All-Optical Switching With GaAlAs Waveguides Via The Novel Photo-Induced Franz-Keldysh Effect

Henning Fouckhardt; Karl Joachim Ebeling

doi:10.1117/12.941204

22 September 1987 All-Optical Switching With GaAlAs Waveguides Via The Novel Photo-Induced Franz-Keldysh Effect

Henning Fouckhardt, Karl Joachim Ebeling

Proceedings Volume 0800, Novel Optoelectronic Devices; (1987) https://doi.org/10.1117/12.941204
Event: Fourth International Symposium on Optical and Optoelectronic Applied Sciences and Engineering, 1987, The Hague, Netherlands

Abstract

Intensity transmission of GaAlAs strip waveguides embedded in unbiased pn-junctions shows a strong nonlinearity at submilliwatt power levels due to the so-called photo-induced Franz-Keldysh effect. It represents a combination of two well-known effects : the photo-voltaic effect in semiconductor pn-junctions and the common Franz-Keldysh effect. The nonlinearity is typical for bleachable absorption. First-order theory and experiment show good agreement. The effect is used for all-optical switching. The transmitted light power of a probe beam is switched by about 3 dB due to the influence of a control beam at input light power levels of about 0.5 mW each. The switching dynamics is limited by RC time constants.

Citation Download Citation

Henning Fouckhardt and Karl Joachim Ebeling "All-Optical Switching With GaAlAs Waveguides Via The Novel Photo-Induced Franz-Keldysh Effect", Proc. SPIE 0800, Novel Optoelectronic Devices, (22 September 1987); https://doi.org/10.1117/12.941204

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