Ultrafast pulse compression by semiconductor two-photon gain.
We demonstrate experimentally the compression of femtosecond-scale pulses by two-photon gain in a compact electrically driven AlGaAs waveguide. Dynamic control of the pulse width from 240 to 140 fs is achieved by varying the current injection levels--in good agreement with the calculations. The pulse width is measured by a high-sensitivity intensity autocorrelator based on two-photon absorption in a GaAs photomultiplier tube.
Department of Electrical Engineering, Technion, Haifa 32000, Israel. nevet@tx.technion.ac.il
Amir
A
Nevet
Alex
A
Hayat
Meir
M
Orenstein