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High Reflectivity Mirrors
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Reflectivity：R＞99.999% @1550 ± 50 nm
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Substrate Material：Fused silica
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Substrate Surface quality: 0-0 S/D
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Optical loss （Absorption+Scatter）: ＜5 ppm
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HR-1064nm, HR-1550nm and custom wavelengths
Introduction
CASTECH designs and fabricates high reflectivity mirrors with high laser damage threshold for most demanding laser applications. We utilize super polishing and ion beam figure (IBF) technologies to prepare high-quality substrates. With multiple advanced coating systems and technologies, coupled with high accuracy total loss measurement based on Cavity-Ring-Down (CRD) and LDT measurement, we are able to deliver consistent high-quality mirrors featured not only high reflectivity, but high laser damage resistance and environmental stability.
Metrology
High reflectivity in the order of R = 99.9~99.999% are measured by Cavity-Ring-Down(CRD) technique CRD technique is a direct absorption technique based upon the measurement of the rate of absorption rather than the magnitude of absorption of a light pulse confined in a closed optical cavity with a high Q-factor. CRD measure instrument guarantees high reflectivity accuracy.
Cavity-Ring-Down (CRD) Technique
Reference Mirror: 0.999978 Reference Mirror: 0.999973
Calculated Reflectivity: 0.999951 +/- 0.000002 Calculated Reflectivity: 0.999955 +/- 0.000002
Reflectivity @532nm measured by CRD
Reflectivity @1064nm measured by CRD
Products
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High Reflectivity Mirrors
- CASTECH designs and fabricates high reflectivity mirrors ( best R>99.999% @ laser wavelength) with high laser damage threshold for most demanding laser applications.
-
-
Reflectivity：R＞99.999% @1550 ± 50 nm
-
Substrate Material：Fused silica
-
Substrate Surface quality: 0-0 S/D
-
Optical loss （Absorption+Scatter）: ＜5 ppm
-
HR-1064nm, HR-1550nm and custom wavelengths
Introduction
CASTECH designs and fabricates high reflectivity mirrors with high laser damage threshold for most demanding laser applications. We utilize super polishing and ion beam figure (IBF) technologies to prepare high-quality substrates. With multiple advanced coating systems and technologies, coupled with high accuracy total loss measurement based on Cavity-Ring-Down (CRD) and LDT measurement, we are able to deliver consistent high-quality mirrors featured not only high reflectivity, but high laser damage resistance and environmental stability.
Metrology
High reflectivity in the order of R = 99.9~99.999% are measured by Cavity-Ring-Down(CRD) technique CRD technique is a direct absorption technique based upon the measurement of the rate of absorption rather than the magnitude of absorption of a light pulse confined in a closed optical cavity with a high Q-factor. CRD measure instrument guarantees high reflectivity accuracy.
Cavity-Ring-Down (CRD) Technique
Reference Mirror: 0.999978 Reference Mirror: 0.999973
Calculated Reflectivity: 0.999951 +/- 0.000002 Calculated Reflectivity: 0.999955 +/- 0.000002
Reflectivity @532nm measured by CRD
Reflectivity @1064nm measured by CRD
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