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:
Oct. 08, 2024
Filed:
Jan. 09, 2023
Jiangsu Normal University, Jiangsu, CN;
Jindan Shi, Suzhou, CN;
Xian Feng, Suzhou, CN;
JIANGSU NORMAL UNIVERSITY, Jiangsu, CN;
Abstract
A laser and method for generating an electromagnetic wave signal having high phase coherence. A distributed reflective optical fiber laser resonant cavity is formed by a non-polarization-maintaining gain optical fiber and a pair of fiber Bragg gratings of which both ends are written by a femtosecond laser direct-writing and line-etching method. During optical fiber grating writing, a tiny included angle is introduced between the projection of a laser line-etching direction on a horizontal plane where a central axis of an optical fiber core is located and a radial direction of the optical fiber core, and a tiny included angle is introduced between the laser line-etching direction and the horizontal plane where the central axis of the optical fiber core is located. The laser resonant cavity generates a three-wavelength laser output signal and eventually a millimeter wave or terahertz wave is generated between the output signals for outputting.