Method and apparatus for precision three-dimensional opto-mechanical assembly
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United States of America Patent
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Aug 27, 2002
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app pub date -
Feb 20, 2001
filing date -
Sep 20, 2000
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Abstract
A method for achieving three-dimensional alignment of a pair of optical components, and apparatus for supporting such method, is initiated by fixing one of the optical components at a selected location on a semiconductor substrate. Subsequently, the other optical component and its associated submount are attached to a pair of coupled motion stages. A reference signal, to which the first optical component has been aligned, is transmitted to the other component and to a detector. That detector is positioned to measure changes in a selected characteristic of the reference signal, such as changes in optical power, as the position of the second optical component and its submount are manipulated. Through the use of a feedback loop, the second component and submount are moved in a pattern until an optimal alignment is converged upon.
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