Light transmitting/receiving module
AssigneesSumitomo Electric Industries, Ltd., NHK Spring Co., Ltd.
InventorsHiromi Nakanishi, Yoshiki Kuhara
Life of this patent
Estimating the term…
Abstract
Simultaneous bidirectional transmission type LD/PD module having a substrate, a signal transmitting part mounted on the substrate, a signal receiving part formed on the substrate, an end of a fiber communicating with a base station, a light waveguide coupling the fiber to the transmitting part and the receiving part, a filter separating the receiving signal light from the transmitting signal light and a resin mold package containing the substrate, the transmitting part, the receiving part, the filter and the lead frame. The receiving part is electromagnetically shielded with multihole metal members from the noise generated by the transmitting part. The resin penetrates through the holes and fully covers the receiving part.
Claims32
A light transmitting/receiving module comprising:
- a substrate;
- patterns metallized on the substrate;
- a transmitting part including a light source and being made on the substrate;
- a receiving part including a photodetector and a ground and being made on the substrate;
- a light propagating medium provided on the substrate;
- at least one light waveguide for allowing transmitting light and receiving light to propagate and for coupling the light propagating medium to the transmitting part and the receiving part;
- a filter mounted on the waveguide or an optical coupler constructed in the waveguide for separating the receiving light from the transmitting light;
- and
- a metal shielding member having holes or opening sides for covering at least a part of the receiving part and being connected to the ground of the receiving part.
Dependencies are inferred from the claim text.