In this paper, the analytical solution of an electric and Volterra edge dislocation in a functionally graded piezoelectric (FGP) medium is obtained by means of complex Fourier transform. The system is subjected to in-plane mechanical and electrical loading. The material properties of the medium vary exponentially with coordinating parallel to the crack. In this study, the rate of the gradual ch...

We study the transversemode selection of aweakly index-guided vertical-cavity surface-emitting laser (VCSEL), based on an extension of the model of Valle et al. [Opt. Commun. 115 (1995) 297]. In the model we incorporate carrier capture and escape processes between the separate confinement heterostructure (SCH) layer and the quantum well (QW) active region of a VCSEL. These effects are character...

We discuss the polarization-resolved intensity noise characteristics of a transverse single-mode vertical-cavity surface-emitting laser (VCSEL). Measurements by a sensitivity-enhanced lock-in amplifier detection scheme yield only an imperfect anticorrelation between the strong and the weak orthogonally polarized fundamental modes. Yet the total emission shows amplitude squeezing of 0.4 dB below...

Hyper-Rayleigh scattering (HRS) from liquid nitrobenzene-benzene solutions with nitrobenzene mole fraction in the range 0.001 < x(NB) < 1 was measured for several combinations of linear polarized incident and scattered light, for scattering angles near 90°. Polar collective modes are identified by their distinctive HRS polarization dependence. At all concentrations the nitrobenzene HRS intensit...

Cylindrical vector beams (CVBs) are the product of polarization modulation optical fields, and possess both unique focusing characteristics excellent properties applicable to machining, imaging, communication other fields. Mode selection couplers comprise a promising new method realize long-term stable output cylindrical beam all-fiber lasers. have advantages simple structure, high mode convers...

We investigate the modal losses and field distributions of different order transverse modes supported by the photonic crystal Bragg structure using a transfer matrix method. We find that only the fundamental transverse mode has a single-lobed near field and far field and there exists a trade-off between ensuring lasing in the fundamental transverse mode and reducing the threshold. Employing the...

We present a numerical study of the effects of optical feedback on the static and dynamic characteristics of verticalcavity surface-emitting lasers (VCSEL’s) under both single-mode and two-mode operations. Our model includes transverse effects such as carrier diffusion and spatial hole burning (SHB) and is therefore capable of including gain-saturation-induced coupling among transverse modes. F...

The synchronization of unidirectionally coupled multi-transverse-mode vertical-cavity surface-emitting lasers (VCSELs) is numerically studied. It is demonstrated that synchronization can be achieved between each transverse mode of a master laser and its counterpart, a slave laser. This result opens the opportunity for multichannel chaotic communications by use of multi-transverse-mode VCSELs. I...