For quantum applications, lasers are an essential component, whether it is to manipulate the atom or cool it to the incredibly cold temperatures that are required.
A key principle in laser cooling is that light carries momentum. If an atom moving in one direction absorbs a photon moving in the opposite direction, the momentum is transferred to the atom and it slows down. As atoms can move in 3 dimensions, six lasers are required – one from each side of the x, y and z axes.
Laser cooling can bring atoms to microkelvin temperatures, millionths of a degree above absolute zero. The atoms are kept in an ultra-high vacuum so the lasers used need to access the vacuum chamber.
Special Techniques Group offers bespoke optical viewports, fabricated by diffusion bonding, that are suitable for many demanding ultra-high vacuum cryogenic applications. This makes them ideal for cold atom science and quantum system research and development. Our non-magnetic, ultra-thin windows can be precisely positioned and have features that include:
- Low distortion
- High numerical aperture
- High bake out temperatures
Key technical specifications
|Geometry||Up to 300 x 300 x 300mm. Larger assemblies can be considered|
|Coatings||Any standard industry option|
|Bake Out Temperature||250°C. Higher temperatures are possible|
|Surface Finish||Based on customer preferences e.g. electropolishing|
|Optical Flatness / Transmitted Wavefront Error (TWE)||Lambda/8 – Lambda/10|
|Optical Parallelism (tilt)||< 10 arc seconds|
|Optical Polish||20/10 to 80/50 scratch/dig|
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