Agilent/Keysight 81000SA – ST Connector Adapter

The Agilent/Keysight 81000SA is a DIN 47256/4108 connector adapter engineered for direct integration with Agilent/Keysight 815xxx and 816xxx series optical heads. This adapter enables connection of optical fibers terminated with DIN 47256/4108 connectors to compatible optical measurement systems, facilitating precise optical power characterization across extended wavelength ranges. The threaded 5mm mounting design ensures secure, repeatable fiber alignment for laboratory and production testing environments.

Technical Specifications

• Connector Type: DIN 47256/4108


• Wavelength Range: 1200 nm to 1650 nm (when used with compatible optical heads such as HP S1521B)


• Numerical Aperture: Up to 0.5


• Mounting: Threaded design for 5mm optical heads

Key Features

• Accepts optical fibers with DIN 47256/4108 termination


• Supports LED and LD chip power measurement


• Accommodates beam numerical apertures to 0.5 NA


• Threaded coupling for stable fiber positioning

Typical Applications

• Optical power measurement in research and development


• Manufacturing test and quality assurance


• LED and laser diode characterization


• Fiber optic system performance verification

Compatibility & Integration The 81000SA integrates with Agilent/Keysight 815xxx and 816xxx series optical heads. Alternative adapters in the 81000 series accommodate FC/PC/SPC/APC (81000FA), NEC D4 (81000GA), SC/PC/APC (81000KA), ST (81000VA), and Diamond HMS-10 (81000AA) connector types. Bare fiber configurations are supported via the 81000BA adapter. Optional accessories include a 1-inch filter holder (81000AF) and integrating sphere (81002FF) for specialized measurement configurations.