| Main Specification | ||
| Orientation accuracy of cut angle | <30 arc min | |
| Angle tolerance | <10 arc min | |
| Dimension tolerance | +(0.05~-0.2) mm | |
| Flatness | <λ/4 @ 632.8 nm | |
| Surface quality | 20/10 Scratch/dig per MIL-O-13830A | |
| Parallelism | < 20 arc sec | |
| Perpendicularity | < 10 arc min | |
| Wavefront distortion | < λ/8 @ 633nm | |
| Clear aperture | > 90% central area | |
| Working temperature | 25°C | |
| Other Properties | ||
| Crystal Structure | Orthorhombic, Point group mm2, Space group Pna21 | |
| ¡¡ | KDP | KD*P(DKDP) |
| Cell Parameters | a=b=7.453; c=6.975 | a=b=7.469; c=6.976 |
| Chemical Formula | KH2PO4 | KD2PO4 |
| Hardness | 2.5 | 2.5 |
| Density | 2.338 g/cm3 | 2.355 g/cm3 |
| Hygroscopic Susceptibility | High | High |
| Transparency Range | 0.174 - 1.57 µm | 0.2 - 2.1 µm |
| Refractive Indices | no=1.4938, ne=1.4599 | no=1.4948, ne=1.4554 |
| at 1064nm | at 1064nm | |
| Sellmeier Equation | no2 = 2.259276 + 0.01008956/(l2 - 0.012942625) + 13.005522l2/(l2 - 400) | no2 = 1.9575544 + 0.2901391/(l2 - 0.0281399) - 0.02824391l2 +0.004977826l4 |
| ne2 = 2.132668 + 0.008637494/(l2 - 0.012281043) + 3.2279924l2/(l2 - 400) | ne2 = 1.5005779 + 0.6276034/(l2 - 0.0131558) - 0.01054063l2 +0.002243821l4 | |
| NLO coefficients(pm/V) | d36 = 0.39 at 1.064 µm | d36 = 0.37 at 1.064 µm |
| Electro-Optic Coefficients | r41=8.8pm/V | r41=8.8pm/V |
| r63=10.3pm/V | r63=25pm/V | |
| Longitudinal Half-Wave Voltage | Vp=7.65KV(l=546nm) | Vp=2.98KV(l=546nm) |
| Absorption/Absorptance | 0.07/cm | 0.006/cm |
| Optical Damage Threshold | >5 GW/cm2 | >3 GW/cm2 |
| Extinction Ratio | ¡¡ | 30dB |
| Notice ¡ï | Because polished surface could easily catch moistures, KDP must be kept in dry condition (<50%) and sealed housing. | |
| ¡ï | Engineers can select and design the best solution for you, if the main parameters of your laser are provided, such as energy per pulse, pulse width and repetition rate for a pulsed laser, power for a cw laser, laser beam diameter, mode condition, divergence, wavelength tuning range, etc. | |
