Laserbeam Dumpdesign

First, clean the absorber surface with a tissue, using Umicore #2 Substrate Cleaner, acetone or methanol. Then dry the surface with another tissue. Please note that a few absorbers (Pyro-BB, 10K-W, 15K-W, 16K-W and 30K-W) cannot be cleaned with this method. Instead, simply blow off the dust with clean air or nitrogen. Don't touch these absorbers. Also, HE sensors (such as the 30(150)A-HE-17) should not be cleaned with acetone.Note: These suggestions are made without guarantee. The cleaning process may result in scratching or staining of the surface in some cases and may also change the calibration.

The BD10K-W is a water cooled beam dump for up to 11 kW with a 45 mm aperture. It has a deflecting cone and annular absorber that withstands high power densities to 10 kW/cm². It can be used over the spectral range from 0.8 to 20 µm.

Needless to say, it’s also important to be sure to have a steady setup. A sensor held by hand could easily be moved around involuntarily, which could cause partial or complete missing of the sensor’s aperture at increasing distance, particularly for an invisible beam.

Laserbeamblock

Objects absorb light when the atoms or molecules within them have electrons that can be excited by the energy of the light. This excitation causes the electrons to move to a higher energy state, and as they return to their original state, they emit heat or light.

Beam Dumps are used to safely absorb the unused part of a laser beam, protecting nearby personnel and equipment. In this video you will learn about Ophir's range of Beam Dump solutions for various power levels.

In theory, if a beam is completely parallel and fits within the aperture of a sensor, then it should make no difference at all what the distance is. It will be the same number of photons (ignoring absorption by the air, which is negligible except in the UV below 250nm). If, nevertheless, you do see such a distance dependence, there could be one of the following effects happening:

Yes, the material an object is made of can greatly affect its absorption of light. Different materials have different electronic structures and therefore different abilities to absorb light. For example, a metal object will reflect most of the light that hits it, while a colored plastic object will absorb certain wavelengths of light and reflect others.

Water-cooledbeam dump

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The damage threshold of thermal sensors does depend on the power level and not only the power density because the sensor disc itself gets hotter at high powers. For instance, the damage threshold of the Ophir broadband coating may be 50KW/cm2 at 10 Watts but only 10KW/cm2 at 300W. The Ophir specifications for damage threshold are always given for the highest power of use of a particular sensor, something which is not done by most other manufacturers. This should be taken into account when comparing specifications. The Sensor Finder takes the power level into consideration when calculating damage threshold.

What is the damage threshold of the thermal broadband coating and how does it compare with claims of other manufacturers?

Laserbeam dumpmaterial

In theory, if a beam is completely parallel and fits within the aperture of a sensor, then it should make no difference at all what the distance is. It will be the same number of photons (ignoring absorption by the air, which is negligible except in the UV below 250nm). If, nevertheless, you do see such a distance dependence, there could be one of the following effects happening:

Needless to say, it’s also important to be sure to have a steady setup. A sensor held by hand could easily be moved around involuntarily, which could cause partial or complete missing of the sensor’s aperture at increasing distance, particularly for an invisible beam.

The damage threshold of thermal sensors does depend on the power level and not only the power density because the sensor disc itself gets hotter at high powers. For instance, the damage threshold of the Ophir broadband coating may be 50KW/cm2 at 10 Watts but only 10KW/cm2 at 300W. The Ophir specifications for damage threshold are always given for the highest power of use of a particular sensor, something which is not done by most other manufacturers. This should be taken into account when comparing specifications. The Sensor Finder takes the power level into consideration when calculating damage threshold.

Beam dumpsizes

High energy laserbeam dump

Objects appear to have different colors because they absorb certain wavelengths of light and reflect others. The wavelengths of light that are reflected determine the color that we see.

Some objects appear to glow or fluoresce under certain types of light because they contain fluorescent materials. These materials absorb light at one wavelength and then emit it at a longer wavelength, making them appear to glow. This is commonly seen in highlighter pens and glow-in-the-dark objects.

We publish a nominal damage threshold for most of our thermal BB sensors as 20 KW/cm2. Other manufacturers may quote higher numbers than this. In actuality, in one to one tests against competitors, our sensors show a higher damage threshold but the actual damage threshold depends on the total power as well as the power density. For very low powers such as 30 W, the damage threshold can be as high as 50 KW/cm2 and at high powers such as 5 KW, it drops to 3 KW/cm2. The Ophir sensor finder program takes account of these variations in its calculations.

Beam Dumps are used to safely absorb the unused part of a laser beam, protecting nearby personnel and equipment. In this video you will learn about Ophir's range of Beam Dump solutions for various power levels.

Unless otherwise indicated, Ophir sensors and meters should be recalibrated within 18 months after initial purchase, and then once a year after that.

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Beam dumpprice

The BD10K-W is a water cooled beam dump for up to 11 kW with a 45 mm aperture. It has a deflecting cone and annular absorber that withstands high power densities to 10 kW/cm². It can be used over the spectral range from 0.8 to 20 µm.

NewportBeam Dump

The color of an object is determined by the wavelengths of light that it reflects. Objects that appear black absorb most of the visible light that hits them, while objects that appear white reflect most of the visible light. The color of an object can affect the specific wavelengths of light that it absorbs.

Unless otherwise indicated, Ophir sensors and meters should be recalibrated within 18 months after initial purchase, and then once a year after that.

What is the damage threshold of the thermal broadband coating and how does it compare with claims of other manufacturers?

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We publish a nominal damage threshold for most of our thermal BB sensors as 20 KW/cm2. Other manufacturers may quote higher numbers than this. In actuality, in one to one tests against competitors, our sensors show a higher damage threshold but the actual damage threshold depends on the total power as well as the power density. For very low powers such as 30 W, the damage threshold can be as high as 50 KW/cm2 and at high powers such as 5 KW, it drops to 3 KW/cm2. The Ophir sensor finder program takes account of these variations in its calculations.

First, clean the absorber surface with a tissue, using Umicore #2 Substrate Cleaner, acetone or methanol. Then dry the surface with another tissue. Please note that a few absorbers (Pyro-BB, 10K-W, 15K-W, 16K-W and 30K-W) cannot be cleaned with this method. Instead, simply blow off the dust with clean air or nitrogen. Don't touch these absorbers. Also, HE sensors (such as the 30(150)A-HE-17) should not be cleaned with acetone.Note: These suggestions are made without guarantee. The cleaning process may result in scratching or staining of the surface in some cases and may also change the calibration.