Table 1 Parameters of FBGs

From: Transverse mode coupling in monolithic few-mode fiber laser oscillators

Mode/parameter

Resonant wavelength (nm)

LR reflectivity (%)

HR reflectivity (%)

LP01

1079.96

~9.9

>99.5

LP11e

1079.74

~8.9

~99.0

LP11o

1079.74

~8.9

~99.0

LP21o

1079.49

~7.8

~98.3

LP21e

1079.49

~7.8

~98.3

LP02

1079.40

~7.0

~97.5