Coherent has introduced the Verdi G8, the highest power 532nm scientific-grade laser based on the company's optically pumped semiconductor laser (OPSL) technology. With 8W of output, this laser provides a next-generation solution for pumping Ti:sapphire-based ultrafast laser oscillators in applications such as spectroscopy, pump-probe dynamics and materials research.
Like other Verdi G lasers, the new G8 delivers lower noise (<0.03 per cent rms) than other lasers based on diode-pumped solid state (DPSS) technology. Whereas the multimode operation of DPSS lasers generates chaotic sum frequency noise, the short upper laser lifetime of OPSL devices totally eliminates so-called 'green noise.' In addition, the thin OPSL chip (a few microns) prevents thermal lensing effects that are present in all DPSS lasers, which means that the output power of Verdi G can be adjusted over the entire dynamic range without affecting beam parameters.
The OPSL technology used in the Verdi G series has already been proven in more than 25,000 OPSL units now in the field. This technology, combined with Coherent's proprietary PermAlign manufacturing process offers a reliable approach to generating visible laser light. In addition, Coherent leads the industry with pump diode reliability with a mean time to failure (MTTF) of over 50,000 hours for high-power pumps. The reliability is backed by a two year/10,000-hour warranty, which means that the Verdi G series offers a low overall cost of ownership.