Directional light beam generators
AssigneeQxwave Inc
InventorXiangcun Long
Life of this patent
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Abstract
Directional light beam generators are implemented in waveguides with tilted core structures. The waveguides have cores, cladding and jacket layers. A directional light beam with small divergent beam angle is generated after propagating through the waveguides. Divergent light beams with large beam sizes can be converted into beams with small sizes.
Claims25
A waveguide device reducing divergent angle of input beam from βin to βout with fiber waveguide geometry comprising:
- a first core with cone structure with tilted angle α;
- a second core surrounding said first core with said cone structure;
- a cladding surround second core with lower index than said second core materials and a protect jacket.
The fiber in claim 12, wherein said cone arrays as said first core are located inside said second core with array pitch PA.
Multi-sections waveguide structure in claim 17, wherein said refractive index of said core and cladding for ith section waveguide with said desired divergent angle βini of input beam are given by n3i=n2i cos βini.
A directional beam generator converting lights with all of wavelengths from light sources to a directional beam with small divergent angle.
A directional beam generator used to focus a beam by lens with focus length f to small beam size with said diameter Φ=2f·tan βout.
Dependencies are inferred from the claim text.