Output mode simulation for high-engergy CO2 laser with mirror deformation by means of FFT
-
Received Date:
2005-10-19
Accepted Date:
2006-01-31
-
Abstract
The fast Fourier transform method is used to study the mode field distribution for high-energy CO2 laser induced by the resonator mirror tilt,centre thermal distortion at the mirror and inhomogeneous gain resulting from transverse flow of gain medium.The simulation results indicate that all the above factors influence affect the mode field distribution.However the effect can be reduced by cooling resonator mirrors,adopting new mirror substrate materials,improving the reflective rate of mirror and arranging mirror tilt.
-
-
References
[1]
|
PENG Y F,CHENG Z H,ZHANG Y N et al.Thermal distortion in a super-thin multilayer metal mirror with silicon substrate subjected to irradiation of high power lasers[J].Chinese Journal of Laser,2002,A29(1):21~24(in Chinese). |
[2]
|
PENG Y F,CHENG Z H.Finite element analyses of thermal distortions of mirror substrates for high power lasers[J].High Power Laser and Particle Beams,2005,17 (1):5~8 (in Chinese). |
[3]
|
LÜ B D,FENG G Y,CAI B W.Mode calculation of resonators for slab lasers:fast Fourier transform method[J].Laser Technology,1993,17(6):335~339(in Chinese).v
[4] SZIKLAS E A,SIEGMAN A E.Mode calculation in unstable resonators with flowing saturable gain 2:fast Fourier transform method[J].Appl Opt,1975,14 (8):1874~1889. |
[4]
|
ARMANDILLO E,KAYE A S.Modelling of transverse-folw CW CO2 laser:theory and experiment[J].J Phys,1980,D13 (1):321~338. |
[5]
|
YU D L,SANG F T,JIN Y Q.Output drift and deformation in highpower COIL[J].Opt & Laser Technol,2003,35 (4):245~249. |
[6]
|
YU D L,SANG F T,JIN Y Q et al.Study of drift and deformation for COIL output beam spot[J].High Power Laser and Particle Beams,2001,13(2):151~154(in Chinese). |
[7]
|
HU Y H,DENG N M,HE J H.A mean on laser resonator auto-stability adjustion[J].Acta Photomica Sinica,2001,30 (7):871~874 (in Chinese). |
-
-
Proportional views
-