Research of a new kind of liquid crystal depolarizer

WANG Jian-jun; LIN Hong-huan; SUI Zhan; DENG Qing-hua; LI Ming-zhong

To cancel the negative influence of the polarization variety of the incident light on a coherent system because,one of the effective methods is to depolarize the incident light.Making use of the characteristic of liquid crystal whose refractive index n along z is various with the deflection orientation of the liquid crystal element,the polarization of the liquid crystal can be arbitrarily controlled by changing the voltage of the liquid crystal and the light can propagate at arbitrary polarization.A new depolarizer composed of two liquid crystal was proposed in the paper.Experimental results show that the liquid crystal depolarizer is insensitive to the polarization state of the incident light and can totally depolarize CW or pulsed monochromatic light with arbitrary polarization states.The depolarizer has the potential to keep the polarization state of the fiber injection laser system of the ICF driver.

1. Laser Fusion Research Center, Chinese Academy of Engineering Physics, Mianyang 621900, China

Received Date: 2006-03-29

Accepted Date: 2006-05-24

Available Online: 2007-06-25

Abstract: To cancel the negative influence of the polarization variety of the incident light on a coherent system because,one of the effective methods is to depolarize the incident light.Making use of the characteristic of liquid crystal whose refractive index n along z is various with the deflection orientation of the liquid crystal element,the polarization of the liquid crystal can be arbitrarily controlled by changing the voltage of the liquid crystal and the light can propagate at arbitrary polarization.A new depolarizer composed of two liquid crystal was proposed in the paper.Experimental results show that the liquid crystal depolarizer is insensitive to the polarization state of the incident light and can totally depolarize CW or pulsed monochromatic light with arbitrary polarization states.The depolarizer has the potential to keep the polarization state of the fiber injection laser system of the ICF driver.

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Reference (12)

[1]	WANG Ch Ch,YUAN X D,QING X W et al.Recent advances of XG Ⅱ high power solid-state laser facility[J].Laser Technology,2004,28(5):469～472(in Chinese).
[2]	LOEBER A D.Depolarization of white light by birefringence crystalⅡ:the Lyot depolarizer[J].J O S A,1982,72(5):650～656.
[3]	XU F Y.A new type of depolarizer of magnesium fluoride[J] Sociality of Optical Engineering,1992,1752(3):315～316.
[4]	WETZEL R.A depolarizer for poly and monochromatic light of any desired wavelength[J].Optic,1987,76(4):189～191.
[5]	CHEN H X,SUI Zh,CHEN Zh P et al.Optical modulation characteristics of liquid crystal television(LCTV) and it's application in optics information processing[J].Journal of Chinese Lasers,2000,A27(8):741～745(in Chinese).
[6]	LU K,SALEH B E A.Theory and design of the liquid crystal TV as an optical spatial phase modulator[J].Opt Engng,1990,29(10):240～246.
[7]	ZHAO D Zh,ZHANG H Y.Spatial light modulator[M].Beijing:Beijing Institute of Technology Press,1992.55～60(in Chinese).
[8]	COY J A,ZALDARRIAGA M,GROSZ D F et al.Characterization of a liquid crystal television as a programmable spatial light modulator[J].Opt Engng,1996,35(6):15～19.
[9]	KIRSCH J C,GREGORY D A,THIE M W et al.Modulation characteristics of the Epson liquid crystal television[J].Opt Engng,1992,31(5):963～970.
[10]	LAUDE V,MAZE S,CHAVEL P et al.Amplitude and phase coding measurement of a liquid crystal television[J].Opt Commun,1993,103:33～38.
[11]	NETO L G,ROBERGE D,SHENG Y.Full-range,continuous,complex modulation by the use of two coupled-mode liquid-crystal televisions[J].Appl Opt,1996,35(8):4567～4576.
[12]	LIU H K,CHAO T H.Liquid crystal television spatial light modulators[J].Appl Opt,1989,28(7):4772～4780.

Research of a new kind of liquid crystal depolarizer

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