Key Features & SpecificationsKey performance specifications

• Wide wavelength range: 750 – 1800 nm
• Economical germanium detector: recommended at 850 nm
• 5 mm diameter detector for fiber NA to 0.3 and open beams
• Special calibration option: ±2.5% uncertainty 800 – 1000 nm
• Special calibration option: ±1.7% uncertainty 1000 – 1650 nm

DescriptionThe 8162xB family of optical power heads provide accurate power measurements with a large area detector in a remote head for flexible positioning. 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 MT ribbon fiber connectors and bare fiber clamps. (see www.keysight.com/find/octaccessories) The D-shaped adapter type are held magnetically for quick adapter change. The heads also include a removable 81624DD adapter ring for use with the threaded type adapters. The heads are connected to the 816x mainframes using the 81618A single channel or 81619A dual-channel interface module.

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

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