1. Glass fiber manufacturing cost is low, the technology is mature and the fiber can bring the miniaturization, the advantages of intensive;
2. Glass fiber on the incident pump light does not need as strict as the crystal phase matching, which is due to the glass matrix Stark split caused by non-uniform broadening of the absorption band caused by a wide reason;
3. Glass material has a very low volume area ratio, heat dissipation fast, low loss, so the conversion efficiency is higher, the laser threshold is low;
4. Output laser wavelength: This is because the rare earth ion energy level is very rich and its rare earth ions as many;
5. Tunable: due to rare earth ion level and glass fiber fiber spectrum is wide.
