Tunable resonantly pumped Er:GGAG laser

Laser Physics ◽  
2021 ◽  
Vol 32 (1) ◽  
pp. 015802
Author(s):  
M Němec ◽  
P Boháček ◽  
R Švejkar ◽  
J Šulc ◽  
J Kratochvíl ◽  
...  
Keyword(s):  
Peak Power ◽  
Laser Wavelength ◽  
Maximum Output ◽  
Spectral Bands ◽  
Output Peak Power ◽  
Wavelength Tunability ◽  
Er Doped

Abstract The main goal of this work was to present spectroscopic and laser characteristics including the wavelength tunability of Er-doped Gd3Ga3Al2O12 (Er:GGAG) crystal. Seven Er:GGAG crystals of various Er/Gd concentrations were investigated. The maximum output peak power of 0.99 W with an absorbed pumping peak power amplitude of 5.22 W for the crystal at 0.55 at.% Er/Gd concentration was researched. The tuning was accomplished using a SiO2 birefringent plate. The laser wavelength was tunable in three eye-safe spectral bands from 1609 to 1650 nm.

Laser-Induced Acoustic Waves for Measurement and Imaging

2000 ◽  
Author(s):  
Wen Li ◽  
Ronald A. Roy ◽  
Robin O. Cleveland ◽  
Lawrence J. Berg ◽  
Charles A. DiMarzio
Keyword(s):  
Acoustic Waves ◽  
Peak Power ◽  
Laser Light ◽  
Short Pulse ◽  
Laser Wavelength ◽  
Acoustic Imaging ◽  
Acoustic Energy ◽  
High Peak Power ◽  
First Case ◽  
Very High

Abstract A short pulse of laser light can act as a source of acoustic energy for acoustic imaging. Although there are a number of mechanisms by which the light pulse may generate sound, all require a pulse of high peak power density and short duration. In this work, we address examples where the material is highly absorbing at the laser wavelength, and the sound is generated near the surface. In these cases, there exist two different mechanisms which can convert the light to sound. The first is heating followed by expansion, and the second is generation of a plasma in the air above the surface. In the first case, sound generation occurs in the medium of interest and the energy efficiency can be very high, in the sense that no reflection losses occur. We present two applications from our own research.

Record laser wavelength tunability of Pr:LiYF4 around 900nm

2015 ◽  
Author(s):  
B. Qu ◽  
R. Moncorgé ◽  
Zh. Cai ◽  
J.L. Doualan ◽  
B. Xu ◽  
...  
Keyword(s):  
Laser Wavelength ◽  
Wavelength Tunability

WIDELY-TUNABLE, MONOCHROMATIC, AND HIGH-POWER TERAHERTZ SOURCES AND THEIR APPLICATIONS

2003 ◽  
Vol 12 (04) ◽  
pp. 557-585 ◽  
Author(s):  
YUJIE J. DING ◽  
WEI SHI
Keyword(s):  
Peak Power ◽  
Difference Frequency Generation ◽  
Thz Radiation ◽  
Narrow Linewidth ◽  
Nonlinear Materials ◽  
Peak Output Power ◽  
Output Peak Power ◽  
Conversion Efficiencies ◽  
Coherence Lengths ◽  
High Coherence

We have demonstrated that coherent terahertz (THz) waves can be efficiently generated and tuned in extremely-wide ranges based on phase-matched difference-frequency generation (DFG) in second-order nonlinear materials. Among all the nonlinear crystals available, we have chosen GaSe and ZnGeP 2, which correspond to two of the best nonlinear materials for the efficient THz generation. This is due to the fact that these two materials have the lowest and next-to-lowest absorption coefficients in the THz domain. In addition, they possess large nonlinear coefficients. For a single GaSe crystal, continuously-tunable and coherent radiation in the extremely-wide ranges of 2.7–38.4 μ m and 58.2–3540 μ m has been achieved. Hence, a novel and promising THz source is finally available. This source has the additional advantages of high coherence (narrow linewidth) and simple alignment. The peak output power for the THz radiation reaches 209 W at the wavelength of 196 μ m (1.53 THz), which corresponds to a power conversion efficiency of 0.055%. On the other hand, for a single ZnGeP 2 crystal we have efficiently generated a monochromatic THz wave continuously-tunable in the ranges of 83.1–1642 μ m and 80.2–1416 μ m . The highest output peak power achieved so far is 134 W. We have also investigated how to use THz waveguides and long coherence lengths for improving the conversion efficiencies. We have reviewed our results on some important applications using these unique sources.

