Category : Laser components, systems, equipment and applications > Laser measurement

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Most systems for laser power measurement up to about 100W CW have almost total absorption of the beam on a relatively massive target. This approach can give some or all of the following problems. (1) The response is usually inconveniently slow. (2) The sensitivity may vary across the target. (3) The sensitivity may drop at high powers due to non-linear cooling. (4) At the highest powers there may be damage to the target.

By using an Integrating Sphere , our laser power meters avoid these problems. The sphere is coated with a robust high reflectivity diffuser which spreads the absorption evenly over the whole sphere while the power on the detector is reduced to a level well within the linear range. The geometry of the integrating sphere is chosen to give a signal which is essentially independent of beam position, beam size and beam angle. This allows the measurement of the diverging output from an optical fibre (up to a 60 degree cone or +/- 30 degrees on either side of the axis).

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List of all articles in this sub-category Laser measurement

List of all articles in this sub-categoryList of all articles in this sub-categoryList of all articles in this sub-category