Open AccessPulse-amplitude equalization in a rational harmonic mode-locked semiconductor fiber ring laser using a dual-drive Mach-Zehnder modulator
Author(s) -
Yun Jong Kim,
Chung Ghiu Lee,
Young Yun Chun,
ChangSoo Park
Publication year - 2004
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/opex.12.000907
Subject(s) - optics , harmonic , pulse (music) , pulse amplitude modulation , pulse wave , amplitude , mode locking , materials science , electro optic modulator , transmission (telecommunications) , physics , laser , optical modulator , phase modulation , telecommunications , acoustics , phase noise , computer science , detector
We present and demonstrate a simple method of pulse-amplitude equalization in a rational harmonic mode-locked semiconductor ring laser, using a dual-drive Mach-Zehnder (MZ) modulator. Pulse-amplitude equalization was achieved by adjusting the voltages applied to both arms of the modulator, such that each mode-locked pulse experiences the same transmission coefficient in the transmission curve of the modulator. With this method, amplitude-equalized pulse trains with repetition rates of ~7.41GHz (third rational harmonic) and ~12.34GHz (fifth rational harmonic) were successfully obtained without any additional function to the ring laser itself.