16 research outputs found
Phase insensitive and sensitive optical parametric amplification in III-V semiconductor photonic crystal waveguides
On-chip, phase sensitive amplification is a key feature in coherent optical communications.
An exact formula for calculating the phase sensitive gain of III-V semiconductor, photonic crystal waveguides, operated in the slow mode regime, is derived
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
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