It is based on two double-clad fibers fusion technology:
- One fiber propagates the signal from a seeder
- One fiber bring power from high power pump diode
The powered fiber carries pump diode beam at typically 980nm and discharges the energy into the cladding. The signal fiber delivers a beam from a weak power laser source directly into the doped core. Thus the gain media is directly stimulated with no loss.
This technology allows LEA Photonics to control the polarization extinction ratio (PER). Thus we can guarantee a PER up to 25dB.