scholarly journals Kilowatt high average power narrow-linewidth nanosecond all-fiber laser

2014 ◽  
Vol 2 ◽  
Author(s):  
Rongtao Su ◽  
Pu Zhou ◽  
Xiaolin Wang ◽  
Rumao Tao ◽  
Xiaojun Xu
Keyword(s):  
Fiber Laser ◽  
Continuous Wave ◽  
Stimulated Raman Scattering ◽  
Average Power ◽  
High Repetition Rate ◽  
Single Frequency ◽  
Power Scaling ◽  
Narrow Linewidth ◽  
Main Amplifier ◽  
Multi Stage

AbstractA high power narrow-linewidth nanosecond all-fiber laser based on the master oscillator power amplifier (MOPA) configuration is demonstrated. A pulsed seed with high repetition rate of 10 MHz was generated by modulating a continuous-wave (CW) single-frequency fiber laser at $\sim $1064 nm by using an electro-optic intensity modulator (EOIM). After multi-stage cascaded power amplification, the average power was boosted to be kilowatt level. The pulses from the main amplifier had a pulse width of $\sim $3 ns and an average/peak power of 913 W/28.6 kW. Further power scaling of the pulses was limited by stimulated Raman scattering (SRS) for the moment, method for SRS suppression and further power scaling was briefly discussed.

A linearly frequency modulated narrow linewidth single-frequency fiber laser

2013 ◽  
Vol 10 (7) ◽  
pp. 075106 ◽  
Author(s):  
Can Li ◽  
Shanhui Xu ◽  
Shupei Mo ◽  
Biao Zhan ◽  
Weinan Zhang ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Single Frequency ◽  
Narrow Linewidth

Actively Q-Switched Fiber Laser with Narrow Linewidth, Narrow Pulse Width, and High Repetition Rate

2020 ◽  
Vol 47 (1) ◽  
pp. 0101002
Author(s):  
张骥 Zhang Ji ◽  
张东 Zhang Dong ◽  
刘昊炜 Liu Haowei ◽  
姚波 Yao Bo ◽  
毛庆和 Mao Qinghe
Keyword(s):  
Fiber Laser ◽  
Repetition Rate ◽  
Pulse Width ◽  
High Repetition Rate ◽  
Narrow Linewidth ◽  
High Repetition

Single-frequency, high-power, continuous-wave fiber-laser-pumped Ti:sapphire laser

2011 ◽  
Vol 51 (1) ◽  
pp. 15 ◽  
Author(s):  
Suddapalli Chaitanya Kumar ◽  
Goutam Kumar Samanta ◽  
Kavita Devi ◽  
Stefano Sanguinetti ◽  
Majid Ebrahim-Zadeh
Keyword(s):  
Fiber Laser ◽  
High Power ◽  
Continuous Wave ◽  
Single Frequency ◽  
Ti:Sapphire Laser

scholarly journals Mitigation of stimulated Raman scattering in kilowatt-level diode-pumped fiber amplifiers with chirped and tilted fiber Bragg gratings

2019 ◽  
Vol 7 ◽  
Author(s):  
Meng Wang ◽  
Le Liu ◽  
Zefeng Wang ◽  
Xiaoming Xi ◽  
Xiaojun Xu
Keyword(s):  
Raman Scattering ◽  
Fiber Lasers ◽  
Stimulated Raman Scattering ◽  
Beam Quality ◽  
Average Power ◽  
Fiber Amplifiers ◽  
Maximum Output ◽  
Power Scaling ◽  
Diode Pumped ◽  
Stimulated Raman

The average power of diode-pumped fiber lasers has been developed deeply into the kW regime in the past years. However, stimulated Raman scattering (SRS) is still a major factor limiting the further power scaling. Here, we have demonstrated the mitigation of SRS in kilowatt-level diode-pumped fiber amplifiers using a chirped and tilted fiber Bragg grating (CTFBG) for the first time. The CTFBG is designed and inscribed in large-mode-area (LMA) fibers, matching with the operating wavelength of the fiber amplifier. With the CTFBG inserted between the seed laser and the amplifier stage, an SRS suppression ratio of ${\sim}10~\text{dB}$ is achieved in spectrum at the maximum output laser power of 2.35 kW, and there is no reduction in laser slope efficiency and degradation in beam quality. This work proves the feasibility and practicability of CTFBGs for SRS suppression in high-power fiber lasers, which is very useful for the further power scaling.

Single-frequency DBR Nd-doped fiber laser at 1120  nm with a narrow linewidth and low threshold

2020 ◽  
Vol 45 (8) ◽  
pp. 2263
Author(s):  
Yafei Wang ◽  
Jiamin Wu ◽  
Qilai Zhao ◽  
Weiwei Wang ◽  
Jing Zhang ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Single Frequency ◽  
Narrow Linewidth ◽  
Low Threshold

scholarly journals Monolithic high-average-power linearly polarized nanosecond pulsed fiber laser with near-diffraction-limited beam quality

2018 ◽  
Vol 6 ◽  
Author(s):  
Long Huang ◽  
Pengfei Ma ◽  
Daren Meng ◽  
Lei Li ◽  
Rumao Tao ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Output Power ◽  
Linear Polarization ◽  
Beam Quality ◽  
Average Power ◽  
Narrow Linewidth ◽  
High Average Power ◽  
Maximal Output Power ◽  
Maximal Output ◽  
Pulsed Fiber Laser

An all-fiberized high-average-power narrow linewidth ns pulsed laser with linear polarization is demonstrated. The laser system utilizes a typical master oscillator power amplifier (MOPA) configuration. The stimulated Brillouin scattering (SBS) is effectively suppressed due to the short fiber length and large mode area in the main amplifier, combined with the narrow pulse duration smaller than the phonon lifetime of SBS effect. A maximal output power of 466 W is obtained with a narrow linewidth of ${\sim}$203.6 MHz, and the corresponding slope efficiency is ${\sim}$80.3%. The pulse duration is condensed to be ${\sim}$4 ns after the amplification, corresponding to the peak power of 8.8 kW and the pulse energy of $46.6~\unicode[STIX]{x03BC}\text{J}$. Near-diffraction-limited beam quality with an $M^{2}$ factor of 1.32 is obtained at the output power of 442 W and the mode instability (MI) is observed at the maximal output power. To the best of our knowledge, this is the highest average output power of the all-fiberized narrow linewidth ns pulsed fiber laser with linear polarization and high beam quality, which is a promising source for the nonlinear frequency conversion, laser lidar, and so on.

Widely tunable (>100 nm) continuous-wave narrow-linewidth high-power thulium fiber laser

2009 ◽  
Author(s):  
Timothy S. McComb ◽  
Vikas Sudesh ◽  
Lawrence Shah ◽  
Robert A. Sims ◽  
Martin C. Richardson
Keyword(s):  
Fiber Laser ◽  
High Power ◽  
Continuous Wave ◽  
Narrow Linewidth ◽  
Thulium Fiber Laser
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