Development of Doppler Global Velocimetry using a DPSS laser

使用 DPSS 激光器开发多普勒全局测速仪

• 批准号: 23560198
• 负责人: SAKAGUCHI Daisaku
• 金额: $ 3.33万
• 依托单位: Nagasaki University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2013
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23560198/
• 关键词: レーザー; ドップラー効果; 流体計測; レーザ計測; 三次元流れ

DGV (Doppler Global Velocimetry) with a DPSS (Diode-Pump Solid State) laser is successfully developed in this research. DGV is a system to measure velocity of particles crossing a laser sheet, by analizing the scattered doppler shifted frequency of a light sheet. The light frequency shift is very weak because of the very low speed of the particles compared to the speed of light. In order to overcome this problem, an absorption line of the molecular iodine was used. The frequency shift as a function of the absorption line of the iodine cell can be traced back to particle velocity. The optical setup with the DPSS laser and the iodine cell was developed in this research and measurement accuracy of the velocity field from the rotating disc was confirmed. It is found that the DPSS laser is suitable laser source for DGV system because of its high stability and narrow line width, as a result, high measurement accuracy is obtained by this system.

本研究成功地研制了一种基于二极管泵浦固体激光器的多普勒全局测速仪。DGV是一种通过分析光片的散射多普勒频移来测量穿过激光片的粒子速度的系统。光频移非常微弱，因为粒子的速度与光速相比非常低。为了克服这个问题，使用分子碘的吸收线。作为碘电池的吸收线的函数的频移可以追溯到粒子速度。本研究发展了一套以DPSS雷射与碘池为光源的光学系统，并验证了旋转圆盘速度场量测的准确性。实验结果表明，DPSS激光器具有稳定性高、线宽窄的特点，是适合于DGV系统的激光光源，因此，该系统具有较高的测量精度。

项目成果

半導体励起固体レーザを用いたドップラーグローバル流速計システムの構築

利用半导体泵浦固体激光器构建多普勒全局电流计系统

• 发表时间: 2014
• 作者: T. Watanabe;S. Fujisawa;石原 卓，森下浩二，横川三津夫，宇野篤也，金田行雄;坂口大作,谷尾優樹,壽智史,村上京士郎
• 通讯作者: 坂口大作,谷尾優樹,壽智史,村上京士郎