规格参数/功能描述：Specifications at a glance for the 81625A:
 
  - Wavelength Range: 850 to 1650 nm
   - Detector Type (Sensor Element): InGaAs
   - Detector Size (diameter): 5 mm
   - Power Range: +20 to -80 dBm
   - Wavelength Accuracy (Uncertainty): +/- 4.0% (950 to 1630 nm)
   - No Analog Output

The Agilent 81625B optical heads are specially designed for low PDL , low spectral ripple and high return loss and are used for optical component tests. The optical heads have to be operated with the single (Agilent 81618A) or dual (Agilent 81619A) interface modules. The heads come with a magnetic D-shape adapter and provide a safe stand. They are used in lightwave mainframe models 8163A/B, 8164A/B and 8166A/B.

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