Key Features & Specifications

• 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

DescriptionThe 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 µ,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
	81620B	81623B	81624B	81626B	81628B
Sensor element	Si, Ø 5 mm	Ge, Ø 5 mm	InGaAs, Ø 5 mm	InGaAs, Ø 5 mm	InGaAs
Wavelength range	450 nm to 1020 nm	750 nm to 1800 nm	800 nm to 1700 nm	850 nm to 1650 nm	800 nm to 1700 nm
Power range	+10 dBm to –90 dBm	+10 dBm to –80 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)	&le, ± 0.005 dB(typ. ± 0.002 dB)&le, ± 0.005 dB(typ < ± 0.002 dB)	&le, ± 0.005 dB(typ. ± 0.002 dB)&le, ± 0.005 dB(typ. < ± 0.002 dB)	typ. &le, ± 0.006 dB

Learn more about Keysight Optical Power Measurement

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