Optical signal time-scaling arrangement
US6870968B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 14, 2001 |
| Grant date | Mar 22, 2005 |
| Priority date | — |
| Expiry date | Oct 28, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F7/00
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A signal time-scaling arrangement utilises a known configuration comprising the use of a laser which has its wavelength varied over time, a modulator coupled to the laser and to a modulating analogue electrical source and a dispersion means coupled to the output of the modulator and providing at its output a signal which is a stretched version of the analogue modulating signal, but provides for the modulator to be a single-sideband modulator instead of double-sideband. The effect of this is to enable the use of a much simple laser-control system involving a CW laser output which is wavelength-ramped continuously between quite narrow wavelength limits, while allowing the use of a dispersion means having a wide dispersion characteristic in order to provide the required degree of time-scaling. The invention is application to an ADC system or to a Doppler system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.