Raman Fiber Amplifiers Enhance Performance of Long-Haul Optical Communication Systems

In the field of optical communications, long-distance transmission has long been challenged by issues such as signal attenuation and distortion. Raman fiber amplifiers, with their unique advantages, have become a key technology for improving the performance of long-distance optical communication systems.

Compared with traditional erbium-doped fiber amplifiers, Raman fiber amplifiers have significant advantages: they offer a larger gain bandwidth, enabling full-band amplification, which is beneficial for expanding communication bands and applying dense wavelength division multiplexing; secondly, when using multi-pump configurations, their gain spectra can overlap and compensate each other, achieving gain flatness and ensuring stable transmission; additionally, their low noise figure, good compatibility with various fiber systems, and high saturation power give them distinct advantages in long-distance optical communication systems.

Currently, Raman fiber amplifiers are widely used in ultra-long-haul fiber transmission systems such as transoceanic optical cables and long-distance terrestrial fiber backbones. In practical applications, they can either assist erbium-doped fiber amplifiers in signal amplification or be used independently, making up for the shortcomings of erbium-doped fiber amplifiers such as high cascaded noise and limited bandwidth.

Box Optronics provides first-order Raman fiber amplifiers, second-order Raman fiber amplifiers, and erbium-doped fiber amplifier/Raman amplifier hybrid integrated modules. These products can provide gain for C-band, C+L band, and 1425~1465nm, with pump powers of 300mW/500mW/1000mW/1400mW, effectively compensating for signal attenuation in long-haul fiber transmission. They are suitable for long-distance optical transmission systems and distributed fiber sensing systems.