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Single-frequency fiber lasers using rare-earth-doped silica

Single-frequency fiber lasers using rare-earth-doped silica

June 27, 2015: A single-frequency laser operates with only one longitudinal mode, and thus can emit quasi-monochromatic radiation with a very narrow linewidth and low noise. Such lasers, both in continuous waveform and pulsed operations, are of interest for interferometric sensing, coherent light detection and ranging, laser spectroscopy, and laser nonlinear frequency conversions. The distributed Bragg reflector (DBR) fiber laser ...

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Mitsubishi Electric to launch red laser diode for projectors

Mitsubishi Electric to launch red laser diode for projectors

June 25, 2015: Mitsubishi Electric Corporation announced today that it will launch a 638-nanometer-(nm)-wavelength red laser diode (LD) offering pulse operation output power of 2.5 W, the world?s highest level among 638-nm LDs used as light sources for projectors. Sales will begin this September 1. The 638-nm red laser light and highly efficient operation of the LD contributes to the ...

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4Gbps data rate with GaN laser diode demonstrated

4Gbps data rate with GaN laser diode demonstrated

June 13, 2015: A team of researchers from the University of California, Santa Barbara, has demonstrated a record 4Gbps data rate at room temperature with a commercial high power 450nm GaN laser diode. Visible light communication (VLC) is being considered to dramatically increase wireless data traffic constricted by limited available RF spectrum. Additional advantages include the broad range of available ...

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Ultrafast lasers create 3D crystal waveguides in glass

Ultrafast lasers create 3D crystal waveguides in glass

June 12, 2015: Researchers from Lehigh University, Japan and Canada have advanced a step closer to the dream of all-optical data transmission by building and demonstrating what they call the ?world?s first fully functioning single crystal waveguide in glass.? In an article published in Scientific Reports, a Nature publication, the group said it had employed ultrafast femtosecond lasers to produce ...

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Laser beam compressed into thin filament

Laser beam compressed into thin filament

June 2, 2015: A group of Russian scientists recently presented their research into the process of laser pulse filamentation?the effect produced when a laser beam propagating in air focuses into a filament. The researchers discovered how this process influences the preliminary transition of a beam passing through quartz glass, which has applications in the field of nonlinear optics. What is ...

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