Optical module

Patent metadata

Field	Value
Publication number	US-10558063-B2
Application number	US-201615223594-A
Country	US
Kind code	B2
Filing date	Jul 29, 2016
Priority date	Feb 14, 2014
Publication date	Feb 11, 2020
Grant date	Feb 11, 2020

Abstract

An optical module includes an optical element configured to be driven at a high frequency, a circuit board arranged at a height different from a height of the optical element, and a wiring sub-mount including a wiring electrically connecting the optical element and the circuit board, the wiring being such that a height of a connection surface of one end portion of the wiring and a height of a connection surface of another end portion of the wiring are different from each other.

First claim

What is claimed is:

1. An optical module comprising:
an optical path formed by a laser light source, a wavelength locker, a semiconductor optical modulator configured to be driven at a high frequency, and a polarization combiner;
a circuit board arranged at a height higher than a height of the optical path;
a wiring sub-mount including a wiring electrically connecting the optical element to the circuit board, such that a height of a connection surface of one end portion of the wiring connected to the circuit board is higher than a height of a connection surface of another end portion of the wiring connected to the optical element; and
a housing,
wherein the optical path, the circuit board, and the wiring sub-mount are arranged in a continuous space defined by the housing.

2. The optical module according to claim 1 , wherein
the wiring includes
a first wiring portion extending in a direction parallel to a surface where the semiconductor optical modulator is mounted, and
a second wiring portion connected to the first wiring portion and extending in a direction crossing the surface where the semiconductor optical modulator is mounted.

3. The optical module according to claim 2 , wherein
a curved surface is formed on a connection between the first wiring portion and the second wiring portion of the wiring.

4. The optical module according to claim 1 , further comprising:
a wiring board electrically connecting the wiring sub-mount to the circuit board.

5. The optical module according to claim 4 , wherein
the wiring board includes microstrip lines including a signal wiring formed on one surface of a substrate and a ground wiring formed on another surface of the substrate,
the signal wiring includes a connection electrode provided at each of connections to the wiring sub-mount and the circuit board, and
the ground wiring and the connection electrode are arranged such that a distance to the ground wiring from an end of the wiring board in a wiring direction is equal to or greater than a distance to the connection electrode from the end of the wiring board.

6. The optical module according to claim 4 , wherein
the wiring sub-mount, the circuit board, and the wiring board are an integrated structure.

7. The optical module according to claim 1 , wherein
the wiring sub-mount and the circuit board are electrically connected by a wire.

8. The optical module according to claim 1 ,
wherein the optical path is arranged to form a U-shape.

9. The optical module according to claim 1 , wherein
the wiring sub-mount is a laminated board.

10. The optical module according to claim 1 , wherein
the circuit board includes a termination resistor.

11. The optical module according to claim 1 , wherein the housing has a length of not more than 80 mm and a width of not more than 20 mm.

Assignees

• Furukawa Electric Co Ltd

Inventors

• Sugaya Toshio
• Ariga Maiko

Classifications

• G02F1/015 Primary

  based on semiconductor elements having potential barriers, e.g. having a PN or PIN junction (G02F1/03 takes precedence) · CPC title

• G02B6/4274

  Electrical aspects (G02B6/4263 and G02B6/4265 take precedence) · CPC title

• G02F1/0344

  controlled by a high-frequency electromagnetic wave component in an electric waveguide (G02F1/0356, G02F1/05, G02F1/2255, G02F1/3134 take precedence) · CPC title

• G02B6/42

  Coupling light guides with opto-electronic elements · CPC title

• G02B6/12004

  Combinations of two or more optical elements · CPC title