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:
Jun. 25, 2019
Filed:
Oct. 27, 2015
Applicant:
Hamamatsu Photonics K.k., Hamamatsu-shi, Shizuoka, JP;
Inventors:
Assignee:
HAMAMATSU PHOTONICS K.K., Hamamatsu-shi, Shizuoka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S 5/34 (2006.01); H01S 5/022 (2006.01); H01S 5/12 (2006.01); H01S 5/024 (2006.01);
U.S. Cl.
CPC ...
H01S 5/3402 (2013.01); H01S 5/024 (2013.01); H01S 5/0228 (2013.01); H01S 5/02252 (2013.01); H01S 5/02288 (2013.01); H01S 5/12 (2013.01); H01S 5/3419 (2013.01); H01S 5/02208 (2013.01); H01S 5/02236 (2013.01); H01S 5/02415 (2013.01);
Abstract
A quantum cascade laser device has a light-absorbing cover member located between one emission end face of a quantum cascade laser element and an emission window of a housing. The emission end face and an opposing surface of a submount with respect to the cover member are flush with each other. The cover member has an opening at a position opposing the emission end face. The opening has a tapered first opening part increasing its diameter from the emission end face side to the emission window side and a second opening part formed with a fixed diameter not smaller than the smallest diameter of the first opening part.