G - Physics – 02 – B
Patent
G - Physics
02
B
G02B 5/26 (2006.01) G02B 6/124 (2006.01) G02B 6/34 (2006.01) H04J 14/02 (2006.01)
Patent
CA 2184453
A width of a core in an optical waveguide is decreased in accordance with a predetermined value, as a distance of a position of the core to the centre position thereof is decreased. Consequently, a rectangular spectrum property having no ripple is obtained on a lower wavelength side in a reflection grating. In addition, the width of the core is changed at the position Z in the direction of light propagation, while UV light is radiated to the core, so that a periodically-striated distribution of refractive indices having an envelope which is changed in accordance with a value of "¦sin(C~Z)¦/¦C~Z¦" is formed in the core of the optical waveguide, and the phase of light to be propagated in the direction of light propagation is shifted at the position Z as defined below by .pi.. Z=m.pi./C(m=...,-3,-2,-1,1,2,3,...) Thus, a rectangular spectrum property is obtained in a low-reflection grating.
Arai Hideaki
Uetsuka Hisato
G. Ronald Bell & Associates
Hitachi Cable Ltd.
LandOfFree
Optical device formed with grating therein, add/drop filter... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical device formed with grating therein, add/drop filter..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical device formed with grating therein, add/drop filter... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1685205