Title:
OPTICAL WAVEGUIDE AND OPTICAL PARTS, AND MANUFACTURE THEREOF
Document Type and Number:
Japanese Patent JP3224087
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To make the polarization dependency dissoluble in the composite spectral characteristics of an optionally designed array waveguide type diffraction grating, by providing an ion-implated layer at a core bottom face part using an ion implantation.
SOLUTION: After a lower clad layer 2 is provided on a plane substrate 1, an ion-implanted layer 3 is formed on the lower clad layer 2 by an ion implantation. After a core layer 4 is provided on the ion-implanted layer 3, a core part 5 is formed by etching, and an upper clad layer 6 is formed on the ion- implanted layer 3 and the ore part 5 to embed the core part 5. The change of the stress field near core glass or the change of a refractive index of the ion implanted layer 3 is therefore induced to obtain an optical waveguide and optical parts with polarization dependency. Since the ion implanted layer 3 is formed being embedded in glass, nonpolarizing action can be maintained semipermanently. Furthermore, since the ion implanted layer 3 formed by the ion-implantation is optically homogeneous glass, there is no possibility of the ion implanted layer 3 causing the loss and extinction ratio degradation of the optical waveguide.
Inventors:
Kuninori Hattori
Kazuyuki Moriwaki
Atsushi Abe
Kazuyuki Moriwaki
Atsushi Abe
Application Number:
JP3954197A
Publication Date:
October 29, 2001
Filing Date:
February 24, 1997
Export Citation:
Assignee:
Nippon Telegraph and Telephone Corporation
International Classes:
G02B6/13; G02B6/12; H01P5/00; (IPC1-7): G02B6/13
Domestic Patent References:
| JP511131A | ||||
| JP8220359A |
Attorney, Agent or Firm:
Yoshikazu Tani (1 person outside)