Granted Patent B2

US 12,189,140 · App. 17/430,799 · Granted Jan 7, 2025

Inventors: Jun Endo (Tokyo, JP); Kota Shikama (Tokyo, JP); Atsushi Aratake (Tokyo, JP)

Assignee: Nippon Telegraph and Telephone Corporation

G02B3/04G02B6/305G02B6/32

Abstract

Claims (290)

1. A lens structure body comprising:

a lens portion having a first refraction surface on an illuminant side and a second refraction surface on an emission side so as to be opposed to the first refraction surface, wherein:

the first refraction surface satisfies

z

=

z

c

-

r

b

⁢

1

⁢

1

-

(

y

r

a

⁢

1

)

2

z

c

=

l

a

+

r

b

⁢

1

⁢

1

-

(

0.5

D

r

a

⁢

1

)

2

1.6

D

<

r

a

⁢

1

<

2

.

1

⁢

D

6.

D

<

r

b

⁢

1

<

7

.4

D

;

 and

the second refraction surface satisfies

z

=

z

c

+

r

b

⁢

2

⁢

1

-

(

y

r

a

⁢

2

)

2

z

c

=

l

a

+

t

-

r

b

⁢

2

⁢

1

-

(

0.5

D

r

a

⁢

2

)

2

1.8

D

<

r

a

⁢

2

<

2.2

D

3.6

D

<

r

b

⁢

2

<

4.4

D

,

in which z represents a coordinate in a light propagation direction, y represents a coordinate in a height direction perpendicular to an optical axis of the lens portion, D represents a size of the lens portion in a height direction, l a represents a distance from a predetermined origin to an end of the first refraction surface in the light propagation direction, t represents a distance from the end of the first refraction surface to an end of the second refraction surface in the light propagation direction, r a1 represents a radius of the first refraction surface in the height direction, r b1 represents the radius of the first refraction surface in the light propagation direction, r a2 represents a radius of the second refraction surface in the height direction, and r b2 represents the radius of the second refraction surface in the light propagation direction.

2. The lens structure body according to claim 1 , further comprising a marker portion joined to at least one of the ends of the lens portion in a direction perpendicular to the optical axis.

3. The lens structure body according to claim 2 , wherein at least a part of the marker portion is coated with a contrast medium.

4. The lens structure body according to claim 1 , further comprising:

a substrate; and

a support member on the substrate and configured to support the lens portion so that the lens portion is arranged on the substrate at a distance.

5. An optical interconnection structure comprising:

a first waveguide;

a second waveguide receiving light from the first waveguide; and

a lens structure body arranged between an emission surface of the first waveguide and an incidence surface of the second waveguide, the lens structure body comprising:

a lens portion having a first refraction surface on an illuminant side and a second refraction surface on an emission side so as to be opposed to the first refraction surface;

a substrate; and

a support member on the substrate, the support member configured to support the lens portion so that the lens portion is arranged on the substrate at a distance;

wherein a first end face of the substrate of the lens structure body is in contact with an emission end face of the first waveguide, and a second end face of the substrate is in contact with an incidence end face of the second waveguide;

wherein the first refraction surface satisfies

z

=

z

c

-

r

b

⁢

1

⁢

1

-

(

y

r

a

⁢

1

)

2

z

c

=

l

a

+

r

b

⁢

1

⁢

1

-

(

0.5

D

r

a

⁢

1

)

2

1.6

D

<

r

a

⁢

1

<

2

.

1

⁢

D

6.

D

<

r

b

⁢

1

<

7

.4

D

;

wherein the second refraction surface satisfies

z

=

z

c

+

r

b

⁢

2

⁢

1

-

(

y

r

a

⁢

2

)

2

z

c

=

l

a

+

t

-

r

b

⁢

2

⁢

1

-

(

0.5

D

r

a

⁢

2

)

2

1.8

D

<

r

a

⁢

2

<

2.2

D

3.6

D

<

r

b

⁢

2

<

4.4

D

;

 and

wherein z represents a coordinate in a light propagation direction, y represents a coordinate in a height direction perpendicular to an optical axis of the lens portion, D represents a size of the lens portion in a height direction, l a represents a distance from a predetermined origin to an end of the first refraction surface in the light propagation direction, t represents a distance from the end of the first refraction surface to an end of the second refraction surface in the light propagation direction, r a1 represents a radius of the first refraction surface in the height direction, r b1 represents the radius of the first refraction surface in the light propagation direction, r a2 represents a radius of the second refraction surface in the height direction, and r b2 represents the radius of the second refraction surface in the light propagation direction.

6. The optical interconnection structure according to claim 5 , wherein the second waveguide has a mode field diameter larger than that of the first waveguide.

7. The optical interconnection structure according to claim 5 , further comprising a light transmissive member having a refractive index smaller than that of the lens portion, wherein a space between at least one of the first waveguide and the second waveguide and the lens portion of the lens structure body is filled with the light transmissive member.

8. The optical interconnection structure according to claim 7 , wherein the light transmissive member is a resin adhesive.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (11)