Study on Generation oand Control of ultrashort Optical Pulses by Electrooptic Modulation.

电光调制超短光脉冲产生与控制的研究。

基本信息

批准号：
09450031
负责人：
KOBAYASHI Tetsuro
金额：
$ 5.5万
依托单位：
Osaka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

项目摘要

This study has been pursued to develop electro-optical ultrashort optical pulse generation method with high controllability. A main results obtained are as follows ;1) Design and improvement of an electrooptic phase modulator/deflector with high-modulation index using periodic domain inversion scheme.We succeeded in development of compact size waveguide-type quasi-velocity-matching electrooptic modulator with periodic domain inversion. Highly-efficient phase modulation as compared with a bulk-type one has been experimentally confirmed.2) Proposal of a novel QVM optical phase-modulator featuring lens modulation and its application to the electrooptic chirping compression method for pedestal free femtosecond optical pulse generation.Ordinary sinusoidal phase modulation generates both types of the frequency chirping ; up-chirping and down chirping. There was, therefore, a problem that although short optical pulses are obtained from one of chirping part by chirping compression method with the group delay dispersion, other chirping part still remains as background light. Our new modulator has lens modulation function as well as phase modulation function. Since modulated light beam is focused into the different point for the case of up-chirping and down-chirping, respectively, we can easily eliminate the undesirable chirping part by a pinhole. Using this modulator we succeeded in generation of pedestal free 520fs pulses from a cw Ar laser.3) Proposal and design of novel Fabry-Perot electrooptic modulator accompanied with lens modulation for femtosecond pulse generation. (Jpn Patent pending, H10-258293, CLEG '99 to be presented).

该研究已被追求开发具有高可控性的电流超平脉冲产生方法。获得的主要结果如下：1）使用周期性域反转方案设计和改进具有高温指数的电气相调制器/偏转器。我们成功地开发了紧凑型尺寸sparguide type quas-quasi-evelocity Quasi-velocity Quasi-velocity Matching Eletroptic调制器，域反转。与散装型相比，已经通过实验确认了高效的相位调制。2）提案新型QVM光学相位调节器具有镜头调制及其在电式chir the式压缩方法中的应用，用于基座自由脉冲脉冲产生。正弦相调制会产生两种类型的频率chir频。向上握住和chi。因此，存在一个问题，即尽管通过the骨延迟分散量通过chir tange taging taging taging部分获得了简短的光学脉冲，但其他chir的部分仍然是背景光。我们的新调制器具有镜头调制功能以及相位调制功能。由于调制的光束分别集中在上座和隔间的情况下，因此我们可以轻松地消除针孔的不良chir折。使用此调节器，我们成功地从CW AR激光器中生成了无基座的520FS脉冲。3）新型Fabry-Perot电型调制器的建议和设计，并伴随着镜头调制，用于飞秒脉冲的产生。（JPN申请申请，H10-258293，CLEG '99的介绍）。