Applications of Nonlinear Fiber Optics by Govind Agrawal

By Govind Agrawal

This moment variation can be an account of nonlinear optical phenomena in fiber optics. It synthesizes study fabric. specific recognition is paid to the significance of nonlinear results within the layout of optical fiber communique structures.

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In one experiment, 80-ps pulses were propagated through a 6-cm-long grating whose linear chirp could be varied over a considerable range through a temperature gradient established along its length [140].

5 Modulation Instability The stability issue is of paramount importance and must be addressed for the CW solutions obtained in the previous section. 1, modulation instability can destabilize the steady-state solution and produce periodic output even when a CW beam is incident on one end of the fiber grating [90]–[95]. Moreover, the repetition rate of pulse trains generated 28 Fiber Gratings through modulation instability can be tuned over a large range because of large GVD changes occurring with the detuning δ .

9 GHz). 18(a) shows a sharp rise in the transmittivity from a few percent to 40% when the peak power of input pulses increases beyond 2 kW. Physically, the nonlinear increase in the refractive index at high powers shifts the Bragg wavelength far enough that the pulse finds itself outside the stop band and switches to the upper branch of the bistability curves seen in Fig. 12. The pulse shapes seen in Fig. 18(b) show what happens to the transmitted pulse. The initial spike near t 0 in these traces is due to a sharp leading edge of the asymmetric input pulse and should be ignored.

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