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Development of an Efficient Ultrashort Optical Pulse Generator Using Modified Fabry-Perot Modulator

使用改进的法布里-珀罗调制器开发高效的超短光脉冲发生器

基本信息

批准号：
05555015
负责人：
KOBAYASHI Tetsuro
金额：
$ 4.35万
依托单位：
Osaka 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：
1993
资助国家：
日本
起止时间：
1993 至 1994
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-05555015/
关键词：
Ultashort Pulses Electrooptic Modulatoion FP Modulator Multiple Interference Optical Phase Modulator Femto Second Tera Hertz Sideband 電気光学変調ファブリ・ペロー干渉計ピコ秒・サブピコ秒 LiTaO_3 位相変調器

项目摘要

We proposed a modified FP modulator and confirmed the operation. The modified FP modulator is simply formed by adding a mirror to an ordinary FP modulator at the input end. Two mirrors at the input end of the modulator forms a FP filter which is tuned to pass a input light frequency and to reflect sideband frequencies generated by the internal phase modulation.First, we developed an efficient electrooptic phase modulator at a high frequency with quasi-velocity-matching by domain inversion of an electrooptic crystal. We made an electrooptic phase modulator of an LiTaO_3 crystal at 16.25 GHz. An experiment of deep microwave modulation was carried out with the modulator. As the result, a wide FM light of almost 3 THz width was generated. The modulation efficiency was 1.6 rad/ROO<W> which is ten times greater than the efficiency of ordinary bulk modulators.Next, a modified FP modulator with a bulk electrooptic phase modulator was constructed and tested. As the result of the operation, ultr … More ashort pulses of less than 1 ps was generated. The output power of the modulator was 15 times larger than the output power of the ordinary FP modulator which is removed one input mirror from the modified FP modulator. The most important operation of the modulator was confirmed by this experiment.The pulse shape and the output power and their dependence on optical biases on the experiment was well agree with theoretical ones. To stabilize the optical biases of the cavity, we made feedback systems after a digital control method and a Pound-Drever method. The experimental result shows that the stabilizing system is necessary for practical operation and that the optical biases can be well stabilized by an ordinary electronic system.The modified FP modulator is not only a pulse generator but also a wide sideband generator. The ultimate limit of the pulse width or the sideband width is depend on the dispersion in the modulator It extends for a few tenth femtosecond and for a few tenth terahertz. This research clearly show the usefulness of the modulator in various fields. Less

我们提出了一种改进的FP调制器，并证实了操作。改进型FP调制器是在普通FP调制器的输入端加一个反射镜构成的。在调制器的输入端的两个反射镜形成FP滤波器，其被调谐以通过输入光频率并反射由内部相位调制产生的边带频率。首先，我们通过电光晶体的畴反转开发了具有准速度匹配的高频高效电光相位调制器。我们制作了16.25GHz的LiTaO_3晶体电光相位调制器。利用该调制器进行了微波深度调制实验。结果，产生了几乎3 THz宽度的宽FM光。调制效率为1.6rad/ROO<W>，是普通体调制器的10倍以上。其次，设计并测试了一种改进型FP调制器。作为行动的结果， ...更多信息产生小于1 ps的短脉冲。该调制器的输出功率比普通FP调制器的输出功率大15倍，其中普通FP调制器从改进的FP调制器中移除一个输入镜。实验结果证实了调制器的主要工作原理，实验测得的脉冲波形、输出功率及其对光偏置的依赖关系与理论结果吻合较好。为了稳定腔的光偏，我们在数字控制方法和Pound-Drever方法之后制作了反馈系统。实验结果表明，该稳定系统是实际工作所必需的，普通的电子学系统可以很好地稳定光偏，改进的FP调制器不仅是一个脉冲发生器，而且是一个宽边带发生器。脉冲宽度或边带宽度的极限取决于调制器中的色散，其扩展为几十个飞秒和几十个太赫兹。这项研究清楚地表明了调制器在各个领域的实用性。少