SEMICONDUCTOR OPTICAL ELEMENT AND ITS MANUFACTURE

Title:

SEMICONDUCTOR OPTICAL ELEMENT AND ITS MANUFACTURE

Document Type and Number:

Japanese Patent JP3450210

Kind Code:

B2

Abstract:

PROBLEM TO BE SOLVED: To prevent injection of a current to a spot size transformation part.
SOLUTION: A semiconductor optical element comprises a laser for oscillating a laser by applying a voltage; and a spot size transformation part for transforming an optical spot size. A waveguide layer 12 is formed on an n-type clad layer 11 formed on an n-type substrate 10, and propagates lights, and a layer thickness is substantially constant in a laser and is continuously continued in the spot size transformation part. A p-type current block layer 14 and an n-type current block layer 15 are formed in the spot size transformation part on a first p-type clad layer 13 formed on the waveguide layer 12, thereby preventing inflow of a current into the spot size transformation part by an inverse joint. A second p-type clad layer 16 is formed in the laser on the first p-type clad layer 13, and has higher carrier concentration than the p-type current block layer 14. A metal current 19 is formed on the second p-type clad layer 16.

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Inventors:

Yuichiro Okunuki

Application Number:

JP5209399A

Publication Date:

September 22, 2003

Filing Date:

March 01, 1999

Export Citation:

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Assignee:

NEC Electronics Corporation

International Classes:

G02B6/122; H01S5/00; H01S5/026; (IPC1-7): H01S5/026; G02B6/122

Domestic Patent References:

JP766502A
JP11186667A

Attorney, Agent or Firm:

Mitsuru Kimura

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