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Photonic Crystal Fiber Laser Has Low Threshold, High Efficiency

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Breck Hitz

Lasers based on photonic crystal fibers offer the laser designer novel degrees of freedom not available in conventional fiber lasers. Although the latter are restricted to single-mode oscillation only if the core is small enough, photonic crystal fibers can be "endlessly single mode"; that is, capable of supporting only a single transverse mode in an arbitrarily large core. Thus, both the pump and laser wavelength can be single-mode in the fiber, allowing greater spatial overlap between the two than can be achieved easily in conventional fiber lasers. Also, photonic crystal fibers allow...Read full article

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