Narrow band optical parametric amplification in engineered photonic crystal waveguides: using cw and pulsed pump

Parametric gain properties in dispersion engineered photonic crystal waveguides are studied for continuous wave and pulsed pump. Narrowband optical parametric amplification has been achieved with careful consideration of the effects of structural details and of losses

Parametric gain in dispersion engineered photonic crystal waveguides

We present a numerical simulation of parametric gain properties in GaInP PhC dispersion engineered waveguides in which the group velocity dispersion crosses zero twice and where the pump and the signal are 100ps pulses. The simulations use the M-SSFT algorithm which incorporates dispersive nonlinear coefficients and losses. We concentrate on narrow band parametric gain which occurs for pump wavelengths in the normal group velocity dispersion regime. The effects of structural details, of pump wavelength and of losses are carefully analyzed

Dual-pump parametric amplification in dispersion engineered photonic crystal waveguides

This paper describes a numerical simulation of narrow band parametric amplification in dispersion engineered photonic crystal waveguides. The waveguides we analyze exhibit group velocity dispersion functions which cross zero twice thereby enabling many interesting pumping schemes. We analyze the case of two pulsed pumps each placed near one of the zero dispersion wavelengths. These configurations are compared to conventional single pump schemes. The two pumps may induce phase matching conditions in the same spectral location enabling to control the gain spectrum. This is used to study the gain and fidelity of 40Gbps NRZ data signals

Temperature stability of static and dynamic properties of 1.55 μm quantum dot lasers

Gefördert durch den Publikationsfonds der Universität Kasse

Highly efficient four wave mixing in GaInP photonic crystal waveguides

We report highly efficient four wave mixing in a GaInP photonic crystal waveguide. Owing to its large bandgap, the ultrafast Kerr nonlinearity of GaInP is not diminished by two photon absorption and related carrier effects for photons in the 1550 nm range. A four-wave-mixing efficiency of -49 dB was demonstrated for cw pump and probe signals in the milliwatt range, while for pulsed pumps with a peak power of 25 mW the conversion efficiency increased to -36 dB. Measured conversion efficiency dependencies on pump probe detuning and on pump power are in excellent agreement with a simple analytical model from which the nonlinear parameter gamma is extracted. gamma scales approximately with the square of the slow down factor and varies from 800 W(-1)m(-1) at a pump wavelength lambda(p) = 1532 nm to 2900 W(-1)m(-1) at lambda(p)=1550 nm. These values are consistent with those obtained from self phase modulation experiments in similar devices

The role of slow wave propagation in nonlinear photonic crystal waveguides

The role of slow wave propagation in nonlinear photonic crystal waveguides is presented. Large enhancement of nonlinear parametric amplification is observed in low loss, low dispersion waveguides