Modulation efficiency of a LiNbO3 waveguide electro-optic intensity modulator operating at high microwave frequency.
The modulation efficiency, at high-frequency microwave modulation, of a LiNbO(3) waveguide electro-optic modulator is shown to be degraded severely, especially when it is used as a frequency translator in a Brillouin-distributed fiber-sensing system. We derive an analytical expression for this attenuation regarding the phase-velocity mismatch and the impedance mismatch during the modulation process. Theoretical results are confirmed by experimental results based on a 15 Gb/s LiNbO(3) optical intensity modulator.
Liao
Yi
Y
National University of Defense Technology, Changsha, Hunan, 410073, China. ly04070025@163.com
Zhou
Huijuan
H
Meng
Zhou
Z