Monitoring apparatus and method for polarization scrambler and optical transmission apparatus
AssigneeFujitsu Limited
InventorsShinichi KANEKO, Shinichiro Harasawa, Kenji Ohta
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Abstract
There are provided a polarized light passing device to pass therethrough specific polarized light, of output light of a polarization scrambler; and a detecting unit to detect a modulation component according to a frequency of a polarization control signal from the light which passes through the polarized light passing device.
Claims13
A monitoring apparatus for a polarization scrambler which scrambles a state of polarization of input light in accordance with a polarization control signal, the monitoring apparatus comprising:
- a polarized light passing device to pass therethrough specific polarized light, of output light of the polarization scrambler;
- and
- a detecting unit to detect a modulation component according to a frequency of the polarization control signal from the light which passes through the polarized light passing device.
An optical transmission apparatus, comprising:
- a polarization scrambler to scramble a state of polarization of input light;
- a polarization control unit to control the scrambling by providing a polarization control signal to the polarization scrambler;
- a polarized light passing device to pass therethrough specific polarized light, of output light of the polarization scrambler;
- and
- a detecting unit to detect a modulation component according to a frequency of the polarization control signal from the light which passes through the polarized light passing device.
A method for monitoring a polarization scrambler which scrambles a state of polarization of input light in accordance with a polarization control signal, the method comprising:
- passing specific polarized light, of output light of the polarization scrambler, through a polarized light passing device;
- and
- detecting a modulation component according to a frequency of the polarization control signal from the light which passes through the polarized light passing device.
Dependencies are inferred from the claim text.