High Energy, High Efficiency Nd: Glass Regenerative Amplifier

2012 ◽  
Vol 529 ◽  
pp. 105-109 ◽  
Author(s):  
X.F. Wang ◽  
Z.W. Fan ◽  
J. Yu ◽  
Z.H. Shi ◽  
T.Z. Zhao ◽  
...  
Keyword(s):  
Pulse Energy ◽  
High Efficiency ◽  
Beam Quality ◽  
High Energy ◽  
Gain Medium ◽  
Small Scale ◽  
Regenerative Amplifier ◽  
Amplification Ratio ◽  
Focusing Effect ◽  
Good Beam Quality

To obtain high energy, high efficiency Nd: glass preamplifier used in certain host device, a Nd:glass regenerative amplifier system has been designed. By adjusting the single pass gain and carefully optimizing the cavity mode, the small-scale self-focusing effect in the gain medium was effectively controlled. Maximum pulse energy of 21mJ, pulse width of 2.6ns was obtained at the repetition frequency of 1Hz, corresponding to a high optical to optical conversion efficiency of 11% and amplification ratio of 108. The pulse to pulse energy stability was < 2% rms during 2 h continous operation. The laser has a good beam quality of M2=1.5. The spectrum was measured to be at center wavelength of 1052.915nm.

scholarly journals High-efficiency 50 W burst-mode hundred picosecond green laser

2020 ◽  
Vol 8 ◽  
Author(s):  
Ning Ma ◽  
Meng Chen ◽  
Ce Yang ◽  
Shang Lu ◽  
Xie Zhang ◽  
...  
Keyword(s):  
Near Infrared ◽  
High Efficiency ◽  
Second Harmonic ◽  
Beam Quality ◽  
Average Power ◽  
High Energy ◽  
Green Laser ◽  
Type I ◽  
Regenerative Amplifier ◽  
Burst Mode

We report high-energy, high-efficiency second harmonic generation in a near-infrared all-solid-state burst-mode picosecond laser at a repetition rate of 1 kHz with four pulses per burst using a type-I noncritical phase-matching lithium triborate crystal. The pulses in each burst have the same time delay ( ${\sim}1~\text{ns}$ ), the same pulse duration ( ${\sim}100~\text{ps}$ ) and different relative amplitudes that can be adjusted separately. A mode-locked beam from a semiconductor saturable absorber mirror is pulse-stretched, split into seed pulses and injected into a Nd:YAG regenerative amplifier. After the beam is reshaped by aspheric lenses, a two-stage master oscillator power amplifier and 4f imaging systems are applied to obtain a high power of ${\sim}100~\text{W}$ . The 532 nm green laser has a maximum conversion efficiency of 68%, an average power of up to 50 W and a beam quality factor $M^{2}$ of 3.5.

scholarly journals Petawatt Femtosecond Laser Pulses from Titanium-Doped Sapphire Crystal

Crystals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 783
Author(s):  
Hiromitsu Kiriyama ◽  
Alexander S. Pirozhkov ◽  
Mamiko Nishiuchi ◽  
Yuji Fukuda ◽  
Akito Sagisaka ◽  
...  
Keyword(s):  
High Intensity ◽  
Short Pulse ◽  
Beam Quality ◽  
Laser Pulses ◽  
High Energy ◽  
Femtosecond Laser Pulses ◽  
Small Scale ◽  
Sapphire Crystal ◽  
Chirped Pulse Amplification ◽  
Ultra Short Pulse

Ultra-high intensity femtosecond lasers have now become excellent scientific tools for the study of extreme material states in small-scale laboratory settings. The invention of chirped-pulse amplification (CPA) combined with titanium-doped sapphire (Ti:sapphire) crystals have enabled realization of such lasers. The pursuit of ultra-high intensity science and applications is driving worldwide development of new capabilities. A petawatt (PW = 1015 W), femtosecond (fs = 10−15 s), repetitive (0.1 Hz), high beam quality J-KAREN-P (Japan Kansai Advanced Relativistic ENgineering Petawatt) Ti:sapphire CPA laser has been recently constructed and used for accelerating charged particles (ions and electrons) and generating coherent and incoherent ultra-short-pulse, high-energy photon (X-ray) radiation. Ultra-high intensities of 1022 W/cm2 with high temporal contrast of 10−12 and a minimal number of pre-pulses on target has been demonstrated with the J-KAREN-P laser. Here, worldwide ultra-high intensity laser development is summarized, the output performance and spatiotemporal quality improvement of the J-KAREN-P laser are described, and some experimental results are briefly introduced.

