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Slab-waveguide irradiation of UV laser light for photosensitive phase error compensation of arrayed-waveguide gratings

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

The photosensitive refractive index change in a slab waveguide was utilized to compensate for the phase error of an arrayed-waveguide grating. The UV laser irradiation of a slab waveguide has certain advantages. The irradiation of several different parts of the waveguide can compensate for a large phase error of the order of ten radians. Phase error compensation can be achieved even when there is no space on the arrayed-waveguide part to place a mask for irradiation.

Published in:

Photonics Technology Letters, IEEE  (Volume:14 ,  Issue: 6 )