Development of High Energy, Picosecond Lasers with Kilowatt Average Power

2018 ◽  
Author(s):  
Cory M. Baumgarten ◽  
Han Chi ◽  
Krisitan Dehne ◽  
Elzibeta Jankowska ◽  
Herman Bravo ◽  
...  
Keyword(s):  
Average Power ◽  
High Energy ◽  
Picosecond Lasers

scholarly journals Scaling diode-pumped, high energy picosecond lasers to kilowatt average powers

2018 ◽  
Vol 6 ◽  
Author(s):  
Brendan A. Reagan ◽  
Cory Baumgarten ◽  
Elzbieta Jankowska ◽  
Han Chi ◽  
Herman Bravo ◽  
...  
Keyword(s):  
Repetition Rate ◽  
Average Power ◽  
High Energy ◽  
High Repetition Rate ◽  
Full Characterization ◽  
High Repetition ◽  
Diode Pumped ◽  
Picosecond Lasers ◽  
Active Mirror

Recent results in the development of diode-driven high energy, high repetition rate, picosecond lasers, including the demonstration of a cryogenic Yb:YAG active mirror amplifier that produces 1.5 J pulses at 500 Hz repetition rate (0.75 kW average power) are reviewed. These pulses are compressed resulting in the generation of ${\sim}5~\text{ps}$ duration, 1 J pulses with 0.5 kW average power. A full characterization of this high power cryogenic amplifier, including at-wavelength interferometry of the active region under ${>}1~\text{kW}$ average power pump conditions, is presented. An initial demonstration of operation at 1 kW average power (1 J, 1 kHz) is reported.

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

A Bandwidth and Frequency Calibration Method for OOK UWB-IR Transmitter with High Energy Efficiency

2019 ◽  
Vol 29 (09) ◽  
pp. 2050137
Author(s):  
Shengxi Diao ◽  
Fujiang Lin ◽  
Yuanjin Zheng
Keyword(s):  
Power Efficiency ◽  
Average Power ◽  
Calibration Method ◽  
High Energy ◽  
Impulse Radio ◽  
Ultra Wideband ◽  
Lc Oscillator ◽  
Data Rates ◽  
Pvt Variations ◽  
Frequency Calibration

In this paper, an offline bandwidth and frequency calibration method for an on–off LC oscillator-based ultra-wideband impulse radio (UWB-IR) transmitter is presented. Implemented in 0.18-[Formula: see text]m CMOS, the offline calibration circuits consume very little power. This allows the transmitter to consume an ultra-low average power of 319[Formula: see text][Formula: see text]W over 3–5[Formula: see text]GHz at 2[Formula: see text]Mbps. The calibration is critical to ensure the FCC spectral mask compliance despite the process–voltage–temperature (PVT) variations. The transmitter can deliver a large differential output swing of 1.8–3[Formula: see text]V to a 100-[Formula: see text] load with minimal power efficiency of 7% at different data rates (2–30[Formula: see text]Mbps). It is suitable for WPAN application with localization and positioning capabilities.

scholarly journals Direct Amplification of High Energy Pulsed Laser in Fiber-Single Crystal Fiber with High Average Power

Crystals ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 216
Author(s):  
Feng Li ◽  
Zhi Yang ◽  
Zhiguo Lv ◽  
Yang Yang ◽  
Yishan Wang ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Single Crystal ◽  
Stimulated Raman Scattering ◽  
Average Power ◽  
High Energy ◽  
Laser Source ◽  
High Average Power ◽  
Double Pass ◽  
Two Stage ◽  
Crystal Fiber

A laser master oscillator power amplifier (MOPA) system consisting of a fiber amplifier and a two-stage Yb:YAG single crystal fiber (SCF) is experimentally studied. The nonlinear stimulated Raman scattering (SRS) is avoided by limiting the output power of the fiber preamplifier to 600 mW. Due to the benefit from the low nonlinearity and high amplification gain of the SCF, a laser pulse duration of 16.95 ps and a high average power of 41.7 W at a repetition rate of 250 kHz are obtained by using a two-stage polarization controlled double-pass amplification of Yb:YAG SCF, corresponding to an output energy of 166.8 μJ and a peak power of 9.84 MW, respectively. The polarization controlled SCF amplification scheme achieved a gain as high as more than 69 times. During the amplification, the spectra gain narrowing effect and the polarization controlled four-pass amplification setup are also studied. The laser spectrum is narrowed from over 10 nm to less than 3 nm, and the pulse width is also compressed to hundreds of femtosecond by dechirping the laser pulse. This compact-sized, cost-effective laser source can be used in laser micromachining, or as the seeder source for generating much higher power and energy laser for scientific research. For some applications which need femtosecond laser, this laser source can also be compressed to femtosecond regime.

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 High energy and average power femtosecond laser for driving mid-infrared optical parametric amplifiers

2013 ◽  
Vol 38 (15) ◽  
pp. 2746 ◽  
Author(s):  
P. Malevich ◽  
G. Andriukaitis ◽  
T. Flöry ◽  
A. J. Verhoef ◽  
A. Fernández ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Average Power ◽  
High Energy ◽  
Parametric Amplifiers ◽  
Mid Infrared ◽  
Optical Parametric ◽  
Optical Parametric Amplifiers
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