A Micro Direct Formic Acid Fuel Cell with PDMS Fluid Flow Plates

2015 ◽  
Vol 645-646 ◽  
pp. 724-729 ◽  
Author(s):  
Ting Ting Wang ◽  
Yi Bo Zeng ◽  
Zu Guang Zhao ◽  
Hang Guo
Keyword(s):  
Fluid Flow ◽  
Fuel Cell ◽  
Formic Acid ◽  
Peak Power ◽  
Peak Power Output ◽  
Maximum Output ◽  
Formic Acid Solution ◽  
Input Concentration ◽  
Direct Methanol ◽  
Methanol Fuel Cell

Micro direct formic acid fuel cell (DFAFC) is currently one of the promising technologies to power micro/nano devices and systems. Compared with micro direct methanol fuel cell (DMFC), micro (DFAFC) can have higher proton conductivity and energy density, and crossover of formic acid through Nafion membrane is significantly less than methanol. In this paper, a micro DFAFC has been developed. Polydimethylsiloxane (PDMS) is chosen as the material for fluid flow plates in both cathode and anode of the micro DFAFC in order to simplify its structure and improve its packaging performance. The developed micro DFAFC has been tested and results show that its input concentration of formic acid solution can reach up to 10mol/L with its peak power output of 13.6mW/cm2 and maximum output current of 97.66mA/cm2.

scholarly journals Cladding-pumped 70-kW-peak-power 2-ns-pulse Er-doped fiber amplifier

2018 ◽  
Author(s):  
Maxim M. Khudyakov ◽  
Mikhail M. Bubnov ◽  
Andrey K. Senatorov ◽  
Denis S. Lipatov ◽  
Mikhail E. Likhachev ◽  
...  
Keyword(s):  
Peak Power ◽  
Fiber Amplifier ◽  
Er Doped

High Peak-Power Pulse Amplification in Very-Large Mode-Area Er-doped Amplifiers

2021 ◽  
Author(s):  
J. W. Nicholson ◽  
A. DeSantolo ◽  
C. Jin ◽  
M. Yan ◽  
P. Wisk ◽  
...  
Keyword(s):  
Peak Power ◽  
High Peak ◽  
High Peak Power ◽  
Large Mode Area ◽  
Pulse Amplification ◽  
Power Pulse ◽  
Er Doped ◽  
Mode Area

107-kW-Peak-Power 2-ns Pulse Tapered Er-doped Fiber Amplifier

2018 ◽  
Author(s):  
M. M. Khudyakov ◽  
A. E. Levchenko ◽  
V. V. Velmiskin ◽  
K. K. Bobkov ◽  
D. S. Lipatov ◽  
...  
Keyword(s):  
Peak Power ◽  
Fiber Amplifier ◽  
Er Doped

Double-clad large mode area Er-doped fiber for high-energy and high-peak power amplifiers

2014 ◽  
Author(s):  
Leonid V. Kotov ◽  
Mikhail M. Bubnov ◽  
Denis S. Lipatov ◽  
Alexei N. Guryanov ◽  
Sébastien Février ◽  
...  
Keyword(s):  
Power Amplifiers ◽  
Peak Power ◽  
High Energy ◽  
High Peak ◽  
High Peak Power ◽  
Large Mode Area ◽  
Er Doped ◽  
Mode Area

scholarly journals High Peak Power Er-doped Tapered Fiber Amplifier

2018 ◽  
Author(s):  
M. M. Khudyakov ◽  
A. E. Levchenko ◽  
V. V. Velmiskin ◽  
K. K. Bobkov ◽  
D. S. Lipatov ◽  
...  
Keyword(s):  
Peak Power ◽  
Fiber Amplifier ◽  
High Peak ◽  
High Peak Power ◽  
Tapered Fiber ◽  
Er Doped

scholarly journals Passively Q-Switched Yb:CALGO Laser Based on Mo:BiVO4 Absorber

Nanomaterials ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 2364
Author(s):  
Lina Zhao ◽  
Ye Yuan ◽  
Luyang Tong ◽  
Wenyu Zhang ◽  
Zhongshuai Zhang ◽  
...  
Keyword(s):  
Repetition Rate ◽  
Peak Power ◽  
Near Infrared ◽  
Maximum Output Power ◽  
Single Pulse ◽  
Infrared Region ◽  
Maximum Output ◽  
Linear Absorption ◽  
Central Wavelength ◽  
Transmission Electron

A stable, passively Q-switched Yb:CaGdAlO4 laser based on Mo:BiVO4 saturable absorber was demonstrated. Close observations of the structure and morphology of the nanoparticles by using transmission electron microscope, Raman spectrum and linear absorption were measured. The nonlinear transmission of Mo:BiVO4 was characterized by a 30 ps laser with a central wavelength of 1064 nm and a repetition rate of 10 Hz. The experimental maximum output power of the pulsed laser was 510 mW with a repetition rate of 87 kHz and pulse width of 3.18 μs, corresponding to a peak power of 1.84 W and a single pulse energy of 5.8 μJ. The experimental results indicate that Mo:BiVO4-SA is a great candidate for passively Q-switched lasers in the near infrared region.

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