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)
~ 351 - 355 nm (THG of Nd: lasers)
Common aperture sizes: 5x5 mm, 8x8 mm. OD 1" mounted.

Aplication Example:

Paired BBO crystals for ultrabright source of polarization-entangled photons

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Model	Name	wavelength	material	Price	Availability	Action
PABBO5050-405(I)-HA3	Paired BBO crystals, size 5x5x0.5mm(each), cut for Type I SPDC pumped by 405nm with the half opening angle of 3 degrees. The two crystals are optically contacted with one crystal rotated by 90 degrees about the axis normal to the crystal face. Moun	Pump: 405nm	SPDC Crystal	USD$1,099.00	Out Of Stock
PABBO5100-405(I)-HA3	Paired BBO crystals, size 5x5x1.0mm(each), cut for Type I SPDC pumped by 405nm with the half opening angle of 3 degrees. The two crystals are optically contacted with one crystal rotated by 90 degrees about the axis normal to the crystal face. Moun	Pump: 405nm	SPDC Crystal	Ask	Out Of Stock
PABBO5010-405(I)-HA3	Paired BBO crystals, size 5x5x0.1mm(each), cut for Type I SPDC pumped by 405nm with the half opening angle of 3 degrees. The two crystals are optically contacted with one crystal rotated by 90 degrees about the axis normal to the crystal face. Moun	Pump: 405nm	SPDC Crystal	Ask	Out Of Stock
PABBO5025-355(I)-HA3	Paired BBO crystals, size 5x5x0.25mm(each), cut for Type I SPDC pumped by 355nm with the half opening angle of 3 degrees. The two crystals are optically contacted with one crystal rotated by 90 degrees about the axis normal to the crystal face. Mou	Pump: 355nm	SPDC Crystal	Ask	Out Of Stock
PABBO5050-355(I)-HA3	Paired BBO crystals, size 5x5x0.5mm(each), cut for Type I SPDC pumped by 355nm with the half opening angle of 3 degrees. The two crystals are optically contacted with one crystal rotated by 90 degrees about the axis normal to the crystal face. Moun	Pump: 355nm	SPDC Crystal	Ask	Out Of Stock
PABBO5100-355(I)-HA3	Paired BBO crystals, size 5x5x1.0mm(each), cut for Type I SPDC pumped by 355nm with the half opening angle of 3 degrees. The two crystals are optically contacted with one crystal rotated by 90 degrees about the axis normal to the crystal face. Moun	Pump: 355nm	SPDC Crystal	Ask	Out Of Stock
PABBO5050-775(I)-HA3	Paired BBO crystals, size 5x5x0.5mm(each), cut for Type I SPDC pumped by 775nm with the half opening angle of 3 degrees. The two crystals are optically contacted with one crystal rotated by 90 degrees about the axis normal to the crystal face. Moun	Pump: 775nm	SPDC Crystal	USD$1,299.00

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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.