Pulse width and peak power optimization in a mode-locked fiber laser with a semiconductor saturable absorber mirror

2012 ◽  
Vol 54 (10) ◽  
pp. 2256-2261 ◽  
Author(s):  
Seung Bum Cho ◽  
Hoseong Song ◽  
Sangyoun Gee ◽  
Chang-Soo Park ◽  
Dug Young Kim
Keyword(s):  
Fiber Laser ◽  
Saturable Absorber ◽  
Pulse Width ◽  
Peak Power ◽  
Power Optimization ◽  
Semiconductor Saturable Absorber

scholarly journals Metallic 2H-Tantalum Selenide Nanomaterials as Saturable Absorber for Dual-Wavelength Q-Switched Fiber Laser

Sensors ◽  
2021 ◽  
Vol 21 (1) ◽  
pp. 239
Author(s):  
Lingling Yang ◽  
Ruwei Zhao ◽  
Duanduan Wu ◽  
Tianxiang Xu ◽  
Xiaobiao Liu ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Saturable Absorber ◽  
Peak Power ◽  
Dual Wavelength ◽  
Transition Metal Dichalcogenide ◽  
Promising Candidate ◽  
Laser Applications ◽  
Maximum Pulse Energy ◽  
Structure Simulation ◽  
Tantalum Selenide

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.

scholarly journals Highly Stable Passively Q-Switched Erbium-Doped All-Fiber Laser Based on Niobium Diselenide Saturable Absorber

Molecules ◽  
2021 ◽  
Vol 26 (14) ◽  
pp. 4303
Author(s):  
Ping Hu ◽  
Jiajia Mao ◽  
Hongkun Nie ◽  
Ruihua Wang ◽  
Baitao Zhang ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Saturable Absorber ◽  
Pulse Width ◽  
Nonlinear Optical ◽  
Modulation Depth ◽  
Transition Metal Dichalcogenide ◽  
Center Wavelength ◽  
Niobium Diselenide ◽  
Erbium Doped ◽  
Layered Transition Metal

A saturable absorber (SA) based on niobium diselenide (NbSe2), which is a layered transition metal dichalcogenide (TMD) in the VB group, is fabricated by the optically driven deposition method, and the related nonlinear optical properties are characterized. The modulation depth, saturable intensity, and nonsaturable loss of the as-prepared NbSe2 nanosheet-based SA are measured to be 16.2%, 0.76 MW/cm2, and 14%, respectively. By using the as-fabricated NbSe2 SA, a highly stable, passively Q-switched, erbium-doped, all-fiber laser is realized. The obtained shortest pulse width is 1.49 μs, with a pulse energy of 48.33 nJ at a center wavelength of 1560.38 nm. As far as we know, this is the shortest pulse duration ever obtained by an NbSe2 SA in a Q-switched fiber laser.

Stable continuous-wave mode-locked laser from a 1645 nm Er:YAG ceramic oscillator

2022 ◽  
Author(s):  
Yangyu Liu ◽  
Xue Cao ◽  
AnHua Xian ◽  
Guangmiao Liu ◽  
Wei zhou ◽  
...  
Keyword(s):  
Solid State ◽  
Pulse Width ◽  
Peak Power ◽  
Continuous Wave ◽  
Modulation Depth ◽  
Average Power ◽  
Mode Locking ◽  
Wave Mode ◽  
Semiconductor Saturable Absorber ◽  
Continuous Wave Mode

Abstract We demonstrate stable continuous-wave mode-locking (CWML) pulses around 1645nm by employing the home-made Er:YAG ceramic. By using a fiber laser and semiconductor saturable absorber mirror (SESAM) with modulation depth of 1.2%, we get ML pulses with the output average power up to 815 mW, the pulse width shortened as ~4 ps, and the peak power of 1.8 kW. With the SESAM of modulation depth of 2.4%, the second-order harmonic ML pulses were also obtained. As far as we know, this is the first report of CWML from Er3+-doped ceramics and also the shortest pulse duration in Er3+-doped solid-state oscillators.

High power passively Q-switched Er3+-doped ZBLAN fiber laser at 2.8 µm based on a semiconductor saturable absorber mirror

2018 ◽  
Vol 15 (8) ◽  
pp. 085109 ◽  
Author(s):  
Xue Lai ◽  
Jianfeng Li ◽  
Hongyu Luo ◽  
Chen Zhu ◽  
Yongchen Hai ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Saturable Absorber ◽  
High Power ◽  
Semiconductor Saturable Absorber

Q-SWITCHED THULIUM-DOPED FIBER LASER AT 2 MICRON REGION BY 802 NM PUMPING

2015 ◽  
Vol 74 (8) ◽  
Author(s):  
A. A. Latiff ◽  
M. T. Ahmad ◽  
Z. Zakaria ◽  
H. Ahmad ◽  
S. W. Harun
Keyword(s):  
Carbon Nanotubes ◽  
Pump Power ◽  
Fiber Laser ◽  
Saturable Absorber ◽  
Pulse Width ◽  
Laser Cavity ◽  
Pulse Generation ◽  
Q Switching ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

