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Polarization-adjustment-free phase error measurement of an arrayed-waveguide grating by optical low coherence interferometry

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2 Author(s)
K. Takada ; NTT Photonics Labs., Ibaraki, Japan ; M. Abe

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.

Published in:

IEEE Photonics Technology Letters  (Volume:14 ,  Issue: 8 )