Optical component and method of manufacturing the same
An optical component is provided for optical communication and has a smaller size and a shorter height. The optical component involves a concave package provided by layering ceramic substrates, a groove section formed at a bottom face of this package, an optical semiconductor element provided in this groove section, a cover provided to cover an opening section of the package and a lens formed at the cover.
1. An optical component, comprising:
a concave package including layered ceramic substrates;
a groove section formed at a bottom face of the package;
an optical semiconductor element housed in the groove section;
a cover arranged to cover an opening section of the package;
a lens formed at the cover;
a fixed substrate housed in the package and fixing the optical semiconductor element to the groove section; and
a ball lens fixed to a window of the fixed substrate,
wherein the thickness of the fixed substrate can be changed depending on an optical path.
2. A method for manufacturing an optical component, wherein the optical component comprises:
a concave package,
a groove section formed at a bottom face of the package,
an optical semiconductor element housed in the groove section,
a cover for covering an opening section of the package,
a lens formed in the cover,
a fixed substrate that is housed in the package and that has a window, and
a ball lens fixed to the window of the fixed substrate,
wherein the method comprises:
adjusting a distance from the ball lens to the optical semiconductor element; and
wherein the distance is adjusted by controlling the thickness of the fixed substrate.
3. An optical component, comprising:
a concave package including layered ceramic substrates;
a groove section formed at a bottom face of the package;
an optical semiconductor element housed in the groove section;
a cover arranged to cover an opening section of the package;
a lens formed at the cover;
a fixed substrate housed in the package and fixing the optical semiconductor element to the groove section; and
a window having a shape that is smaller than an outer shape of the optical semiconductor element and that is larger than the size of a light-receiving section or a light-emitting section of the optical semiconductor element.
4. The optical component according to claims 3 , further comprising:
an electrode provided at a bottom face of the package;
an electrode of the optical semiconductor element; and
a wiring of the fixed substrate,
wherein the wiring of the fixed substrate connects the electrode of the optical semiconductor element to the electrode provided at a bottom face in the package.
5. The optical component according to claim 3 , further comprising:
interlayer wirings sandwiched by the layered ceramic substrates;
a through hole electrode formed in the ceramic substrates to connect the interlayer wirings to each other; and
an external electrode provided at least at an external side face or at a bottom face of the package,
wherein the interlayer wirings are connected to the external electrode.
6. The optical component according to claim 3 , wherein the groove section further includes two or more steps.
7. The optical component according to claim 3 , wherein the groove section has a shape that is similar to and larger than the shape of the optical semiconductor element.
8. The optical component according to claim 3 , wherein the light-receiving face or the light-emitting face of the optical semiconductor element is provided to be perpendicular to an optical axis of the lens.
9. The optical component according to claim 3 , wherein the lens is a diffractive lens.
10. The optical component according to claim 9 , wherein a diffraction pattern of the diffractive lens is formed at a face opposed to the optical semiconductor element.
11. The optical component according to claim 3 , further comprising a step formed at a face of the package having contact with the cover, wherein the step is engaged with the cover.
12. The optical component according to claim 3 , further comprising a step at a side face of the cover,
wherein the step is engaged with an opening section of the package.
13. The optical component according to claim 3 , wherein the difference in linear expansion coefficient between the package and the lens is 9×10 −7 K −1 or less.
14. The optical component according to claim 3 , wherein the lens is made of glass material that includes at least SiO 2 and B 2 O 3 and that includes at least either Na 2 O or K 2 O.
15. The optical component according to claim 3 , wherein the lens is made of fluorine crown glass including at least SiO 2 , B 2 O 3 and fluorine.
16. The optical component according to claim 3 , wherein the lens is made of fluorophosphate glass including P 2 O 5 and fluorine.