| 摘要 |
An optical fiber modulator comprises an optical fiber, a substrate having a groove pattern in which the optical fiber is fixed, and a modulation unit including a polarizer, an electrooptic element, and an analyzer aligned in a light path of the optical fiber in this order, wherein the electrooptic element is made of a poled portion of the optical fiber, and when the electrooptic element is in an electric field-free condition, an absolute value, delta , of a phase difference of a beam passed through the electrooptic element is within the following range(m/2-+E,fra 1/6+EE ) pi </= delta </=(m/2++E,fra 1/6+EE ) pi wherein m is an odd number. When the portion of the optical fiber is poled from two different directions, the modulation unit should further include a wave plate, and an absolute value, delta 1, of a phase difference of a beam passed through the wave plate and the electrooptic element is within the following range of (n/2-+E,fra 1/6+EE ) pi </= delta </=(n/2++E,fra 1/6+EE ) pi wherein n is an odd number. Methods for making the modulators are also described.
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| 申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
MINEMOTO, HISASHI;ITOH, NOBUKI;ISHIKO, DAISUKE;ISHIZUKA, SATOSHI |
