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● Q-switch (Laser Ranging, Laser Radar, medical laser, Industrial Laser)
● Laser power/phase modulation
● Pulse Picker
● an excellent crystal for Electro Optical applications at high repetition rate
● Large nonlinear optical and electro-optical coefficients
● Low half-wave voltage
● No Piezoelectric Ringing
● high damage threshold;
● High Extinction Ratio
● Non-hygroscopic
Dimension Tolerance W(+/-0.1) * H(+/-0.1) * L(+0.5/-0.1) mm
Angle Tolerance +/-0.15° Perpendicularity ≤10′
Scratch / Dig 20/10 Chamfer ≤0.2mmx45°
Parallelism ≤5″ Chip ≤0.1mm
Flatness λ/10@633nm CA ≥90%
TWD λ/6@633nm Electrode Ti  or  Au
Extinction Ratio >20dB    
Coating AR@1064nm(R<0.2%),  or customized upon request
Damage Threshold 600MW/cm² 10ns 10Hz at 1064nm
Type Size of Single Crystal(mm) Length of Holder(mm) Half-wave voltage(V)
QR2205A 2X2X5 12 1600V
QR3305A 3X3X5 14 2400V
QR4405A 4X4X5 14 3200V
QR4410A 4X4X10 25 1600V
QR6605A 6X6X5 14 4800V
QR6610A 6X6X10 25 2400V
QR8805A 8X8X5 14 6400V
QR8810A 8X8X10 25 3200V
QR1005A 10X10X5 14 8000V

Physical and Optical Properties    

Crystal structure Orthorhombic
Cell Parameters a = 12.96 Å; b =10.56 Å; c =6.49 Å
Mohs hardness 5
Density, g/cm3 3.6
Melting Point: ~ 1000˚C
Ferroeletric transition temp. ~ 810°C
Color Colorless
Thermal Expansion Coefficients (/K)  αx=1.01x10-5, αy =1.37x10-5, αz =-4.17x10-6
Dielectric Constant Eeff= 13.0
Thermo-optical coefficients (dλ/dT) -0.029 nm / °C
Electro-optic constants Y-cut: r51=38.5 pm/V X-cut: r33=35 pm/V,r23=12.5 pm/V, r13=10.6 pm/V
Nonlinear Coefficients: d15 = 2.0 pm/V; d24 = 3.6 pm/V; d31= 2.0 pm/V d32 = 3.6 pm/V; d33 = 8.3 pm/V
Electrical Resistivity around 1011-1012ohm·cm
Hygroscopic no
Static Half Wave Voltage at 1064 nm   4x4x20 mm: 1,600 V 6x6x20 mm: 2,400 V
Transmitting range: 350~4500 nm
Sellmeier equations(λ in um) nx2=2.15559 + 0.93307[1-(0.20994/λ)2] - 0.01452λ2
ny2=2.38494 + 0.73603[1-(0.23891/λ)2] - 0.01583 λ2
nz2=2.27723 + 1.11030[1-(0.23454/λ)2] - 0.01995λ2