Optical-waveguide-element module

Patent metadata

Field	Value
Publication number	US-9335570-B2
Application number	US-201214369511-A
Country	US
Kind code	B2
Filing date	Dec 28, 2012
Priority date	Dec 28, 2011
Publication date	May 10, 2016
Grant date	May 10, 2016

Abstract

An object of the present invention is to provide an optical waveguide element module where the bonding wires can be prevented from disengaging or disconnecting so as to provide high reliability. Another object is to provide an optical waveguide element module that can be made compact and where an increase in the manufacturing cost can be minimized. An optical waveguide element module having: a waveguide substrate 1 on which an optical waveguide (not shown) and control electrodes (E 1 to E 4 ) for controlling light waves that propagate through the optical waveguide are formed; external substrates ( 21 to 24 ) having wire circuits (TM 1 , C 1 ), which are connected to control electrodes electrically, disposed proximity to the waveguide substrate; a housing 3 in which the external substrate and the waveguide substrate are arranged; and terminals (T 21 to T 24 ) which are connected to an external electric circuit (not shown) for supplying electrical signals to the control electrode or deriving electrical signals from the control electrode provided with the housing, wherein relay electrode pads (CP 1 , CP 4 ) which are electrically isolated from both of the wiring circuit and the control electrode are formed in any portion of the waveguide substrate 1 and the external substrates ( 21 to 24 ), and at least one bonding wire (W 21 , W 22 , W 41 , W 42 ) is connected from a control electrode to the terminal or from the wire circuit to the terminal via the relay electrode pad.

First claim

The invention claimed is:

1. An optical waveguide element module, comprising:
a waveguide substrate on which an optical waveguide and control electrodes for controlling light waves that propagate through the optical waveguide are formed;
an external substrate having a wire circuit, said wire circuit being connected to a control electrode electrically, disposed in proximity to the waveguide substrate;
a housing in which the external substrate and the waveguide substrate are arranged; and
a terminal which is connected to an external electrical circuit for supplying electrical signals to the control electrode or deriving electrical signals from the control electrode provided with the housing, wherein
a relay electrode pad which is electrically isolated from both of the wiring circuit and the control electrode and is used only for relaying a bonding wire, is formed in any portion of at least one of the waveguide substrate and the external substrate, and
at least one bonding wire is connected from a control electrode to the terminal or from the wire circuit to the terminal via the relay electrode pad.

2. The optical waveguide element module according to claim 1 , wherein the bonding wire connected via the relay electrode pad is a wire for supplying a low frequency signal or a DC signal to the control electrode.

3. The optical waveguide element module according to claim 1 , wherein the external substrate is a relay substrate for supplying a high-frequency signal to a control electrode, or a termination substrate for terminating a high-frequency signal derived from a control electrode.

4. The optical waveguide element module according to claim 1 , wherein the optical waveguide is provided with at least two or more integrated Mach-Zehnder type optical waveguides.

5. The optical waveguide element module according to claim 2 , wherein
the external substrate is a termination substrate,
a wire circuit of the termination substrate is provided with a circuit for supplying a low frequency signal for bias control, or a DC signal of a bias voltage, to the control electrode, and
a wire for supplying the low frequency signal or the DC signal is a bonding wire connected via the relay electrode pad which is provided on the waveguide substrate or on another external substrate.

6. The optical waveguide element module according to claim 2 , wherein the external substrate is a relay substrate for supplying a high-frequency signal to a control electrode, or a termination substrate for terminating a high-frequency signal derived from a control electrode.

7. The optical waveguide element module according to claim 2 , wherein the optical waveguide is provided with at least two or more integrated Mach-Zehnder type optical waveguides.

8. The optical waveguide element module according to claim 3 , wherein the optical waveguide is provided with at least two or more integrated Mach-Zehnder type optical waveguides.

9. The optical waveguide element module according to claim 5 , wherein the optical waveguide is provided with at least two or more integrated Mach-Zehnder type optical waveguides.

10. The optical waveguide element module according to claim 6 , wherein the optical waveguide is provided with at least two or more integrated Mach-Zehnder type optical waveguides.

Assignees

• Sumitomo Osaka Cement Co Ltd

Inventors

• Katou Kei
• Miyazaki Norikazu

Classifications

• G02F2001/212

  Physics · mapped topic

• G02F1/0121 Primary

  Operation of devices; Circuit arrangements, not otherwise provided for in this subclass · CPC title

• G02F1/035 Primary

  in an optical waveguide structure · CPC title

• G02F1/2255

  controlled by a high-frequency electromagnetic component in an electric waveguide structure · CPC title

• G02F1/225

  in an optical waveguide structure · CPC title