Optical Semiconductor Module and Method for Assembling the Same
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United States of America Patent
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Issued Date -
Dec 15, 2011
app pub date -
Oct 9, 2009
filing date -
Oct 9, 2008
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Abstract
An optical semiconductor module in which displacement resulting from fixation of lenses is effectively corrected includes a first lens (102), a second lens (103), and a third lens (104) arranged between a semiconductor laser (101) and a semiconductor optical modulator (105). The first lens (102) and the second lens (103) form a collimate lens optical system. The first lens (102) converts light emitted by the semiconductor laser (101) into parallel light rays. The second lens (103) focuses the parallel light rays on the semiconductor optical modulator (105) to couple the light rays to the semiconductor optical modulator (105). The third lens (104) has a longer focal distance than the first and second lenses. Thus, displacement of the lenses resulting from fixation thereof can be corrected by adjusting in position and fixing the first and second lenses (102, 103) and then adjusting in position and fixing the third lens.
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