OPTICAL WAVE CIRCULATOR CONSTITUTED OF OPTICAL MAGNETIC MATERIAL CYLINDER AND OPTICAL FIBER,申请号JP19810114047-传众专利搜索

OPTICAL WAVE CIRCULATOR CONSTITUTED OF OPTICAL MAGNETIC MATERIAL CYLINDER AND OPTICAL FIBER

申请公布号：JPS5814820(A)

申请号：JP19810114047

申请日期：1981.07.21

申请公布日期：1983.01.27

申请人：

NAGAO TSUKASA

发明人：NAGAO TSUKASA

分类号：G02B6/00;G02B6/28;G02B27/10;G02F1/09;G02F1/095

主分类号：G02B6/00

摘要：PURPOSE:To realize an optical circulator which is small-sized, small in its number of elements and stable with high efficiency, by providing 3 openings in a rotation symmetrical form on one end of an optical magnetic material cylinder showing optical anisotropy, and directly coupling an optical fiber to said end. CONSTITUTION:As for an optical magnetic material cylinder showing optical anisotropy, single crystal (YIG) of iron yttrium garnet is worked, end faces 13, 14 are specularly polished, a reflection film is attached to the end face 13, 3 openings 11-11'' are provided symmetrically in the rotation on the end face 14, and optical fibers 12-12'' are coupled. An incident signal optical wave energizes a transmission wave having a left and right rotation component in the YIG, the transmission wave contains a lot of components of a volume wave since the optical fibers are provided symmetrically in the rotation, goes and returns between the end faces 13, 14, a composite wave is formed, at least the following bipolar composite wave is rotated in the full line direction from the broken line in the figure, in a deviation DC magnetic field, is outputted from the optical fiber 12 to 12', a circulator operation is realized, and in case of other optical fibers, said process is executed in the same way.