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YAG集光点測定用アナライザ
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セットアップ プログラム (YAG-FSA / Beam Cube)Description
Specifications
Ordering Info
Catalog/Manual
 Download Data Sheet. | |
| Measure the focal spot of a relatively high power laser, in particular a YAG laser. The average power can be from <1 to 400 Watts and the focal spot can be as small as 25µm. The FSA can also be used to measure how the focal spot shifts with power. | |
| The lasers focal length from the lens to the focal spot is usually on the order of 70 to 120mm. The YAG FSA assembly adds a negative lens to the LBS-300 beam splitter assembly to increase the focal path and at the same time enlarge the image. Several focal length lenses are available to accommodate different host system focal paths. The FSA includes; user selectable negative lens, 2 beam splitters, a removable beam block on the 2nd splitter, and user selectable attenuation filters prior to the beam entering the camera. An excel spreadsheet is downloadable from our website that calculates which lenses are available to use for your application, how far to mount the FSA from your focusing lens in order to see the focal spot and what the magnification of the image will be. | |
| Operation: | |
| The FSA is mounted to the camera as shown. Then the assembly is placed below the final focusing lens of the laser at the recommended distance. The focal spot is found by moving the assembly closer and farther from the beam until the smallest spot size is seen. The exact magnification factor (usually 2-3 times) is calculated by moving the stage holding the FSA assembly a given lateral distance and seeing how far the centroid of the focal spot moves in the beam profiling software. This scaling factor is then entered into the software. In order to find focal spot shift with laser power, simply find focal spot at one power, change the power and measure how far the stage has to be moved up or down to get to the smallest beam size again. | |
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| Focal Spot Assembly Looking from camera mounting position | |
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| Focal Spot Assembly showing various beam paths | |
| Examples of Usage | |
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| 65µm diameter focal spot | Focal spot shape changing with laser power level |
| Model | YAG Focal Spot Analyzer |
| Wavelength | 1064nm |
| Wedge Material | BK7 |
| Wedge Coating | AR ≤1% |
| Clear aperture | 17.5mm |
| Wedge ND value, each | ND ≥2 |
| ND Filters | Bulk ND |
| ND Values, nominal | 0.3, .7, 1.0, 2.0, 3.0, 4.0 (Red holders) |
| Filter Slides | 3 |
| Filter Damage (1) | 50 W/cm² 1J/cm², 10ns pulse |
| Negative Lens | FSA-50Y |
| To add FSA capability | -50mm YAG |
| FSA-100Y | |
| -100mm YAG | |
| FSA-125Y | |
| -125mm YAG | |
| FSA-150Y | |
| -150mm YAG | |
| FSA-200Y | |
| -200mm YAG | |
| Accessories | |
| Variable Wedge ND Filter kit | WVF-300 |
| Beam Dumps | BD-040-A, 40 Watts Max Power, Air Cooled |
| BD-500-W, 500 Watts Max Power, Water Cooled | |
| Note: (1) ND bulk absorbing filters damage threshold is 50W/cm² but should be used at <5W/cm² to avoid thermal lensing effects. | |
 | Beam Profilers Catalog 82 pages (5.44 MB ) | |
 | YAG Focal Spot Analysis Adapter 11 pages (312 KB ) |