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AssigneeFujitsu Limited
InventorsRainer Hainberger, Shigeki Watanabe
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Since the magnitude of a nonlinear effect depends on the nonlinearity coefficient of the microstructured fiber and the intensity of pump light, either the nonlinearity coefficient or the intensity of pump light are adjusted. The nonlinearity coefficient is modified by introducing a nonlinear refractive index profile that has the inverse characteristic of the intensity distribution of either the pump or the signal light. The intensity of the pump light is adjusted by an optical amplifier, an optical attenuator, or a pre-emphasizing filter under the control of a control unit. The control unit controls the intensity of the pump light based on a look-up table which is prepared in advance by experiment or calculation, or based on a function of the pump and signal wavelength.
A microstructured optical fiber which has a nonlinear refractive index profile proportional to a light intensity in which the nonlinear refractive index of a core increases in an outward radial direction from the center of the core, the nonlinear refractive index profile having a shape of an inverse of intensity distribution of a pump light or a signal light in cross section.
An optical signal processing device, comprising:
An optical signal processing device, comprising:
Dependencies are inferred from the claim text.