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  • Patent Protects 'Dicing' Technology for RGB Lasers
Dec 2007
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.

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
That branch of spectroscopy concerned with Raman spectra and used to provide a means of studying pure rotational, pure vibrational and rotation-vibration energy changes in the ground level of molecules. Raman spectroscopy is dependent on the collision of incident light quanta with the molecule, inducing the molecule to undergo the change.  
A cross-sectional slice cut from an ingot of either single-crystal, fused, polycrystalline or amorphous material that has refined surfaces either lapped or polished. Wafers are used either as substrates for electronic device manufacturing or as optics. Typically, they are made of silicon, quartz, gallium arsenide or indium phosphide.
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