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.

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.

Green Laser with High Energy, Narrow Pulse Width and High Average Power

2011 ◽  
Vol 48 (11) ◽  
pp. 111403
Author(s):  
李欣荣 Li Xinrong ◽  
孙琦 Sun Qi
Keyword(s):  
Pulse Width ◽  
Average Power ◽  
High Energy ◽  
Green Laser ◽  
High Average Power

High-energy, high-efficiency second-harmonic generation of 1064-nm radiation in KTP

1992 ◽  
Vol 17 (2) ◽  
pp. 109 ◽  
Author(s):  
Andrew J. W. Brown ◽  
Mark S. Bowers ◽  
Ken W. Kangas ◽  
Charles H. Fisher
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
High Efficiency ◽  
Second Harmonic ◽  
High Energy

scholarly journals Conceptual Design of a Laser Driver for a Plasma Accelerator User Facility

Instruments ◽  
2019 ◽  
Vol 3 (3) ◽  
pp. 40 ◽  
Author(s):  
Guido Toci ◽  
Zeudi Mazzotta ◽  
Luca Labate ◽  
François Mathieu ◽  
Matteo Vannini ◽  
...  
Keyword(s):  
Conceptual Design ◽  
Repetition Rate ◽  
Beam Quality ◽  
Laser System ◽  
Average Power ◽  
Ultrashort Pulses ◽  
High Energy ◽  
Plasma Accelerator ◽  
User Facility ◽  
Very High

The purpose of the European project EuPRAXIA is to realize a novel plasma accelerator user facility. The laser driven approach sets requirements for a very high performance level for the laser system: pulse peak power in the petawatt range, pulse repetition rate of several tens of Hz, very high beam quality and overall stability of the system parameters, along with 24/7 operation availability for experiments. Only a few years ago these performances were considered unrealistic, but recent advances in laser technologies, in particular in the chirped pulse amplification (CPA) of ultrashort pulses and in high energy, high repetition rate pump lasers have changed this scenario. This paper discusses the conceptual design and the overall architecture of a laser system operating as the driver of a plasma acceleration facility for different applications. The laser consists of a multi-stage amplification chain based CPA Ti:Sapphire, using frequency doubled, diode laser pumped Nd or Yb solid state lasers as pump sources. Specific aspects related to the cooling strategy of the main amplifiers, the operation of pulse compressors at high average power, and the beam pointing diagnostics are addressed in detail.

scholarly journals A High-Energy, Narrow-Pulse-Width, Long-Wave Infrared Laser Based on ZGP Crystal

Crystals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 656
Author(s):  
Chuanpeng Qian ◽  
Ting Yu ◽  
Jing Liu ◽  
Yuyao Jiang ◽  
Sijie Wang ◽  
...  
Keyword(s):  
Pulse Width ◽  
Beam Quality ◽  
Average Power ◽  
High Energy ◽  
Infrared Laser ◽  
Average Output ◽  
Pump Source ◽  
Long Wave ◽  
Maximal Average ◽  
Long Wave Infrared

In this paper, we present a high-energy, narrow pulse-width, long-wave infrared laser based on a ZnGeP2 (ZGP) optical parametric oscillator (OPO). The pump source is a 2.1 μm three -stage Ho:YAG master oscillator power-amplifier (MOPA). At a repetition frequency of 1 kHz, the Ho:YAG MOPA system outputs the maximal average power of 52.1 W, which corresponds to the shortest pulse width of 14.40 ns. By using the Ho:YAG MOPA system as the pump source, the maximal average output powers of 3.15 W at 8.2 μm and 11.4 W at 2.8 μm were achieved in a ZGP OPO. The peak wavelength and linewidth (FWHM) of the long-wave infrared laser were 8156 nm and 270 nm, respectively. At the maximal output level, the pulse width and beam quality factor M2 were measured to be 8.10 ns and 6.2, respectively.

Robust, Efficient, Optical-Damage-Resistant, 200 mJ Nanosecond Ultraviolet Light Source for Satellite-Based Lidar Applications

2005 ◽  
Vol 883 ◽  
Author(s):  
Darrell J. Armstrong ◽  
Arlee V. Smith
Keyword(s):  
Second Harmonic ◽  
Beam Quality ◽  
High Energy ◽  
Nonlinear Frequency ◽  
Sound Design ◽  
Optical Efficiency ◽  
Optical Damage ◽  
Parametric Oscillators ◽  
Frequency Converters ◽  
Near Ir

AbstractConventional wisdom contends that high-energy nanosecond UV laser sources operate near the optical damage thresholds of their constituent materials. This notion is particularly true for nonlinear frequency converters like optical parametric oscillators, where poor beam quality combined with high intra-cavity fluence leads to catastrophic failure of crystals and optical coatings. The collective disappointment of many researchers supports this contention. However, we're challenging this frustrating paradigm by developing high-energy nanosecondUVsources that are efficient, mechanically robust, and most important, resistant to optical damage. Based on sound design principles developed through numerical modeling and rigorous laboratory testing, our sources generate 8-10 ns 190 mJ pulses at 320 nm with fluences≤ 1 J/cm2. Using the second harmonic of a Q-switched, injection-seeded Nd:YAGlaser as the pump source, we convert the near-IR Nd:YAG fundamental to UV with optical-to-optical efficiency exceeding 21%.

Sign in / Sign up

Export Citation Format

Share Document