Cadmium Selenide (CdSe) crystals from G&H offer excellent acousto-optic performance in the mid-IR range, ideal for modulation and deflection applications in infrared laser systems.
Full Product DescriptionCadmium Selenide (CdSe) is a II–VI semiconductor crystal used extensively in infrared optics and electro-optic applications. It has a wide transmission window (0.7–20 µm), excellent IR birefringence, and high damage thresholds. In addition to waveplates, CdSe is now a proven material in electro-optic modulators such as G&H’s CDX Series, expanding its utility into pulse slicing, Q-switching, and high-speed laser control.
Crystal boules also available, we cultivate and offer structurally flawless large boules devoid of defects, striations, or inclusions. Our boules boast an exceptionally low dislocation density, with sections entirely free of dislocations. With our oversized boules, we're capable of crafting exceptionally large optical elements.
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| Name | Value |
|---|---|
| Crystal Type | Cadmium Selenide (CdSe) |
| Crystal Structure | Hexagonal (wurtzite) |
| Point Group Structure | 6 |
| Band Gap | ~1.7 eV |
| Transparency Range | 0.7 – 20 µm |
| Refractive Range | ~2.43 @ 10.6 µm |
| Damage threshold | >3.5 J/cm² (2.94 µm, 100 ns, 3 Hz) |
| Wavefront distortion | < λ/10 @ 10.6 microns |
| Available Sizes | Custom crystal, 3-9 mm EO modulator aperture, Multi-order waveplates up to 29 mm |
