F. Heismann et al., ELECTROOPTIC POLARIZATION SCRAMBLERS FOR OPTICALLY AMPLIFIED LONG-HAUL TRANSMISSION-SYSTEMS, IEEE photonics technology letters, 6(9), 1994, pp. 1156-1158
To combat polarization hole burning in erbium-doped fiber amplifiers,
we modulate the input polarization state to a 8800-km long 5.33-Gb/s N
RZ transmission system at rates between 10 kHz and 10 GHz using integr
ated-optic polarization scramblers in lithium niobate. At modulation f
requencies of 40 kHz and 10.66 GHz, we observe improvements in the sig
nal-to-noise ratio of the received electrical signal of 4 and 5 dB, re
spectively.