Invention Grant
- Patent Title: Measurement of small wavelength difference in coherent light using faraday effect
- Patent Title (中): 使用法拉第效应测量相干光中的小波长差
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Application No.: US13135974Application Date: 2011-07-06
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Publication No.: US08674688B2Publication Date: 2014-03-18
- Inventor: Allen D. Parks , Scott E. Spence
- Applicant: Allen D. Parks , Scott E. Spence
- Applicant Address: US DC Washington
- Assignee: The United States of America as Represented by the Secretary of the Navy
- Current Assignee: The United States of America as Represented by the Secretary of the Navy
- Current Assignee Address: US DC Washington
- Agent Gerhard W. Thielman, Esq.
- Main IPC: G01R33/02
- IPC: G01R33/02
Abstract:
An apparatus is provided for determining a target wavelength λ of a target photon beam. The apparatus includes a photon emitter, a pre-selection polarizer, a prism composed of a Faraday medium, a post-selection polarizer, a detector and an analyzer. The photon emitter projects a monochromatic light beam at the target wavelength λ substantially parallel to a magnetic field having strength B. The target wavelength is offset from established wavelength λ′ as λ=λ′+Δλ by wavelength difference of Δλ
Public/Granted literature
- US20120314215A1 Measurement of small wavelength difference in coherent light using faraday effect Public/Granted day:2012-12-13
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