Ceramic Reflector (Ceramic Diffuse Reflector)
Ceramic reflectors are recently used in laser pump chambers. Its main advantages are long life time.
A porous alumina ceramic of99.7% Al2O3content, used extensively for long-life laser reflectors. This material is sintered at high temperatures to achieve a controlled porosity.
Typical applications Pumping chambers for Nd:YAG lasers — low to high power, single or multiple lamp designs. Pumping chamber reflectors of this material are virtually indestructible, and prove a highly cost effective alternative to metal coated types.
Surfaces can be sealed and coated with a solarization-resistant glaze to give high bulk refectivity
97.8% reflectance efficiency at 1000nm
Reflectance efficiency exceeds 96% across the wavelength range 500-2000nm(see curve)
Good thermal conductivity
High electrical resistivity
Quality Assurance to BS EN 9001:2000
Components up to 250mm long and 80mm wide/diameter manufactured as standard
Larger components manufactured to development contracts
One-piece or split-cavity designs
Prototype, batch and volume production.
Bulk density (fired), Mg/m3 :3.2
Porosity (apparent), % nominal:20
Flexural strength (ASTM C1161, 3-point), MPa:150
Thermal expansion coefficient
200-500C, 10-6/C 7.9
(Efficiency:Wavelength, from independent tests carried out at the UK's National Physical Laboratory)