Study of a Hybrid Mode-locked Er-doped Fiber Laser with Doubled Repetition Rate and Tunable Alternating Pulse Amplitude/Width
碩士 === 國立交通大學 === 光電工程研究所 === 107 === In a hybrid harmonic mode-locked Er-doped fiber laser by using 10 GHz active phase modulation and passive nonlinear polarization rotation (NPR) effects, we discover a new interesting mode-locking state with a 20 GHz doubled pulse repetition rate and the alternat...
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| Format: | Others |
| Language: | en_US |
| Published: |
2019
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| Online Access: | http://ndltd.ncl.edu.tw/handle/94rr9w |
| Summary: | 碩士 === 國立交通大學 === 光電工程研究所 === 107 === In a hybrid harmonic mode-locked Er-doped fiber laser by using 10 GHz active phase modulation and passive nonlinear polarization rotation (NPR) effects, we discover a new interesting mode-locking state with a 20 GHz doubled pulse
repetition rate and the alternating pulse amplitude/width output. Experimentally we can tune the modulation frequency, modulation depth and polarization controllers to adjust the relative amplitudes between the adjacent two pulses or to tune the laser back to the 10 GHz mode-locking state. Theoretically we have used the master equation model to simulate the overall field evolution behavior during time evolution and estimate the laser output when the steady state is reached. Nice agreement between the theoretical and experimental results is achieved.
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