TY - JOUR

T1 - Nonlinear carrier dynamics in a quantum dash optical amplifier

A1 - Hansen,Per Lunnemann

A1 - Ek,Sara

A1 - Yvind,Kresten

A1 - Piron,Rozenn

A1 - Mørk,Jesper

AU - Hansen,Per Lunnemann

AU - Ek,Sara

AU - Yvind,Kresten

AU - Piron,Rozenn

AU - Mørk,Jesper

PB - Institute of Physics Publishing

PY - 2012

Y1 - 2012

N2 - Results of experimental pump-probe spectroscopy of a quantum dash optical amplifier biased at transparency are presented. Using strong pump pulses we observe a competition between free carrier absorption and two-photon induced stimulated emission that can have drastic effects on the transmission dynamics. Thus, both enhancement as well as suppression of the transmission can be observed even when the amplifier is biased at transparency. A simple theoretical model taking into account two-photon absorption and free carrier absorption is presented that shows good agreement with the measurements.

AB - Results of experimental pump-probe spectroscopy of a quantum dash optical amplifier biased at transparency are presented. Using strong pump pulses we observe a competition between free carrier absorption and two-photon induced stimulated emission that can have drastic effects on the transmission dynamics. Thus, both enhancement as well as suppression of the transmission can be observed even when the amplifier is biased at transparency. A simple theoretical model taking into account two-photon absorption and free carrier absorption is presented that shows good agreement with the measurements.

UR - http://arxiv.org/abs/1111.2757

U2 - 10.1088/1367-2630/14/1/013042

DO - 10.1088/1367-2630/14/1/013042

JO - New Journal of Physics

JF - New Journal of Physics

SN - 1367-2630

IS - 1

VL - 14

SP - 013042

ER -