Patent ID: 9577401
Date: 2017-02-21
CPC Classifications: G02B,H01S

Claim:
1. A system of fiber optic amplification in a spectrum of electromagnetic radiation, the system comprising: a chalcogenide photonic crystal fiber having a glass core surrounded by a plurality of air holes, wherein the glass core has a distance forming a pitch between each air hole in the plurality of air holes, wherein the pitch is a radially varying pitch, and wherein each air hole in the plurality of air holes has a hole size; a first pump laser coupled to the glass core of the chalcogenide photonic crystal fiber by a first coupler; wherein the first pump laser emits a first electromagnetic radiation wave at a first oscillation frequency and a second electromagnetic radiation wave at a second oscillation frequency, and wherein the first oscillation frequency of the first electromagnetic radiation wave equals the second oscillation frequency of the second oscillation wave, and a signal laser coupled to the glass core of the chalcogenide photonic crystal fiber by a second coupler, wherein the signal laser emits a third electromagnetic radiation wave having a third oscillation frequency, which is launched into the glass core of the chalcogenide photonic crystal fiber through the second coupler, wherein the third electromagnetic radiation wave interacts with the first electromagnetic radiation wave and the second electromagnetic radiation wave in the chalcogenide photonic crystal fiber, and wherein the first electromagnetic radiation wave and the second electromagnetic radiation wave interacting in the chalcogenide photonic crystal fiber cause parametric amplification of the third electromagnetic radiation wave and cause a fourth electromagnetic radiation idler wave to be generated, wherein dispersion causes a first wavelength of the first electromagnetic radiation wave of the first pump laser, a second wavelength of the second electromagnetic radiation wave, a third wavelength of the third electromagnetic radiation wave from the signal laser and a fourth wavelength of the fourth electromagnetic radiation wave to all be phase matched, wherein parametric amplification is achieved by four wave mixing, and wherein generation of the fourth electromagnetic radiation idler wave is based on nonlinearities in a transmission medium and is related to frequencies of the first, second, third, and fourth electromagnetic radiation waves according to a relationship expressed as: where ω where ω where ω where ω