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:
Jul. 23, 2024
Filed:
Nov. 05, 2020
The Regents of the University of California, Oakland, CA (US);
Constance J. Chang-Hasnain, Palo Alto, CA (US);
Kevin T. Cook, Berkeley, CA (US);
THE REGENTS OF THE UNIVERSITY OF CALIFORNIA, Oakland, CA (US);
Abstract
A widely tunable vertical-cavity surface-emitting laser (VCSEL) having a semiconductor cavity followed by an air-gap over which is a movable reflector. Lasing wavelength is controlled by a combination of the resonance of the semiconductor cavity, which is fixed, and the resonance of the air cavity, which can be changed by moving the reflector. Tuning range and slope of the VCSEL are increased by configuring the semiconductor cavity to be antiresonant at the center of the tuning range, which forces electromagnetic energy to be confined more strongly in the air gap than in the semiconductor, thus making emission wavelength more sensitive to the displacement of the tuning mirror.