Method and apparatus for generating optical polar return-to-zero amplitude modulation signal using reflective semiconductor optical amplifier and wavelength-division-multiplexed passive optical network system using the same
US9819417B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 12, 2016 |
| Grant date | Nov 14, 2017 |
| Priority date | — |
| Expiry date | Jan 12, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J14/0282
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The present invention can operate a reflective semiconductor optical amplifier at ultrahigh speed using a polar return-to-zero (RZ) modulation method, and operate a reflective semiconductor optical amplifier (RSOA) whose modulation bandwidth is limited at ultrahigh speed by generating signals vertically symmetrical using a newly suggested polar RZ signal generator when generating an amplitude modulation signal at a transmission end. The present invention can overcome the problem that a modulation speed cannot be increased to 10 Gb/s or above due to signal distortion by inter-symbol-interference when generating an ultrahigh speed amplitude modulation signal using an RSOA of low price having a very narrow modulation bandwidth in an RSOA-based optical network. Also, the present invention has an effect of receiving the generated amplitude modulation signal through a direct detection receiver which is cost-effective and simple, and further has an effect of enabling ultrahigh speed operation of the RSOA-based WDM PON.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.