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:
Feb. 14, 1995
Filed:
Jun. 13, 1994
Stephen A Miller, Upland, CA (US);
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Abstract
An apparatus and method for stabilizing laser light wavelength relative to resonant optical absorption works with both continuous wave and pulsed lasers and employs the phenomenon of Zeeman energy level splitting to provide a error signal indicative of both the direction and magnitude of wavelength error. A laser system including a wavelength adjusting means produces laser light at a wavelength which differs by an adjustable amount from a resonant absorption wavelength of a selected substance. A first portion of the laser light is propagated through a right circular polarizing means to provide right circularly polarized (RCP) laser light. RCP laser light is propagated through a first volume occupied by the selected substance, said first volume being disposed in a magnetic field. The magnetic field vector is substantially parallel to the direction of laser light propagation within the first volume. A second portion of the laser light is propagated through a left circular polarizing means to provide left circularly polarized (LCP) light. LCP light is propagated through a second volume occupied by the selected substance, the second volume being disposed likewise in a magnetic field with magnetic field vector substantially parallel to the line of laser light propagation within the volume. First detecting means is provided to selectively detect fluorescence light produced by RCP laser light and produce a first signal. Second detecting means is provided to selectively detect fluorescence light produced by LCP laser light and produce a second signal. A signal processing means is adapted to process the first signal and the second signal and to produce an error signal indicating the direction and magnitude of difference between the laser light wavelength and the desired wavelength. The error signal is converted into a controlling signal which is provided to the wavelength adjusting means to stabilize the wavelength of the laser light at the desired value.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile