Photo-induced Domain Inversion for Electrooptic Devices

电光器件的光致畴反转

• 批准号: 12650047
• 负责人: MORIMOTO Akihiro
• 金额: $ 2.3万
• 依托单位: Ritsumeikan University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12650047/
• 关键词: Electrooptic Devices; Spatial Modulation; Domain Inversion; Photo-induced; Deflector; Grating; YAG Laser; 超高速

Domain inversion of an electrooptic crystal makes ultrafast -optical spatial modulation possible. We have developed ultrafast electrooptic modulators, which separate and control optical frequencies with domain inversion, such as an electrooptic deflector, a wave-front controller, an aberration corrector, a phase grating and their integrated devices.In order to develop novel electrooptic devices with domain inversion, it is important to make precise and reproductive domain inversion. First, we studied on ordinary domain inversion by applying DC high voltage. As the result, it is found that the inversion current must be stopped before no later than decreasing to its leaky revel. Domain inversion with pulse high voltage was suitable for the current control by monitoring number of pulses with current shapes.Damage thresholds of electrooptic crystals were tested by applying high-power YAG laser 3rd pulses of 6 ns duration. Up to the damage threshold, there were the circles of refractive index change according to the pulse diameter. After domain inversion with the pulse irradiation, it is found that domain inversion is also possible on the spots of refractive index change.

电光晶体的畴反转使超快光空间调制成为可能。我们开发了电光偏转器、波前控制器、像差校正器、相位光栅及其集成器件等通过域反转分离和控制光频率的超快电光调制器。反演过程中，进行精确的生殖域反演非常重要。首先，我们研究了施加直流高压的普通磁畴反转。结果发现，必须在不迟于降低到其漏电流水平之前停止反转电流。脉冲高压域反转适用于通过监测电流形状的脉冲数量来控制电流。通过施加持续时间为6 ns的高功率YAG激光器第三脉冲来测试电光晶体的损伤阈值。直到损伤阈值，折射率随脉冲直径发生变化。通过脉冲照射进行磁畴反转后，发现在折射率变化的点上也可以发生磁畴反转。

项目成果

H.Murata, K.Kinoshita, G.Miyaji, A.Morimoto, T.Kobayashi: "Quasi-Velocity-Matched LiTaO_3 Guided-Wave Optical Phase Modulator for Integrated Ultrashort Optical Pulse Generators"Electron.Letters. 36・17. 1459-1460 (2000)

H.Murata、K.Kinoshita、G.Miyaji、A.Morimoto、T.Kobayashi：“用于集成超短光脉冲发生器的准速度匹配 LiTaO_3 导波光学相位调制器”Electron.Letters 36・17。 1460 (2000)

H Murata, A.Morimoto, T.Kobayashi, S.Yamamoto: "Optical Pulse Generation by Using Quati-Velocity-Matched Guided-Wave Electrooptic Phase Modulator"Optical and Quantum Electronics. 33. 785-794 (2001)

H Murata、A.Morimoto、T.Kobayashi、S.Yamamoto：“使用准速度匹配导波电光相位调制器生成光脉冲”光学和量子电子学。

T. Khayim, A. Maruko, K. Shibuya, A. Morimoto, and T Kobayashi: "Ultrafast Unidirectional Beam Deflection using an Electrooptic Traveling Phase Grating with Periodic Domain Inversion"IEEE J. Quantum Electron. 37, No. 8. 964-969 (2001)

T. Khayim、A. Maruko、K. Shibuya、A. Morimoto 和 T Kobayashi：“使用具有周期域反转的电光行进相位光栅的超快单向光束偏转”IEEE J. Quantum Electron。

森本 朗裕: "濱川, 西野 編:光エレクトロニクス,第7章"オーム社,東京. 108 (2001)

Akihiro Morimoto：“Hamakawa，Nishino 编辑：光电子学，第 7 章”Ohmsha，东京 108 (2001)。

H.Murata, K.Kinoshita, G.Miyaji, T.Kobayashi, A.Morimoto: "Quasi-Velocity-Matched Guided-Wave Optical Modulator with Resonant Electrodes for Integrated Ultrashort Pulse Generators"Conference on Lasers and Electro-Optics (CLEO 2001). CThL. (2001)

H.Murata、K.Kinoshita、G.Miyaji、T.Kobayashi、A.Morimoto：“用于集成超短脉冲发生器的带有谐振电极的准速度匹配导波光学调制器”激光和电光会议 (CLEO 2001