(LD发光描述)光纤束耦合LD输出光束的空间耦合技术研究.pdfVIP

30 3 Vol. 30, No. 3 2006 6 LASER TECHNOLOGY June, 2006 : 2006) LD 1, 2 1, 3 1 1 1 1 李武军 , 杨爱粉 , 王石语 , 蔡德芳 , 文建国 , 过 振 ( 1. , 710071; 2. , 710032; 3. , 710075) : , LD ; LD , , , , ; , , : ; ; ABCD ; ; : TN247 : A Study of space coupling technology of fiber bundle coupling LD output beam s 1, 2 1, 3 1 1 1 1 LI W uj un , YAN G A ifen , WAN G Shiyu , CA I D ef ang , WEN J ianguo , GUO Zhen ( 1. School of Techn ical Physics, X id ian Un iversity, Xian 710071, Ch ina; 2. Departm ent ofM athem atics Phys ics, X ian Institute of Technology, X ian 710032, China; 3. X ian Institute ofApplied Optics, X ian 710075, Ch ina) Abstract: Based on the fact the optical field distribution of the transm itted beam s of a mu ltim ode fiber can be treated as Gaussian d istribution, the optical fields of a fiber bund le made up ofm ultimode fibers are incoherent. The intensity d istribu tion of a fiber bundle coupling LD ou tput beam s transm itting space coup ling system is num erically s mi u lated and expermi entally studied. The smi ulation results are in good agreem ent w ith the expermi ental ones. Both of them show that for a th in convex lens, the m axmi um intensity value and the m in mi um beam size are obtained in the focal p lane, and that w ith the increase of the focal length, the beam size increase linearly and center intens ity decrease dramatically in the focal p lane. K ey words: fiber optics; space coupling; opticalAB CD system; intens ity d istribution; th in convex lens