Achromatic deep nulling with a three-dimensional Sagnac interferometer.
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.
Yokochi
Kaito
K
Graduate School of Engineering, Tokyo University of Agriculture and Technology, Tokyo, Japan. 50008834204@st.tuat.ac.jp
Tavrov
Alexander V
AV
Nishikawa
Jun
J
Murakami
Naoshi
N
Abe
Lyu
L
Tamura
Motohide
M
Takeda
Mitsuo
M
Kurokawa
Takashi
T