发明名称 |
PHASE MASK FOR MACHINING OPTICAL FIBERS AND METHOD OF MANUFACTURING THE SAME |
摘要 |
<p>The invention relates to an optical fiber-processing phase mask which enables a phase mask with a groove pitch varying in a position-dependent manner to be easily obtained by electron beam writing, and its fabrication method. In the optical fiber-processing phase mask comprising on one surface of a transparent substrate a repetitive pattern of grooves (26) and strips (27) located in a grating form, so that an optical fiber is irradiated with diffracted light according to the repetitive pattern to make a diffraction grating in said optical fiber by an interference fringe of diffracted light of different orders, a plurality of patterns (A1 to A3) having a linearly or nonlinearly increasing or decreasing pitch are juxtaposed, with a constant width ratio between the grooves (26) and the strips (27). The phase mask is fabricated by carrying out writing while the groove-and-strip patterns with a different pitch are juxtaposed.</p> |
申请公布号 |
EP0940695(A1) |
申请公布日期 |
1999.09.08 |
申请号 |
EP19980929797 |
申请日期 |
1998.07.02 |
申请人 |
DAI NIPPON PRINTING CO., LTD. |
发明人 |
SEGAWA, TOSHIKAZU;KURIHARA, MASAAKI |
分类号 |
G02B5/18;G02B6/02;G03F1/26;G03F1/68;G03F1/80;G03F7/00;(IPC1-7):G02B5/18;G02B6/10;G03F1/08;G02B6/00 |
主分类号 |
G02B5/18 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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