Paired BiBO Crystals

Paired BiBO Crystals
Paired BiBO Crystals

Two identical Type I SPDC crystals mounted with one crystal rotated by 90o 
  about the axis normal to the incidence face.
Standard half opening angle between signal/idler: 3o
Pump wavelength range: 350 - 780 nm.
  Common pumps: ~ 390-410 nm, ~ 355 nm.
Aperture size: 5x5 mm. OD 1" mounted.

Aplication Example:

Paired BiBO crystals for an ultrabright polarization-entangled photon source


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Specifications of  BiBO SPDC crystals:

Wavefront distortion: less than λ/8 @ 633 nm
Clear aperture: > 90% central area
Flatness: λ/8 @ 633 nm
Scratch/Dig: 10/5 to MIL-O-13830A
Parallelism: better than 20 arc seconds
Angle tolerance:   Δθ < +/-0.25o, Δφ < +/-0.25o

Coating:  AR@405/810 nm for 405 nm pumped SPDC crystals,
             For pumps other than 405 nm, the crystals are typically uncoated (UC).
                     AR coating is available with an additional cost.




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