Quartz Crystals

Crystalline quartz is a positive uniaxial crystal with a moderate birefringence over the broad transparent range from 200 nm to 2300 nm. The excellent physical, chemical, and optical properties of crystalline quartz such as high transmittance in ultraviolet, visible and infrared, the resistance to moisture, high damage threshold, and resistance to scratch make it the most favourable material for fabrication of birefringent filter plates, waveplates and many other birefringent components.

Most of the items on this page are A-cut (90°-cut) quartz plates/blocks for maximum birefringence. The thickness can be as thin as ~ 20 um (ultrathin) or larger than 1" (25.4 mm). C-cut (with the optical axis normal to the entrance face) plates are also available upon request.

For waveplates manufactured from quartz crystal, please visit Waveplates.

For our BIR series of birefringent filter plates (Lyot filters), please visit Birefringent filter plates.

For polarization rotators based on the optical activity of quartz crystal, please visit Polarization Rotators.

Quartz crystal wedges/prisms/lenses are also available. Please check the "Tech Info" tab below.

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Model	Name	holder	coating	attr_size	Price	Availability	Action
QAM5010-A	Quartz crystal, size 5 x 5 x 0.1mm, a-cut, uncoated, unmounted	Unmounted	Uncoated	5 x 5 x 0.1 mm	USD$249.00
QAM5680-A-AR405/810	Quartz crystal, size 5 x 5 x 6.80mm, a-cut, coated@405/810nm, mounted in 1" anodized Al holder	OD 1"	AR@405/810nm	5 x 5 x 6.80 mm	USD$429.00	Out Of Stock
QAT5100-A	Quartz crystal, size 5 x 5 x 10.0mm, a-cut, uncoated, mounted in 1" anodized Al holder	OD 1"	Uncoated	5 x 5 x 10.0 mm	Ask	Out Of Stock
QAT5100-A-AR405/810	Quartz crystal, Size 5 x 5 x 10.0mm, a-cut, AR coated@405/810nm, mounted	OD 1"	AR@405/810nm	5 x 5 x 10.0 mm	Ask	Out Of Stock
QAT5158-45-AR1064/532	Quartz crystal, Aperture 5x5mm, Length 15.8mm, 45-deg cut, Dual wavelength AR coated @ 1064/532nm	Unmounted	AR@1064/532nm	5 x 5 x 15.8 mm	USD$469.00	Out Of Stock
QAT5150-A	Quartz crystal, size 5 x 5 x 15.0mm, a-cut, uncoated, mounted in 1" anodized Al holder	OD 1"	Uncoated	5 x 5 x 15.0 mm	USD$379.00	Out Of Stock
QAT5200-A	Quartz crystal, size 5 x 5 x 20.0mm, a-cut, uncoated, mounted in 1" anodized Al holder	OD 1"	Uncoated	5 x 5 x 20.0 mm	USD$409.00	In Stock
QAM12020-A	Quartz crystal, size 12.7 x 12.7 x 0.2mm, a-cut, uncoated, OD 1"	OD 1"	Uncoated	12.7 x 12.7 x 0.2 mm	USD$279.00	Out Of Stock
QAM12020-A-AR1550	Quartz crystal, size 12.7 x 12.7 x 0.2mm, a-cut, AR coated@1550nm, mounted in 1" anodized Al holder	OD 1"	AR@1550nm	12.7 x 12.7 x 0.2 mm	USD$379.00	Out Of Stock
QAM12030-A-AR1030	Quartz crystal, size 12.7 x 12.7 x 0.3mm, a-cut, AR coated@1030nm, mounted in 1" anodized Al holder	OD 1"	AR@1030nm	12.7 x 12.7 x 0.3 mm	USD$349.00	Out Of Stock
QAM12050-A	Quartz crystal, size 12.7 x 12.7 x 0.5mm, a-cut, uncoated, mounted in 1" anodized Al holder	OD 1"	Uncoated	12.7 x 12.7 x 0.5 mm	Ask	Out Of Stock
QAM12050-A-AR405/810	Quartz crystal, size 12.7 x 12.7 x 0.5mm, a-cut, AR coated@405/810nm, mounted in 1" anodized Al holder	OD 1"	AR@405/810nm	12.7 x 12.7 x 0.5 mm	USD$349.00
QAM12100-A	Quartz crystal, size 12.7 x 12.7 x 1.0mm, a-cut, uncoated, mounted in 1" anodized Al holder	OD 1"	Uncoated	12.7 x 12.7 x 1.0 mm	USD$249.00	Out Of Stock
QAM12100-A-AR1550	Quartz crystal, size 12.7 x 12.7 x 1.0mm, a-cut, AR coated@1550nm, mounted in 1" anodized Al holder	OD 1"	AR@1550nm	12.7 x 12.7 x 1.0 mm	USD$349.00	Out Of Stock
QAR12150-A	Quartz crystal, Dia. 12.7 x 1.5mm, a-cut, uncoated, unmounted	Unmounted	Uncoated	Dia 12.7 x 2.0 mm	USD$249.00	Out Of Stock

