This research studied the polarization switching during theturned on of a VCSEL. The switching periods and beam profilewere investigated by the variation of the driving current and heat sink temperature of the laser. The laser would present a series of polarization switching before it achieved the stable state. At a laser¡¦s current of 5.5 mA, the laser first output in Y-polarization for a period of T1 after the laser was turned on. Then the laser switched to X-polarization and maintained for a period of T2. In the third period of T3, the laser switched to Y-polarization and followed by a final switch to X-polarization. We found that the switching periods would decrease under higher temperature and larger driving current, while the ratio of T2 /T1 and T3/T2 did not change, approximating to a constant of e2.We also found that the beam profile of X-polarization would change periodically with a period of 0.32 mA in the region of 3.5 to 6.0 mA. These results will help to understand the mechanism of the polarization switching when the
laser is turned on.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0622107-090715 |
| Date | 22 June 2007 |
| Creators | Chang, Wei |
| Contributors | Jang, Der-Jun, Kuo, Wang-Chuang, Tu, Li-Wei, Yen, Tsu-Chiang |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0622107-090715 |
| Rights | not_available, Copyright information available at source archive |
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