Abstract
We report the experimental and theoretical studies on the dynamics of a fiber ring laser system which contains a length of erbium doped fiber pumped at 980nm connected to a fiber loop consisting of a micro-optic gas cell and a tunable bandpass filter. Due to a long loop length ~60m of the system, the number of cavity modes present in the 1nm filter bandwidth is extremely large. As a result, the effect of spontaneous emission into these laser modes plays an important role in determining the dynamics of the laser. A theoretical model which incorporates the effect of spontaneous emission into multiple laser modes is described and it is shown to be in agreement with experimental results obtained. A detailed analysis has been performed on the relaxation oscillations induced during the transient operation of the laser with the aim of using it as a tool for obtaining laser parameters
| Original language | English |
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| Number of pages | 6 |
| Publication status | Published - 2004 |
| Event | 7th International Conference on Optoelectronics, Fiber Optics and Photonics - Kerala, India Duration: 8 Dec 2004 → 11 Dec 2004 |
Conference
| Conference | 7th International Conference on Optoelectronics, Fiber Optics and Photonics |
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| Abbreviated title | Photonics 2004 |
| Country | India |
| City | Kerala |
| Period | 8/12/04 → 11/12/04 |
Keywords
- fiber ring laser
- fiber amplifiers
- intra-cavity absorption
- spontaneous emission
- relaxation oscillations
- experimental
- theoretical investigation
- dynamics
- transient analysis