Title:
【発明の名称】プレーナ導波路
Document Type and Number:
Japanese Patent JPH10505924
Kind Code:
A
Abstract:
The invention relates to the production of planar optical waveguides which comprise composite path regions, e.g. for lasers. A path layer (12) of a first glass composition is deposited and selectively etched to produce path regions of said first glass composition. Thereafter a soot of a second glass is deposited in an amount calculated to replenish the removed material. The soot is fused to produce a composite layer comprising said path regions and said second glass optically connected thereto. The second glass composition is selectively illuminated to increase its refractive index to produce path regions interconnected with the path regions of the first glass composition. The second glass is either photosensitive as deposited or it is treated to render it photosensitive before exposure. The first glass composition preferably contains a lasing dopant, e.g. erbium, and the second glass contains no lasing dopant.
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Inventors:
Maxwell, Graeme, Douglas
Ainsley, Benjamin James
Ainsley, Benjamin James
Application Number:
JP51070495A
Publication Date:
June 09, 1998
Filing Date:
September 22, 1995
Export Citation:
Assignee:
BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY
International Classes:
G02B6/12; G02B6/13; G02B6/132; (IPC1-7): G02B6/13; G02B6/12
Attorney, Agent or Firm:
Takehiko Suzue (4 outside)