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Verdi G7

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Coherent has launched the Verdi G7, a model that delivers the highest power level yet in its Verdi G family of low-noise CW lasers based on optically pumped semiconductor laser (OPSL) technology.

The Verdi G7 provides a minimum power of 7W in a TEM00 output beam. Intended principally for pumping Ti:Sapphire laser systems, this new laser delivers higher reliability, lower cost of ownership and lower noise (<0.03 per cent rms) than competitive multi-longitudinal mode lasers based on diode-pumped solid-state (DPSS) technology. The reliability of all Verdi G lasers is underlined by a two-year/10,000 hour warranty.

In OPSLs, the gain medium is a semiconductor chip that has a near-zero upper state lifetime.  This eliminates the 'green noise' component of laser output noise that is found in 532nm DPSS lasers operating on multiple longitudinal modes. So Verdi G lasers deliver exceptionally low noise yet without single-mode operation. And because the gain medium is a thin chip that is cooled from its rear surface, it does not suffer from thermal lensing effects. As a result, the output power of Verdi G lasers can be smoothly adjusted with no effects on beam quality, divergence or beam pointing. Plus the efficiency of the OPSL design means these Verdi G lasers use only a single diode array, significantly lowering the long-term cost of ownership.

The Verdi G7 is ideal for pumping ultrafast and CW Ti:Sapphire laser systems for applications in spectroscopy, pump-probe dynamics and materials research. OPSL technology is already field-proven in these applications as the integrated pump laser in Coherent's Mantis – a one-box femtosecond oscillator.

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