Coherent expands low-noise green pump laser product line

Coherent Inc.,  Santa Clara, CA, has launched the Verdi G7, delivering the highest power level yet for the company’s Verdi G family of low-noise CW lasers based on next-generation optically pumped semiconductor laser (OPSL) technology.

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The Verdi G7 provides a minimum power of 7 W in a TEM00 output beam. Intended principally for pumping Ti:Sapphire laser systems, this new laser delivers high reliability, low cost of ownership and low noise (<0.03% rms). All Verdi G lasers have a comprehensive 2 year/10,000 hour warranty.

In OPSL, 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 532 nm DPSS lasers operating on multiple longitudinal modes. Thus, Verdi G lasers deliver low noise 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, lowering the long-term cost of ownership.

The Verdi G7 is good 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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