Title:
SEMICONDUCTOR OPTICAL ELEMENT
Document Type and Number:
Japanese Patent JP3112105
Kind Code:
B2
Abstract:
PURPOSE: To obtain a variable wavelength light source having an ultra large band by using an array waveguide type grating as a wavelength selecting mechanism.
CONSTITUTION: Focal planes 14A, 14B and arc surfaces 15A, 15B on the side remote from the former, are connected by a plurality of array waveguides 16 having a constant length between each adjacent waveguides. Meanwhile, a gain waveguide semiconductor substrate 11A is formed with a plurality of gain waveguides 17 having a normal semiconductor structure and connected to the focal plane 14A of a sector shape slab waveguide 13A, and a gain waveguide semiconductor substrate 11B is formed a single output waveguide 18 connected with the focal plane 14B of a sector shape slab waveguide 13B. In this arrangement, an optical circuit composed of the sector shape waveguides 13A, 13B and the array waveguides 16 is the so-called array waveguide type grating having a function the same as that of a refraction grating type merging and branching filter.
Inventors:
Masahiro Ikeda
Application Number:
JP26640091A
Publication Date:
November 27, 2000
Filing Date:
October 15, 1991
Export Citation:
Assignee:
Nippon Telegraph and Telephone Corporation
International Classes:
G02B6/12; H01L27/15; H01S5/00; H01S5/026; H01S5/10; G02B6/34; (IPC1-7): G02B6/12; H01S5/026; H01S5/10
Domestic Patent References:
| JP1164929A | ||||
| JP2244105A |
Attorney, Agent or Firm:
Tadataka Mitsuishi (2 outside)