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Pulse-amplitude equalization in a rational harmonic mode-locked fiber laser using nonlinear modulation

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6 Author(s)
Xinhuan Feng ; Inst. of Modern Opt., Nankai Univ., Tianjin, China ; Yange Liu ; Shuzhong Yuan ; Kai, G.
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In this letter, a simple technique for the pulse-amplitude equalization of high repetition rate pulses generated from a rational harmonic mode-locked fiber ring laser was demonstrated. The principle is based on nonlinear modulation of the modulator and a theoretical explanation based on time-domain analysis was given. Amplitude equalized short pulses up to the seventh rational harmonic mode-locking were obtained with an optimum bias level and modulation depth of the modulator, which agrees well with the simulation result and demonstrates the efficiency of this method.

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Photonics Technology Letters, IEEE  (Volume:16 ,  Issue: 8 )