output coupler
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2022 ◽  
Vol 128 (2) ◽  
Author(s):  
Umit Demirbas ◽  
Franz X. Kärtner ◽  
Mikhail Pergament

AbstractWe report nanosecond (ns) cavity-dumped operation of a low-cost diode-pumped Cr:LiSAF laser around 1000 nm. The system is pumped with one 1-W single-emitter multimode diode at 665 nm. A Pockell cell (PC) and thin-film-polarizer (TFP) combination placed inside the cavity chops up an adjustable portion of the intracavity power and creates a variable time-dependent output coupler. Via adjusting the length and magnitude of the electrical signal going into the PC, output pulses with pulsewidths in the 2.5–500 ns range and with peak power levels above 10 W are generated at repetition rates up to 100 kHz. The central wavelength of the pulses could be smoothly tuned in the 985–1030 nm region, and is only limited by the anti-reflection coating bandwidth of the current PC and TFP. This versatile nanosecond source with 100 nJ level energies could serve as an attractive low-cost seed source for Yb-based amplifiers, including the cryogenic Yb:YLF systems.


2021 ◽  
Author(s):  
Jan Geberbauer ◽  
William Kerridge-Johns ◽  
Michael Damzen
Keyword(s):  

Author(s):  
Jan W T Geberbauer ◽  
William R Kerridge-Johns ◽  
Michael J Damzen
Keyword(s):  

2021 ◽  
Vol 71 (03) ◽  
pp. 337-340
Author(s):  
Talur Chanakya ◽  
N. K. Manker ◽  
V. B. Naidu ◽  
S. K. Datta

Study of multipaction breakdown margins in the output connector of a travelling-wave tube (TWT) is essential for application in satellite-borne systems. A TWT uses a coaxial ceramic window, a coaxial output coupler and / or a waveguide output coupler that are prone to multipaction breakdown boosted by high RF power due to the ion accumulation in critical regions during the transition of the satellite through plasma pockets in space. A detailed procedure for estimating the multipaction susceptibility margins in a TWT using CST studio and analytical equations is presented in this paper, and output couplers of two typical TWTs are analysed and the results are presented.


Optik ◽  
2021 ◽  
Vol 227 ◽  
pp. 166112
Author(s):  
Jian-Jian Ruan ◽  
Yi Zhuang ◽  
Qi Chen ◽  
Hong-Yi Lin ◽  
Hong Liu ◽  
...  
Keyword(s):  

2021 ◽  
Author(s):  
Yung-Fu Chen ◽  
Di Li ◽  
Y. M. Lee ◽  
C. C. Lee ◽  
H. Y. Huang ◽  
...  

2021 ◽  
Vol 9 ◽  
Author(s):  
Disheng Wei ◽  
Shuyi Mi ◽  
Ke Yang ◽  
Junhui Li ◽  
Jinwen Tang ◽  
...  

Abstract We demonstrated a 202 W Tm:YLF slab laser using a reflecting volume Bragg grating (VBG) as an output coupler at room temperature. Two kinds of active heat dissipation methods were used for the VBG to suppress the shift of wavelength caused by its increasing temperature. The maximum continuous wave (CW) output power of 202 W using the microchannel cooling was obtained under the total incident pump power of 553 W, the corresponding slope efficiency and optical-to-optical conversion efficiency were 39.7% and 36.5%, respectively. The central wavelength was 1908.5 nm with the linewidth (full width at half maximum) of 0.57 nm. Meanwhile, with the laser output increasing from 30 to 202 W, the total shift was about 1.0 nm, and the wavelength was limited to two water absorption lines near 1908 nm. The beam quality factors M2 were measured to be 2.3 and 4.0 in x and y directions at 202 W.


2020 ◽  
Vol 41 (4) ◽  
pp. 434-440
Author(s):  
S. I. Derzhavin ◽  
V. P. Yakunin ◽  
R. V. Grishaev ◽  
Y. V. Kravchenko ◽  
D. N. Mamonov ◽  
...  

2020 ◽  
Vol 126 ◽  
pp. 106070
Author(s):  
Z. Montz ◽  
A. Shirakov ◽  
U. Ben Ami ◽  
S. Genish ◽  
A.A. Ishaaya

Author(s):  
Jan Willem T. Geberbauer ◽  
William Kerridge-Johns ◽  
Michael J. Damzen

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