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Patent Protects 'Dicing' Technology for RGB Lasers

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PD-LD Inc. of Pennington, N.J., announced that the US Patent and Trademark Office recently granted it a patent pertaining to its volume Bragg grating (VBG) technology, used in applications including Raman spectroscopy, high-power lasers and displays. Patent No. 7,125,632 protects a method of mass-producing VBG elements based on separating (or “dicing”) a VBG wafer into smaller identical elements with the same properties as the starting wafer. The technology will be used primarily in RGB (red, green, blue) lasers and display applications. PD-LD was previously granted two other VGB-based patents. The company manufactures fiber-coupled laser diodes, LEDs, detectors, high-power pulsed lasers and bidirectional devices for the optical communications, test equipment and medical industries.
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Published: December 2007
Glossary
nano
An SI prefix meaning one billionth (10-9). Nano can also be used to indicate the study of atoms, molecules and other structures and particles on the nanometer scale. Nano-optics (also referred to as nanophotonics), for example, is the study of how light and light-matter interactions behave on the nanometer scale. See nanophotonics.
photonics
The technology of generating and harnessing light and other forms of radiant energy whose quantum unit is the photon. The science includes light emission, transmission, deflection, amplification and detection by optical components and instruments, lasers and other light sources, fiber optics, electro-optical instrumentation, related hardware and electronics, and sophisticated systems. The range of applications of photonics extends from energy generation to detection to communications and...
raman spectroscopy
Raman spectroscopy is a technique used in analytical chemistry and physics to study vibrational, rotational, and other low-frequency modes in a system. Named after the Indian physicist Sir C.V. Raman who discovered the phenomenon in 1928, Raman spectroscopy provides information about molecular vibrations by measuring the inelastic scattering of monochromatic light. Here is a breakdown of the process: Incident light: A monochromatic (single wavelength) light, usually from a laser, is...
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