Gain saturation in gain-guided slab waveguides with large-index antiguiding

Gain saturation in gain-guided slab waveguides with large-index antiguiding.

We investigate numerically and analytically the effects of gain saturation on the propagation of the fundamental mode in a gain-guided index-antiguided slab waveguide. The propagating mode adapts to gain saturation by becoming less confined, while at the same time its peak intensity increases more slowly. At steady state, both the mode shape and the power remain constant.

Nonlinear Gain Saturation in Active Slow Light Photonic Crystal Waveguides

Gain-guided, index-antiguided fiber lasers

ecent experimental results [1,2] suggest that optical fiers having a negative index step from cladding to core, ombined with an adequately large gain coefficient in a arge-diameter core region, can provide robust single ransverse mode operation having very large mode area ithout requiring complex fiber structures or other mode iscrimination measures. This paper reviews the imporant mode propert...

First-principle derivation of gain in high-index-contrast waveguides.

From first principles we develop figures of merit to determine the gain experienced by the guided mode and the lasing threshold for devices based on high-index-contrast waveguides. We show that as opposed to low-index-contrast systems, this quantity is not equivalent to the power confinement since in high-index-contrast structures the electric and magnetic field distributions cannot be related ...

Lasing in a gain-guided index antiguided fiber

fiber with a cladding index of refraction larger than that f the core is an index antiguiding (IAG) fiber. In such a ber total internal reflection at the core–cladding interace does not take place. Light generated in the core of the ber can leak out into the cladding of an IAG fiber, though t experiences some guiding by grazing angle reflection. here is some loss on each reflection, but if ther...