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US 7,116,859 B2Granted
Optical module and optical switch constituting the same
AssigneeNippon Telegraph and Telephone Corporation
InventorsShinji Mino, Takeshi Kitagawa, Motohaya Ishii, Takashi Yamada, Akira Himeno, Masayuki Okuno, Shunichi Souma, Takashi Goh
Life of this patent
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Abstract
An optical module controls its output characteristics electrically and an optical switch constitutes an optical module. An optical waveguide circuit (PLC) and an electronic circuit (IC) for driving the PLC are mounted on the same substrate. The IC is composed of a bare chip to be molded afterward. Wiring of the IC is grouped and integrated on the PLC substrate to achieve higher density and miniaturization of the optical module.
Claims6
A 1×N optical switch comprising:
- a two-port optical switch connected to an input waveguide, and capable of continuously adjusting its optical output intensity from a first output to a second output;
- a switch section including one or more two-port optical switches connected in cascade to the output(s) of said two-port optical switch, and having its outputs connected to N output waveguides, where N is an integer equal to or greater than three;
- a plurality of gate optical switches, each of which is connected to one of the output waveguides and capable of continuously adjusting its optical output from transmission to interruption;
- a switch driving power supply circuit for driving said two-port optical switches, all the two-port optical switches sharing said switch driving power supply circuit;
- a gate driving power supply circuit for driving said gate optical switches, all the gate optical switches sharing said gate driving power supply circuit;
- and
- electrical digital switches, each of which is connected to one of said two-port optical switches or said gate optical switches for interrupting a driving current from one of said driving power supply circuits.
4 more elements
Dependencies are inferred from the claim text.