User`s guide

Getting Started with Tunable Laser Sources Optical Output
22 Agilent 81689A, 81689B and 81649A Tunable Laser Modules User’s Guide, Third Edition
Optical Output
Polarization Maintaining Fiber
A Polarization maintaining fiber (PMF) output is available as an
option for Agilent 81689A, Agilent 81689B and Agilent 81649A
Compact Tunable Laser modules.
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..
Figure 6 PMF Output Connector
See “Accessories” on page 25 for further details on connector
interfaces and accessories.
Angled and Straight Contact Connectors
Angled contact connectors are available as an option for
Agilent 81689A, Agilent 81689B and Agilent 81649A Compact Tunable
Laser modules.
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
H
Slow Axis (Polarization Axis)
Connector Key
Fiber Cladding
Fiber Core
(8-µm Diameter)
Stress Rods
Not to Scale