CONSTRUCTION OF PHASE CONJUGATE MICROSCOPE WITH LOW POWER LASER

低功率激光器相位共轭显微镜的构建

• 批准号: 04554009
• 负责人: UESU Yoshiaki
• 金额: $ 3.2万
• 依托单位: WASEDA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research (B)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-04554009/
• 关键词: PHASE CONJUGATION; NOVELTY FILTER; PHOTORETRACTIVE EFFECT; PHASE FRONT RECOVER; BaTiO_3; PHASE CONJUGATE MICROSCOPE; Bi_<12>SiO_<20>; 位相共役顕微鏡; ノーベリティフィルター; フォトリフラクティヴ効果; セルフポンプ法; フオトリフラクティブ効果; チタン酸バリウム; ニオブ酸カリウム

We constructed a new type of microscope which utilizes the wave-front recover nature of the phase conjugation, by using wave-mixing processes inside photorefractive BaTiO3, Fe doped KNbO3 or Bi12SiO20 crystals. By the microscope, only moving objects can be detected and any image processing with a computer is unnecessary. So real time observation of the moving objects can be achieved.In 1992, the photorefractive characteristic of these photorefractive crystals as well as the emission characteristics of the phase conjugation from these crystals were precisely examined by using the moving grating technique which we have developed. Simultaneously we made a new computer program which simulates the behavior of the phase conjugate wave. The results combined with experimentally determined photorefractive characteristics provided with the appropriate conditions for the phase conjugate microscope.In 1993, we constructed the phase conjugate microscope based on the results obtained in 1992. As an phase object, we made a hologram phase plate and determined the visibility of the moving phase plate as a function of the velocity. The mimimum velocity of the moving object was successfully determined. The microscope can be operated with quite low power laser with 1.6mW.

利用光折变晶体BaTiO_3、掺铁KNbO_3和Bi_（12）SiO_（20）的混频过程，利用相位共轭的波前恢复特性，构造了一种新型显微镜。通过显微镜，只能检测到移动的物体，不需要计算机进行任何图像处理。1992年，我们利用所发展的移动光栅技术，精确地测量了这些光折变晶体的光折变特性和相位共轭的发射特性。同时编制了一个新的计算机程序，模拟了相位共轭波的行为。这些结果与实验测定的光折变特性相结合，为相位共轭显微镜提供了合适的条件。1993年，我们在1992年所获得的结果的基础上构造了相位共轭显微镜。作为位相物体，我们制作了全息位相板，并测定了运动位相板的可见度与速度的关系。成功地确定了运动物体的最小速度。该显微镜可在1.6mW的低功率激光下工作。

项目成果

Y.Uesu et al.: "Photorefractive response characteristics and generation of phase-conjugate wave in BSO and BGO crystals" Jpn.J.Appl.Phys.32. 4296-4299 (1993)

Y.Uesu 等人：“BSO 和 BGO 晶体中的光折变响应特性和相位共轭波的产生”Jpn.J.Appl.Phys.32。

T.YOSHIHARA: "Enhancement of Ohtical Wave Mixing Characteristics of Photorefractive BSO by Moving Grating Method" Japan.J.Appl.Phys.31. 3205-3208 (1992)

T.YOSHIHARA：“通过移动光栅方法增强光折变 BSO 的光学波混合特性”Japan.J.Appl.Phys.31。

K.ISODA: "Optical phase-coningate wave and its relaxation process in undoped photorefractive BNN crystal" FERROELECTRICS. 126. 85-90 (1992)

K.ISODA：“未掺杂光折变 BNN 晶体中的光学相位锥波及其弛豫过程”铁电学。

J.M.KIAT: "Direct ohtical oleservation of the 1q/2q transition in incommensurate BNN" FERROELECTRICS. 125. 227-232 (1992)

J.M.KIAT：“在不相称的 BNN 中直接观察 1q/2q 转变”铁电体。

Y.Uesu 他: "Photorefractive response characteristics and generation of phase-conjugate wave in BSO and BGO crystals" Jpn.J.Applied Physics. 32. 4296-4299 (1993)

Y.Uesu 等人：“BSO 和 BGO 晶体中的光折变响应特性和相位共轭波的产生”Jpn.J.Applied Chemistry 32. 4296-4299 (1993)