title: Achromatic deep nulling with a three-dimensional Sagnac interferometer.
abstract: A 3-D Sagnac interferometer can null out light from an on-axis source achromatically. The 3-D Sagnac interferometer can make stable and achromatic pi phase shifts, because it has a common path structure. The achromaticity of the interferometer is theoretically proved by Jones calculus. The experimental setup is constructed, and its nulling characteristics are measured to be about 10(-6) at 5 lambda/d for green (lambda=532 nm) and red (lambda=633 nm) laser light simultaneously. This interferometer would be very useful for the direct detection of faint extrasolar planets.
authors: Graduate School of Engineering, Tokyo University of Agriculture and Technology, Tokyo, Japan. 50008834204@st.tuat.ac.jp
authors: Kaito
authors: K
authors: Yokochi
authors: Alexander V
authors: AV
authors: Tavrov
authors: Jun
authors: J
authors: Nishikawa
authors: Naoshi
authors: N
authors: Murakami
authors: Lyu
authors: L
authors: Abe
authors: Motohide
authors: M
authors: Tamura
authors: Mitsuo
authors: M
authors: Takeda
authors: Takashi
authors: T
authors: Kurokawa