China's Top 10 Optical Breakthroughs:Nd-Doped Laser Fibers of 900 nm Band(Invited)
Lasers of～900 nm band can be used for pumping Yb3+-doped laser materials and atmospheric sensing.Moreover,the frequency doubling of ∼ 900 nm lasers leads to deep-blue lasers of～450 nm,which are crucial for underwater communication,biomedical applications,and laser processing.Because of their good integrability,tunability,and high beam quality,～900 nm lasers based on Nd3+-doped silica fibers have attracted increasing research attention.However,overcoming the competition from the～1060 nm transition of Nd3+is necessary to realize～900 nm fiber lasers.In this study,we review common techniques for suppressing the～1060 nm parasitic oscillation in～900 nm fiber lasers by focusing on an active enhancement scheme for～900 nm emission we proposed previously.Using this scheme,the obtained～900 nm emission intensity of Nd3+-doped silica fibers is higher than its～1060 nm intensity.A 113.5 W high-power laser output at 927 nm,high-frequency ultrashort pulsed laser at 920 nm,single-frequency lasers at 890 nm and 910 nm,and picosecond pulsed laser at 920 nm with an average power of 10 W class have been achieved in all-fiber structures using self-developed Nd3+-doped silica fibers.This result will lay the foundation for the application of an all-fiber laser at～900 nm.
NETL
NSTL
万方数据
