All optical sampling by slanted light interrogation for cross-correlated encoded recording (slicer)
US10317774B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 11, 2017 |
| Grant date | Jun 11, 2019 |
| Priority date | — |
| Expiry date | Sep 17, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/07
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Single-shot transient optical signals are recorded in a time regime of picoseconds to nanosecond. An auxiliary pump beam is crossed through the signal to sample a diagonal ‘slice’ of space-time, analogous to a rolling shutter. The slice is then imaged onto an ordinary camera, where the recorded spatial trace is a direct representation of the time content of the signal. The pump samples the signal by optically exciting carriers that modify the refractive index in a conventional semiconductor wafer. Through use of birefringent retarders surrounding the wafer, the integrating response of the rapidly excited but persistent carriers is differentiated by probing with two polarization-encoded time-staggered signal replicas that are recombined to interfere destructively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.