Title:
【発明の名称】光学素子
Document Type and Number:
Japanese Patent JPH0627914
Kind Code:
B2
Abstract:
In an optical element having an optical waveguide (2) and flat electrodes (3A, 3B) arranged on a substrate (1) in which an electric field is applied through the flat electrodes (3A, 3B) to the substrate (1) and the optical waveguide (2) so that a refractive index of a portion of the substrate (1) in the vicinity of the optical waveguide (2) is varied to interrupt a light beam propagating through the optical waveguide (2), the flat electrodes (3A, 3B) are disposed asymmetrically about the optical waveguide (2). The optical modulation, optical switching or the like can be carried out by electrically controlling the difference between refractive indices of the optical waveguide (2) and the substrate (1) in the horizontal direction, so that the nonuniformity of the refractive index of the optical waveguide (2) which causes some problems in conventional branching interference type optical modulator and directional optical coupler do not cause any problem. The optical element has a higher light extinction ratio and the output light is by far stabilized against the variation in temperature.
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Inventors:
TAKIZAWA KUNIHARU
Application Number:
JP5183785A
Publication Date:
April 13, 1994
Filing Date:
March 15, 1985
Export Citation:
Assignee:
JAPAN BROADCASTING CORP
International Classes:
G02B6/122; G02F1/03; G02F1/035; G02B6/12; G02F1/05; (IPC1-7): G02F1/035
Domestic Patent References:
| JP5744128A | ||||
| JP559534A |
Attorney, Agent or Firm:
Yoshikazu Tani
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