Окт. 10, 2023

Increasing the average power of broadband, few-cycle terahertz (THz) sources is currently a topic intense investigation, fueled by recent immense progress in high femtosecond laser driving at 1030 nm. However, many crucial applications would benefit not only from an increase power, but also ultra-broad bandwidth, while maintaining dynamic range these frequencies. This calls for challenging combination repetition rates and simultaneously. Here, we discuss promising approach enabled organic crystals THz-generation. Specifically, this review article discusses advances with most commonly used BNA, DAST, DSTMS, OH1 HMQ-TMS. We place special emphasis on nonlinear thermal properties future directions field.

Язык: Английский

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Nonlinear pulse compression to sub-two-cycle, 1.3 mJ pulses at 1.9 μm wavelength with 132 W average power

Optics Letters, Год журнала: 2023, Номер 48(10), С. 2647 - 2647

Опубликована: Апрель 14, 2023

We report the nonlinear pulse compression of a high-power, thulium-doped fiber laser system using gas-filled hollow-core fiber. The sub-two cycle source delivers 1.3 mJ energy with 80 GW peak power at central wavelength 1.87 μm and an average 132 W. This is, so far, to best our knowledge, highest few-cycle reported in short-wave infrared region. Given its unique combination high power, this is excellent driver for frequency conversion, toward terahertz, mid-infrared, soft X-ray spectral regions.

Язык: Английский

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2~5 μm全固态中红外高功率光纤激光源研究进展（特邀）

Chinese Journal of Lasers, Год журнала: 2024, Номер 51(1), С. 0101005 - 0101005

Опубликована: Янв. 1, 2024

2~5 μm中红外波段激光在科学研究、生物医疗、通信等众多领域中都有重要的应用价值,一直以来都是激光领域的研究热点。主要对目前国内外高功率2~5 μm全固态中红外光纤激光源的发展现状进行了梳理,包括稀土离子掺杂的中红外光纤激光器、波长灵活可设计的拉曼光纤激光器和宽带超连续谱激光器,并对2~5 μm全固态中红外光纤激光源的发展进行了展望。

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Stabilization and Destabilization of Multimode Solitons in Nonlinear Degenerate Multi-Pass Cavities

Research Square (Research Square), Год журнала: 2025, Номер unknown

Опубликована: Апрель 2, 2025

Optical solitons in multimode nonlinear optical systems offer a unique platform for exploring the interplay of nonlinearity, dispersion, and spatial mode coupling, offering insights into complex wave phenomena. Multi-pass cavities (MPCs) incorporating Kerr media serve as prototypical systems, enabling high-efficiency supercontinuum generation pulse compression. However, stabilizing femtosecond laser pulses solid-medium-based MPCs (solid MPCs) under high nonlinearity remains significant challenge due to which disrupts beam stability. In this work, we address by investigating stability using Floquet analysis first-order perturbation theory. We identify novel mode-coupling-suppression (MCS) medium lengths, where destructive interference among components suppresses coupling facilitates soliton stabilization. Under MCS conditions, demonstrate stable propagation solid with phases up 1.85π per pass, achieving 10-fold compression exceptional spatio-spectral homogeneity. Our findings valuable guidance designing advanced tailored media.

Язык: Английский

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Spectral broadening of 2-mJ femtosecond pulses in a compact air-filled convex–concave multi-pass cell

Optics Letters, Год журнала: 2023, Номер 48(6), С. 1458 - 1458

Опубликована: Фев. 6, 2023

Multi-pass cell (MPC) based temporal pulse compressors have emerged in recent years as a powerful and versatile solution to the intrinsic issue of long pulses from Yb-based high-power ultrafast lasers. The spectral broadening high-energy (typically more than 100 µJ) has only been realized gas-filled MPCs due significantly lower nonlinear coefficient gases compared with solid-state media. Whereas these systems reach impressive performance terms very low spatiotemporal couplings, they are typically complex setups, i.e., large costly pressure-controlled vacuum chambers avoid strong focusing, ionization, damage mirrors. Here, we present 2-mJ simple compact (60-cm-long) multi-pass operated ambient air. Instead traditional Herriott concave-concave (CC/CC) mirrors, use convex-concave (CX/CC) design, where beam stays at all times, both minimizing allowing operation We demonstrate 2.1-mJ kHz repetition rate (200 W average power) 2.1 nm (pulse duration 670 fs) bandwidth 24.5 nm, supporting 133-fs 96% transmission efficiency. show compressibility down 134 fs verify that homogeneity is similar previously reported CC/CC designs. To best authors' knowledge, this first report CX/CC MPC compressor high energies Because its simplicity, small footprint, cost, believe demonstration will significant impact laser community.

