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First demonstration of two photon absorption in a semiconductor waveguide pumped by a diode laser

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5 Author(s)

For the first time, lasers have been used to induce a fast all-optical nonresonant nonlinearity at wavelengths well beyond the band edge in a GaAs/GaAlAs multiquantum well waveguide. Using a Q-switched diode laser, which gave optical pulses of 3.5 ps duration and 7 W peak power, an intensity-dependent transmission was recorded that was consistent with the presence of two photon absorption in the waveguide. The measured two photon absorption coefficient was 11+or-2 cm/GW.

Published in:

Electronics Letters  (Volume:29 ,  Issue: 18 )

Date of Publication:

2 Sept. 1993

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