In the technology, we integrate Taiwan’s strength in high-brightness LED
and our strength in high-power sources to commercialize LED-pumped so
lid-state laser. This product is the first commercial-grade LED-pumped soli
d-state laser in the world, all made in Taiwan!
In our product, the LED generates high-power pump light to achieve popu
lation inversion in a laser gain crystal installed in a laser cavity. There are a
few challenges in developing such a unique laser source, including the lar
ge divergence of the LED light and the high heat generated in the laser m
odule. To overcome these problems, we first invent a pump-light structure
that can efficiently collect the LED light to the laser-gain crystal. Secondly,
we design an efficient cooling structure to remove the waste heat from th
e laser as well as the LED dies. Our LED-pumped laser has generated more
than 500-mJ pulse energy repeating at 10 Hz at 1064 nm in quasi-CW ope
ration. By inserting a laser Q-switch in the laser cavity, the peak laser powe
r reaches nearly 3 MW in a ~25-ns pulse width. This is the most powerful a
nd the only industry-grade LED-pumped sold-state laser in the world.