Multichannel interferometry using high‐order rotating diffraction gratings
J. Howard, G. B. Warr, and P. S. Dodds
Review of Scientific Instruments, 1992
Times cited: 12
Abstract:
We report the successful construction and operation of a far‐infrared (337 $\mu$m) interferometer based on a multiple‐order diffraction grating wheel. On reflection from the wheel circumference, the incident laser beam is diffracted into a number ($\sim$12) of approximately equal intensity high‐order beams. Since the Doppler offset of the beams is proportional to the diffraction order, information encoded by the spatially distinct beams is multiplexed in the frequency domain. This allows simultaneous multichannel phase shift information to be obtained using only a single detector.
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BibTeX:
@Article{howard1992a,
author = {Howard, John and Warr, George B. and Dodds, Peter S.},
title = {Multichannel interferometry using high-order
rotating diffraction gratings},
journal = {Review of Scientific Instruments},
year = 1992,
key = {general},
pages = {4965-4967},
volume = {63},
number = {10},
title = {Multichannel interferometry using high-order
rotating diffraction gratings},
journal = {Review of Scientific Instruments},
year = 1992,
key = {general},
pages = {4965-4967},
volume = {63},
number = {10},
}