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Waveplate Bar
  • Near zero inclusions
  • 100 mm and 150 mm diameter
  • X-Plates available
  • X-Growth to maximise available seed-free volume for X-Plates

 

 

Low Pass Optical Filter (LPOF) Bar

  • Z Growth to maximize available see-free vlume for Z plates
  • 100mm and 150mm diameter Z-Plates available
  • Near-zero inclusion density

 

 

Optical Half Section

  • Bar grown from a Z-Plate seed
  • Bar shown has no seed

Optical Quartz Material Properties - Crystal Quality

Infrared αa
< 0.060 (3500 cm-1 basis)
Inclusions

Near zero (LPOF, WP grades)

< 1.2/cm3 (OPAG grade)
Etch channel densitya
< 100/cm2
Handednessb
Right (left available upon request)
Twins
None
Impurities (ppm)
Al < 5.0
Ca < 5.0
K < 5.0
Na < 5.0
Mg < 1.0
Ti < 1.0
Cu < 0.5
Fe < 0.5
Li < 0.5
Mn < 0.5

Optical Quartz Physical Properties

Coefficient of thermal expansion

7.97 x 10-6/C (// c-axis, 0-80C)

13.37 x 10-6/C ( c-axis, 0-80C)
Thermal conductivity

10.7 W/mC (// c-axis, @ 50C)

6.21 W/mC ( c-axis, @ 50C)
Specific heat
0.787 J/gC (@ 25C)
Density
2.648 g/cm3
Young’s modulus

97 Gpa (// c-axis, @ 25C)

76.5 Gpa ( c-axis, @ 25C)

 

Quartz Optical Properties

Refractive Index

λ (nm)

no

ne

λ(nm)

no

ne

185.1

1.67750

1.68988

627.8

1.54282

1.55188

193.6

1.65999

1.67343

667.8

1.54155

1.55057

200.1

1.64927

1.66227

706.5

1.54049

1.54947

219.5

1.62497

1.63698

766.5

1.53907

1.54801

242.8

1.60525

1.61650

794.8

1.53848

1.54739

250.3

1.60032

1.61139

844.7

1.53753

1.54640

303.4

1.57955

1.58720

1000.0

1.53503

1.54381

340.4

1.56747

1.57737

1083.0

1.53387

1.54260

404.6

1.55716

1.56671

1541.0

1.52781

1.53630

467.8

1.55103

1.56031

2053.0

1.52005

1.52823

508.0

1.54822

1.55746

2600.0

1.5096

1.5172

546.1

1.54617

1.55535

3000.0

1.4998

1.5070

589.3

1.54425

1.55336

4000.0

1.4654

1.4709
dn/dT @ 640 nm
ne

-0.65 x 10-5/°C
no

-0.55 x 10-5/°C

 

a Measured in accordance with IEC Standard CEI/IEC 758, Second Edition, 1993-04.

b Right handedness defined as clockwise rotation of light polarization plane while viewing toward the light source.