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The mechanical setup allows for the
application of uniform diametric load on an optical fiber and permits the
reproducible rotation of the fiber around its axis. Fig. 5-16 shows the
setup without the rotation system. The ball situated between the lever and the
upper glass/steel part, ensures the transmission of a uniform force on both
fibers from the suspended mass. Two fibers are used to ensure a perfect uniform
loading.
Fig. 5-16 : Side and Front view of the setup
The rotation system is based on a fiber
magnetic clamp holder (insert of Fig. 5-17). The angle between the
diametric load and the fiber is set with the metal handle that follows the
angle graduation written on the white half-disk (Fig. 5-17).
Fig. 5-17 : Pictures of the experimental setup for diametric load
(insert : rotation system)
The optical setup for Bragg wavelength
measurement in transmission is presented in Fig. 5-18. Another
configuration in reflection using a 3 dB coupler has also been realized.
Using a linearly polarized tunable laser and a polarization controller, each
polarization mode can be measured separately.
Fig. 5-18 : Transmission setup for Bragg wavelength measurement; TL :
tunable laser, POLA : polarization controller, D : detector
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