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Basic Properties of Quartz Crystal (alpha-Quartz):

Transparency Range: 200 - 2300 nm			Transmission Curve (uncoated)
Crystal Symmetry: Trigonal, P3₁21
Lattice Constants: a=b=4.9133 A, c=5.4053 A
Density: 2.65 g/cm³
Thermo-Optic Coefficients: dno/dT= -5.2 x 10^-6 /^oC @ 530 nm dne/dT= -6.3 x 10^-6/^oC @ 530 nm
Damage Threshold (10 ns, 10 Hz) ~ 1 GW/cm² at 1064 nm ~ 500 MW/cm² at 532 nm
Optical Homogeneity: Δn < 10^-6/cm
Mohs Hardness: 7
Thermal Expansion Coefficients:			α_a = 14 x 10^-6/K α_c = 7.6 x 10^-6/K
Linear Absorption Coefficients: α < 0.01 cm^-1 from 300 to 2300 nm
Sellmeier Equations: (λ in µm) : n_o²=2.3573-0.01170λ²+0.01054/λ²+1.3414x10^-4/λ⁴-4.4537x10^-7/λ⁶+5.9236x10^-8/λ⁸ n_e²=2.3849-0.01259λ²+0.01079/λ²+1.6518x10^-4/λ⁴-1.9474x10^-6/λ⁶+9.3648x10^-8/λ⁸
Wavelength (nm)	n_o	n_e	Birefringence (Δn=n_e-n_o)	Walk-off Angle at 45°
1064	1.5341	1.5428	0.00872	-0.325°
800	1.5384	1.5473	0.00891	-0.331°
632.8	1.5427	1.5517	0.00906	-0.336°
532	1.5469	1.5561	0.00920	-0.340°
400	1.5577	1.5673	0.00957	-0.351°
355	1.5646	1.5744	0.00982	-0.358°
266	1.5916	1.6024	0.01077	-0.386°

Specifications of Quartz windows:

Aperture Tolerance:	±0.1 mm
Thickness Tolerance:	±0.1 mm (for T>1.0mm), ±0.05 mm (for T<1.0 mm)
Clear Aperture:	85%
Optical Axis Orientation:	+/-5 arc min
Surface Quality:	20/10 Scratch/Dig
Perpendicularity:	< 3 arc min.
Parallelism:	< 1 arc min.
Flatness:	< λ/8 @ 632.8 nm (for T>= 1.0mm)
Transmission Wavefront Distortion:	< λ/10 @ 632.8 nm
Bevel:	< 0.25 mm X 45°

a-cut ( 90 deg-cut ) Quartz crystal:

Prisms:

Quartz crystals with a wedge angle (α) can be custom fabricated with the specified orientation of the optical axis. A paired or such prisms with the optical axes orthogonal to each other can be used to continuously adjust the phaseshift or time delay between two orthogonally polarized pulses.

Coatings:

Quartz windows or blocks are uncoated unless the coating is specified.

Input and output faces can be AR coated with R < 0.25% at the specified central wavelength. Please specify the coating and append to the part number, e.g. QAR5010-A-AR800 for the quartz plate with the AR coating @ 800 nm.

Common AR coatings: AR@266, 355, 400-410, 532, 800-820, 1064 nm, dual AR@800/400 nm, 1064/532 nm, and broadband AR@400-700 nm (VIS), AR@500-1100 nm.

Mount:

For customer convenience and protection of crystals, crystals with T≤ 3.0mm are mounted in a 1" anodized aluminum holder. Thicker crystals can be mounted in a 1" holder upon request.