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Sensing & Measurement

Ultra-low absorption thin film coatings

Precision Photonics

Precision Photonics Corp (PPC) announces the availability of its ultra-low absorption line of thin film coatings. Enabled by advanced in-house metrology and expertise in ion beam sputtered (IBS) deposition, PPC is able to routinely deliver anti-reflection (AR) coatings with losses less than 0.5ppm, and high-reflection (HR) coatings with losses less than 2ppm.

This unique PPC capability is based on photothermal common path interferometry, and when combined with proprietary calibration methods, results in measurement sensitivity of less than 0.1ppm for optical materials like fused silica. In addition to verification of in-house IBS coatings, PPC will also provide measurement services to customers wishing to measure absorption in their own coatings or substrates. Two dimensional mapping of surfaces is also available.

PPC primarily utilizes this measurement tool to advance continual process improvement of its own IBS thin film optical coatings. The combination of extreme durability, high reliability, precision spectral control, and high laser damage threshold makes ion beam sputtering the coating method of choice for high power laser applications and low loss optics.

PPC will be presenting its latest work on ultra-low absorption coatings on 26 January at Photonics West 2012 in San Francisco, CA.