| 摘要 |
To provide an optical module and optical transmission method that reduce tracking errors caused by position shifting of the focal point of light related to the optical axis direction, using a simpler method. A lens 1 causes light emitted from an emission point to be focused at a focal point. A lens cap 2 is provided on a stem 6 and supports the lens 1. A semiconductor laser 3 is provided on the stem 6 and emits light from a position corresponding to the emission point. A control member 7 controls position shifting of the focal point generated by thermal expansion of the lens cap 2, through thermal expansion in the direction of the optical axis of the lens 1. |
