Low-Noise 2-W Average Power, 112-fs Kerr-Lens Mode-Locked Ho:CALGO Laser at 2.1 $\mu\mathrm{m}$ DOI
Weichao Yao, Yicheng Wang,

Shahwar Ahmed

et al.

Published: June 26, 2023

High average power, ultrafast laser sources at 2.1 $\mu\mathrm{m}$ have great potential for numerous applications, example, spectroscopy, nonlinear conversion to the mid-IR, THz, XUV, and material processing. Particularly attractive are systems directly emitting this wavelength, with no complex parametric stages. In regard, Ho-doped materials especially because of their excellent thermal properties, simple quasi-three-level energy scheme, enabling high powers. For applications requiring repetition rates, high-power mode-locked oscillators ideally suited. However, so far, short pulses were difficult achieve due typically narrow-band emission spectra. our recent work, we showed that Ho:CALGO is a promising new overcome difficulty, demonstration SESAM 8.7 W power 369 fs pulse duration [1], limited by small modulation depth SESAM. current report Kerr-lens Ho: CALGO solid-state achieving 112 2 W, corresponding peak 173 kW. Additionally, also studied noise properties laser, indicating very low-noise operation.

Language: Английский

Multiple soliton mode-locking operations of a Holmium-doped fiber laser based on nonlinear polarization rotation DOI
Ping Hu, Jiajia Mao, Xue Zhou

et al.

Optics & Laser Technology, Journal Year: 2023, Volume and Issue: 161, P. 109218 - 109218

Published: Feb. 5, 2023

Language: Английский

Citations

22
Low-noise, 2-W average power, 112-fs Kerr-lens mode-locked Ho:CALGO laser at 2.1 µm DOI
Weichao Yao, Yicheng Wang,

Shahwar Ahmed

et al.

Optics Letters, Journal Year: 2023, Volume and Issue: 48(11), P. 2801 - 2801

Published: April 24, 2023

We report on an in-band pumped soft-aperture Kerr-lens mode-locked Ho3+-doped CaGdAlO4 (Ho:CALGO) bulk laser at 2.1 µm, generating 2 W of average power with 112 fs pulses 91-MHz repetition rate. To the best our knowledge, this is highest from a 100-fs class based Tm3+ or Ho3+ doped material. show that has excellent noise properties, integrated relative intensity 0.02% and timing jitter 950 (rms phase 0.543 mrad) in integration interval 10 Hz to MHz offset frequency. The demonstrated combination high power, short pulses, low makes outstanding source for many applications µm.

Language: Английский

Citations

12
Compact, ultrastable, high repetition-rate 2 μm and 3 μm fiber laser for seeding mid-IR OPCPA DOI Creative Commons
W. Hettel,

G. Golba,

Drew Morrill

et al.

Optics Express, Journal Year: 2024, Volume and Issue: 32(3), P. 4072 - 4072

Published: Jan. 11, 2024

We report a compact and reliable ultrafast fiber laser system optimized for seeding high energy, 2 μ m pumped, 3 wavelength optical parametric chirped pulse amplification to drive soft X-ray harmonics. The delivers 100 MHz narrowband pulses with >1 nJ synchronized ultra-broadband ∼1 FWHM spectrum centered at 39 pJ energy. are derived from single 1.5 oscillator, fully integrated free-space downconversion the m. operates hands-off power instabilities <0.2% over extended periods of time.

Language: Английский

Citations

4
Diode-pumped 88 fs SESAM mode-locked Tm,Ho:CLNGG laser at 2090 nm DOI Creative Commons
Anna Suzuki, Yicheng Wang, Sergei Tomilov

et al.

Applied Physics Express, Journal Year: 2024, Volume and Issue: 17(4), P. 042002 - 042002

Published: March 15, 2024

Abstract We report on a passively mode-locked Tm,Ho:CLNGG laser operating at 2090 nm, pumped by multimode fiber-coupled 793 nm diode, representing the first demonstration of diode-pumped sub-100-fs 2.1 μ m wavelength. Due to disordered nature gain material that exhibits broad and smooth profile, pulses as short 88 fs were achieved with an average output power 120 mW repetition rate 70.3 MHz. Stable self-starting operation was obtained using semiconductor saturable absorber mirror based GaSb system.

Language: Английский

Citations

3
GHz repetition rate, sub-100-fs Ho:CALGO laser at 2.1 µm with watt-level average power DOI
Weichao Yao, Mohsen Khalili, Yicheng Wang

et al.

Optics Letters, Journal Year: 2024, Volume and Issue: 49(6), P. 1591 - 1591

Published: Jan. 18, 2024

We report on a GHz fundamental repetition rate Kerr-lens mode-locked Ho:CALGO laser emitting at 2.1 µm. The employs ring cavity to increase the 1.179 and can be made oscillate in both directions stably with nearly identical performance: for counterclockwise oscillation, it generates 93-fs pulses 1.68 W of average power, whereas 92 fs 1.69 were measured clockwise operation. Our current results represent highest power from 2-µm oscillator and, our knowledge, first sub-100-fs pulse duration Ho-based oscillator.

