Booster SOA Light Source for Raman Pump RIN and Ripple Suppression

The pumping light source is segmented into multiple independent laser sources operating at different wavelengths. Each laser source contributes to the total amplification gain while having its own independent noise characteristics. By distributing the pumping power across multiple sources, the RIN transfer to signal light is reduced compared to using a single high-power source, as the noise from individual lower-power sources is less detrimental.

The invention changes the parameter of the pumping light source from a single wavelength to multiple wavelengths. This wavelength diversification allows the system to achieve the required total pumping power for sufficient Raman amplification gain while each individual wavelength component operates at a lower power level, thereby reducing the RIN transfer effect to the signal light.

The single high-power Fabry-Perot laser is segmented into multiple lower-power laser sources operating at different wavelengths. This segmentation eliminates the end-facet reflection ripple problem that occurs in single high-power FP lasers, as each individual lower-power source produces minimal ripple. The combined output of multiple sources achieves the required total power without the harmful ripple effects.

Multiple laser sources operating at different wavelengths are merged together to provide the total pumping power required for Raman amplification. By combining these multiple sources, the system achieves high output power equivalent to a single high-power FP laser while avoiding the ripple generation problem, since each individual source in the merged system operates at a lower power level where ripple is negligible.