14 research outputs found
Efficient InGaAsP/InP multiple quantum well optical phase modulator for the 1.5-1.55μm fiber band
We report an InGaAsP/InP MQW phase modulator operating over the entire 1.55μm fiber band with high phase modulation efficiency and low loss modulation. The spectral dependence of the electro-refraction in a MQW structure is measured for the first time
A New Concept of Multiplexed Optical Transmission Readout Scheme for a Silicon Strip Detector
Two-photon absorption and self-phase modulation in InGaAsP/InP multi-quantum-well waveguides
We report the first measurement of two-photon absorption (TPA) and self-phase modulation in an InGaAsP/InP multi-quantum-well waveguide. The TPA coefficient, β2, was found to be 60±10 cm/GW at 1.55 μm. Despite operating at 200 nm from the band edge, self-phase modulation as high as 8±2 rad was observed for 30-ps optical pulses at 3.8-W peak input power. A theoretical calculation indicates that this enhanced phase modulation is primarily due to bandfilling in the quantum wells and the free-carrier plasma effect