Abstract
A fiber ring laser with a semiconductor optical amplifier (SOA) as active component is investigated using a hybrid model. The SOA is studied using a newly-established 4th-order time-domain algorithm, which includes the nonlinear effects of carrier depletion and recovery, as well as gain dispersion. Comparison with existing analytical results shows that this algorithm can attain a relative precision of a few parts per thousand (∼10-3) or better, which is essential for predicting waveform of optical pulse. The transmission in other parts of the ring laser is carried out in frequency domain. Our model predicts a pulse width of ∼10ps with a 10GHz external modulation, and reveals higher stability, better waveform, as well as easier locking conditions with dispersion-compensating fiber (DCF). A diffraction-limited Gaussian pulse train can be obtained, with its carrier frequency effectively red-shifted due to band-pass filter. All these are in good agreement with our experimental observations.
| Original language | English |
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| Title of host publication | Proceedings of the 2012 8th International Symposium on Communication Systems, Networks and Digital Signal Processing, CSNDSP 2012 |
| DOIs | |
| Publication status | Published - 12 Nov 2012 |
| Event | 2012 8th International Symposium on Communication Systems, Networks and Digital Signal Processing, CSNDSP 2012 - Poznan, Poland Duration: 18 Jul 2012 → 20 Jul 2012 |
Conference
| Conference | 2012 8th International Symposium on Communication Systems, Networks and Digital Signal Processing, CSNDSP 2012 |
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| Country/Territory | Poland |
| City | Poznan |
| Period | 18/07/12 → 20/07/12 |
Keywords
- Electromagnetic propagation in dispersive medium
- mode-locked laser
- numerical simulations
- optical pulses
ASJC Scopus subject areas
- Computer Networks and Communications
- Signal Processing