Abstract

In recent years, generation of femtosecond light pulse from colliding pulses mode-locked (CPM) ring dye laser (1) has led to pulses shorter than 0.1 ps. To explain the formation of these pulses, recent theories (2) introduce both self phase modulation (SPM) and group velocity dispersion (GVD) in the equations describing the pulse evolution during a single cavity round trip. The mathematical form of these equations has led to consider "soliton-type shaping mechanism "but to our knowledge no experimental proof of the soliton character of the pulse has been found.

© 1986 Optical Society of America