Electronic Resource
[S.l.]
:
American Institute of Physics (AIP)
Review of Scientific Instruments
60 (1989), S. 598-601
ISSN:
1089-7623
Source:
AIP Digital Archive
Topics:
Physics
,
Electrical Engineering, Measurement and Control Technology
Notes:
We describe a simple system displaying the intensity profile of specific frequency components of a pulsating light beam. This device employs a spiral pattern of small apertures on a rotating wheel (Nipkow disk), which provides a two-dimensional scanning of the beam. A phototube ac-coupled with standard one-channel electronics is used to analyze the light sampled by the wheel. These elements allow for homodyne, heterodyne, and phase-detection techniques yielding pictures of the whole mode-beating profile on an oscilloscope monitor. A demonstration application to the study of the transverse modes of a single-line argon laser is given.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1140369
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