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AssigneeElectronics and Telecommunications Research Institute
InventorsMin-Kyu Song, Seung-Goo Kang, Hee-Tae Lee, Nam Hwang, Seong-Su Park, Dong-Goo Kim
Estimating the term…
The present invention relates to an accurate method using laser welding for mounting an optical focusing lens utilized in a semi-conductor laser module for optical transmission and optical amplification through an optical fiber and a laser module so produced. The laser module includes an aligned laser diode, a lens fixture mounting the laser diode, a focusing lens mounted within a lens housing which in turn is mounted by a lens ring to the lens fixture. In the method, the steps include aligning mutual positions between the laser diode and the optical focusing lens in the vertical and horizontal directions so that the magnitude of the optical signal output from the optical fiber is maximized after the distance between the optical focusing lens and the optical fiber is adjusted and fixed to obtain a maximum optical coupling efficiency between the laser diode and the optical fiber. Next a laser-welding step is performed at an interval between the lens housing and the lens ring. The mutual positions between the laser diode and the optical focusing lens are aligned in the vertical and horizontal directions so that the magnitude of the optical signal output from the optical fiber is maximized. Finally a laser-welding step is performed at an interval between the lens fixture and the lens ring.
A laser module with a focusing lens and a laser diode for generating an output optical signal in response to an electrical signal, an optical fiber for transmitting the optical signal output to an external circuit, an optical focusing lens disposed between the laser diode and the optical fiber to focus the optical signal output on the optical fiber, and a lens fixture having a lens housing hole for fixing the optical focusing lens, the laser module further comprising:
A method for attaching a focusing lens in a laser module that is comprised of a laser diode which generates an output optical signal, an optical fiber for transmitting the optical signal output to an external circuit, an optical focusing lens that is disposed between the laser diode and the optical fiber, a lens fixture having a lens housing holder for fixing the optical focusing lens, a lens housing for housing the optical focusing lens therein and a lens ring which is mounted to the outer surface of the lens housing, the method comprising the steps of:
Dependencies are inferred from the claim text.