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Read Laser Focus World Magazine, May 2009 Online

Features
PHOTONICS APPLIED: PHOTOVOLTAICS: A sunny outlook for lasers in solar
Changes in solar supply-demand dynamics, coupled with new tooling requirements for next-generation photovoltaics, are likely to increase adoption rates of lasers used in production of solar cells and thin-film panels.

RAMAN SPECTROSCOPY: CARS microscopy peers deep into microstructures
Compared to scanning-electron microscopy, CARS microscopy produces a richer data set and is more conducive to in situ testing of microstructures created using two-photon polymerization, offering an alternative inspection method.

ORGANIC EMITTERS: OLEDs enable integrated surface-plasmon-resonance sensor
Organic light-emitting diodes offer much more than displays and lighting: they are perfectly suited as integrated light sources for many sensing applications.

SINGLE-PHOTON SOURCES: Quantum dots may hold the key to secure quantum cryptography
Quantum-dot-based single-photon sources are fast and efficient and remain at the forefront of candidates for use in quantum information schemes.

ILLUMINATION OPTICS: Köhler integration optics improve illumination homogeneity
Formed by a combination of reflective and/or refractive surfaces and organized in corresponding pairs, a Köhler integrator can be superimposed onto designed optical surfaces to improve optical-system performance of light-emitting-diode-based illuminators.

TERAHERTZ IMAGING: Standard software optimizes terahertz imaging
Contrary to popular belief, off-the-shelf software can indeed tackle the unusual requirements of terahertz imaging—and in the process of optimizing such systems, help push terahertz technology toward industrial application.

PHOTONIC FRONTIERS: OPTICAL CLOCKS: Optical clocks set the pace in accurate timekeeping
The best optical clocks can already beat the best cesium atomic clocks for cutting-edge laboratory measurements; the next challenge is to develop more practical versions for applications such as precision navigation.

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