| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a device and method for accurately and speedily adjusting an optical axis for adjusting an angular shift especially between the connection interfaces by active alignment at the time of optical coupling between optical elements, and thereby realizing simplification of the configuration and decrease of a coupling loss. <P>SOLUTION: When coupling a coated optical fiber (11) to a waveguide type optical element (12), a position of a connection interface (12A) is firstly determined by the active alignment as an aligned position when a maximum optical output (I<SB>0</SB>) can be obtained from the wavguide type optical element (12). Next, the connection interface (12A) of the waveguide type optical element (12) is shifted in parallel in the direction of the axis X<SB>0</SB>from the aligned position by +Δx, and an optical output (I<SB>1</SB>) then is defined as the 1st optical power. Further, the connection interface (12A) of the waveguide type optical element (12) is shifted in parallel in the direction of the axis X<SB>0</SB>from the aligned position by -Δx, and an optical output (I<SB>2</SB>) then is defined as the 2nd optical power. An angular shift amountβabout the axis Y<SB>0</SB>is obtained based on the ratio of the 1st optical power (I<SB>1</SB>) to the 2nd optical power (I<SB>2</SB>), and then the connection interface (12A) of the waveguide type optical element (12) is turned about the axis Y<SB>0</SB>by the angular shift mountβ. <P>COPYRIGHT: (C)2004,JPO</p> |
