Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor | Department of Electrical Engineering | en_US |
| dc.contributor.advisor | Tam, Hwa-yaw (EE) | en_US |
| dc.creator | Tsang, Ming Yan | - |
| dc.identifier.uri | https://theses.lib.polyu.edu.hk/handle/200/11872 | - |
| dc.language | English | en_US |
| dc.publisher | Hong Kong Polytechnic University | en_US |
| dc.rights | All rights reserved | en_US |
| dc.title | Stimulated Brillouin scattering effect in delivery fibre of high-power narrow linewidth laser | en_US |
| dcterms.abstract | Stimulated Brillouin scattering (SBS) is a non-linear effect that dominates at high-power narrow linewidth laser. Since high-power laser can have a longer range of detection in LIDAR application, it is important to increase the SBS threshold in order to achieve higher output power. The objectives of this project are to study the SBS effect in different kinds of optical fibers and to increase the SBS threshold by tapering the delivery fiber of high-power narrow linewidth pulsed amplifier operating at 1.55µm. The performances of the fiber laser without tapered fiber and that with tapered fiber are compared experimentally. The delivery fiber under tested is a large diameter fiber (LDF) with core diameter of 25 µm and cladding diameter of 300 µm. The variation in core/cladding diameter ratio and the variation in up and down taper length are studied respectively. The tapered fiber with waist diameter of 100 µm was found to increase the SBS threshold by 10%. Among the experimental data, the best up and down taper length was found to be 12.5 mm. | en_US |
| dcterms.extent | vi, 27 pages : color illustrations | en_US |
| dcterms.isPartOf | PolyU Electronic Theses | en_US |
| dcterms.issued | 2019 | en_US |
| dcterms.educationalLevel | M.Sc. | en_US |
| dcterms.educationalLevel | All Master | en_US |
| dcterms.LCSH | High power lasers | en_US |
| dcterms.LCSH | Optical fibers | en_US |
| dcterms.LCSH | Brillouin scattering | en_US |
| dcterms.LCSH | Hong Kong Polytechnic University -- Dissertations | en_US |
| dcterms.accessRights | restricted access | en_US |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 6360.pdf | For All Users (off-campus access for PolyU Staff & Students only) | 605.71 kB | Adobe PDF | View/Open |
Copyright Undertaking
As a bona fide Library user, I declare that:
- I will abide by the rules and legal ordinances governing copyright regarding the use of the Database.
- I will use the Database for the purpose of my research or private study only and not for circulation or further reproduction or any other purpose.
- I agree to indemnify and hold the University harmless from and against any loss, damage, cost, liability or expenses arising from copyright infringement or unauthorized usage.
By downloading any item(s) listed above, you acknowledge that you have read and understood the copyright undertaking as stated above, and agree to be bound by all of its terms.
Please use this identifier to cite or link to this item:
https://theses.lib.polyu.edu.hk/handle/200/11872