Ultrafast Infra-Red Lasers for Quantum Applications

A world leader in the design and development of ultrafast femtosecond and picosecond infrared lasers provides enabling technology for quantum applications.

Chromacity ultrafast lasers help to generate entangled photons. Image Credit: Chromacity

Chromacity’s ultrafast lasers are an ideal platform to generate entangled photons, essential for many emerging technologies such as quantum-secured intercontinental communications based on quantum key distribution (QKD). Researchers at the University of Glasgow have used a Chromacity ultrafast 1040 nm femtosecond laser to generate pairs of entangled photons by passing them through a non-linear crystal.

A similar process is used by Chromacity in its own near and mid infra-red optical parametric oscillator (OPO) based lasers. The Chromacity Auskerry and Haskeir lasers are seeded by the same spontaneous parametric down-conversion (SPDC) process, using an ultrafast laser source to pump a non-linear crystal.

The Auskerry laser uses a periodically poled lithium niobate (PPLN) non-linear crystal to generate near infrared light in the range of 1.4 um to 4.5 um. The Haskeir laser uses a different Orientation Patterned Gallium Phosphide (OP-GaP) non-linear crystal to generate mid-infrared light in the 4.5 um to 12 um range.

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