High Power Polarizing Cube Beamsplitters
- Optical Material: UV fused silica, BK-7
- Surface Quality: 10-5 for UV fused silica, 20-10 for BK-7
- Transmitted Wavefront Error: λ/4 @ 633nm
- Clear Aperture: ≥ 85% of central dimension
- Anti-reflection coating: R ≤ 0.25% on all leg sides
- Field of view: ± 3°
- Extinction Ratio:
> OC version: Tp/Ts > 1000:1 for λ > 450nm, Tp/Ts > 500:1 for λ ≤ 450nm
> MF version: Tp/Ts > 5000:1 for λ > 450nm, Tp/Ts > 3000:1 for λ ≤ 450nm
- Reflection: Rs > 99.9% for λ > 450nm, Rs > 99.5% for λ ≤ 450nm
- Transmission: Tp > 90% for optical cement, Tp > 95% for molecular fusion
- Damage Threshold:
> Optical Cement: 1 J/cm2, 20ns, 20Hz @ 1064nm; 100 W/cm2, CW @ 515nm
> Molecular FusionTM: > 10 J/cm2, 20ns, 20Hz @ 1064nm; 1 MW/cm2, CW @ 1064nm
Cube beamsplitters consist of two right angle prisms with a special dielectric coating on the interface. They offer the flexibility of a large range of coating types and different trade-offs between cost and power handling capability, as well as the convenience of near-zero beam deviation and right-angle splitting. Especially polarizing cube beamsplitters are used to split a laser beam into two orthogonally polarized components or combine them into one beam. The P-polarization is transmitted straight through and the S-polarization is reflected at 90°. For lower power applications, the cubes are assembled from coated 90° angle prisms cemented together using index-matching transparent adhesives to avoid interface losses and provide a strong, stable part. In general, it can be used up to 1 J/cm2 at 1064 nm. The input light beam has to come into the coated side first, which is marked on the cube. Optically contacted cubes have much higher damage thresholds and wide wavelength response, with better beam quality since the index inhomogeneity of the optical cement is not present to degrade wavefront accuracy in the transmitted beam. However, they are more expensive and are not generally as stable mechanically, due to the fragile nature of the optically contacted interface. The new Spectral Optics Molecular Fusion™ bonding technology creates optically contacted units that are permanently bonded, with no cement or other substances to degrade coating performance.
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Optical Cement: [PCBS-OC]-[λ]-[Size]-[Material] |
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|---|---|---|---|---|
PCBS-OC |
λ (nm) |
Size Code |
Material |
Price (USD) |
| [PCBS-OC] |
Standard Wavelengths: [670], [780], [800], [850], [980], [1030], [1064], and [1550] |
[050] (0.5") |
[FS] | Listed λ: $495 (< 350nm) $445 (< 450nm) $395 (≥ 450nm) Other λ: $595(< 350nm) $525 (< 450nm) $475 (≥ 450nm) |
| [BK] | Listed λ: $250 (< 450nm) $200 (≥ 450nm) Other λ: $325 (< 450nm) $275 (≥ 450nm) |
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| [100] (1.0") |
[FS] | Listed λ: $580 (< 350nm) $555 (< 450nm) $495 (≥ 450nm) Other λ: $700 (< 350nm) $675 (< 450nm) $615 (≥ 450nm) |
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| [BK] | Listed λ: $300 (< 450nm) $250 (≥ 450nm) Other λ: $425 (< 450nm) $365 (≥ 450nm) |
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Molecular Fusion: [PCBS-MF]-[λ]-[Size]-[Material] |
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|---|---|---|---|---|
PCBS-MF |
λ (nm) |
Size Code |
Material |
Price (USD) |
| [PCBS-MF] |
Standard Wavelengths:
|
[050] (0.5") |
[FS] | Listed λ: $900 (< 350nm) $775 (< 450nm) $650 (≥ 450nm) Other λ: $1100 (< 350nm) $975 (< 450nm) $850 (≥ 450nm) |
| [BK] | Listed λ: $450 (≥ 400nm) Other λ: $650 (≥ 400nm) |
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| [100] (1.0") |
[FS] | Listed λ: $1250 (< 350nm) $1100 (< 450nm) $950 (≥ 450nm) Other λ: $1550 (< 350nm) $1400 (< 450nm) $1250 (≥ 450nm) |
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| [BK] | Listed λ: $750 (≥ 400nm) Other λ: $950 (≥ 400nm) |
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Example: PCBS-MF-1064-050-FS
Polarized Cube Beamsplitter + Molecular Fusion bonding +1064nm + 0.5" size + Fused Silica
NOTE:
1. The selection of the substrate material is dependent on the wavelength. Below 450nm, the UV fused silica is recommended.
2. Any other wavelength can be supplied on request.3. There could be some "minimum order quantity" in the case of custom wavelength. Please check it with us.
4. Please describe your custom requirements when you contact us.