PHOTONIC BAND GAP FIBER

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PROBLEM TO BE SOLVED : To provide a photonic band gap fiber which is enhanced in efficiency by suppressing spontaneous emission light and is especially suitable for optical fiber amplifier, fiber laser, etc. SOLUTION : The photonic band gap fiber comprises a solid-core linear core doped with rare earth elements and a clad portion which consists of photonic band gap structures, and each of which is a linear hole that extends in parallel with the core portion, and which are arranged in a lattice form around the core portion. COPYRIGHT : (C)2007, JPO&INPIT