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:
Nov. 05, 2024
Filed:
Aug. 18, 2021
Applicant:
Applied Optoelectronics, Inc., Sugar Land, TX (US);
Inventors:
Assignee:
Applied Optoelectronics, Inc., Sugar Land, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
H01S 3/10 (2006.01); H01S 5/026 (2006.01); H01S 5/065 (2006.01); H01S 5/12 (2021.01); H01S 5/20 (2006.01); H01S 5/22 (2006.01); H01S 5/343 (2006.01); H01S 5/028 (2006.01);
U.S. Cl.
CPC ...
H01S 5/0265 (2013.01); H01S 5/026 (2013.01); H01S 5/0653 (2013.01); H01S 5/12 (2013.01); H01S 5/2022 (2013.01); H01S 5/22 (2013.01); H01S 5/34326 (2013.01); H01S 5/028 (2013.01); H01S 5/2054 (2013.01);
Abstract
The present disclosure is generally directed to an EML with a filter layer disposed between an active region of the EML and a substrate of the EML to absorb a portion of unmodulated light energy, and preferably the unmodulated light energy caused by transverse electric (TE) substrate mode. The filter layer preferably comprises a material with an energy band gap (Eg) that is less than the energy band gap of the predetermined channel wavelength to absorb unmodulated laser light.