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Telecom Waveplates
Specifications：
| Material | Crystal Quartz |
| Diameter Tolerance | +0/-0.1mm |
| Design Wavelength | 1550nm |
| Retardance Accuracy | ＜λ/300 @ 1550nm |
| Surface Quality | 40/20 |
| Wavefront Distortion | λ/4 @ 632.8nm over the full aperture |
| Parallelism | ≤3″ |
| AR Coating | Both surfaces R＜0.25% @ 1525-1565nm |
| Damage Threshold | 500W/cm2,4J/cm2，20ns |
Order Information：
| WPT | ---- | 040 | ---- | 030 | ---- | 1/4 | ---- | W1550 |
| ↓ | ↓ | ↓ | ↓ | ↓ | ||||
| Product Code | Length=4.0mm | Width=3.0mm | Retardation=λ/4 | Wavelength "λ"=1550nm |
Types：
“1/4”means Quarter Waveplate
“1/2” means Half Waveplate
Also, please provide the angle θ.
Telecom waveplates are designed and manufactured specifically to meet the demanding requirements of telecom component designers.
CASTECH provides telecom waveplate with many kinds of sizes , they are 91.5μm thick for the half-waveplate and 45.7μm thick for the quarter-waveplate at 1550nm. The telecom waveplates are AR coated from 1525nm to 1565nm in order to minimize surface reflection losses.
Standard Telecom Waveplates：
| size | Design Wavelength | AR Coating | Retardation |
| Kinds of size | 1550nm | R＜0.25% @ 1525-1565nm | λ/4或λ/2 |
Note：Custom designs for other specifications and coating are also available upon request.
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