Fiber Polarization Controller

If your application includes single mode fiber and requires linearly
polarized light, the FPC Series Polarization Controllers can be
easily implemented to convert elliptically polarized light in a single
mode fiber into another state of polarization, including linearly
polarized light. This polarization conversion is acheived by loading
the three paddles with a prescribed number of fiber loops and
adjusting their positions to control the output polarization state.
These polarization controllers utilize stress-induced birefringence to
create three independent fractional wave plates to alter the
polarization of the transmitted light in the single mode fiber by
looping the fiber into three independent spools.

The amount of birefringence induced in the fiber is a function of
the fiber cladding diameter, the spool diameter (fixed), the number
of fiber loops per spool, and the wavelength of the light. The fast
axis of the fiber, which is in the plane of the spool, is adjusted with
respect to the transmitted polarization vector by manually rotating
the paddles. Items FPC031, FPC032, FPC561, and FPC562 are
fiber polarization controllers that come preloaded with fiber. See
the table for fiber and connectorization details.

NOTE: The FPC030 works well with all of our single mode fibers.
For fibers with higher bend loss (e.g. Corning’s SMF-28e), use
model FPC560.