By Govind Agrawal
This moment version may be an account of nonlinear optical phenomena in fiber optics. It synthesizes learn fabric. specific consciousness is paid to the significance of nonlinear results within the layout of optical fiber verbal exchange structures.
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Additional info for Applications of Nonlinear Fiber Optics
16. Detuning is so large and β g2 is so small for the leftmost trace that the pulse acquires some chirping through SPM but its shape remains nearly unchanged. This feature can also be understood from Eq. 9), where the soliton period becomes so long as v 1 that nothing much happens to the pulse over a few-cm-long grating. As δ is reduced, the pulse narrows down considerably. A reduction in pulse width by a factor of 3 occurs for δ 1053 m 1 in Fig. 16. This pulse narrowing is an indication that a Bragg soliton is beginning to form.
This can be achieved by tuning both polarization components inside the stop band but close to the upper branch of the dispersion curve. Their combined intensity can increase the refractive index (through a combination of SPM and XPM) enough that both components are transmitted. However, if one of the components is absent at the input (0 bit), the XPM contribution vanishes and both components are reflected by the grating. This occurs simply because the coupled gap soliton forms at a lower peak power level than the Bragg soliton associated with each individual component .
The speed of light is reduced considerably as the CW-beam frequency approaches an edge of the stop band. As an example, it reduces by 50% when f 2 equals 1/3 or 3. 5) can be used to find how the dispersion curves are affected by the fiber nonlinearity. 11 shows such curves at two power levels. The nonlinear effects change the upper branch of the dispersion curve qualitatively, leading to the formation a loop beyond a critical power level. This 25 CW Nonlinear Effects critical value of P0 can be found by looking for the value of f at which q be1.