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Enhancement of third-order nonlinear optical susceptibilities in compressively strained quantum wells under the population inversion condition

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3 Author(s)
Kuwatsuka, H. ; Fujitsu Labs. Ltd., Atsugi, Japan ; Simoyama, T. ; Ishikawa, H.

Third-order optical nonlinear susceptibilities χ(3) in compressively strained and nonstrained InGaAs-InGaAsP quantum wells (QW's) under the population inversion condition are discussed. The small effective mass of compressively strained QW's increases the contribution of the carrier density pulsation effect and the carrier heating effect of χ(3). The hole burning effect is also increased due to the decrease of the carrier-carrier scattering rate. The calculation including these effects shows an enhancement of factor 3 due to 0.8% compressive strain. The values of χ(3) are experimentally estimated from the data of nondegenerate four-wave mixing in λ/4-shifted distributed feedback lasers. χ(3) in 0.8% compressively strained QW's is three times larger than that in nonstrained QW's with the same linear gain

Published in:

Quantum Electronics, IEEE Journal of  (Volume:35 ,  Issue: 12 )