Stimulated Brillouin Scattering in Optical Fibers:
estimating the Brillouin threshold
Shows how the transmitted power and power of the Stokes wave propagated in backward direction depend on the input power. If the input power is above a certain power level (the SBS threshold), the backscattered power rapidly increases. 
» Keywords: SBS, Stimulated Brillouin Scattering, Suppression, Phase Modulation
» Available in: Fiber Optics Demos, Optical System Demos
Supercontinuum Pulse Generation
Shows supercontinuum pulse generation in dispersion-decreasing fiber. 
» Keywords: Local Error Method, Supercontinuum, Dispersion-Decreasing Fiber
» Available in: Fiber Optics Demos, Optical System Demos
Noise Figure of Fiber-Optic Parametric Amplifiers
Demonstrates the Noise Figure in Phase-Insensitive vs. Phase-Sensitive FOPAs. 
» Keywords: Fiber, Phase Insensitive, HNLF, Noise Figure, Amplifier, HNL, NF, FOPA, Idler, Phase Sensitive, Highly Nonlinear Fiber, Parametric
» Available in: Fiber Optics Demos
Transmission using Nearly-Constant Signal Levels
The optimum trade-off between nonlinearities and noise figure is achieved in case of a signal power distribution along the fiber length with a minimum excursion from its input power level. This example demonstrates transmission over 80-km of fiber with a signal peak-to-peak excursion of 0.94 dB using a bi-directional second-order pumping. The second-order pumping provides gain away from the ends of the fiber, as energy first has to transfer from the 1366-nm pumps to the 1455-nm pumps before it can provide gain to the signal. Bidirectional pumping also helps maintain a constant gain along the fiber. 
» Keywords: Raman, Second-Order, Amplifier, System, Long, Pumping, High, 40, Constant Backward
» Available in: Fiber Optics Demos, Optical System Demos
Statistical Properties of the Raman Gain in Optical Fibers
for Different Values of PMD Coefficient
The Raman effect requires signals and pumps to be polarization aligned. In a standard fiber (non-polarization maintaining), alignment occurs on average over 0.5 of the fiber length. However, the alignment can be greater or less than this, depending on the actual polarization states along the fiber. For fibers with low PMD, the statistical variation could be large. This demo calculates the pdf of Raman gain for three values of fiber PMD coefficient. 
» Keywords: PMD, Raman Gain, Universal Fiber
» Available in: Fiber Optics Demos, Optical System Demos