Subassembly and optical module

Abstract

A subassembly includes a supporting substrate having a V-shaped groove at which a member is disposed, a laser diode mounted at the supporting substrate, and a lens element. The lens element includes a lens portion formed at a surface of an optical substrate, a projection portion having a contour which places the projection portion in contact with the V-shaped groove at the supporting substrate when the lens element is mounted, and a rectangular handling portion having a groove on an upper surface thereof for identifying the lens formation surface, and the lens element is positioned relative to the laser diode. An optical module includes the subassembly, a package used to package the subassembly and an interface. The interface includes an optical fiber to be optically coupled with the laser diode via the lens element and is positioned as it comes in contact with the package.

1 . An optical module comprising: 
 a supporting substrate having a first groove at which a member is disposed;    an optical element mounted at said supporting substrate;    a lens element positioned relative to said optical element, said lens element including a lens portion formed at a surface of an optical substrate, a projection portion that comes in contact with said first groove at said supporting substrate when said lens element is mounted, and a rectangular handling portion extending in a direction orthogonal to a direction in which said first groove extends and having a second groove on an upper surface of said rectangular handling portion for identifying a surface of said lens element on which said lens portion is formed;    one or more package components used to package said supporting substrate mounted with said optical element and said lens element; and    an interface that includes an optical fiber to be optically coupled with said optical element via said lens element and is positioned as said interface comes in contact with said one or more package components.    
   
   
       2 . An optical module according to  claim 1 , wherein said lens portion is constituted of a diffractive optical element.  
   
   
       3 . An optical module according to  claim 1 , wherein the optical substrate is a silicon crystal substrate.  
   
   
       4 . An optical module according to  claim 1 , wherein said optical element is either a light emitting element or a light receiving element.  
   
   
       5 . An optical module according to  claim 1 , wherein said supporting substrate is held in an airtight space formed by said one or more package components.  
   
   
       6 . An optical module according to  claim 1 , wherein said one or more package components are coaxial package components.  
   
   
       7 . An optical module comprising; 
 a supporting substrate having a first groove at which a member is disposed;    an optical element mounted at said supporting substrate;    a lens element positioned relative to said optical element, said lens element including a lens portion formed at a surface of an optical substrate to cause a light flux to exit in a direction different from the direction of an incident light flux, a projection portion that comes in contact with said first groove at said supporting substrate when said lens element is mounted, and a rectangular handling portion extending in a direction orthogonal to a direction in which said first groove extends and having a second groove on an upper surface of said rectangular handling portion for identifying a surface of said lens element on which said lens portion is formed;    one or more package components used to package said supporting substrate mounted with said optical element and said lens element; and    an interface that includes an optical fiber, which is optically coupled with said optical element via said lens element and has a diagonal end surface, and is positioned as said interface comes in contact with said one or more package components.    
   
   
       8 . An optical module according to  claim 7 , wherein said lens portion is constituted of a diffractive optical element.  
   
   
       9 . An optical module according to  claim 7 , wherein the optical substrate is a silicon crystal substrate.  
   
   
       10 . An optical module according to  claim 7 , wherein said optical element is either a light emitting element or a light receiving element.  
   
   
       11 . An optical module according to  claim 7 , wherein said supporting substrate is held in an airtight space formed by said one or more package components.  
   
   
       12 . An optical module according to  claim 7 , wherein said one or more package components are coaxial package components.  
   
   
       13 . A subassembly comprising: 
 a supporting substrate having a first groove at which a member is disposed;    a lens element that is mounted at said supporting substrate, said lens element including a lens portion formed at a surface of an optical substrate, a projection portion which comes in contact with said first groove at said supporting substrate when said lens element is mounted, and a rectangular handling portion extending in a direction orthogonal to a direction in which said first groove extends and having a second groove on an upper surface of said rectangular handling portion for identifying a surface of said lens element on which said lens portion is formed; and    an isolator element that is mounted at said supporting substrate and has an isolator function.    
   
   
       14 . A subassembly according to  claim 13 , wherein said lens portion is constituted of a diffractive optical element.  
   
   
       15 . A subassembly according to  claim 13 , wherein the optical substrate is a silicon crystal substrate.  
   
   
       16 . A subassembly according to  claim 13 , wherein the section of said first groove at said supporting substrate is any of substantially V-shaped, substantially trapezoidal, substantially semicircular and substantially rectangular.  
   
   
       17 . A subassembly according to  claim 13 , wherein said projection portion has a circular arc shape.  
   
   
       18 . An optical module comprising: 
 a supporting substrate having a first groove at which a member is disposed;    a lens element that is mounted at said supporting substrate and includes a lens portion formed at a surface of an optical substrate, a projection portion which comes in contact with said first groove at said supporting substrate when said lens element is mounted, and a rectangular handling portion extending in a direction orthogonal to a direction in which said first groove extends and having a second groove on an upper surface of said rectangular handling portion for identifying a surface of said lens element on which said lens portion is formed;    an isolator element that is mounted at said supporting substrate and has an isolator function; and    a package component having a pedestal portion,    wherein said supporting substrate having said lens element and said isolator element mounted thereat is set at said pedestal portion.    
   
   
       19 . An optical module according to  claim 18 , further comprising a means for magnetic field application that is disposed at said pedestal portion and applies a magnetic field to said isolator element.  
   
   
       20 . An optical module according to  claim 18 , wherein said package component is a coaxial package component.  
   
   
       21 . An optical module comprising: 
 a supporting substrate having a first groove at which a member is disposed;    an optical element mounted at said supporting substrate;    a lens element positioned relative to said optical element, said lens element including a lens portion formed at a surface of an optical substrate, a projection portion that comes in contact with said first groove at said supporting substrate when said lens element is mounted, and a rectangular handling portion extending in a direction orthogonal to a direction in which said first groove extends and having a second groove on an upper surface of said rectangular handling portion for identifying a surface of said lens element on which said lens portion is formed;    an isolator element mounted at said supporting substrate and having an isolator function;    one or more package components used to package said supporting substrate mounted with said optical element, said lens element and said isolator element; and    an interface that includes an optical fiber to be optically coupled with said optical element via said lens element and is positioned as said interface comes in contact with said one or more package components.    
   
   
       22 . An optical module according to  claim 21 , further comprising a means for magnetic field application that applies a magnetic field to said isolator element.  
   
   
       23 . An optical module according to  claim 21 , wherein said optical element is either a light emitting element or a light receiving element.  
   
   
       24 . An optical module according to  claim 21 , wherein said supporting substrate is held in an airtight space formed by said one or more package components.  
   
   
       25 . An optical module according to  claim 21 , wherein said one or more package components are coaxial package components.