Abstract

What we believe to be a new and simple approach was developed for stabilizing a harmonic mode-locked fiber laser at $40\text{\hspace{0.17em} GHz}$. It uses a computer to tune the modulation frequency in a $100\text{\hspace{0.17em} kHz}$ band near $40\text{\hspace{0.17em} GHz}$ to follow variations in the length of the optical cavity. A second approach was also developed to compare with the new approach and to draw conclusions on its performance. Results for the pulse characteristics, side-mode suppression ratio, and timing jitter show that both approaches provide an efficient way of stabilizing a harmonic FM mode-locked fiber laser.

© 2006 Optical Society of America

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