Assembled Windows
Physical and Optical Properties
Crystal Structure: ............................................................Trigonal, space group R 3c
Transparency Range: .........................................................................420 - 5200 nm
Cell Parameters: .................................................................a = 0.515Å, c = 13.863Å
Melting Point: .......................................................................................1255 +/-5°C
Curie point: ...........................................................................................1140 +/-5°C
Optical Homogeneity: ...................................................................Δn ≈ 5 x 10 -5 /cm
Mohs Hardness: .......................................................................................................5
Density: ....................................................................................................4.64 g/cm3
Thermal Conductivity: ................................................................38 W /m /K @ 25°C
Absorption Coefficient: ............................................................<0.1%/cm @ 1064 nm
NLO coefficients: ................d33 = 34.4pm/V d31 = d15 = 5.95pm/V d22 = 3.07pm/V
Damage Threshold at 1.064 mm: ..........................................................200 MW/cm2
Refractive Indices:...............................................ne = 2.146, no = 2.220 @ 1300 nm
...............................................ne = 2.156, no = 2.322 @ 1064 nm
..............................................ne = 2.203, no = 2.286 @ 632.8 nm
Typical Specification and Capabilities
Angle tolerance: .................................................................Δθ< ± 0.5°; Δφ< ±0.5°
Dimension tolerance: ................(W ± 0.1mm) x (H ± 0.1mm) x (L + 0.2mm/-0.1mm)
Flatness: ...........................................................................................< λ/8 @ 633nm
Scratch/Dig code: ...........................better than 10/5 Scracth/dig per MIL-O-13830A
Parallelism: ....................................................................................< 20 arc seconds
Perpendicularity: ...............................................................................< 5 arc minutes
Wavefront distortion: ........................................................................< λ/8 @ 633nm
Clear aperture: ...........................................................................> 90% central area
Aperture: ....................................................................................................1~50 mm
Length: ....................................................................................................0.3~20 mm
Phase matching type: ......................................................................Type I or Type II
End configuration: .............................................Flat, spherical, parallel and wedged
Typical Coating: .......................................................................Antireflective Coating
