Demonstration of the stabilization technique for nonplanar optical resonant cavities utilizing polarization

T Akagi; S Araki; Y Funahashi; Y Honda; S Miyoshi; T Okugi; T Omori; H Shimizu; K Sakaue; T Takahashi; R Tanaka; N Terunuma; Y Uesugi; J Urakawa; M Washio; H Yoshitama

doi:10.1063/1.4918653

Demonstration of the stabilization technique for nonplanar optical resonant cavities utilizing polarization

Rev Sci Instrum. 2015 Apr;86(4):043303. doi: 10.1063/1.4918653.

Authors

T Akagi¹, S Araki¹, Y Funahashi¹, Y Honda¹, S Miyoshi², T Okugi¹, T Omori¹, H Shimizu¹, K Sakaue³, T Takahashi², R Tanaka², N Terunuma¹, Y Uesugi², J Urakawa¹, M Washio³, H Yoshitama²

Affiliations

¹ High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan.
² AdSM Hiroshima University, 1-3-1 Kagamiyama, Higashi, Hiroshima 739-8530, Japan.
³ Research Institute for Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku 169-8555, Japan.

PMID: 25933851
DOI: 10.1063/1.4918653

Abstract

Based on our previously developed scheme to stabilize nonplanar optical resonant cavities utilizing polarization caused by a geometric phase in electromagnetic waves traveling along a twisted path, we report an application of the technique for a cavity installed in the Accelerator Test Facility, a 1.3-GeV electron beam accelerator at KEK, in which photons are generated by laser-Compton scattering. We successfully achieved a power enhancement of 1200 with 1.4% fluctuation, which means that the optical path length of the cavity has been controlled with a precision of 14 pm under an accelerator environment. In addition, polarization switching utilizing a geometric phase of the nonplanar cavity was demonstrated.