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SLIM Platform  |  SLIM-473  |  SLIM-532  |  SLIM-561  |  VIOLET  |  Technology

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A market-proven technological basis :
the DPSS laserOver the last five years, laser diode manufacturers have significantly improved their products in terms of power and reliability. 808 nm laser diodes in particular have now reached a mature industrial status with significant production volumes and a firm control on yield and quality.

This technological evolution supports a growing trend: the replacement in many applications of traditional laser designs (flash lamps-pumped solid-state and gas lasers) by diode-pumped solid-state (DPSS) solutions. In this architecture, a semiconductor diode is used to pump a lasing medium made of synthetic crystal. DPSS lasers indeed offer major advantages such as reduced power consumption, low voltage operation, increased lifetime and smaller footprint. In addition, crystals allow the selection of one emission line amongst many available, have long-lifetime energy levels filtering out the pump noise, and exhibit a long-term stability inherent to their solid state.

A design breakthrough :
the Alignment-free Monolithic ResonatorOptical crystals display several characteristics of particular value for laser design: they can be cleaved or cut with the greatest angular accuracy, they can be polished down to a nanometer-scale surface quality and they can be dielectrically coated with mirrors or filters. Crystals can be bonded without any glue (through a process named "optical contacting"), yielding ultra-low-loss monolithic assemblies. Furthermore, a high-quality resonator can be obtained without any mechanical adjustment thanks to the perfect angular control on the crystals.

Oxxius has devised a unique crystal architecture, the Alignment-free Monolithic Resonator (AMR). This patented technology allows most laser emission lines to be generated and doubled. AMR lasers provide many benefits of great value to their users:

• Ruggedness: The laser cavity cannot be misaligned by thermal or mechanical stress.
• Reliability: Highly reliable GaAs laser diodes are used to pump the lasing medium.
• Highest compactness: No micro-mechanical positioning or aligning element is required; the size of the optical laser head can be less than a cubic inch.
• Efficiency: Because high internal intensities are achievable, frequency doubling can be efficient with pump powers as low as one Watt.
• Scalable power levels: Due to the thermal properties of crystals, Watt-scale operation can be achieved without degradation.
• High spectral purity: With AMR's millimeter-scale cavity length, single longitudinal mode (SLM) operation can easily be achieved, with a linewidth smaller than 1 MHz and a high signal-to-noise ratio.
• Mass-production compatibility: Like semiconductor laser diodes, AMR lasers are ready to lase. No careful alignment procedure is needed.
• Versatility: With AMR, numerous laser wavelengths can be achieved and will be introduced in the near future.