含电阻和e偏振背景光光折变屏蔽光伏孤子  

Screening-photovoltaic spatial solitons illuminated by e-polarized incoherent uniform background irradiation with a divider resistance

作　　者：吉选芒[1] 姜其畅[1] 刘劲松[2] 

机构地区：[1]山西运城学院物理与电子工程系,运城044000 [2]华中科技大学光电子科学与工程学院,武汉430074

出　　处：《激光技术》2012年第1期54-58,共5页Laser Technology

基　　金：山西省自然科学基金资助项目(2011011003-2)

摘　　要：为了得到分压电阻和e偏振非相干均匀背景光对屏蔽光伏孤子影响的结果,建立了有分压电阻和e偏振非相干均匀背景光辐照下光伏光折变晶体中的空间孤子的理论。数值分析了分压电阻和e偏振非相干均匀背景光对孤子半峰全宽的影响。结果表明,亮、暗和灰孤子的半峰全宽随分压系数增大(分压电阻减小)而减小;当e偏振背景光与暗辐射强度的比值不太大时,背景光对孤子的影响可忽略不计;当背景光与暗辐射强度比值过大时,孤子的半峰全宽随背景光的增加而增大;当分压电阻、e偏振背景光、晶体外加电场和晶体的光伏场取不同值时,不同的条件下的单光子光折变空间孤子都可得到。In order to obtain a divider resistance and e-polarized incoherent uniform background irradiation effect on the screening-photovohaic spatial solitons, a universal spatial soliton theory in photovohaic photorefractive crystals illuminated by e- polarized incoherent uniform background irradiation with a divider resistance was put forward. The effect of a divider resistance and e-polarized incoherent uniform background irradiation on the full width of half maximum （FWHM） of solitons were simulated. The numerical results show that the FWHM of the solitons decreases with increasing of divider coefficient. The background irradiation has a paltry influence on the solitons when the ratio of the intensity of the e-polarized background irradiation to dark irradiance is small. The FWHM of solitons increases with increasing of the intensity of background irradiation when the ratio is bigger. All kinds Of the spatial soliton can be obtained from this theory by adjusting the value of the divider resistance, e- polarized background irradiation, the biased electric field and photovohaic electric field.

关 键 词：非线性光学 光折变效应 空间孤子 分压电阻 e偏振背景光 

分 类 号：O437[机械工程—光学工程]