Language: Английский

Citations

2
Growth, Thermal, and Optical Properties of a Novel Mid-Infrared Ho:LuYAP Laser Crystal DOI
Yang Qiao, Dunlu Sun, Huili Zhang

et al.

Crystal Growth & Design, Journal Year: 2023, Volume and Issue: 23(7), P. 5338 - 5345

Published: June 15, 2023

A novel mid-infrared Ho:Lu0.1Y0.9AlO3 laser crystal with a size of Φ26 mm × 80 was grown successfully by the Czochralski method. The structure characterized in detail powder and single-crystal X-ray diffractions: Pnma (62) space group, = 5.3234 Å, b 7.3517 c 5.1670 V 202.22 Å3, Z 1. rocking curves show that possesses high crystalline quality. It observed transmission electron microscope all atoms are neatly arranged elements uniformly distributed. Meanwhile, refractive index from 400 to 3000 nm at three axes Mohs hardness were also achieved. thermal expansion coefficient is 4.382 10–6 K–1, conductivity 5.872 W·m–1·K–1. Particularly, maximum phonon energy only 552 cm–1, as exhibited Raman spectrum. Finally, transmission, fluorescence spectra, level lifetimes measured compared, which provided basis for subsequent spectral theoretical analysis experiment.

Language: Английский

Citations

4
Polarized Spectroscopy of Ho:CALGO for Ultrafast Lasers DOI
Pavel Loiko,

Kirill Eremeev,

Christoph Liebald

et al.

Published: Jan. 1, 2024

We report on the polarized spectroscopy of Ho 3+ -doped CALGO crystals in spectral range 2-3 μm, confirming observed trends recent mode-locking experiments. The role multiphonon-assisted processes is discussed.

Language: Английский

Citations

1
Short mid-infrared watt-level all-fiber nonlinear pulse compressor above 100-MHz pulse repetition rate DOI Creative Commons

Jingcheng Shang,

Chao Mei, Shengzhi Zhao

et al.

High Power Laser Science and Engineering, Journal Year: 2022, Volume and Issue: 11

Published: Dec. 23, 2022

Abstract We firstly report a 2-μm all-fiber nonlinear pulse compressor based on two pieces of normal dispersion fiber (NDF), which enables high-power scaling ability watt-level and high compression ratio 13.7. With the NDF-based compressor, 450-fs laser pulses with repetition rate 101.4 MHz are compressed to 35.1 fs, corresponding 5.2 optical oscillation cycle at wavelength region. The output average power reaches 1.28 W, is believed be highest value never achieved from previous compressors above 100 MHz. dynamic evolution ultrafast inside numerically analyzed, matching well experimental results.

Language: Английский

Citations

5
2 μm Tm∶GdScO3锁模激光器 DOI Open Access

魏文龙 Wei Wenlong,

张宁 Zhang Ning,

宋青松 Song Qingsong

et al.

Acta Optica Sinica, Journal Year: 2023, Volume and Issue: 43(22), P. 2214002 - 2214002

Published: Jan. 1, 2023

钙钛矿结构的新型Tm∶GdScO3晶体具有平坦且宽带（>450 nm）的增益光谱，可以产生2 μm波段少周期激光脉冲。然而，目前该晶体的锁模激光特性，尤其是其各向异性的超短脉冲输出特性尚未明朗。采用b切的Tm∶GdScO3晶体作为增益介质，通过共振泵浦被动锁模技术，详细研究了其E//a发光方向的飞秒脉冲输出特性，实现了60 fs激光脉冲产生（约9个光学周期），激光中心波长为2034 nm，光谱半峰全宽为80 nm，时间带宽积为0.35，接近傅里叶转换极限。该研究证明了Tm∶GdScO3晶体是实现2 μm波段少周期飞秒脉冲的理想激光材料，所获得的飞秒激光在分子超快动力学、高分辨率分子光谱学等科学研究领域极具应用潜力。

Citations

1
0.7 MW Yb:YAG pumped degenerate optical parametric oscillator at 2.06 μm DOI Creative Commons

Anni Li,

Mehran Bahri,

Robert M. Gray

et al.

APL Photonics, Journal Year: 2024, Volume and Issue: 9(10)

Published: Oct. 1, 2024

Frequency comb spectroscopy and field-resolved broadband absorption are promising techniques for rapid, precise, sensitive detection of short-lived atmospheric pollutants on-site. Enhancing sensitivity in hinges on bright sources that cover molecular resonances fast signal modulation to implement lock-in schemes efficiently. Yb:YAG thin-disk lasers, combined with optical parametric oscillators (OPOs), present a compelling solution fulfill these requirements. In this work, we report OPO pumped using Kerr-lens mode-locked oscillator delivering 2.8 W, 114 fs pulses at 2.06 μm an averaged energy 90 nJ. The cavity operates 30.9 MHz repetition rate—twice the rate pump laser—allowing broadband, efficient, dispersion-free output 15.45 rate. With 13% optical-to-optical conversion efficiency high-frequency intra-cavity modulation, scalable scheme holds promise advance frontiers spectroscopy.

Language: Английский

Citations

0