Switch óptico basado en la dispersión Raman estimulada
The Stimulated Raman Scattering (SRS) can be expected to present advantages for optical signal processing circuits because of high amplification of the signal and the intrinsic possibility of wavelength conversion. However SRS only obtained a lot of attention in the context of Raman amplifiers [16],...
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| Tipo de recurso: | tesis doctoral |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2010 |
| País: | México |
| Institución: | Instituto Nacional de Astrofísica, Óptica y Electrónica |
| Repositorio: | Repositorio Institucional del INAOE |
| Idioma: | español |
| OAI Identifier: | oai:inaoe.repositorioinstitucional.mx:1009/505 |
| Acceso en línea: | http://inaoe.repositorioinstitucional.mx/jspui/handle/1009/505 |
| Access Level: | acceso abierto |
| Palabra clave: | info:eu-repo/classification/Interruptores ópticos/Optical switches info:eu-repo/classification/Stimulated raman/Stimulated raman info:eu-repo/classification/Dispersión/Scattering info:eu-repo/classification/Óptica no lineal/Nonlinear optics info:eu-repo/classification/cti/1 info:eu-repo/classification/cti/22 info:eu-repo/classification/cti/2209 |
| Sumario: | The Stimulated Raman Scattering (SRS) can be expected to present advantages for optical signal processing circuits because of high amplification of the signal and the intrinsic possibility of wavelength conversion. However SRS only obtained a lot of attention in the context of Raman amplifiers [16], and only a few works were published on the use of SRS for designing optical signal processing circuits and optical switching. We investigate optical switching based on stimulated Raman scattering in optical fibers. The circuit consists of two fiber stages connected in series with a spectral filter rejecting a signal inserted between them. Because of the big difference between pump and signal wavelengths the walk-off between pump and Stokes is inevitable. To avoid the degradation of the operation because of walk-off effect the dispersion management can be used connecting the fibers in which the signal travels faster than pump with the fibers in which the signal travels slower than pump. As we have seen the connection in series of fibers with normal and anomalous dispersions allows a strong improvement of the operation of the circuit. However in fibers with anomalous GVD the effect of modulation instability and pulse break-up appear at powers lower than that required for strong Raman amplification [20]. It can be expected that pulse break up will affect the depletion of the pump pulse and amplification of the Stokes pulses. When both pump and signal are launched to the input, the pump is saturated because of the signal amplification in the first stage; the amplified signal is rejected by the filter, so that only the low-power pump enters the second stage and no signal pulses appear at the output. We have built a simple configuration of the device with efficient switching and low power pump.The best achieved contrast (the ratio of energies) was 15 dB at peak pump power of 6 W. |
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