BiBO SPDC Crystals

Pump wavelength range: 350 - 800 nm.
Common pumps:
~ 390 - 415 nm (Diode lasers, Ti:Sapphire lasers)
~ 351 - 355 nm (THG of Nd: lasers)
Standard crystals are designed for Type I degenerate SPDC
Half opening angle between signal/idler: 3^o
Crystals for the opening angle = 0^o (collinear phase matching) or other angles
are availble upon request.
Non-degenerate SPDC crystals are available upon request.
Aperture sizes: 5x5 mm, 8x8 mm. OD 1" mounted.

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Model	Name	wavelength	material	Price	Availability	Action
NCBiBO5050-405(I)-HA3	BiBO crystal, Size 5x5x0.5mm, cut for Type I phase matched SPDC pumped by 405nm with the half opening angle of 3 degrees, AR coated	Pump: 405nm	SPDC Crystal	Ask	Out Of Stock
NCBiBO5100-405(I)-HA3	BiBO crystal, Size 5x5x1.0mm, cut for Type I phase matched SPDC pumped by 405nm with the half opening angle of 3 degrees, AR coated	Pump: 405nm	SPDC Crystal	Ask	Out Of Stock
NCBiBO5200-405(I)-HA3	BiBO crystal, Size 5x5x2.0mm, cut for Type I phase matched SPDC pumped by 405nm with the half opening angle of 3 degrees, AR coated	Pump: 405nm	SPDC Crystal	Ask	Out Of Stock
NCBiBO5300-405(I)-HA3	BiBO crystal, Size 5x5x3.0mm, cut for Type I phase matched SPDC pumped by 405nm with the half opening angle of 3 degrees, AR coated	Pump: 405nm	SPDC Crystal	Ask	Out Of Stock
NCBiBO5050-355(I)-HA3	BiBO crystal, Size 5x5x0.5mm, cut for Type I phase matched SPDC pumped by 355nm with the half opening angle of 3 degrees, AR coated	Pump: 355nm	SPDC Crystal	Ask
NCBiBO5050-390(I)-HA3	BiBO crystal, Size 5x5x0.5mm, cut for Type I phase matched SPDC pumped by 390nm with the half opening angle of 3 degrees, AR coated	Pump: 390nm	SPDC Crystal	Ask
NCBiBO5300-775(I)-AR	BiBO crystal, Size 5x5x3.0mm, cut for Type I collinear phase matched SPDC pumped by 775nm, AR coated	Pump: 775nm	SPDC Crystal	Ask
NCBiBO5500-775(I)-AR	BiBO crystal, Size 5x5x5.0mm, cut for Type I collinear phase matched SPDC pumped by 775nm, AR coated	Pump: 775nm	SPDC Crystal	Ask

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Structural and Physical Properties:

Crystal Structure	Monoclinic, Point group 2
Lattice Parameters	a=7.116 Å, b=4.993 Å, c=6.508 Å, β=105.6°, Z =2
Melting Point	726 °C
Mohs Hardness	5 - 5.5
Specific Heat	0.5 J/gm-K at 330 K
Thermal Expansion	4.8x10^-5[X], 4.4x10^-6[Y], -2.69x10^-5[Z]
Density	5.033 g/cm³

Optical Properties:

Transmission Range	286-2500 nm (Transmission Curve@200-800nm, Thin BiBO, T=2.0mm)
NLO Coefficients	d11=2.53pm/V, d12=2.93pm/V, d13=-1.93pm/V, d14=1.63pm/V, d25=1.67pm/V, d26=3.48 pm/V d35=-1.58pm/V, d36=1.67pm/V (defined in the principal optical axes xyz: nz>ny>nx, x-1, y-2, z-3)
Refractive Indices	@539.75 nm: nx = 1.7874, ny = 1.8190, nz = 1.9620 @1079.5 nm: nx = 1.7569, ny = 1.7835, nz = 1.9166
Sellmeier Equations (λ in µm)	nx²=3.0740+0.0323/(λ²-0.0316)-0.01337λ² ny²=3.1685+0.0373/(λ²-0.0346)-0.01750λ² nz²=3.6545+0.0511/(λ²-0.0371)-0.0226λ²

Specifications of BiBO SPDC crystals:

Wavefront distortion:	≤ λ/6 @ 633nm
Clear aperture:	> 90% central area
Flatness:	≤ λ/6 @ 633nm
Scratch/Dig:	20/10 to MIL-O-13830A
Parallelism:	better than 30 arc seconds
Angle tolerance:	Δθ < +/-0.25o, Δφ < +/-0.25o

Coating:

AR@405/810nm for 405nm pumped SPDC crystals
Uncoated for pumps other than 405nm unless coating is specified.

Configuration of Mounted BiBO Crystal for SPDC in YZ plane: