Abstract
To solve the problem that the power density of laser beam attenuated along the propagation direction, which was caused by large beam divergence angle (14°-46°) of semiconductor laser diode, a beam shaping optical system to improve power density was proposed. An X type planoconvex cylindrical lens and a Y type planoconvex cylindrical lens were selected to collimate the laser beam. Then, a pair of planoconvex spherical lenses were applied to improve the parallelism. Finally, a single planoconvex spherical lens focused the laser beam to a spot with high power density. The lenses were chosen and optimized through Light Tools simulation. A real beam shaping optical system was mounted and built. Test results show that 67% laser power is converged into a cycle with diameter of 1 mm, and the power density is over 30 W/cm2.
| Translated title of the contribution | Beam shaping method to improve power density of semiconductor laser diodes |
|---|---|
| Original language | Chinese (Traditional) |
| Article number | 0805010 |
| Journal | Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering |
| Volume | 48 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - 25 Aug 2019 |
| Externally published | Yes |