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Silicon Optical Power Head

The 81620C Optical Power Head features a large-area silicon detector. It operates in the wavelength range from 450 nm to 1020 nm at low noise, and thus is the best choice for measurements at 850 nm.

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  • Sensor type

    Si

  • Wavelength range

    450 nm to 1020 nm

  • Power range

    +10 dBm to -90 dBm

  • Type

    Head

  • Uncertainty at reference conditions

    ± 2.2%

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Highlights

The new 81620C optical power head provides a 5 mm detector area and allows flexible placement of the remote optical power meter, which is then connected to the N7749C. The 81620C accepts parallel beams with up to 4 mm diameter, standard SM fiber and MM fiber with max. 100 μm core diameter, NA ≤ 0.3. A wide choice of adapters allows input from popular fiber connector types, bare fibers or open beams. The magnetic D-shaped adapters allow rapid removal and replacement without twisting attached fibers.

N7749C interface for two or four optical power heads

  • Controls the remote heads
  • Sample averaging times ranging from 100 µs to 10 s for all heads
  • Readout over LAN and USB interfaces with built-in web-browser GUI
  • SCPI command set common to Keysight optical power meters
  • Power values logged with dual-1M sample buffers for each head, to sample continuously with internal or external triggering
  • Uninterrupted simultaneous measurement and readout minimize overhead time for repetitive measurements
  • Family-wide, common trigger concept

Analog output port perfect for automated alignment

  • Direct feedback for optimization processes like fiber alignment with analog voltage outputs, at the remote head itself and from the N7749C front panel
  • Either linear proportional to the optical signal power or logarithmic over decades of power levels.

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