Development of a gravity meter using an optical spring effet inside Fabry-Perot cavity
Project/Area Number |
25610131
|
Research Category |
Grant-in-Aid for Challenging Exploratory Research
|
Allocation Type | Multi-year Fund |
Research Field |
Solid earth and planetary physics
|
Research Institution | The University of Tokyo |
Principal Investigator |
Miyoki Shinji 東京大学, 宇宙線研究所, 准教授 (20302680)
|
Project Period (FY) |
2013-04-01 – 2017-03-31
|
Project Status |
Completed (Fiscal Year 2016)
|
Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2014: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
|
Keywords | Fabry-Perot共振器 / Optical Spring / 精密長さ計測 / 半共振 / 光輻射圧 / Fabry-Perot共振器 / Optical spring / 反共振 / ファブリペロー共振器 / 重力 / 重力計 / 光圧浮上 / 光りばね効果 |
Outline of Final Research Achievements |
We developed a novel technique for a gravity meter using optical radiation pressure to obtain better sensitivity than that of a superconductive gravity meter. In this scheme, an optical Fabry-Perot(FP) cavity is set vertically and is set semi-resonant state to obtain an optical spring effect. Additionally, one of mirrors for the FP cavity is planed to be levitated by radiation pressure of a laser beam inside the Fabry-Perot cavity by setting the weight of the mirror light. Although we encountered an unstable phenomena due to the optical spring state, we succeeded to keep the semi-resonant state by a moderate feedback control system and verified the effect of the radiation pressure inside the FP cavity.
|
Report
(5 results)
Research Products
(10 results)
-
[Presentation] KAGRAの現状2017
Author(s)
鈴木敏一, KAGRAコラボレーション
Organizer
日本物理学会
Place of Presentation
大阪大学、大阪府・豊中市
Year and Date
2017-03-17
Related Report
-
[Presentation] KAGRA Present Status2016
Author(s)
S.Miyoki and KAGRA Collaboration
Organizer
NCTS Annual Theory Meeting
Place of Presentation
新竹市、台湾国
Year and Date
2016-12-06
Related Report
Int'l Joint Research / Invited
-
-
-
-
-
-
-
-