Diode-pumped Solid-state Lasers: All-in-one DPSS lasers are tailored for marking and engraving
Feb 11, 2016
MARIN ILIEV and HEIDI GARDINER
A compact, stable nanosecond-pulse DPSS marking laser with all-in-one thermal packaging is intended for widespread use by everyday users.
Aided by advances in semiconductor technology and crystallography, diode-pumped solid-state (DPSS) laser systems have become the norm when it comes to fast and ultrafast (nano- to picosecond) high-power, industrial-grade laser systems. Currently, the most widespread amplification materials in these systems are Nd:YAG and vanadate (Nd:YVO4) because of their high gain, large thermal-load capabilities, and their close-to-single-frequency emission spectra.
These four-level systems are usually in an end-pumped rod or disk configuration to ensure close-to-perfect mode overlap with the pump beam, which in turn improves extraction efficiency of the energy deposited in the crystal by the resonating beam. The pump diode's narrow spectrum is sharply tuned to the 808 nm absorption line of neodymium, thus reducing the thermal load on the crystal.