Abstract
An experimental demonstration of a two-channel OCDMA system with detection performed using standard linear detection or a TPA-based nonlinear detector is presented. These results show an improvement in the extinction ratio of the decoded signal by ∼5 dB using TPA detection. A simulation model of the TPA detector used during the experiments was created and used in a four-channel OCDMA system simulation using both linear and nonlinear detection methods. The simulation results show that error-free performance is achievable for a 4-user system using the nonlinear TPA detector while the OCDMA system employing linear detection is severely limited by the effects of noise generated by adjacent optical channels (multiple access interference).
| Original language | English |
|---|---|
| Pages (from-to) | 1281-1286 |
| Number of pages | 6 |
| Journal | Optics Communications |
| Volume | 282 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 1 Apr 2009 |
| Externally published | Yes |
Keywords
- Multiple access interference (MAI)
- Optical code division multiple access (OCDMA)
- Optical thresholding and detection
- Two-photon absorption (TPA)
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