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.

scholarly journals Graphene slurry based passive Q-switcher in erbium doped fiber laser

2019 ◽  
Vol 8 (4) ◽  
Author(s):  
Siti Nur Fatin Zuikafly ◽  
Nor Farhah Razak ◽  
Rizuan Mohd Rosnan ◽  
Sulaiman Wadi Harun ◽  
Fauzan Ahmad
Keyword(s):  
Pump Power ◽  
Fiber Laser ◽  
Pulse Width ◽  
Peak Power ◽  
Signal To Noise Ratio ◽  
Pulsed Laser ◽  
Laser Cavity ◽  
Signal To Noise ◽  
Maximum Pulse Energy ◽  
Erbium Doped

In this work, a Graphene slurry based passive Q-switcher fabricated from Graphene-Polylactic acid (PLA) filament which is used for 3D printing. To produce the Graphene slurry, the diameter of the filament was reduced and Tetrahydrofuran (THF) was used to dissolve the PLA. The Graphene-THF suspension was drop cast to the end of a fiber ferrule and the THF then evaporated to develop Graphene slurry based SA which is integrated in fiber laser cavity. At threshold input pump power of 30.45 mW, a Q-switched Erbium-doped fiber laser (EDFL) can be observed with the wavelength centered at 1531.01 nm and this remained stable up to a pump power of 179.5 mW. As the pump power was increased gradually, an increase in the repetition rates was recorded from 42 kHz to 125 kHz, while the pulse width was reduced to 2.58 μs from 6.74 μs. The Q-switched laser yielded a maximum pulse energy and peak power of 11.68 nJ and 4.16 mW, respectively. The proposed Graphene slurry based saturable absorber also produced a signal-to-noise ratio of 44 dB indicating a stable Q-switched pulsed laser.

Fast and stable enhancement of the far-field peak power by use of an intracavity deformable mirror

2010 ◽  
Vol 100 (3) ◽  
pp. 591-595 ◽  
Author(s):  
P. Yang ◽  
X. Lei ◽  
R. Yang ◽  
M. Ao ◽  
L. Dong ◽  
...  
Keyword(s):  
Peak Power ◽  
Deformable Mirror ◽  
Far Field ◽  
Field Peak

scholarly journals A waveguide metasurface based quasi-far-field transverse-electric superlens

2021 ◽  
Vol 4 (10) ◽  
pp. 210013-210013
Author(s):  
Yechuan Zhu ◽  
◽  
Xiaolin Chen ◽  
Weizheng Yuan ◽  
Zhiqin Chu ◽  
...  
Keyword(s):  
Transverse Electric ◽  
Far Field

scholarly journals Axicons for mode conversion in high peak power, higher-order mode, fiber amplifiers

2015 ◽  
Vol 23 (26) ◽  
pp. 33849 ◽  
Author(s):  
J.W. Nicholson ◽  
A. DeSantolo ◽  
P.S. Westbrook ◽  
R.S. Windeler ◽  
T. Kremp ◽  
...  
Keyword(s):  
Peak Power ◽  
Mode Conversion ◽  
Higher Order ◽  
Fiber Amplifiers ◽  
High Peak ◽  
High Peak Power ◽  
Order Mode ◽  
Higher Order Mode

Transverse Electric Discharges in Supersonic Air Flows: Mechanisms of Discharge Propagation and Instability

2004 ◽  
Vol 42 (4) ◽  
pp. 516-522 ◽  
Author(s):  
A. P. Ershov ◽  
O. S. Surkont ◽  
I. B. Timofeev ◽  
V. M. Shibkov ◽  
V. A. Chernikov
Keyword(s):  
Transverse Electric ◽  
Electric Discharges ◽  
Air Flows ◽  
Discharge Propagation
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