公开(公告)号：US20240146014A1

公开(公告)日：2024-05-02

申请号：US18199227

申请日：2023-05-18

申请人： TIANJIN UNIVERSITY

发明人： Wei SHI ,  Chaodu SHI ,  Shijie FU ,  Xun DENG ,  Quan SHENG ,  Jianquan YAO

IPC分类号： H01S3/094 ,  H01S3/067

CPC分类号： H01S3/094007 ,  H01S3/06733 ,  H01S3/06783 ,  H01S3/094053

摘要： The present disclosure discloses a hundred-kilowatts-level monolithic fiber laser based on auxiliary lasers and hybrid cladding pumping scheme. Multi-wavelength auxiliary lasers and a signal laser are simultaneously coupled into a core of a gain fiber, and the gain fiber provides gains for the auxiliary lasers and the signal laser under multi-wavelength cladding pumping. The multi-wavelength auxiliary lasers and the signal laser are sequentially amplified under the action of gain competition, and the amplification of signal laser is suppressed at a front segment of the gain fiber, while the signal laser is effectively amplified at a rear segment of the gain fiber after the multi-wavelength auxiliary lasers are reabsorbed; quantum defects generated are reduced, and uniformly distributed thermal loads will be achieved, and the bearing capacity of laser power is improved, thereby further achieving inhibition on the transverse mode instability effect.

公开(公告)号：US20240275120A1

公开(公告)日：2024-08-15

申请号：US18197519

申请日：2023-05-15

申请人： TIANJIN UNIVERSITY

发明人： Wei SHI ,  Lu ZHANG ,  Shijie FU ,  Quan SHENG ,  Junxiang ZHANG ,  Jianquan YAO

IPC分类号： H01S3/08 ,  H01S3/067 ,  H01S3/094 ,  H01S3/16

CPC分类号： H01S3/0809 ,  H01S3/06716 ,  H01S3/06733 ,  H01S3/0675 ,  H01S3/094003 ,  H01S3/094042 ,  H01S3/094053 ,  H01S3/094096 ,  H01S3/1608 ,  H01S3/1618 ,  H01S2302/00 ,  H01S2303/00

摘要： The present disclosure discloses a 2.8 μm and 3.5 μm dual-wavelength mid-infrared fiber laser, which employs “0.98 μm+1.15 μm” pumping scheme, uses a fiber combiner to combine two pump lights into the double cladding Er-doped fluoride fiber. The Er ions in the ground state are first promoted to 4I11/2 level by the 0.98 μm pump light, realizing 2.8 μm lasing based on 4I11/2→4I13/2 transition, and further promoted to 4F9/2 level by the 1.15 μm pump light, generating 3.5 μm lasing based on 4F9/2→4I9/2 transition; followed by the 3.5 μm laser transition, the Er ions would rapidly decay to 4I11/2 level via non radiative transition, realizing the re-population of 4I11/2 level, effectively enlarge the population inversion of 2.8 μm transition, suppressing the self-termination of 2.8 μm lasing and achieving 2.8 μm and 3.5 μm dual-wavelength cascaded lasing output.