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https://ptsldigital.ukm.my/jspui/handle/123456789/486828Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.advisor | Mohd Syuhaimi Ab. Rahman, Prof. Ir. Dr. | - |
| dc.contributor.author | Farhat M. Shaltami (P62286 ) | - |
| dc.date.accessioned | 2023-10-11T02:25:49Z | - |
| dc.date.available | 2023-10-11T02:25:49Z | - |
| dc.date.issued | 2017-04-13 | - |
| dc.identifier.other | ukmvital:86187 | - |
| dc.identifier.uri | https://ptsldigital.ukm.my/jspui/handle/123456789/486828 | - |
| dc.description | The growth of high speed networks has opened opportunities for fiber-to-office and fiber-to-home broadband access networks. Nevertheless, this growth needs cost effective optical network units. Hence, semiconductor optical amplifiers (SOAs) are widely used as light sources for optical network units (ONUs). The advantage of using SOA is that it is low in cost and improves the flexibility of a network. Even though SOA-based ONU offers a cost-effective and flexible solution, it still has some limitations. SOA-based ONU only works with good seeding power from optical line terminal (OLT). Downstream loss to the budget is due to the distance and splitting ratio, which also reduces the seeding power and the RSOA saturation. In this dissertation, a new scheme based on a combination of remote and self-seeding (RSS) is proposed. In the RSS scheme, the OLT sends coherent seeding light to the ONU, whereas the SOA amplifies the seeding light and sends it back. Meanwhile, the FBG reflects a small percentage of the output power back to the RSOA to enforce the seeding light, while the rest of the light power is applied as output power. In this way, the SOA saturation is guaranteed to suppress the amplified spontaneous emission (ASE) and improve the optical signal to noise ratio (OSNR). The RSS scheme is implemented using Optisystem. The simulation results are verified through theoretical analysis using Matlab. The results show the sensitivity of the upstream channel's receiver side for both schemes. In the remote seeding scheme, sensitivity increases as seeding power increases. In the saturation region, the sensitivity of the receiver side reaches a maximum value of about -24 dBm. In the RSS scheme, sensitivity is high and constant at all seeding power values at -24 dBm. Simulation results match well to theoretical results. OSNR is higher in the RSS scheme with about 30 dB at between 1515 nm and 1585 nm. Also, the two seeding schemes are used in a power-splitting-based passive optical network. In remote seeded SOA, increasing the splitting ratio significantly affects upstream performance, while in remote-and-self-seeded SOA, the upstream performance is stable up to splitting ratio 1:2000, which helps to increase the number of users.,Certification of Master's/Doctoral Thesis" is not available | - |
| dc.language.iso | eng | - |
| dc.publisher | UKM, Bangi | - |
| dc.relation | Faculty of Engineering and Built Environment / Fakulti Kejuruteraan dan Alam Bina | - |
| dc.rights | UKM | - |
| dc.subject | Optical network | - |
| dc.subject | Semiconductor | - |
| dc.subject | Amplifier | - |
| dc.subject | Fiber | - |
| dc.subject | Universiti Kebangsaan Malaysia -- Dissertations | - |
| dc.title | Sourceless optical network unit based on combination of remote and self seeding schemes | - |
| dc.type | Theses | - |
| dc.format.pages | 121 | - |
| dc.identifier.barcode | 002682(2017) | - |
| Appears in Collections: | Faculty of Engineering and Built Environment / Fakulti Kejuruteraan dan Alam Bina | |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| ukmvital_86187+SOURCE1+SOURCE1.0.PDF Restricted Access | 288.14 kB | Adobe PDF |  View/Open |
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