Development of a Fast Position-Sensitive Laser Beam Detector
Isaac Chavez, Rongxin Huang, Kevin Henderson, Ernst-Ludwig Florin, and, Mark G. Raizen
TL;DR
This paper presents a high-speed, position-sensitive laser beam detector using fiber optics and balanced photodetectors, enabling precise, fast measurements of microscopic particle motion for biological and physical research.
Contribution
The paper introduces a novel fiber-optic based detector with bandwidth surpassing existing devices, suitable for high-resolution, rapid measurements in microscopic studies.
Findings
Achieved sub-Angstrom spatial resolution.
Demonstrated capability to study fast Brownian motion.
Potential applications in molecular and cellular biology.
Abstract
We report the development of a fast position-sensitive laser beam detector with a bandwidth that exceeds currently available detectors. The detector uses a fiber-optic bundle that spatially splits the incident beam, followed by a fast balanced photo-detector. The detector is applied to the study of Brownian motion of particles on fast time scales with 1 Angstrom spatial resolution. Future applications include the study of molecule motors, protein folding, as well as cellular processes.
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