Double phase conjugation in copper-doped potassium sodium strontium barium niobate crystals.
We show a double phase conjugator with novel crystals of copper-doped potassium sodium strontium barium niobate. The phase conjugation reflectivity can reach 278% and depends on relative input positions of both incident beams. The response time with the input beam power ratio is measured and modeled as a function of input beam power ratio. The formation of the arch coupling loop is analyzed with theoretical simulation results and a positive feedback process is proposed. The influence of a self-pumped phase conjugation process on double phase conjugation fidelity is also discussed. It is necessary to avoid generating self-pumped phase conjugation to prevent the reduction of double phase conjugation fidelity.
Zhang
L
L
Zhang
W
W
Chen
X
X
Zhang
G
G
Pan
S
S
Zhang
J
J
Shao
Z
Z
Han
J
J
Chen
H
H