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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 9686018 B1

PDFFull Text
Date of Patent:
Jun. 20, 2017

Filed:

Mar. 18, 2016

Optical transmitter emitting light with narrowed linewidth

Applicant:

Sumitomo Electric Industries, Ltd., Osaka, JP;

Inventor:

Katsumi Uesaka, Yokohama, JP;

Assignee:

SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka, JP;

Attorney:

Smith, Gambrell & Russell, LLP.

Primary Examiner:

David Payne

Assistant Examiner:

Casey Kretzer

Int. Cl.
CPC ...
H04B 10/572 (2013.01); H01S 5/0625 (2006.01); H01S 5/0683 (2006.01); H01S 5/022 (2006.01); H01S 5/068 (2006.01); G02B 5/28 (2006.01); H01S 5/12 (2006.01); H01S 5/026 (2006.01); H01S 5/06 (2006.01); H01S 5/0687 (2006.01);
U.S. Cl.
CPC ...
H04B 10/572 (2013.01); G02B 5/284 (2013.01); H01S 5/02256 (2013.01); H01S 5/0687 (2013.01); H01S 5/06258 (2013.01); H01S 5/06817 (2013.01); H01S 5/06832 (2013.01); H01S 5/0261 (2013.01); H01S 5/0612 (2013.01); H01S 5/1209 (2013.01);
Abstract

An optical transmitter that narrows the linewidth of its output light is disclosed. The optical transmitter includes a wavelength tunable laser diode (LD) known as a CSG-DR LD integrated with a semiconductor optical amplifier (SOA) driven in a constant magnitude mode. The wavelength of the light output from the LD is determined by transmission through an etalon filter. The optical transmitter feeds the output of the etalon filter back to an injection current supplied to the LD to reduce phase noise inherently contained in the output light.

Find Patent Forward Citations

Uesaka, Katsumi. (2017). Optical transmitter emitting light with narrowed linewidth (U.S. Patent No. 9686018). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9686018

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

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