Integrated Optical Transmission Board and Optical Module

Abstract

An integrated optical transmission board in accordance with one embodiment of the invention includes: a first optical transmission board having a first optical transmission line; a second optical transmission board having a second optical transmission line; and an optical coupling structure which is disposed between the first optical transmission board and the second optical transmission board and has a third optical transmission line for providing optical connection between the first optical transmission line and the second optical transmission line. The first optical transmission board further has a first engagement portion provided in an area thereof opposed to the optical coupling structure. The optical coupling structure further has a second engagement portion provided in an area thereof opposed to the first optical transmission board so as to make engagement with the first engagement portion.

1 - 11 . (canceled) 
     
     
         12 . An integrated optical transmission board, comprising:
 a first optical transmission board comprising a first optical transmission line;   a second optical transmission board comprising a second optical transmission line;   an optical coupling structure which is disposed between the first optical transmission board and the second optical transmission board, and is optically connected with the first optical transmission line and the second optical transmission line; and   a mounting portion which is interposed between the first optical transmission board and the second optical transmission board, is located outside the optical coupling structure, and fixed to the first optical transmission board and the second optical transmission board.   
     
     
         13 . The integrated optical transmission board according to  claim 12 , wherein the optical coupling structure comprise epoxy resin. 
     
     
         14 . The integrated optical transmission board according to  claim 12 , wherein the optical coupling structure is located on the first optical transmission board. 
     
     
         15 . The integrated optical transmission board according to  claim 12 , wherein the optical coupling structure is fixed to the second optical transmission board. 
     
     
         16 . The integrated optical transmission board according to  claim 12 , wherein the optical coupling structure further comprises a third optical transmission line which is
 optically connected with the first optical transmission line and the second optical transmission line.   
     
     
         17 . The integrated optical transmission board according to  claim 16 , wherein the third optical transmission line is located continuously with the second optical transmission line. 
     
     
         18 . The integrated optical transmission board according to  claim 12 , wherein the first optical transmission board comprises a first engagement portion in an area thereof opposing to the optical coupling structure, and
 the optical coupling structure further comprises a second engagement portion which is in an area thereof opposing to the first optical transmission board and is configured to engage with the first engagement portion.   
     
     
         19 . The integrated optical transmission board according to  claim 18 , wherein there is a space between the first engagement portion and the second engagement portion. 
     
     
         20 . The integrated optical transmission board according to  claim 18 , wherein the first engagement portion and the second engagement portion comprise a combination of a projection and a cavity. 
     
     
         21 . The integrated optical transmission board according to  claim 12 , wherein the second optical transmission board further comprises a third engagement portion in an area thereof opposing to the optical coupling structure, and
 the optical coupling structure further comprises a fourth engagement portion in an area thereof opposing to the second optical transmission board, the fourth engagement portion engaging the third engagement portion.   
     
     
         22 . An optical module, comprising:
 the integrated optical transmission board according to  claim 12 ; and   an optical semiconductor device which is optically connected to the second optical transmission line, and is mounted on the second optical transmission board so as to face the optical coupling structure through the second optical transmission board.