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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 5073892 B1

PDFFull Text
Date of Patent:
Dec. 17, 1991

Filed:

Jun. 07, 1990

Semiconductor laser device

Applicant:
Inventors:

Kazuhisa Uomi, Hachioji, JP;

Tsukuru Ohtoshi, Kokubunji, JP;

Tomonobu Tsuchiya, Kodaira, JP;

Shinji Sasaki, Komoro, JP;

Naoki Chinone, Chofu, JP;

Assignee:

Hitachi, Ltd., Tokyo, JP;

Attorney:

Kenyon & Kenyon

Primary Examiner:

Georgia Epps

Int. Cl.
CPC ...
H01S / ;
U.S. Cl.
CPC ...
372 45 ; 372 46 ; 372 26 ; 372 28 ;
Abstract

A semiconductor laser device of the field modulation type includes a structure in which the threshold carrier density for laser oscillation is reduced so as to enable an effective action of a modulated electric field applied externally on an active region for radiating light, thereby enabling an extremely high speed modulation. A quantum structure which does not fulfill the charge neutrality condition for free-carriers or a strained super lattice structure is adopted as the structure in which the threshold carrier density is reduced.

Find Patent Forward Citations

Uomi, Kazuhisa. (1991). Semiconductor laser device (U.S. Patent No. 5073892). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5073892

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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