Overview of 3A-P laser measurement sensor:

3A-P is a very sensitive thermal power/energy laser measurement sensor, which is suitable for short pulse laser. It has a 12 mm aperture. It can measure 15 μ W to 3W and 20 μ J to 2J. It has a P-type volumetric absorber covering a spectral range from 0.15 to 8 μ m. The sensor has a 1.5m long cable for connecting to the instrument or PC interface.

3A-P Sensor Drawing：

Main parameters:

Problem summary:

Can the 3A-P sensor operate at 10.6 μm?

The 3A-P sensor actually absorbs about 85% at 10.6 μm, so it can be used to measure weak CO2 lasers.

Can the BeamTrack sensor be used to measure the position and size of the pulsed laser?

Because position and size are measured together with power, if the laser pulses at a rate at which the average power can be measured, then position and size can also be measured.

Must a specific sensor be used only with the instrument used when ordering?

Ophir instruments and sensors are calibrated independently. Each instrument has the same sensitivity as the other instrument, and the error is about 2%. Each sensor is calibrated independently of a specific instrument, and its calibration information is contained in the DB15 plug. When the sensor is connected to the instrument, the instrument will read and interpret this information. Since the accuracy of the sensor is usually+/- 3%, the additional 0.2% error that may result from inserting different instruments can be ignored, so it does not matter which calibration instrument is used for a specific calibrated sensor.

Does the injury threshold depend on the power level?

The damage threshold of the thermal sensor really depends on the power level, not just the power density, because the sensor disk itself will become hotter at high power. For example, the damage threshold of Ophir broadband coating may be 50KW/cm²at 10W, but only 10KW/cm²at 300W. Ophir's damage threshold specification is always given for the maximum power used by a particular sensor.