阅读说明：本技术 基于集成非球面半透镜的超紧凑平面模式尺寸转换器 (Ultra-compact plane mode size converter based on integrated aspheric semi-transparent mirror ) 是由 锡亚马克·阿巴斯卢 江伟 罗伯特·加图杜拉 于 2018-02-27 设计创作，主要内容包括：光束转换器包括：锥形耦合器结构,其结构宽度是变化的；集成非球面半透镜结构,其直边近端与所述锥形耦合器结构的远端相邻,并与之直接接触；凸形半透镜结构,其弯曲的近端与所述集成非球面半透镜结构的弯曲远端直接接触。(The light beam converter includes: a tapered coupler structure, the structural width of which varies; an integrated aspheric semi-transparent mirror structure having a straight edge proximal end adjacent to and in direct contact with the distal end of the tapered coupler structure; a convex semi-transparent mirror structure having a curved proximal end in direct contact with a curved distal end of the integrated aspheric semi-transparent mirror structure.)

1. An optical beam converter comprising:

a tapered coupler structure, the structural width of which varies;

an integrated aspheric semi-transparent mirror structure having a straight edge proximal end adjacent to and in direct contact with the distal end of the tapered coupler structure; a convex semi-transparent mirror structure having a curved proximal end in direct contact with a curved distal end of the integrated aspheric semi-transparent mirror structure.

2. The optical beam converter of claim 1, wherein the tapered coupler structure comprises:

a parabolic tapered portion having a parabolic cross-sectional shape and receiving light from the light source;

a rapidly linear tapered section having a first width at a proximal end thereof that is less than a second width at a distal end thereof, the proximal end being adjacent to and in direct contact with the straight edge of the parabolic tapered section.

3. The optical beam converter according to claim 1 wherein the convex half mirror portion includes a straight-sided distal end connected to a waveguide having substantially the same width as the straight-sided distal end of the convex half mirror portion.

4. The beam converter of claim 1 wherein the tapered coupler is a non-adiabatic taper.

5. The optical beam converter of claim 1 wherein the tapered coupler, the integrated aspheric semi-transparent mirror structure and the convex semi-transparent mirror portion are located in a single layer of semiconductor material.

6. The optical beam converter of claim 1 wherein the single layer of semiconductor material comprises silicon.

7. The beam converter of claim 5 further comprising a silicon dioxide layer, wherein the single layer of semiconductor material is located on the silicon dioxide layer.

8. The beam converter of claim 7 further comprising a silicon substrate layer, wherein the silicon dioxide layer is stacked between the single layer of semiconductor material and the silicon substrate layer.

9. The beam converter of claim 7 further comprising a second silicon dioxide layer cladding on the surface of the single layer of semiconductor material.

10. The beam converter of claim 2, wherein a total length of the beam converter is less than or equal to about six times a wavelength of light from the light source.

11. The beam converter of claim 10 wherein the wavelength is around 1520nm-1570 nm.

12. A beam converter as claimed in claim 1, having a waveguide width ratio of 20: about 1.

13. The optical beam converter according to claim 1 wherein the optical beam converter produces at least a planar wavefront having a gaussian-like intensity distribution in the convex half-mirror portion.

14. The beam converter of claim 1 wherein light enters from the tapered coupler and the beam width of the light is expanded after the light passes through the beam converter.

15. The beam converter according to claim 1, wherein light is coupled from the convex half mirror portion and a beam width of the light is reduced after the light passes through the beam converter.

16. The optical beam converter of claim 1 wherein the optical beam converter is fabricated on a 220nm silicon-on-insulator platform or a 260nm silicon-on-insulator platform.

17. The light beam converter according to claim 2, wherein the parabolic tapered section has a length of about 0.9 μm to about 1 μm, and the fast linear tapered section has a length of about 3.61 μm to about 4.54 μm.

18. The beam converter of claim 2 wherein the width of the parabolic tapered section is about 1.7-1.776 μm and the width of the fast linear tapered section is about 3.3-3.725 μm.

19. The beam converter according to claim 1 wherein the length of the convex half mirror portion is about 0.78um-1.03 μm.

20. The beam converter of claim 1 wherein the distal width of the convex half mirror portion is about 10 um.