Cross-phase modulation in a semiconductor laser amplifierdetermined by a dispersive technique |
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| Authors: | Dijaili S.M. Wiesenfeld J.M. Raybon G. Burrus C.A. Jr. Dienes A. Smith J.S. Whinnery J.R. |
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| Affiliation: | Lawrence Livermore Nat. Lab., CA; |
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| Abstract: | Cross-phase modulation in a semiconductor laser diode amplifier is reported. A simple expression for the chirp imparted on a weak signal pulse by the action of a strong pump pulse is derived. A novel dispersive technique for characterizing the resulting nonlinear chirp is introduced and used in the present experiment. A maximum frequency excursion of 16 GHz, due to the cross-phase modulation, was measured. A value of 6 was found for αxpm, which is a factor for characterizing the cross-phase modulation in a similar manner to the conventional linewidth enhancement factor α |
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