We have designed a high nolinear photonic crystal fiber by considering nonlinear coefficient,
chromatic dispersion and confinement loss. The detail of the design process is presented in this paper.
According the simulation results, we have fabricated a kind of highly nonlinear photonic crystal fiber, which
is characteristics with the flatten dispersion curve at 800nm wave band and negative dispersion at wavelength
of 805nm (about -40ps/nm/km). In this kind of PCF we design the zero dispersion around 800nm. With the
fabricated fiber, we demonstrate that supercontinuum emission with spectrum stretching over 900nm is
obtained by injecting Ti: sapphire laser pulses.
Anti-resonant reflecting photonic crystal structure is employed in vertical cavity surface emitting lasers (VCSELs) to achieve photon confinement in lateral direction. Such a design is promising in supporting large aperture single-mode emission. In the configuration, a hexagonal array of high-index cylinders which run vertically in the cladding region are introduced in the top of the VCSEL p-type DBR mirror region. The transverse modal property of the proposed structure, especially leakage loss, has been investigated. An optimum design for the minimum radiation loss while maintaining single-mode operation has been discussed in this paper.
We develop a complete two-dimension transmission line laser model (TLLM) to analyze the proposed twodimension vertical cavity surface emission laser (VCSEL) based wavelength converter. Modified connecting matrices are used to model the Bragg reflectors. The longitudinal variations of carrier density, photon density and the amplified spontaneous emission noise are taken into account. Therefore, extinction ratio, frequency chirping, optical pulse patterns and dynamic characteristics can be accurately estimated. In this paper, extinction ratio and frequency chirp of the output signal have been calculated for various parameters such as wavelength, input signal power, cavity diameter and facet reflectivity.
A novel dynamic transmission-line-laser-modeling-based model of the multiple phase shift distributed feedback (DFB) lasers has been proposed in this paper. The dynamic and static characteristics of three phase shift (3PS) DFB structures are analyzed based on this model. The longitudinal carrier density distribution of quarterly wavelength shifted (QWS) DFB LDs and 3PS DFB LDs are compared. Our results show that 3PS DFB structure has a more uniform longitudinal carrier density distribution; hence such a structure reduces the spatial hole burning effect and strengthens the stability of single longitudinal mode.
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