Electro-optic delay line frequency discriminator
US7176447B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 8, 2005 |
| Grant date | Feb 13, 2007 |
| Priority date | — |
| Expiry date | Jul 28, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R23/17
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electro-optic delay line frequency discriminator has an optical signal source providing first and second optical signals that are directed along first and second paths, respectively. In the first path, the first optical signal is converted to a first corresponding optical signal that corresponds to an electrical input signal, and the first corresponding optical signal is then delayed. In the second path, the second optical signal is delayed, and the delayed second optical signal is then converted to a second corresponding optical signal that corresponds to the electrical input signal. The first and second corresponding optical signals are converted to first and second corresponding electrical signals, respectively; and a detector, responsive to the first and second corresponding electrical signals, provides an electrical output signal from the discriminator. Optical source relative intensity noise (RIN) is canceled out and does not degrade the signal-to-noise ratio of the discriminator output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.