User`s guide

Getting Started with Optical Heads What is an Optical Head?
16 Agilent 81618A/9A and Agilent 81623B/4B/6B/8B Optical Heads, Fourth Edition
Heat Sink for 81628B optical Head
The 81628B optical head has a heat sink that allows an extended operating
power range. This heat sink must be mounted on the integrating sphere for
operation from 34 dBm to 38 dBm.
Attaching the heat sink to the 81628B
Optical Head
Applicable adapters
Agilent adapters types 81000xx, 81000BT are applicable to the 81628B
with the heat sink attached (without the heatsink and up to 34dBm the
81000BT bare fiber adapter may be attached). Bare fibers are not intended
to be used in high power applications.
Always attach the heat sink and rubber ring to the 81628B if operating at
an optical power higher than 34dBm!
NOTE
If shipping the 81628B high power optical head please detach the heatsink
from the optical head to avoid damage during transportation.
NOTE