Paired BBO Crystals

Two identical Type I SPDC crystals mounted with one crystal rotated by 90^o
about the axis normal to the crystal face. Two optical axes aligned in
perpendicular planes.
Optically contacted structure with no optical cement in the beam path.
Standard half opening angle between signal/idler: 3^o
Pump wavelength range: 248 - 800 nm.
Common pumps:
~ 390 - 415 nm (Diode lasers, Ti:Sapphire lasers)
~ 342 - 355 nm (THG of Nd:/Yb: lasers)
~ 257 - 266 nm (4HG of Nd:/Yb: lasers)
Common aperture sizes: 5x5 mm, 8x8 mm. OD 1" mounted.

Aplication Examples:

Paired BBO crystals for ultrabright source of polarization-entangled photons
405nm pumped Paired BBO crystals for Bell inequality test and quantum imaging (ICE)
266nm pumped Paired BBO crystals for quantum microscopy of cells (QMC) at the Heisenberg limit

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Part No.	Description	Application	Material	Wavelength	Bandwidth	Size	Aperture	Thickness	Length	Angle	Doping	Orientation	Displacement	Retardation	Delay	Coating	End cut	Holder	Price	Availability	Add to Cart

Specifications of BBO 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:

Dual AR@405/810 nm for 405nm pumped SPDC crystals,

Broadband P-coating for pumps other than 405nm unless the coating otherwise specified.

Coatings:

405 nm Pump: Multilayer AR coating AR@405/810 nm on input/output surfaces
Pumps other than 405 nm: Single layer MgF₂ protective coating (P-coating) on input/output surfaces

* Multilayer AR coatings at the specified wavelengths are available upon request.

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