Title :
Polarization-adjustment-free phase error measurement of an arrayed-waveguide grating by optical low coherence interferometry
Author :
Takada, Kazumasa ; Abe, Makoto
Author_Institution :
NTT Photonics Labs., Ibaraki, Japan
Abstract :
We report that the phase error distribution of an arrayed-waveguide grating can be measured precisely without adjusting the state of polarization in either arm of the interferometer. This is achieved by combining a 90/spl deg/ Faraday rotator and a polarizer with a depolarized light source in a conventional fiber-optic Mach-Zehnder interferometer.
Keywords :
Faraday effect; Mach-Zehnder interferometers; diffraction gratings; fibre optic sensors; light interferometry; measurement errors; optical arrays; optical testing; optical waveguides; Faraday rotator; arrayed-waveguide grating; depolarized light source; fiber-optic Mach-Zehnder interferometer; optical low coherence interferometry; phase error distribution; polarization-adjustment-free phase error measurement; polarizer; state of polarization; Arm; Arrayed waveguide gratings; Optical arrays; Optical crosstalk; Optical fiber polarization; Optical fiber testing; Optical interferometry; Optical polarization; Phase measurement; Phased arrays;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2002.1021996
