Waveguide couplers and junctions to enable frequency division multiplexed sensor systems in autonomous vehicle

A wavelength selective communication system, comprising:

• a primary dielectric waveguide having a first cross-sectional area;
• a coupling arm dielectric waveguide communicatively coupled to the primary dielectric waveguide, wherein the coupling arm has a second cross-sectional area that is smaller than or equal to the cross-sectional area of the first cross-sectional area;
• and
• a waveguide connector for communicatively coupling the primary dielectric waveguide to the coupling arm dielectric waveguide, wherein the waveguide connector comprises a primary portion with apertures sized to accommodate the primary dielectric waveguide and a coupling arm portion sized to accommodate the coupling arm dielectric waveguide, and wherein the coupling arm portion of the waveguide connector is tapered.