This research investigated the spectra of two different semiconductor lasers subjected to optical feedback. For the vertical
-cavity surface-emitting laser (VCSEL),a wavelength selective element (Etalon) was used to feedback one of the transverse modes into the laser cavity. The experimental results showed that the multi-transverse modes could be suppressed to yield the fundamental mode output or a higher-order transverse mode output, in which the side-mode suppression ratio (SMSR) where 14.8 dB and 6.4 dB respectively. For the external cavity AR-coated laser, we studied the feasibility of generating mode-locking pulses by the temporal modulation of orthogonal-polarization optical feedback (OPF). The RF spectrum analyzer was employed to analyze the interaction. The observation clearly presented the spectra of mode- locking-like pulses in the laser¡¦s output.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0704106-154030 |
| Date | 04 July 2006 |
| Creators | Wang, Li-Ting |
| Contributors | Der-Jun Jang, Chie-Tong Kuo, Tsu-Chiang Yen |
| 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-0704106-154030 |
| Rights | restricted, Copyright information available at source archive |
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