The 81628B optical power head has a built-in integrating sphere with wavelength-dependent calibration for accurate high power measurements. Distributing the power over a large surface away from the detector assures linearity and temperature stability. Functionality includes averaging time settings from 100 s to 10 s, automatic power ranging, monitoring of minimum and maximum values and logging up to 20k samples. Fiber adapters are available for common connector types. including bare fiber clamps. (see www.keysight.com/find/octaccessories)

The 81628B is used with the threaded type adapters. When the adapter is removed, the 8 mm diameter aperture is available for input to open beams or customized fiber holders. The heads are connected to the 816x mainframes using the 81618A single channel or 81619A dual-channel interface module.

Benefits

This measurement setup ensures the distribution of the high power equally to all parts of the sphere avoiding partial hot spots, which guarantess long lifetime and uncompromised reliability

8162xB Product Comparison

81623B

81623B-E01

81624B

81626B

81628B

Sensor element

Ge, 5 mm

Si, 5 mm

InGaAs, 5 mm

InGaAs, 5 mm

InGaAs

Wavelength range

750 nm to 1800 nm

450 nm to 1020 nm

800 nm to 1700 nm

850 nm to 1650 nm

800 nm to 1700 nm

Power range

+10 dBm to 80 dBm

+10 dBm to 90 dBm

+10 dBm to 90 dBm

+27 dBm to 70 dBm (1250nm 1650nm)
+23 dBm to 70 dBm (850nm 1650nm)

+40 dBm to 60 dBm (800nm 1700nm)

Relative uncertainty
-due to polarization
-spectral ripple
(due to interference)

< 0.01 dB
(typ. < 0.005 dB)
< 0.006 dB
(typ. < 0.003 dB)

_ 0.005 dB
(typ. 0.002 dB)
_ 0.005 dB
(typ < 0.002 dB)

_ 0.005 dB
(typ. 0.002 dB)
_ 0.005 dB
(typ. < 0.002 dB)

typ. _ 0.006 dB

High input power levels up to +40 dBm with Integrating sphere

Integrating sphere for high power levels of +40 dBm

Wide 8 mm diameter aperture

Detachable heatsink for input power above 2W

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