Mounting structure for optical module

Patent metadata

Field	Value
Publication number	US-11658457-B2
Application number	US-202016780856-A
Country	US
Kind code	B2
Filing date	Feb 3, 2020
Priority date	Feb 15, 2019
Publication date	May 23, 2023
Grant date	May 23, 2023

Abstract

A mounting structure for an optical module includes a light emitting element, a submount board on which the light emitting element is mounted, a main board on which the submount board is mounted, a light guide member provided on the main board, and a diffraction grating optical coupler provided on the main board and connected to the light guide member. The submount board and the main board are bonded to each other on a surface of the submount board different from a surface on which the light emitting element is mounted.

First claim

What is claimed is:

1. A mounting structure for an optical module, the mounting structure comprising:
a light emitting element;
a submount board having a first surface on which the light emitting element is mounted;
a main board on which the submount board is mounted;
a light guide member provided on the main board; and
a diffraction grating optical coupler provided on the main board and connected to the light guide member,
wherein a second surface of the submount board is fixed to the main board, the second surface being different from the first surface on which the light emitting element is mounted,
wherein an angle between a surface of the main board on which the diffraction grating optical coupler is mounted and the first surface of the submount board on which the light emitting element is mounted is 54.75°±5°, and
wherein an angle between the second surface of the submount board fixed to the main board and the first surface of the submount board on which the light emitting element is mounted is 54.75°±5°.

2. The mounting structure for an optical module of claim 1 , wherein the diffraction grating optical coupler is irradiated with light from the light emitting element.

3. The mounting structure for an optical module of claim 1 , wherein the submount board is made of silicon.

4. The mounting structure for an optical module of claim 3 , wherein the silicon is processed in a predetermined crystal orientation.

5. A mounting structure for an optical module of claim 1 , further comprising a spacer at a bonding portion between the main board and the submount board.

6. The mounting structure for an optical module of claim 5 , wherein a distance between the main board and the submount board is set to a predetermined value by the spacer.

7. The mounting structure for an optical module of claim 1 , further comprising:
a lens disposed between the light emitting element and the diffraction grating optical coupler.

8. The mounting structure for an optical module of claim 7 , wherein the lens is configured to stop light of the light emitting element and to transmit the light to the diffraction grating optical coupler.

9. The mounting structure for an optical module of claim 1 , further comprising:
a high refractive member disposed between the light emitting element and the diffraction grating optical coupler and having a high refractive index with respect to light from the light emitting element; and
a low refractive member having a lower refractive index than the high refractive member with respect to light from the light emitting element,
wherein the light emitting element and the diffraction grating optical coupler are connected with light by the high refractive member and the low refractive member.

10. The mounting structure for an optical module of claim 9 , wherein the high refractive member is located inside and the low refractive member is located outside the high refractive member.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Miyake Takahiro
• Inada Yasuhisa
• Wada Tosihiko

Classifications

• G02B5/18

  Diffraction gratings {(holographic optical elements G02B5/32, G03H; integrally combined with optical fibres G02B6/02057; for coupling light guides G02B6/34; integrally combined with optical integrated light guides G02B6/12; grating systems G02B27/44)} · CPC title

• G02B27/4233 Primary

  having a diffractive element [DOE] contributing to a non-imaging application (diffusers having a diffractive element G02B5/0252; filters having a diffractive element G02B5/203; systems for controlling the direction of light having diffractive elements G02B26/0808; scanning systems having diffractive elements G02B26/106; beam shaping systems using diffractive optical elements G02B27/0944; beam splitting or combining systems operating by diffraction G02B27/1086) · CPC title

• H01S5/0235

  Method for mounting laser chips · CPC title

• G02B6/4206

  Optical features (G02B6/4207, G02B6/421 take precedence) · CPC title

• G02B6/42

  Coupling light guides with opto-electronic elements · CPC title