Numerical analysis of pulse amplitude in harmonic mode locked ring fiber laser

ZHANG Jing; CAO Zhi-gang; XU Feng; YE Yong; ZHANG Rui-jue; WANG Bao-san; YU Ben-li

LASER TECHNOLOGY > 2009 > 33(2): 169-171,190.

ZHANG Jing, CAO Zhi-gang, XU Feng, YE Yong, ZHANG Rui-jue, WANG Bao-san, YU Ben-li. Numerical analysis of pulse amplitude in harmonic mode locked ring fiber laser[J]. LASER TECHNOLOGY, 2009, 33(2): 169-171,190.

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Numerical analysis of pulse amplitude in harmonic mode locked ring fiber laser

Key Laboratory of Opto-Electronic Information Acquisition and Manipulation of Ministry of Education, Anhui University, Hefei 230039, China

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Received Date: January 06, 2008
Revised Date: February 18, 2008
Published Date: April 24, 2009

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The modulating characteristics of Mach-Zehnder modulator and pulse-amplitude equalization condition were demonstrated in detail.By adjusting the direct-current bias voltage and modulation depth,the shape of transmission curve can be controlled.Mode locking pulse train and the modulator transmission curve were numerically studied in time domain at 5GHz of modulation frequency.The pulse train and modulation curves for mode-locking pulse in the second to seventh order were simulated and analyzed with MATLAB software.The numerical result shows that: equalization of pulse-amplitude occurs only when the transmission coefficient in the modulator is uniform; amplitude-equalized pulses can be obtained both in the linear region and the nonlinear region; when the rational harmonic mode-locking order p is larger than 4, the value of modulation depth affects the pulse-amplitude equalization severely.The figure in the paper is laconic and the result is helpful to get amplitude equalized mode-locked pulses in experiments.
- lasers,
- rational harmonic mode-locked,
- transmission curve,
- pulse-amplitude equalization

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