## Second harmonic generation under phase-mismatched conditions

Second harmonic generation is an important effect of nonlinear optics. It is well discussed for cw processes, so in this project we want to show it´s properties for ultrashort pulses through the use of the simulation software...[more]

[more]Second harmonic generation is an important effect of nonlinear optics. It is well discussed for cw processes, so in this project we want to show it´s properties for ultrashort pulses through the use of the simulation software VirtualLab Fusion \cite{vlfusion}. The fundamental principles are explained in my previous report 'Second harmonic generation under phase-matching conditions'. In this report we discuss the physical effects when phase-matching conditions are not met.

Citation: D.KÜHN, F.WYROWSKI, "Second harmonic generation under phase-mismatched conditions", www.applied-computational-optics.org, 22.01.2016

## Second harmonic generation for ultrashort pulses in phase-matching conditions

It is well discussed for cw processes, and in this project we want to show it´s properties for ultrashort pulses by using the simulation software VirtualLab Fusion. Citation: D. KÜHN, F. WYROWSKI, "Second harmonic...[more]

[more]It is well discussed for cw processes, and in this project we want to show it´s properties for ultrashort pulses by using the simulation software VirtualLab Fusion.

Citation: D. KÜHN, F. WYROWSKI, "Second harmonic generation for ultrashort pulses in phase-matching conditions", www.applied-computational-optics.org, 08.12.2015

## Polarization crosstalk due to refraction at a plane interface

In this paper we explain the reason why polarization crosstalk appears when light is refracted at a plane interface. Citation: S. ZHANG, and F. WYROWSKI, "Polarization crosstalk due to refraction at a plane...[more]

[more]In this paper we explain the reason why polarization crosstalk appears when light is refracted at a plane interface.

Citation: S. ZHANG, and F. WYROWSKI, "Polarization crosstalk due to refraction at a plane interface", www.applied-computational-optics.org, 17.11.2015

## Ray tracing in graded-index medium

Ray path in graded-index medium is curved and can be solved numerically by using eikonal equation, which is the starting point of geometrical optics. In this report, derivation of eikonal equation, the relation between eikonal...[more]

[more]Ray path in graded-index medium is curved and can be solved numerically by using eikonal equation, which is the starting point of geometrical optics. In this report, derivation of eikonal equation, the relation between eikonal equation and Fermat¡¯s principle is shown. Moreover, general ray equation for graded-index medium is derived from eikonal equation. Then, ray path can be realized more efficiently and accurately by solving the ray equation with Runge-Kutta method.

Citation: H. ZHONG, S. ZHANG, and F. WYROWSKI, "Ray tracing in graded-index medium", www.applied-computational-optics.org, 25.10.2015

## Geometric field tracing through GRIN media and fibers (II)

The damping of the media, which is represented by the imaginary part of complex refractive index, affects the electromagnetic field when it travels along the ray path. In previous research, the effect is not explicitly discussed...[more]

[more]The damping of the media, which is represented by the imaginary part of complex refractive index, affects the electromagnetic field when it travels along the ray path. In previous research, the effect is not explicitly discussed or even neglected. In this report, we propose the mathematical solusion of equation of ray path and normlized field in GRIN media with damping.

Citation: ZHONG, H., ZHANG, S. and WYROWSKI, F., "Geometric field tracing through GRIN media and fibers (II)", www.applied-computational-optics.org, 21.10.2015