渐变方式对量子阱激光器电流注入效率的影响-华南师范大学学报.PDF

华南师范大学学报 (自然科学版 ) 2008年 2月 JOURNAL OF SOUTH CH INA NORMAL UN IVERSITY 2008年第 1期 Feb. 2008 ( NATURAL SCIENCE ED IT ION) No. 1, 2008 : 1000 5463( 2008) 01 0078 04 1, 2 1* 陈贵楚 , 范广涵 ( 1. , 510631; 2. , 526061) : 4, , , . : ; ; : J653 : A ANALYSIS OF CURRENT INJECTION EFFICIENCY FOR EMPLOYING DIFFERENT GRADED MODES I N QUANTUM WELL LASER 1, 2 1* CHEN Gui chu , FAN Guang han ( 1. Institute ofPhotoelectric Material and T echnology, South China N orm alUniversity, Guangzhou 510631, China; 2. Departm ent of Physics, Zhaoqing University, Zhaoqing 526061, Guangdong, China) Abstract: Four varieties of graded index separate confine heterostructures including lin ear, parabolic, diffusional, and Gaussian modes are introduced to the InGaA sP quantum well laser. Some comparative results are obtained by using the current continuous equations and the Possian equation to makem athematical calculations. The results reveal several rela tions between the current injection efficiency and a few parameters, .i e. the injection cur rent density, the active region w idth, the graded layer w idth, and the barrier layerw idth. Furthermore, some analyses about these results have been done explicitly. Key w rds: laser; graded mode; injection efficiency ( separate confine heterostucture, SCH ) , , . SCH, , , . , : 2007 04 25 : LED( 2004U 13D0021); : ( 1973 ),, , 2006, Em ai:l gchenbox@ 163. com; ( 1945 ), , , , . * 第 1期 陈贵楚等: 渐变方式对量子阱激光器电 注入效率的影响 79 2, , ( SCH ) . , [ 1] , ( 10~ 100 ps)( 1~ 1