A High-Energy Good-Beam-Quality Krypton-Lamp-Pumped Nd:YAG Solid-State Laser with One Pump Cavity

2008 ◽  
Vol 25 (2) ◽  
pp. 521-523 ◽  
Author(s):  
Liu Xue-Sheng ◽  
Wang Zhi-Yong ◽  
Yan Xin ◽  
Cao Ying-Hua
Keyword(s):  
Solid State ◽  
Beam Quality ◽  
High Energy ◽  
Solid State Laser ◽  
State Laser ◽  
Good Beam Quality ◽  
Pump Cavity

scholarly journals 880-nm-Diode-Laser-End-Pumped Electrooptically Q-Switched Nd:YLF Laser With High Energy and Good Beam Quality at 1047 nm and 1 kHz

2016 ◽  
Vol 8 (1) ◽  
pp. 1-8
Author(s):  
Zilong Zhang ◽  
Qiang Liu ◽  
Mingming Nie ◽  
Encai Ji ◽  
Mali Gong
Keyword(s):  
Diode Laser ◽  
Beam Quality ◽  
High Energy ◽  
Good Beam Quality

scholarly journals 500-kHz Level High Energy Double-Pass Nd:YVO4 Picosecond Amplifier with Optic–Optic Efficiency of 51%

2019 ◽  
Vol 9 (2) ◽  
pp. 219
Author(s):  
Xuesheng Liu ◽  
Huan He ◽  
Yiheng Song ◽  
Congcong Wang ◽  
Zhiyong Wang
Keyword(s):  
Pulse Energy ◽  
Beam Quality ◽  
Maximum Output Power ◽  
Picosecond Laser ◽  
Output Pulse ◽  
High Energy ◽  
Maximum Output ◽  
High Pulse Energy ◽  
Double Pass ◽  
High Pulse

We have demonstrated a high pulse energy and high optic–optic efficiency double-pass picosecond (ps) master oscillator power amplifier system of 1064 nm at a pulse repetition rate of 500 kHz. A 500 kHz, 7.68 μJ picosecond laser is used as the seed laser. Through one stage double-pass traveling-wave amplifier, a maximum output power of 16.19 W at a pump power of 31.7 W is generated with the optic–optic efficiency of 51.07%. The output pulse duration is 17.6 ps, corresponding to the pulse energy of 32.38 μJ. The beam quality factor M 2 were measured to be 1.28 and 1.17 along the x, y axis direction, respectively.

400-Hz pulsed single-longitudinal-mode Nd:YAG laser with more than 100-mJ pulse energy and good beam quality

Laser Physics ◽  
2010 ◽  
Vol 21 (1) ◽  
pp. 52-56 ◽  
Author(s):  
L. Tong ◽  
Z. Zhao ◽  
L. Cui ◽  
C. Liu ◽  
J. Chen ◽  
...  
Keyword(s):  
Pulse Energy ◽  
Nd:Yag Laser ◽  
Beam Quality ◽  
Longitudinal Mode ◽  
Single Longitudinal Mode ◽  
Good Beam Quality

Nd:Glass Ring Regenerative Amplifier Using Telescopic Geometry for High Output Energy with Good Beam Quality

1998 ◽  
Vol 37 (Part 2, No. 5B) ◽  
pp. L583-L586
Author(s):  
Tae Moon Jeong ◽  
Eung Cheol Kang ◽  
Byung Tai Kim ◽  
Chang Hee Nam
Keyword(s):  
Beam Quality ◽  
Output Energy ◽  
Regenerative Amplifier ◽  
Good Beam Quality ◽  
High Output

scholarly journals 1.3 µm dissipative soliton resonance generation in Bismuth doped fiber laser

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
H. Ahmad ◽  
S. N. Aidit ◽  
S. I. Ooi ◽  
M. Z. Samion ◽  
S. Wang ◽  
...  
Keyword(s):  
Pump Power ◽  
Fiber Laser ◽  
Pulse Energy ◽  
Signal To Noise Ratio ◽  
Maximum Output Power ◽  
High Energy ◽  
Gain Medium ◽  
Dissipative Soliton ◽  
Maximum Output ◽  
Soliton Resonance

AbstractIn this work, a Figure-9 (F9) bismuth-doped fiber laser (BiDFL) operating in the dissipative soliton resonance (DSR) regime is presented. The 1338 nm laser used a BiDF as the active gain medium, while a nonlinear amplifying loop mirror (NALM) in an F9 configuration was employed to obtain high energy mode-locked pulses. The wave breaking-free rectangular pulse widened significantly in the time domain with the increase of the pump power while maintaining an almost constant peak power of 0.6 W. At the maximum pump power, the mode-locked laser delivered a rectangular-shaped pulse with a duration of 48 ns, repetition rate of 362 kHz and a radio-frequency signal-to-noise ratio of more than 60 dB. The maximum output power was recorded at around 11 mW with a corresponding pulse energy of 30 nJ. This is, to the best of the author’s knowledge, the highest mode-locked pulse energy obtained at 1.3 μm as well as the demonstration of an NALM BiDFL in a F9 configuration.

High Energy and High Efficiency NdGlass Regenerative Amplifier

2012 ◽  
Vol 39 (8) ◽  
pp. 0802002
Author(s):  
王小发 Wang Xiaofa ◽  
樊仲维 Fan Zhongwei ◽  
余锦 Yu Jin ◽  
石朝辉 Shi Zhaohui ◽  
赵天卓 Zhao Tianzhuo ◽  
...  
Keyword(s):  
High Efficiency ◽  
High Energy ◽  
Regenerative Amplifier
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