An 1892.4 nm ultrafast passive Q-switched fiber laser is demonstrated by using Thulium-doped fiber (TDF) in conjunction with a multi-walled carbon nanotubes (MWCNTs) as a saturable absorber (SA). The MWCNTs film is sandwiched between two FC/PC fiber connectors and integrated into the laser cavity with 802 nm pump for Q-switching pulse generation. The pulse repetition rate can be tuned from 3.8 to 4.6 kHz while the corresponding pulse width reduces from 22.1 to 18.4 μs as the pump power is increased from 187.3 to 194.2 mW. A higher performance Q-switched Thulium-doped fiber laser (TDFL) is expected to be achieved with the optimization of the MWCNT-SA saturable absorber and laser cavity.

scholarly journals Pulse width shaping of passively mode-locked soliton fiber laser via polarization control in carbon nanotube saturable absorber

2013 ◽  
Vol 21 (22) ◽  
pp. 27011 ◽  
Author(s):  
Hwanseong Jeong ◽  
Sun Young Choi ◽  
Fabian Rotermund ◽  
Dong-Il Yeom
Keyword(s):  
Carbon Nanotube ◽  
Fiber Laser ◽  
Saturable Absorber ◽  
Pulse Width ◽  
Polarization Control

scholarly journals Graphene slurry based passive Q-switcher in erbium doped fiber laser

2019 ◽  
Vol 8 (4) ◽  
Author(s):  
Siti Nur Fatin Zuikafly ◽  
Nor Farhah Razak ◽  
Rizuan Mohd Rosnan ◽  
Sulaiman Wadi Harun ◽  
Fauzan Ahmad
Keyword(s):  
Pump Power ◽  
Fiber Laser ◽  
Pulse Width ◽  
Peak Power ◽  
Signal To Noise Ratio ◽  
Pulsed Laser ◽  
Laser Cavity ◽  
Signal To Noise ◽  
Maximum Pulse Energy ◽  
Erbium Doped

In this work, a Graphene slurry based passive Q-switcher fabricated from Graphene-Polylactic acid (PLA) filament which is used for 3D printing. To produce the Graphene slurry, the diameter of the filament was reduced and Tetrahydrofuran (THF) was used to dissolve the PLA. The Graphene-THF suspension was drop cast to the end of a fiber ferrule and the THF then evaporated to develop Graphene slurry based SA which is integrated in fiber laser cavity. At threshold input pump power of 30.45 mW, a Q-switched Erbium-doped fiber laser (EDFL) can be observed with the wavelength centered at 1531.01 nm and this remained stable up to a pump power of 179.5 mW. As the pump power was increased gradually, an increase in the repetition rates was recorded from 42 kHz to 125 kHz, while the pulse width was reduced to 2.58 μs from 6.74 μs. The Q-switched laser yielded a maximum pulse energy and peak power of 11.68 nJ and 4.16 mW, respectively. The proposed Graphene slurry based saturable absorber also produced a signal-to-noise ratio of 44 dB indicating a stable Q-switched pulsed laser.

scholarly journals Mid-infrared Fe2+:ZnSe semiconductor saturable absorber mirror for passively Q-switched Er3+-doped ZBLAN fiber laser

AIP Advances ◽  
2018 ◽  
Vol 8 (2) ◽  
pp. 025121 ◽  
Author(s):  
Shougui Ning ◽  
Guoying Feng ◽  
Shenyu Dai ◽  
Hong Zhang ◽  
Wei Zhang ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Saturable Absorber ◽  
Mid Infrared ◽  
Semiconductor Saturable Absorber

Parametric Analysis of Laser Beam Percussion Drilling for Thin Titanium Alloy Sheet Using Yb: Yag Fiber Laser

2021 ◽  
pp. 1-24
Author(s):  
Mohit Singh ◽  
Sanjay Mishra ◽  
Vinod Yadava ◽  
J. Ramkumar
Keyword(s):  
Laser Beam ◽  
Fiber Laser ◽  
Pulse Width ◽  
Peak Power ◽  
Laser Pulses ◽  
Pulse Frequency ◽  
Alloy Sheet ◽  
Power Pulse ◽  
The Individual ◽  
Percussion Drilling

Laser beam percussion drilling (LBPD) can create high density holes in aerospace materials with the repeated application of laser pulses at a single spot. In this study, one-parameter-at-a-time approach has been used to investigate the individual effect of peak power, pulse width and pulse frequency on geometrical accuracy and metallurgical distortion during LBPD of 0.85[Formula: see text]mm thick Ti–6Al–4V sheet using 200[Formula: see text]W Yb:YAG fiber laser. It has been found that the output parameters behave differently at the higher and lower values of a particular input process. The increase of pulse width from 1 to 1.50[Formula: see text]ms increases hole taper by 20% whereas the same corresponding change from 1.50 to 2.00[Formula: see text]ms reduces the taper by 20%. The increase of pulse frequency from 10 to 50[Formula: see text]Hz reduces hole circularity by 40% but the same proportionate change from 50 to 90[Formula: see text]Hz reduces circularity by 79%. Increase of peak power from 1.70 to 2.0[Formula: see text]kW increases hole taper by 8% but the corresponding increase from 2 to 2.30[Formula: see text]kW is 143%.

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