Open Access
Review

Table 2

Comparison of research literature on optical true delay lines.

Structure Delay accuracy/ps Adjustable delay range/ps Frequency/GHz Chip platform
GDL [33] 6.6 60 10 SOI
GDL [34] 4.7 181.9 10 Si
GDL [35] 0.2 200 8–12 SOI

GDL stands for Grating Delay Line.

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