Table 1: The effective refractive indexes of the fundamental mode for different ratios.

( = 1.55 µm, = 1.44409)

Fixed pitch
( = 4.2 μm)
0.080.37
0.09
0.10
0.20
0.30
0.40
0.50
0.60
0.70
0.80
0.90

Fixed diameter
( = 0.84 μm)
0.080.15
0.090.17
0.100.19
0.200.37
0.300.56
0.400.71
0.500.91
0.601.11
0.701.25
0.801.48
0.901.67