This invention relates to an alignment apparatus for aligning a planar optical wave-guide element and an optical fiber block wherein alignment can be completed with more precision and less expense than conventional methods. The alignment apparatus comprising a lower plate; a sliding table mounted on the lower plate capable of horizontal displacement on the lower plate; an upper plate mounted to the sliding table; and, a jig disposed on the upper plate and fixed to rotational means and capable of rotation about the upper plate for holding the optical fiber block.

 
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> Fused silica-based optical waveguide and method for its manufacture

> Dispersion compensating fiber for low slope transmission fiber and optical transmission line utilizing same

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