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WANG Zhen, HAN Mengmeng, PENG Hao, TANG Xiahui. Research of adaptive regulation of shaping optics in radio frequency slab CO2 lasers[J]. LASER TECHNOLOGY, 2015, 39(4): 471-475. DOI: 10.7510/jgjs.issn.1001-3806.2015.04.009
Citation: WANG Zhen, HAN Mengmeng, PENG Hao, TANG Xiahui. Research of adaptive regulation of shaping optics in radio frequency slab CO2 lasers[J]. LASER TECHNOLOGY, 2015, 39(4): 471-475. DOI: 10.7510/jgjs.issn.1001-3806.2015.04.009

Research of adaptive regulation of shaping optics in radio frequency slab CO2 lasers

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  • Received Date: July 24, 2014
  • Revised Date: February 07, 2015
  • Published Date: July 24, 2015
  • In order to solve the problem of the output beam offsets induced by assembling and heat distortion of mirrors in radio frequency slab CO2 lasers, offsets were compensated by means of the outside optics. An offset compensation device was designed based on piezoelectric ceramics. Piezoelectric ceramics actuators were designed and the control accuracy and adaptive control method were analyzed. The results show that laser output power at any duty ratio can meet or exceed the standard reference power value after compensation. The maximum difference of output power is 100W before and after adaptive regulation and the laser output power fluctuation is less than 2% during the running of 2h. The output beam compensation can ensure laser run efficiently, increase the stability of laser power and laser mode. The research has the high practical value.
  • [1]
    HAN M M. Researches on compensation of shaping optics for RF slab CO2 laser[D]. Wuhan: Huazhong University of Science Technology, 2014:5-8(in Chinese).
    [2]
    XIAO L Sh. Researches on the beam shaping characteristics of the 2kW RF slab CO2 laser[D]. Wuhan: Huazhong University of Science Technology, 2014:7-12(in Chinese).
    [3]
    PANAHPOUR A, SOLTANIFARD M T, SHIRMAHI M, et al. Output characteristics of a planer RF-excited CO2 laser with unstable-waveguide hybrid resonator[J].Proceedings of the SPIE, 2005, 5777:460-463.
    [4]
    WEI X Y, WU N L, LI Sh Q. Theoretical investigations on the maladjustment of unstable-stable hybrid resonator[J].Chinese Journal of Quantum Electronics, 2006, 23(1): 37-41(in Chinese).
    [5]
    MINEEV A P, NEFEDOV S M, PASHININ P P. RF excited planar CO2 laser with hybrid waveguide-unstable resonator cavities[J].Proceedings of the SPIE, 1999,3686:35-42.
    [6]
    WANG D. Beam characteristic and its thermal stability of the radio frequency-excited slab CO2 laser[D]. Wuhan: Huazhong University of Science Technology, 2013:6-13(in Chinese).
    [7]
    PENG Sh P, WANG W G, YU H J. Design of a control system of fast reflector in a laser autocollimator[J]. Laser Technology, 2013, 37(4):431-436(in Chinese).
    [8]
    XIE H B, LU E Y, ZHU X Ch, et al. Shaping and collimation of LD beam with astigmatism[J]. Laser Technology, 2013, 37(4):551-555(in Chinese).
    [9]
    KARMAN G P, WOERDMAN J P. Fractal structure of eigenmodes of unstable-cavity lasers[J]. Optical Letters, 1998, 23(24) : 1909-1911.
    [10]
    LIU W, REN X. Large piezoelectric effect in Pb-free ceramics[J]. Physical Review Letters, 2009, 103(25): 257602.
    [11]
    LIU Zh M, OUYANG G Y, LIU Y. Design of a dynamic driving power for large displacement piezoelectric actuator[J]. Chinese Journal of Power Sources, 2011, 35(3): 294-296(in Chinese).
    [12]
    FENG Y X, LI W, WANG Y Q. Present situation and development of power supply for piezoelectric actuator [J]. Instrument Technique and Sensor, 2008(11): 109-112(in Chinese).
    [13]
    GE P, JOUANEH M. Tracking control of a piezoceramic actuator[J]. IEEE Control Systems Technology, 1996, 4(3): 209-216.
    [14]
    CHOI G S, KIM H S, CHOI G H. A study on position control of piezoelectric actuators[C]//Proceedings of the IEEE International Symposium on Industrial Electronics ISIE'97. New York,USA: IEEE, 1997: 851-855.
    [15]
    ZHANG T, SUN L N, CAI H G. Study on the fundamental characteristics of piezoelectric element[J]. Optics and Precision Engineering, 1998, 6(5): 26-32(in Chinese).
    [16]
    CROFT D, SHEDD G, DEVASIA S. Creep, hysteresis, and vibration compensation for piezoactuators[C]//Proceedings of American Control Conference 2000: Atomic Force Microscopy Application. New York,USA:IEEE,2000:2123-2128.

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