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.:
Date of Patent:
Dec. 03, 2002
Filed:
Mar. 21, 2001
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
Provided is a light emitting module that capable of adjusting the wavelength of light generated under operating conditions. The light emitting module is provided with a semiconductor light emitting device , first and second photodetectors , and an etalon . The semiconductor light emitting device has a first end face and a second end face , and an active layer between the first end face and the second end face . Each of the photodetectors is located so as to receive transmitted light from the first end face of the semiconductor light emitting device. The etalon has a portion of a first thickness d located between the first end face and the photodetector , and a portion of a second thickness d located between the first end face and the photodetector . The first thickness d of the etalon is different from the second thickness d