A novel coupled multi-active-region large optical cavity structure cascaded by a tunnel junction is proposed to solve the problems of facet catastrophic optical damage （COD） and the large vertical divergence caused ...A novel coupled multi-active-region large optical cavity structure cascaded by a tunnel junction is proposed to solve the problems of facet catastrophic optical damage （COD） and the large vertical divergence caused by the thin emitting area in conventional laser diodes. For a laser with three active regions, a slope efficiency as high as 1.49 W/A, a vertical divergence angle of 17.4~, and a threshold current density of 271 A/cm~ are achieved. By optimizing the structural parameters, the beam quMity is greatly improved, and the level of the COD power increases by more than two times compared with that of the conventional laser.展开更多
To achieve high optical power as well as low vertical divergence angle,a new kind of optim ized large opti- cal cavity (L OC) structure is applied to a ridge waveguide 980 nm In Ga As/ Ga As/ Al Ga As m ulti- quantum...To achieve high optical power as well as low vertical divergence angle,a new kind of optim ized large opti- cal cavity (L OC) structure is applied to a ridge waveguide 980 nm In Ga As/ Ga As/ Al Ga As m ulti- quantum well laser.The optical power density in the waveguide is successfully reduced.The maxim um output power is more than 40 0 m W with a slope efficiency of 0 .89W/ A and the far- field vertical divergence angle is lowered to 2 3°.展开更多
We studied the spectral beam combining[SBC]of a large optical cavity[LOC]laser array to achieve high-power and highbrightness laser output.We discussed the characteristics of the external cavity feedback efficiency an...We studied the spectral beam combining[SBC]of a large optical cavity[LOC]laser array to achieve high-power and highbrightness laser output.We discussed the characteristics of the external cavity feedback efficiency and the focal length of the transform lens for lasers with different waveguide thicknesses.We have found that using LOC laser diodes can increase the proportion of external cavity feedback,thereby improving the SBC efficiency.At a current of 90 A,the CW output power of the SBC system is 59.2 W,and the SBC efficiency reaches up to 102.8%.All emitters of the laser array have achieved spectral locking with a spectral width of 11.67 nm,and the beam parameter product is 4.38 mm·mrad.展开更多
基金Project supported by the State Key Development Program for Basic Research of China (Grant No. G20000863-02)the Natural Science Foundation of Beijing, China (Grant No. 4032007)
文摘A novel coupled multi-active-region large optical cavity structure cascaded by a tunnel junction is proposed to solve the problems of facet catastrophic optical damage （COD） and the large vertical divergence caused by the thin emitting area in conventional laser diodes. For a laser with three active regions, a slope efficiency as high as 1.49 W/A, a vertical divergence angle of 17.4~, and a threshold current density of 271 A/cm~ are achieved. By optimizing the structural parameters, the beam quMity is greatly improved, and the level of the COD power increases by more than two times compared with that of the conventional laser.
文摘To achieve high optical power as well as low vertical divergence angle,a new kind of optim ized large opti- cal cavity (L OC) structure is applied to a ridge waveguide 980 nm In Ga As/ Ga As/ Al Ga As m ulti- quantum well laser.The optical power density in the waveguide is successfully reduced.The maxim um output power is more than 40 0 m W with a slope efficiency of 0 .89W/ A and the far- field vertical divergence angle is lowered to 2 3°.
基金supported in part by the National Key R&D Program of China(No.2021YFA1400604)the National Natural Science Foundation of China(Nos.91850206 and62075213)。
文摘We studied the spectral beam combining[SBC]of a large optical cavity[LOC]laser array to achieve high-power and highbrightness laser output.We discussed the characteristics of the external cavity feedback efficiency and the focal length of the transform lens for lasers with different waveguide thicknesses.We have found that using LOC laser diodes can increase the proportion of external cavity feedback,thereby improving the SBC efficiency.At a current of 90 A,the CW output power of the SBC system is 59.2 W,and the SBC efficiency reaches up to 102.8%.All emitters of the laser array have achieved spectral locking with a spectral width of 11.67 nm,and the beam parameter product is 4.38 mm·mrad.
