Highly linear and efficient phase modulators based on GaInAsP-InP three-step quantum wells

Mohseni, H.; An, H.; Shellenbarger, Z. A.; Kwakernaak, M. H.; Abeles, J. H.
January 2005
Applied Physics Letters;1/17/2005, Vol. 86 Issue 3, p031103
Academic Journal
Highly linear and efficient phase modulators based on three-step quantum wells are reported. The spatial separation of electron and hole wave functions in the three-step quantum well leads to enhancement of the linear electro-optic component. In parallel, the quadratic electro-optic component is suppressed using a method based on tailored doping profile. Measured modulation efficiency is 48°/mm V, and the ratio of linear to quadratic components of the phase modulation is 640 at λ=1560 nm. The efficiency is similar to the best reported values for semiconductor modulators at this wavelength, while the linearity is more than one order of magnitude higher.


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