Open Access
Review
Table 3
Comparison of research literature on OTTDLs.
Structure | Delay accuracy/ps | Adjustable delay range/ps | Scanning range | Frequency/GHz | Chip platform | Footprint (mm2) |
---|---|---|---|---|---|---|
MRR [28] | – | 0–236 | – | 10.7–12.75 | TriPleXTM waveguide | – |
MRR [29] | – | 0–500 | 10 | Si3N4 waveguide | 90 | |
MRR [30] | 20 | 0–160 | 0–16 | SOI | 8 | |
GDL [33] | 6.6 | 60 | 10 | SOI | ||
GDL [34] | 4.7 | 181.9 | 10 | Si | ||
GDL [35] | 0.2 | 200 | −36.8° to +36.8° | 8–12 | SOI | |
PS [36] | 13.5 | 148.5 | – | – | – | |
OS [37] | 2.5 | 0–96 | −75.51° to 75.64° | 8–18 | SOI | 42.8 |
AWG [38] | 10.3 | 20,000 |
Note: MRR stands for Miniature Resonant Ring; GDL stands for Grating Delay Line; AWG stands for Array Waveguide Grating; PS stands for Path Switching; OS stands for Optical Switch.
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