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:
Sep. 17, 2019
Filed:
Jul. 18, 2018
Vladan Vuletic, Cambridge, MA (US);
Boris Braverman, Calgary, CA;
Akio Kawasaki, Palo Alto, CA (US);
Megan Yamoah, Cambridge, MA (US);
Edwin Eduardo Pedrozo Penafiel, Cambridge, MA (US);
Vladan Vuletic, Cambridge, MA (US);
Boris Braverman, Calgary, CA;
Akio Kawasaki, Palo Alto, CA (US);
Megan Yamoah, Cambridge, MA (US);
Edwin Eduardo Pedrozo Penafiel, Cambridge, MA (US);
Massachusetts Institute of Technology, Cambridge, MA (US);
Abstract
An optical and electronic feedback system can be used to significantly narrow the linewidth of distributed Bragg reflector lasers (DBRs) by reducing the high-frequency noise in the laser spectrum. An optical feedback path reduces the high-frequency noise of the laser. An electric-optic modulator placed inside of this feedback path applies electronic feedback with a very large bandwidth, allowing for robust and stable locking to a reference cavity. In addition, the servo-electronic component greatly increases the long-term stability of the laser locking to an external reference cavity, allowing for low noise, long-term operation of the laser. Specifically, it suppresses the frequency noise spectral density and narrows the total linewidth from a free-running value of 100 kHz to 30 Hz. The resulting modified DBR laser is both precise and stable and has applications in optical clocks, quantum information science, and precision metrology.