User`s guide

What is an Optical Head? Getting Started with Optical Heads
Agilent 81618A/9A and Agilent 81623B/4B/6B/8B Optical Heads, Fourth Edition
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What is an Optical Head?
An optical head measures the power emitted from a connected single-
mode or multi-mode fiber or the power applied in an open parallel beam
(with max. 5 mm diameter). The wavelength and power range depends on
the sensor element.
Figure 1 Rear view of an Optical Head with Analog Output
Figure 2 Front View of Optical Head without Adapter
Figure 1 and Figure 2 show views of a typical optical head.
Screw to connector
adapter when fitted
Cable to interface
module
Analog output
Optical interface
connector adapter locking screws