Controlling the bends in a fiber optic cable to eliminate measurement error in a scanning terahertz sensor
US8314391B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 9, 2008 |
| Grant date | Nov 20, 2012 |
| Priority date | — |
| Expiry date | Jul 30, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/8609
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A terahertz time-domain spectrometer scanning sensor system includes a transmitter and a receiver that are secured to a mobile scanner head. Optical pump light, in the form of short pulses launched from a stationary laser located remotely from the scanner head, is delivered to the transmitter and receiver through a controlled fiber optic cable arrangement so that variations in temporal pulse relays that are associated fiber optic transmission are minimized. In this fashion, the movement of the fiber optic cable is maneuvered along a defined path so as to control the bends in the cable and thus minimize variations in temporal delays that can otherwise arise as the pulses of light are transmitted through the fiber. Pulses of laser light launched from the laser into the optical fiber will exit the cable with consistent (i) time of arrival, (ii) phase duration, and (iii) polarization state and energy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.