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  • Savings of up to 90%
  • Fully Working
  • Calibrated or Tested
  • 30-Day Warranty
  • No Customization
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Keysight 81624B


InGaAs Optical Head, 5mm Diameter

Actual Instrument for sale
Keysight 81624B InGaAs Optical Head, 5mm Diameter
Stock photo of new instrument

From USD*6,764.50New Price 13,529.00 USD*

Keysight Store on eBay Buy Now6,764.50
Need a Quote? Request Quote
Shipping:Limited countries only
Support: 30 day, extendible warranty

Extendible in some cases, please check prior to purchasing.

* See DisclaimerThe Used Equipment web is currently available in English only and pricing is in USD for the United States. Prices for other countries will vary. Contact us for local pricing.

Cannot ship to:

European Union

Unit only ships within China.

Unit ships worldwide.

Do you have any questions or need help before purchasing?
Oliver WittigGlobal Program ManagerContact us

Key Features

Key performance specifications

Special calibration options

  • ±1.5% uncertainty with special calibration
  • ±0.8% uncertainty with PTB calibration

The Keysight 81624B optical power heads provide the highest accuracy and are specially designed for low polarization dependence, low spectral ripple and high return loss.

The 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 µs 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 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.


  • Low relative uncertainty reduces the impact of connectorizing and fiber handling and leads to a robust test setup
  • The large area detector is less susceptible for connector misalignment and guarantees highly repeatable measurement results. Lower power per mm² makes the optical head more suitable for high power measurements and guarantees better linearity
 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)
≤ ± 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

* Disclaimer:

  • Prices shown in USD, estimated based on the configuration and assuming the customer location is in the USA.
  • The prices shown are in USD, as listed on eBay. Conversion to other currencies happens on purchase.
  • The prices shown are in CNY, as listed on Alibaba. Conversion to other currencies happens on purchase.
  • The saving percentages are relative to the list price of a new instrument. Actual percentages may vary based on option configuration of the desired equipment, currency exchange rates, and other factors. Premium Used special promotion discounts may or may not be eligible for customers with Keysight Purchase Agreements.
  • Prices and availability information are subject to change without notice. All net transaction prices may vary due to delivery terms, sales tax, VAT, duties and exchange rate variations. Products not available in all locations.
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