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Optical Output
Polarization Maintaining Fiber
Angled and Straight Contact Connectors
Keysight 81940A, 44A, 49A, 80A & 89A Compact TLS Modules User's Guide
A Polarization maintaining fiber (PMF) output is standard for Keysight
81940A, 44A, 49A, 80A & 89A Tunable Laser Source Family.
PMF is aligned to maintain the state of polarization. A well defined state of
polarization helps ensure constant measurement conditions.
The fiber is of Panda type, with TE mode in the slow axis in line with the
connector key.
Stress Rods
Slow Axis (Polarization Axis)
Not to Scale
Figure 6
PMF Output Connector
See
Chapter 2
Accessories,
details on connector interfaces and accessories.
Angled contact connectors are available as an option for Keysight 81940A,
44A, 49A, 80A & 89A Tunable Laser Source Familys.
Angled contact connectors help you to control return loss, since reflected
light tends to reflect into the cladding, reducing the amount of light that
reflects back to the source.
E
Connector Key
Fiber Cladding
H
Fiber Core
(8-µm Diameter)
Modules and Options
on page 26 for further
Getting Started
1
21
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