Figure 1.

Bend-directional coupler PBS"

Figure 2.

Top view of tapered bend-directional couplers PBS"

Figure 3.

Top view of tilted subwavelength grating PBS"

Figure 4.

PBS based on a tilted nano-grating"

Figure 5.

Asymmetric MMI ultra-compact PBS top view"

Figure 6.

Angle MMI polarization beam splitter"

Figure 7.

Multi-mode interference coupler PBS based on subwavelength grating"

Table 1.

Performance comparison of PBS with various structures"

Figure 8.

Top view of 1×2 output facet tilted MMI demultiplexer"

Figure 9.

MMI-based beam splitter demultiplexer"

Figure 10.

Structure of ultra-compact MMI-based beam splitter demultiplexer"

Figure 11.

Polarization independent 1×2 power dividers and directional couplers demultiplexer based on sandwich structure (a)Top view (b)Cross section of DC waveguide"

Figure 12.

Wavelength demultiplexer based on subwavelength grating"

Figure 13.

Top view of a novel wavelength demultiplexer based on SWG structure"

Table 2.

Performance comparison of wavelength beam splitters with different structures"

Figure 14.

Y-type optical power splitter based on tapered waveguide"

Figure 15.

Structure diagram of Y-junction with an arbitrary power splitting ratio"

Figure 16.

Top view of optical power beam splitter based on MMI"

Figure 17.

Integrated dual-mode optical power splitter based on MMI"

Figure 18.

MMI optical power splitter based on subwavelength grating"

Figure 19.

2×2 optical power splitter based on bend- DC"

Figure 20.

Top view of optical power splitter with arbitrary power distribution ratio"

Table 3.

Performance comparison of various optical power beam splitters"