[3] [3] OHKUBO M,NAMIKI S,IJICHI T,et al.0.98μm InGaAs-InGaAsPInGaP GRIN-SCH SL-SQW lasers for coupling high optical power into single-mode fiber[J].IEEE J Quantum Electronics,1993,29(6):1932-1935.

[4] [4] ZHANG G.High power and high efficiency operation of Al-free InGaAs/InGaAsP InGaP GRINSCH SQW laser[J].Electron Lett,1994,30:1230-1232.

[5] [5] ASONEN H,OVTCHINNIKV A,ZHANG G,et al.Aluminum-free 980 nm GaInAs/GaInAsP/GaInP pump lasers[J].IEEE J Quantum Electronics,1994,30:415-423.

[6] [6] XU Zun-tu,ZHANG Jing-ming,MA Xiao-yu,et al.High efficiency low vertical divergence angle 980nm Al-free active region lasers with novel large optical cavity and asymmetrical cladding layers[C]//Proceedings of SPIE,In-Plane Semiconductor Lasers Ⅳ,2000,3947:66-69.

[7] [7] GAO Wei,XU Zun-tu,NELSON A.Low-divergence high-power 980 nm single-mode diode lasers with asymmetric epitaxial struture[C]//Proceedings of SPIE,Materials and Devices for Optical and Wireless Communications,2002,4905:154-156.