Development of the ultra-stable optical cavity using a ceramic spacer

2016 Fiscal Year Final Research Report

• Project/Area Number: 26400423
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Atomic/Molecular/Quantum electronics
• Research Institution: National Institute of Advanced Industrial Science and Technology
• Principal Investigator: Kazumoto Hosaka 国立研究開発法人産業技術総合研究所, 物理計測標準研究部門, 研究グループ長 (50462859)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 光周波数標準 / 狭線幅レーザー / 低熱膨張セラミック / 光共振器 / 熱雑音

Outline of Final Research Achievements

To reduce the thermal noise on the optical cavity and achieve excellent frequency stabilities of lasers, we designed a very long cavity using an ultra-low expansion ceramic spacer. However, it was difficult for the product company to make the thick ceramic parts with the good thermal properties due to the technical problems. Therefore, we have employed another optical cavity that has crystalline coatings on the mirrors, because the crystalline coating mirror has high mechanical Q factor. Using the cavity, we expect that the thermal noise limit of the frequency stability will be about one tenth of that for the previous optical cavity.

Free Research Field

量子エレクトロニクス、原子分子物理学