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⇤ ← Revision 13 as of 2012-03-04 17:29:10 →
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Editor: TomotadaAkutsu
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← Revision 17 as of 2012-06-18 20:19:16 → ⇥
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Editor: TomotadaAkutsu
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Deletions are marked like this. Additions are marked like this.
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== Applicable Documents ==
TBD		 == Current Status ==
 * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=872|JGW-T1200872]]
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The mode matching is one of the important step to construct an optical cavity. For KAGAR, the beam size will become about 10cm diameter,
while there seems no commercial products that is able to measure such a large beam size.
Thus we should develop such tool.		 The mode matching is one of the important step to operate an optical cavity.
For KAGRA, the beam size will become about 100 mm diameter.
There seems no commercial products that is able to measure such a large beam size so far,
and we will develop such a tool.
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 * Measuring a spatial distribution of intensities of a laser beam.
 * Fitting the intensity distribution with theoretical Gaussian profile.
 * Average, Data extraction, etc, anything that are usually equipped to a usual beam profiler...
  * Measuring a spatial distribution of intensities of a laser beam for 300 mm diameter.
 * Visualizing the measured data on site and remote in real time (live view).
 * Offering any other functions that are usually equipped in commercial beam profilers. (Fit-function of the measured data with Gaussian profile, Functions of statistical processing, Functions of exporting the measured data)
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== Requirements ==
TBD

== Characteristics ==
TBD.
The larger ones and middle one should be newly developed.
There are some commercial products for smaller ones.

== Inspection plans ==
TBD

== Procurement process and plans ==
TBD


== Links ==
 * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=872|JGW-T1200872]]

Beam Profilers for large beams

Related subgroups: IOO, MIF, VAC

..Up

Contents

  1. Beam Profilers for large beams
    1. Scope
    2. Current Status
    3. General Description
      1. Functions
      2. Locations

Scope

The scope of Beam Profilers for large beams is to check the beam mode during the phase of initial alignment of optics.

Current Status

General Description

The mode matching is one of the important step to operate an optical cavity. For KAGRA, the beam size will become about 100 mm diameter. There seems no commercial products that is able to measure such a large beam size so far, and we will develop such a tool.

Functions

  • Measuring a spatial distribution of intensities of a laser beam for 300 mm diameter.
  • Visualizing the measured data on site and remote in real time (live view).
  • Offering any other functions that are usually equipped in commercial beam profilers. (Fit-function of the measured data with Gaussian profile, Functions of statistical processing, Functions of exporting the measured data)

Locations

Anywhere in the initial alignment phase.

LCGT/subgroup/AOS/BeamModeProfiler1 (last edited 2012-09-16 20:37:26 by KiwamuIzumi)