Back to results
US 6,603,782 B2Granted
LD/PD module
AssigneeSumitomo Electric Industries, Ltd.
InventorsHiromi Nakanishi, Yoshiki Kuhara
Life of this patent
Estimating the term…
Abstract
An LD/PD module having a main silicon substrate having a cavity, a transmitting portion having an LD and an LD driving IC which is directly mounted upon the main silicon substrate, and a receiving portion having a PD and an amplifier which is indirectly mounted upon the main silicon substrate via an auxiliary insulating substrate embedded in the cavity. The auxiliary insulating substrate suppresses current-induced crosstalk from the transmitting portion to the receiving portion.
Claims24
An LD/PD module comprising:
- a main silicon substrate having a plateau and a cavity side by side;
- an auxiliary insulating substrate embedded in the cavity of the main silicon substrate;
- a transmitting portion including a laser diode (LD) and being mounted upon the plateau of the main silicon substrate;
- a receiving portion including a photodiode (PD) and being mounted upon the auxiliary insulating substrate;
- a transmitting light guide medium formed on the silicon substrate for guiding light signals from the LD to an external fiber;
- and
- a receiving light guide medium formed on the silicon substrate for guiding light signals from another external fiber to the PD.
4 more elements
Dependencies are inferred from the claim text.