Optical module having latching mechanism of cover with bush

Patent metadata

Field	Value
Publication number	US-9791646-B2
Application number	US-201314389700-A
Country	US
Kind code	B2
Filing date	May 22, 2013
Priority date	May 24, 2012
Publication date	Oct 17, 2017
Grant date	Oct 17, 2017

Abstract

An optical module with an improved coupling portion to couple an optical device with an external fiber is disclosed. The coupling portion includes a stub to secure a coupling fiber in a center thereof, a bush to support the stub, a sleeve to receive the stub in a portion thereof and an external ferrule in another portion, and a sleeve cover to cover the sleeve. The coupling portion further includes a latch put between the bush and the cover by being hooked with both the bush and the cover. The latch electrically isolates the bush from the cover even when the bush and the sleeve cover are made of metal.

First claim

The invention claimed is:

1. An optical module having an optical axis, comprising:
an optical device;
a stub that secures a coupling fiber optically coupled with the optical device, the stub having a first portion and a second portion disposed along the optical axis;
a metal bush having a first portion and a second portion disposed along the optical axis, the first portion of the metal bush receiving the first portion of the stub;
a sleeve inserted between the second portion of the stub and the second portion of the metal bush;
a metal sleeve cover that covers the sleeve and the second portion of the metal bush; and
a latch made of electrically insulating material and inserted between the metal bush and the metal sleeve cover thereby electrically isolating the metal sleeve cover from the metal bush, the latch having a first portion and a second portion disposed along the optical axis, the first portion of the latch being hooked with the metal bush and the second portion of the latch being hooked with the metal sleeve cover,
wherein the metal sleeve cover exposes the first portion of the latch.

2. The optical module of claim 1 ,
wherein the first portion of the metal bush has a flange in an outer surface thereof, and the first portion of the latch has a projection in an inner surface thereof, the projection of the latch being hooked with the flange of the metal bush.

3. The optical module of claim 1 ,
wherein the first portion of the metal bush has a projection in an outer surface thereof and the first portion of the latch has an opening, the projection of the metal bush being hooked with the opening of the latch.

4. The optical module of claim 1 ,
wherein the second portion of the latch provides a hook and the metal sleeve cover provides a step in an inner surface thereof, the hook of the latch being hooked with the step.

5. The optical module of claim 4 ,
wherein the latch in the second portion thereof further provides a post extending along the optical axis from a boundary between the first portion of the latch and the second portion of the latch, and
wherein the hook is provided in an end of the post and protrudes outwardly.

6. The optical module of claim 1 ,
wherein the second portion of the latch provides a hook and the metal sleeve cover provides a hole to which the hook of the latch is hooked.

7. The optical module of claim 1 ,
wherein the first portion of the latch provides a slit extending along the optical axis, the first portion of the latch being radially expandable.

8. An optical module having an optical axis and being installed within an optical transceiver, comprising:
an optical device that installs a laser diode therein, the optical device having a metal package;
a jointer having a metal cap and a cover, the metal cap covering the metal package and the metal cap including a ceiling and a skirt, the skirt receiving the metal cap therein; and
a coupling portion including,
a stub having a coupling fiber optically coupled with the laser diode in the optical device,
a metal bush having a first portion and a second portion disposed along the optical axis, the first portion supporting the stub, the metal bush being electrically connected with the metal package of the optical device,
a sleeve having a first portion and a second portion disposed along the optical axis, the first portion of the sleeve being inserted between the second portion of the stub and the second portion of the metal bush, the second portion of the sleeve receiving an external ferrule that optically couples with the coupling fiber in the stub,
a metal sleeve cover that covers the sleeve and the second portion of the metal bush, the metal sleeve cover being made of electrically conductive material, and
a latch made of electrically insulating material and inserted between the metal bush and the metal sleeve cover thereby electrically isolating the metal sleeve cover from the metal bush, the latch including a first portion and a second portion disposed along the optical axis, the first portion of the latch being hooked with the first portion of the metal bush and the second portion of the latch being hooked with the metal sleeve cover,

wherein the metal sleeve cover exposes the first portion of the latch.

9. The optical module of claim 8 ,
wherein the first portion of the metal bush provides a flange in an outer surface thereof, and the first portion of the latch provides a hook in an inner surface of the first portion thereof, and
wherein the hook of the latch is hooked with the flange of the metal bush.

10. The optical module of claim 8 ,
wherein the first portion of the metal bush provides a projection in an outer surface thereof, and the first portion of the latch provides an opening, and
wherein the projection of the metal bush is hooked with the opening of the latch.

11. The optical module of claim 8 ,
wherein the second portion of the latch provides a hook, and the metal sleeve cover provides a step in an inner surface thereof, and
wherein the hook of the latch is hooked with the step of the metal sleeve cover.

12. The optical module of claim 11 ,
wherein the latch provides a post with the hook in an end thereof.

13. The optical module of claim 8 ,
wherein the second portion of the latch provides a hook and the metal sleeve cover provides a hole, and
wherein the hook of the latch is hooked with the hole of the metal sleeve cover.

14. The optical module of claim 13 ,
wherein the second portion of the latch further provides a post extending along the optical axis from a boundary between the first portion of the latch and the second portion of the latch, and
wherein the hook is provided in an end of the post and protrudes outwardly.

15. The optical module of claim 8 ,
wherein the first portion of the latch provides a slit extending along the optical axis, the first portion of the latch being radially expandable.

Assignees

• Sedi Inc

Inventors

• Okada Takeshi

Classifications

• G02B6/421

  the intermediate optical component consisting of a short length of fibre, e.g. fibre stub · CPC title

• G02B6/4277

  Protection against electromagnetic interference [EMI], e.g. shielding means (shielding of electric apparatus H05K9/00, of instruments G12B17/00) · CPC title

• G02B6/4263 Primary

  of the transisitor outline [TO] can type · CPC title

• G02B6/4292

  the light guide being disconnectable from the opto-electronic element, e.g. mutually self aligning arrangements · CPC title