Abstract
A novel approach for an optical direct-sequence spread spectrum is presented. It is based on the complementary processes of broad-band parametric down-conversion and up-conversion. With parametric down-conversion, a narrow-band continuous-wave (CW) optical field is transformed into two CW broad-band white-noise fields that are complex conjugates of each other. These noise fields are exploited as the key and conjugate key in optical direct-sequence spread spectrum. The inverse process of parametric up-conversion is then used for multiplying the key by the conjugate key at the receiver in order to extract the transmitted data. A complete scheme for optical code-division multiple access (OCDMA) based on this approach is presented. The salient feature of the approach presented in this paper is that an ideal white-noise key is automatically generated, leading to high-capacity versatile code-division multiple-access configurations.
| Original language | English |
|---|---|
| Pages (from-to) | 1463-1471 |
| Number of pages | 9 |
| Journal | Journal of Lightwave Technology |
| Volume | 22 |
| Issue number | 6 |
| DOIs | |
| State | Published - Jun 2004 |
| Externally published | Yes |
Bibliographical note
Funding Information:Manuscript received November 10, 2003; revised February 12, 2004. This work was supported in part by the Yeda Research and Development Company, Limited, The Weizmann Institute of Science, Rehovot, Israel.
Funding
Manuscript received November 10, 2003; revised February 12, 2004. This work was supported in part by the Yeda Research and Development Company, Limited, The Weizmann Institute of Science, Rehovot, Israel.
| Funders | Funder number |
|---|---|
| Weizmann Institute of Science, Rehovot, Israel | |
| Yeda Research and Development Company |