Single Frequency DPSS laser at 640 nm with 1000 mW output power

14 Mar 2019

Single Frequency DPSS laser at 640 nm with 1000 mW output power is available now from UniKLasers. UniKLasers’ Solo 640 has excellent performance characteristics and is particularly suited for applications that require high wavelength and output power stability.

The largest observed drift in the wavelength is 320 femtometers over hours of operation in production environment, including the warm up time. The output power stability is typically measuring with 0.31% peak to peak noise and 0.02% RMS over 0-10 MHz. Solo 640 has first-rate beam quality with excellent TEM00 Gaussian beam & M2

UniKLasers Ltd, based in Edinburgh, UK are expert in Single Frequency DPSS lasers with a focus on mid to high output powers. The company designs and manufactures single frequency lasers in a wide range of wavelengths using a technique called Bragg Range Michelson Mode Selection (BRaMMS).

The technique replaces an end cavity mirror with a volume Bragg grating and Michelson interferometer to create the mode selectivity of a single mode laser. The result is an ultra-stable laser output that is mode-hop and drift free. The laser has a high spectral purity with linewidths below 500 kHz (coherence lengths over 100m). Since the VBG reflectivity is limited to a small wavelength range, it can be selected to promote a range anywhere in the output bandwidth of the gain media. This increases the wavelength options available, which means fundamental wavelengths can be used rather than frequency doubled options, the increased efficiency leads to higher available power and reduced thermal management requirements.

With the wavelength now being a function of cavity length, the stability of the output is reliant on reducing fluctuations in the position of the end mirrors. This is easily compensated for by using PZT control linked to a feedback mechanism that corrects any expansion/contraction of the laser head. This feedback loop has the added benefit in that it allows for a fine tunability of the wavelength output, or alternatively locking the absolute frequency to an external reference.

The lasers are therefore ideal for such applications as

* Holography

* Semiconductor Metrology

* Interferometry

* Brillouin Scattering

* Raman Spectroscopy

* Quantum technology

To find out more about the UniKLasers product range, the BRaMMS technique or to get further information please visit our web site www.uniklasers.com or contact us directly on info@uniklasers.com