Enhanced peak power and short pulse operation of planar waveguide CO2 lasers

2001 ◽  
Vol 78 (16) ◽  
pp. 2276-2278 ◽  
Author(s):  
F. Villarreal ◽  
P. R. Murray ◽  
H. J. Baker ◽  
D. R. Hall
Keyword(s):  
Planar Waveguide ◽  
Peak Power ◽  
Short Pulse ◽  
Co2 Lasers ◽  
Pulse Operation ◽  
Waveguide Co2 Lasers

Photonic-crystal lasers with two-dimensionally arranged gain and loss sections for high-peak-power short-pulse operation

2021 ◽  
Vol 15 (4) ◽  
pp. 311-318 ◽  
Author(s):  
Ryohei Morita ◽  
Takuya Inoue ◽  
Menaka De Zoysa ◽  
Kenji Ishizaki ◽  
Susumu Noda
Keyword(s):  
Photonic Crystal ◽  
Peak Power ◽  
Short Pulse ◽  
High Peak ◽  
High Peak Power ◽  
Pulse Operation ◽  
Gain And Loss

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.

Versatile High-Energy and Short-Pulse Operation of PHELIX

2009 ◽  
pp. 53-58 ◽  
Author(s):  
T. Kuehl ◽  
V. Bagnoud ◽  
C. Bruske ◽  
S. Borneis ◽  
B. Ecker ◽  
...  
Keyword(s):  
Short Pulse ◽  
High Energy ◽  
Pulse Operation

Periodic Nanostructures

2000 ◽  
Vol 214 (9) ◽  
Author(s):  
O. Apel ◽  
F. Beinhorn ◽  
J. Ihlemann ◽  
J.-H. Klein-Wiele ◽  
G. Marowsky ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Time Resolution ◽  
Planar Waveguide ◽  
Short Pulse ◽  
Uv Laser ◽  
Ablation Process ◽  
Periodic Nanostructures

We report on the fabrication of periodic nanostructures on selected materials by short-pulse uv-laser ablation. Temporal studies reveal details of the ablation process with sub-picosecond time resolution. Biochemical applications of the nanostructures for planar waveguide technology are presented.

Short-Pulse Operation of Infrared Windows Without Thermal Defocusing

1973 ◽  
Vol 12 (9) ◽  
pp. 2033_1 ◽  
Author(s):  
M. Sparks
Keyword(s):  
Short Pulse ◽  
Pulse Operation

Helical TEA-CO2 Lasers

1971 ◽  
Vol 49 (13) ◽  
pp. 1783-1793 ◽  
Author(s):  
R. Fortin ◽  
M. Gravel ◽  
R. Tremblay
Keyword(s):  
Peak Power ◽  
Transverse Electric ◽  
Laser Cavity ◽  
Electric Discharges ◽  
Far Field ◽  
Order Mode ◽  
Co2 Lasers ◽  
Lens Effect ◽  
Gain Profile ◽  
Helical Electrode

A transversely excited atmospheric TEA–CO2 laser having a helical electrode configuration is described and analyzed. This laser configuration possesses a radial gain profile which naturally favors the excitation of the lowest-order mode of the resonator. Pulses of 0.7 J, having a peak power close to 1 MW, have been obtained in the fundamental mode. However, a strong diverging lens effect caused by the transverse electric discharges in the laser cavity produces a far field beam divergence twice as small as that calculated from the geometry of the resonator. This lens effect has also been used to lase with some geometrically unstable cavities. Two independent types of measurements, performed to study this lens effect, are shown to agree with a proposed theoretical model.

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