Ian Forsyth, David (2026) Cascaded SOA FWM with non-uniform ASE seeding: Expanding a low-cost DWDM system from 12 to 20 channels. International Journal of Research and Innovation in Applied Science (IJRIAS), XI (V). pp. 288-297. ISSN 2454-6194
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Abstract
This paper extends a low-cost wavelength-division multiplexing (WDM) source from 12 to 20 dense wavelength-division multiplexed (DWDM) channels using a cascaded semiconductor optical amplifier (SOA) architecture — without requiring any coherent lasers. A second SOA stage, seeded by the 12-channel output of the first stage (derived from three non-uniformly spaced, spectrum-sliced ASE inputs from a single high-power LED), generates eight additional four-wave mixing (FWM) components. The non-uniform input spacing (0.3 THz and 0.4 THz) deliberately inhibits a fully populated frequency comb, producing a finite, structured, and manufacturable channel set. Performance reveals a practical trade-off: the three original inputs exceed 195 km, while the eight cascaded channels are limited to 25–100 km — fully viable for urban and distribution links. Compared with conventional laser-array DWDM systems, the proposed design offers significantly lower cost and complexity. Future experimental validation under real-world conditions is recommended, alongside simplified diagrams and application scenarios to improve accessibility for students and industry practitioners.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Four-wave mixing, Semiconductor optical amplifier, ASE, Spectrum slicing, Cascaded SOA |
| Divisions: | Faculty Of Electronics And Computer Technology And Engineering |
| Depositing User: | Sabariah Ismail |
| Date Deposited: | 20 Jul 2026 08:10 |
| Last Modified: | 20 Jul 2026 08:10 |
| URI: | http://eprints.utem.edu.my/id/eprint/30146 |
| Statistic Details: | View Download Statistic |
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