Table 2 Types and lengths of fibers for the proposed comb filter structure.

From: A simple all-fiber comb filter based on the combined effect of multimode interference and Mach-Zehnder interferometer

Sample Number

Fiber 1

Fiber 2

Extinction Ratio(dB)

Material

Length (mm)

Material

Length (mm)

a

AFS105/125

4.0

ANDREW55

0.6

17.01

b

AFS105/125

5.3

ANDREW55

1.6

12.06

c

NC61.5

20.1

ANDREW55

2.1

11.15

d

AFS50/125

8.3

ANDREW55

3.0

12.75

e

NC125

7.0

ANDREW55

3.3

11.51

f

SM460

7.2

SM460

3.6

10.17