Conductive graphene as passive saturable absorber with high instantaneous peak power and pulse energy in Q-switched regime

A novel 2H-phase transition metal dichalcogenide (TMD)–tantalum selenide (TaSe2) with metallic bandgap structure is a potential photoelectric material. A band structure simulation of TaSe2 via ab initio method indicated its metallic property. An effective multilayered TaSe2 saturable absorber (SA) was fabricated using liquid-phase exfoliation and optically driven deposition. The prepared 2H–TaSe2 SA was successfully used for a dual-wavelength Q-switched fiber laser with the minimum pulse width of 2.95 μs and the maximum peak power of 64 W. The repetition rate of the maximum pulse energy of 89.9 kHz was at the level of 188.9 nJ. The metallic 2H–TaSe2 with satisfactory saturable absorbing capability is a promising candidate for pulsed laser applications.

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The soliton mode-lock fiber laser pulse energy dependence from saturable absorber parameters

2020 International Conference Laser Optics (ICLO) ◽

10.1109/iclo48556.2020.9285836 ◽

2020 ◽

Author(s):

A.A. Mastin ◽

P.A. Ryabochkina

Keyword(s):

Laser Pulse ◽

Fiber Laser ◽

Energy Dependence ◽

Saturable Absorber ◽

Pulse Energy ◽

Laser Pulse Energy ◽

Mode Lock

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Study on Laser Welding of Phone Nuts

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.815.778 ◽

2013 ◽

Vol 815 ◽

pp. 778-781

Author(s):

Xiao Hong Wu

Keyword(s):

Tensile Strength ◽

Stainless Steel ◽

Laser Pulse ◽

Laser Welding ◽

Pulse Energy ◽

Pulse Width ◽

Peak Power ◽

Laser Pulse Energy ◽

304 Stainless Steel ◽

Power Pulse

Used YAG pulse laser to weld 304 stainless steel nuts, studied about the parameters such as peak power, pulse width, defocus distance impacting on the performance of the joints welded by laser. The studies showed that the tensile strength and torque of the nuts increased as the peak power and the pulse width increased.Burn through in welding easy occur when laser pulse energy is too big, pulse width is too wide or defocus distance is too low.

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All-fiber passively Q-switched ytterbium doped double-clad fiber lasers: experiment And modeling.

10.32920/ryerson.14656230 ◽

2021 ◽

Author(s):

Yi Lu

Keyword(s):

Pulse Energy ◽

Traveling Wave ◽

Pulse Width ◽

Fiber Lasers ◽

Peak Power ◽

Wave Model ◽

Core Size ◽

The Core ◽

Q Switching ◽

Output Characteristics

All-fiber passively Q-switched lasers were demonstrated using ytterbium-doped double cladding fiber (YDF) as an active medium. The laser was pumped by three 25W, 975nm fiber coupled diodes and Q-switching was initiated when the amplified spontaneous emission generated in the core of the gain fiber bleached the saturable absorber (SA). A piece of samarium-doped fiber was used as SA in first configuration and pulses with 68μJ pulse energy and 210ns pulse width were obtained. In second configuration, a piece of ytterbium-doped fiber with much smaller core size was used as SA to produce pulse energy of 86μJ. The last configuration incorporated a 9m-long YDF as gain fiber. The far end from pump was acting as SA in this case and pulses with 82μJ pulse energy and 148ns pulse width were observed. The peak power was estimated at 554W. Traveling wave model was implemented to numerically simulate the output characteristics versus pump power.

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Mode-locked operation with 9kW peak power using Au nanoparticles saturable absorber

Optik ◽

10.1016/j.ijleo.2020.165976 ◽

2020 ◽

pp. 165976

Author(s):

A.H.A. Rosol ◽

M.B.H. Mahyuddin ◽

N. Musa ◽

M.S.A. Aziz ◽

M.I.M.A. Khudus ◽

...

Keyword(s):

Saturable Absorber ◽

Peak Power ◽

Au Nanoparticles

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Improvements of Soliton Pulse Energy and Peak Power in Thulium-Doped Fiber Laser

IEEE Photonics Technology Letters ◽

10.1109/lpt.2019.2912943 ◽

2019 ◽

Vol 31 (11) ◽

pp. 909-912

Author(s):

Desheng Zhao ◽

Tianshu Wang ◽

Wanzhuo Ma ◽

Runmin Liu ◽

Peng Lin ◽

...

Keyword(s):

Fiber Laser ◽

Pulse Energy ◽

Peak Power ◽

Soliton Pulse

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1.25-MW peak-power Kerr-lens mode-locked Ti:sapphire laser with a broadband semiconductor saturable-absorber mirror

Optics Communications ◽

10.1016/s0030-4018(00)00838-5 ◽

2000 ◽

Vol 183 (1-4) ◽

pp. 159-163 ◽

Cited By ~ 3

Author(s):

Jie Jiang ◽

Toshifumi Hasama ◽

Zhigang Zhang ◽

Takeyoshi Sugaya ◽

Tadashi Nakagawa

Keyword(s):

Saturable Absorber ◽

Peak Power ◽

Ti:Sapphire Laser ◽

Semiconductor Saturable Absorber

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Self-compression at 1 µm wavelength in all-bulk multi-pass geometry

Applied Physics B ◽

10.1007/s00340-020-07506-4 ◽

2020 ◽

Vol 126 (10) ◽

Author(s):

Sebastian Gröbmeyer ◽

Kilian Fritsch ◽

Benedikt Schneider ◽

Markus Poetzlberger ◽

Vladimir Pervak ◽

...

Keyword(s):

Pulse Energy ◽

Peak Power ◽

Pulse Compression ◽

Near Infrared ◽

Average Power ◽

High Peak Power ◽

Total Efficiency ◽

Highly Nonlinear ◽

Infrared Spectral ◽

Temporal Compression

Abstract We present directly oscillator-driven self-compression inside an all-bulk Herriott-type multi-pass cell in the near-infrared spectral range. By utilizing precise dispersion management of the multi-pass cell mirrors, we achieve pulse compression from 300 fs down to 31 fs at 11 µJ pulse energy and 119 W average power with a total efficiency exceeding 85%. This corresponds to an increase in peak power by more than a factor of three and a temporal compression by almost a factor of ten in a single broadening stage without necessitating subsequent dispersive optics for temporal compression. The concept is scalable towards millijoule pulse energies and can be implemented in visible, near-infrared and infrared spectral ranges. Importantly, it paves a way towards exploiting Raman soliton self-frequency shifting, supercontinuum generation and other highly nonlinear effects at unprecedented high peak power and pulse energy levels.

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