Depending on the application, high reflectivity offers advantages for laser processes, such as more efficient use of laser power due to lower losses in the system or in the laser. In the new cavity ring-down (CRD) measurement station from Laser Components, pulsed laser light is injected into a passive optical resonator. After each cycle, the power of the transmitted light is measured to determine the optical quality of the resonator. Laser Components uses an A-Cube from its own production for this purpose.The CRD measuring station is designed for the wavelengths 1064 nm, 532 nm and 355 nm and measures the reflectivity for angles of incidence of 0° and 45°.
The laser used delivers a pulse energy of up to 140 µJ for a pulse duration of 1 ns, providing higher accuracy compared to other CRD measurement stations. "Previously, we could only calculate the reflectivity of optics from the results of transmission measurements," says Barbara Herdt, head of the laser optics business unit. "With this, we could only guarantee values up to 99.9% perfectly. Now we can provide our customers with proof that their custom optics have the desired reflectivity."
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