Overview of 3A-IS integrating sphere photodiode laser measurement sensor:

The 3A-IS is an integrating sphere photodiode laser measurement sensor for divergent beams up to +/-40 degrees. It has a 12mm aperture and can measure from 1μW to 3W. It covers the spectral range from 0.35 to 1.1μm. The sensor comes with a 1.5 meter cable for connecting to a meter or PC interface.

3A-IS sensor drawing:

Main parameters:

Problem summary:

Is there any special problem with the stability of integrating ball sensor?

Ophir integrating sphere sensors 3A-IS and 3A-IS-IRG have a white diffuse reflective coating inside the integrating sphere. The sensitivity of the sensor is very sensitive to the reflectivity of the coating. A 1% increase in coating absorption will result in a 5% change in reading. Therefore, care must be taken not to smear or damage the white coating of the sensor. In addition, sensors should be recalibrated annually.

How to deal with the power loss caused by the optical fiber related to calibration when using the optical fiber adapter?

All Ophir power meters, including photodiode power meters, have an air gap between the fiber tip and the sensor. In measuring the power transmitted from the optical fiber to the air, no reflection loss in the optical fiber is considered. Therefore, if, in practice, the optical fiber will be coupled to another element without loss, the loss should be added to the reading (these losses are usually about 4%).