DESIGN APPROACHES FOR LASER-DIODE MATERIAL-PROCESSING SYSTEMS USING FIBERS AND MICROOPTICS

被引:18
作者
CHEN, WQ [1 ]
ROYCHOUDHURI, CS [1 ]
BANAS, CM [1 ]
机构
[1] UNIV CONNECTICUT,DEPT ELECT & SYST ENGN,STORRS,CT 06269
关键词
HIGH-POWER DIODE LASERS; LASER MATERIAL PROCESSING; MICROOPTICS; MICROLENSES; HIGH-BRIGHTNESS LASER SYSTEM; LASER-DIODE ARRAY; OPTICAL FIBER;
D O I
10.1117/12.183489
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Low-cost, efficient, and compact high-power laser diodes (LDs) will make desktop laser manufacturing (rapid prototyping, sintering, drilling, marking, etc.) a reality soon. Laser processing of materials requires not only high average power, from tens of watts to kilowatts, but also high incident beam intensity or power density, from 10(3) to 10(8) W/cm(2). Current commercial high-power LDs do emit 10(8) W/cm(2); however, they are microscopic in size, and an individual diode emits similar to 1 W (cw) in a highly divergent (similar to 30 x 10 deg) multimode structure. Gathering high power from a large number of such microscopic incoherent diodes into a small spot of high intensity requires micro-optic component and complex system design. Several different design approaches for high-intensity laser-diode systems are presented. Some of these are commercial, others will be soon, and still others will need technological developments. Possible applications and some preliminary results of direct diode-laser sintering and transformation hardening of stainless-steel ribbons are also presented.
引用
收藏
页码:3662 / 3669
页数:8
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