A novel mode-locking technique is presented in which the intensity-dependent spatial coupling dynamics of a waveguide array is used to achieve temporal mode-locking in a passive optical fiber laser. By use of the discrete, nearest-neighbor spatial coupling of the waveguide array, low-intensity light can be transferred to the neighboring waveguides and ejected (attenuated) from the laser cavity. In contrast, higher-intensity light is self-focused in the waveguide and remains largely unaffected. Numerical studies of this pulse-shaping mechanism (intensity discrimination) show that using current waveguide arrays and standard optical fiber technology produces stable and robust mode-locked soliton-like pulses.
© 2005 Optical Society of America
(140.4050) Lasers and laser optics : Mode-locked lasers
Joshua L. Proctor and J. Nathan Kutz, "Passive mode-locking by use of waveguide arrays," Opt. Lett. 30, 2013-2015 (2005)