Characteristics of cavity solitons and drifting excitations in broad-area vertical-cavity surface-emitting lasers with frequency-selective feedback

Abstract

The properties of cavity solitons in a vertical-cavity surface-emitting laser with frequency-selective feedback from a diffraction grating are characterized and analyzed. The solitons have a typical width of 10 m and a linewidth of down to 10 MHz, i.e., they represent small microlasers. Their equilibrium spatial location arises from an interplay of spatial inhomogeneities in the device and a grating-induced force which depends on detuning. Transients involve the passage through a self-pulsing state. Due to the grating-induced advection, drifting excitations are found, which might have applications in all-optical delay lines though their solitonic nature remains to be established. (Taken from : http://pra.aps.org/pdf/PRA/v78/i2/e023810

From one- to two-dimensional solitons in the Ginzburg-Landau model of lasers with frequency-selective feedback

“…This system has been a topic of interest during the last years since it can display a variety of localized structures on top of a non-lasing background [15][16][17][18][19]. In this system, the (complex) intra-VCSEL field features nonlinear spatiotemporal dynamics due to two-way coupling between the optical field and the inversion of the electronic population (driven by the injection current), while the feedback field obeys a linear equation which is linearly coupled to the main equation for the intra-VCSEL field.…”

Cavity Solitons in VCSEL Devices

“…The writing beam that provides a temporary and localized excitation is not coherent with the spots. Further details on the different switching techniques are described in [81], and a model that qualitatively agrees very well with the observations is proposed in [82]. Interestingly, the switch-on and off are obtained with an incoherent beam and the function (writing or erasure) is controlled by the position of the localized excitation with respect to CSL location.…”

Spontaneous motion of localized structures and localized patterns induced by delayed feedback

“…So far, however, the inclusion of the delayed feedback in the dynamics of spatially extended systems is a relatively new area of research [55,56]. Recently, a model for the study of cavity solitons in broad area vertical-cavity surface-emitting lasers subjected to a frequency-selective feedback was proposed in [57,58]. Other studies of various spatially extended systems with time delay have motivated further to investigate this subject [59][60][61][62].…”