Integrated Optics - Applied Optics Fundamentals and Device Applications - page 218

a = b

n 2 n 3

n 5 n 1 n 4

b

1.2

a = b

1.0

0.8

E x 11΄ E y 11

0.6 E x 22΄ E y

22

E x 21΄ E y 21

E x
12΄

E y 12

0.4

E x 32΄ E y 32

0.2

1 2 3 4 5 6 7 8 9 10

1/2

2 b

λ n 1 - n 4

FIGURE 5.7
Propagation cutoff curve for λ 0 = 1.3 μm.

a = b

n 2
n 1

n 5 n 3

b

n 4

1.2

a = b

1.0

0.8

E 22΄
E y
22

0.6

E 11΄
E 11

y

E x
21΄
E 21

E 12 ΄
E 12

0.4

E 31΄ E y
31

0.2

1 2 3 4 5 6 7 8 9 10

1/2

2 b

λ n 1 - n 4

FIGURE 5.8
Propagation cutoff curve for λ 0 = 3.4 μm.