Язык: Английский

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Highly efficient nonlinear compression of mJ pulses at 2 μm wavelength to 20 fs in a gas-filled multi-pass cell

Journal of Physics Photonics, Год журнала: 2024, Номер 6(3), С. 035015 - 035015

Опубликована: Май 16, 2024

Abstract Within this work we demonstrate the highly efficient nonlinear spectral broadening and subsequent temporal compression of 1.49 mJ pulses at 101 kHz repetition rate from an ultrafast thulium-doped fiber laser system employing a gas-filled multi-pass cell (MPC). To achieve broadening, use krypton helium-filled Herriott-type MPC with reflective broadband dielectric mirrors. The spectrally broadened are subsequently compressed using fused-silica plates, resulting in pulse duration 20 fs overall excellent transmission 96%. Furthermore, beam quality is preserved up to maximum output power 144 W. It provides, best our knowledge, highest average few-cycle 2 µ m wavelength almost 10 times more energy 3 than previous MPCs, enabling future secondary source experiments.

Язык: Английский

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High-power two-color plasma-based THz generation driven by a Tm-doped fiber laser

Optics Letters, Год журнала: 2023, Номер 48(13), С. 3403 - 3403

Опубликована: Май 30, 2023

We report on the efficient generation of broadband THz radiation based a two-color gas-plasma scheme. Broadband pulses covering whole spectral region, from 0.1-35 THz, are generated. This is enabled by high-power, ultra-fast, thulium-doped, fiber chirped pulse amplification (Tm:FCPA) system and subsequent nonlinear compression stage that uses gas-filled capillary. The driving source delivers 40 fs at central wavelength 1.9 μm with 1.2 mJ energy 101 kHz repetition rate. Owing to long use gas-jet in focus, highest reported conversion efficiency for high-power sources (>20 mW) 0.32% has been achieved. high average power 380 mW make this an ideal nonlinear, tabletop science.

Язык: Английский

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High Efficiency BiBO based OPCPA with ~2.1 mJ, 38 fs Output Pulses at ~2150 nm

High Power Laser Science and Engineering, Год журнала: 2023, Номер 11

Опубликована: Янв. 1, 2023

Abstract We present a compact and cost-effective mJ-level femtosecond laser system operating at center wavelength of approximately 2.15 μm. An affordable two-stage ytterbium-doped yttrium aluminum garnet (Yb:YAG) chirped pulse amplifier provides more than 10 mJ, 1.2 ps pulses 1030 nm to pump three-stage optical parametric (OPCPA) based on bismuth borate crystals drive the supercontinuum seed in YAG crystal. The energy amplified range 1.95–2.4 μm reached 2.25 mJ with pump-to-signal conversion efficiency 25% last OPCPA stage. These were compressed 38 fs pair Suprasil 300 glass prisms.

Язык: Английский

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Nonlinear pulse compression technique based on in multi-pass plano-cancave cavity

Acta Physica Sinica, Год журнала: 2024, Номер 73(12), С. 124206 - 124206

Опубликована: Янв. 1, 2024

<sec>Ultrafast femtosecond laser system with hundreds of microjoules energy, operating at a repetition frequency several kilohertz, has very important applications in many fields such as medicine, mid-infrared generation, industrial processing, and vibrational spectroscopy. The chirped pulse amplification technique provides feasible path to obtain light sources those parameters. However, the use increases technical complexity cost system. Recently, proposal multi-pass cell (MPC) nonlinear compression enabled us high power ultrafast pulses reduced cost. device requires only two concave mirrors medium between. In past seven years, made great progress, making it possible ultrashort average more than few kW peak tens TW.</sec><sec>In this work, we achieve 100-W picosecond by using an improved scheme that combines hybrid plano-cancave multi-thin-plate. Using fused silica plates cavity, spectral bandwidth (FWHM) input is broadened from 0.24 nm 4.8 due self-phase modulation effect, compressed 483 fs dispersion compensation grating pairs, which corresponds factor 22, final output 44.2 W obtained. Compared traditional MPC, cavity developed promising solution for its compactness, stability large ratio.</sec>

Язык: Английский

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Multipass cell for mJ-level, sub-two cycle nonlinear pulse compression with >100W average power at 1.9 µm

Опубликована: Янв. 1, 2024

In this work, we present a nonlinear post-compression with an average power exceeding 100 W based on gas-filled multipass cell providing sub-two-cycle pulses. It is enabled by thulium-doped fiber chirped-pulsed amplification system.

Язык: Английский

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