The Study of Waveband-Tunable Multiwavelength Fiber Laser
| Autor: | Jing Hsu, 許宜靜 |
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| Rok vydání: | 2010 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 98 In recent years, because optical communication industry grows fast, it promotes the development of the wavelength of 1300nm to 1600nm laser light source. The fiber laser structure is simple and connected with optical communication network compatibly due to the small insertion loss. Most importantly the fiber laser satisfies super broadband demand; its development is quite considerable. The waveband-tunable multiwavelength fiber laser is demonstrated in the erbium doped fiber amplifier and semiconductor optical amplifier with the in-line Sagnac interferometer and the interleaver. The schemes are introduced the method of nonlinear polarization rotation effect and hybrid gain medium to suppress the mode competition of homogeneous gain broadening of erbium-doped fiber laser(EDFL), and the laser has good lasing stability. Up to now, many academics have proposed nonlinear polarization effect improving mode competition of EDFL. Our systems are waveband tunable fiber laser and have never studied so far. We hope our structures can offer the reference to the future research. In the experiment, we observe the laser characteristic variation of laser linewidth, faltness, SNR, bandwidth and stability by changing the length of resonance cavity, the ratio of coupler and pump power. We compare our experimental result with former literature and expect to know the advantage and drawback of our system. We hope our system may make improvement in the further. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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