THORLABS INT-POL-1300, Руководство по эксплуатации

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3 Detailed Description
INT-POL-1300 / page 11
The inline polarizer ensures a stable polarization of the input light, here a swept
source. The experimental set up is based on a Michelson Interferometer composed
by a fiber coupler, a reference and sample arm. The fiber coupler acts as a polariza-
tion independent beam splitter and combiner. For individual polarization control of
sample and reference arm a PC is build into each interferometer arm. The PC in the
sample arm is used to optimize the detection of birefringence of the sample. With the
PC in the reference arm it is possible to match the SOP of signal from the reference
and sample.
The focused beam is scanned over the sample with a scanning mirror. The reference
beam is reflected by a mirror and can be attenuated with a variable attenuator to
match the intensity of the back reflected light of the sample.
The polarization controller in front of the input enables polarization adjustment of the
signal to balance it at the S- and P- balanced detector. Data processing calculates
the phase retardation between the two channels at different sample depth.