| http://www.w3.org/ns/prov#value | - In some embodiments, the present invention provides an apparatus including an optical amplifier having a segmented photonic-crystal fiber (PCF) that includes a first amplifying segment having a rare-earth-doped photonic-crystal core and a second amplifying segment having a rare-earth-doped photonic-crystal core, a master oscillator operable to generate a seed-laser signal, and a first optical conn
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