Demonstration of the stabilization technique for nonplanar optical resonant cavities utilizing polarization.
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.
High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan.
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Akagi
High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan.
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Araki
High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan.
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Funahashi
High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan.
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Honda
AdSM Hiroshima University, 1-3-1 Kagamiyama, Higashi, Hiroshima 739-8530, Japan.
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Miyoshi
High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan.
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Okugi
High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan.
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Omori
High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan.
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Shimizu
Research Institute for Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku 169-8555, Japan.
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Sakaue
AdSM Hiroshima University, 1-3-1 Kagamiyama, Higashi, Hiroshima 739-8530, Japan.
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Takahashi
AdSM Hiroshima University, 1-3-1 Kagamiyama, Higashi, Hiroshima 739-8530, Japan.
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Tanaka
High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan.
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Terunuma
AdSM Hiroshima University, 1-3-1 Kagamiyama, Higashi, Hiroshima 739-8530, Japan.
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Y
Uesugi
High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan.
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Urakawa
Research Institute for Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku 169-8555, Japan.
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Washio
AdSM Hiroshima University, 1-3-1 Kagamiyama, Higashi, Hiroshima 739-8530, Japan.
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Yoshitama