title: Double phase conjugation in copper-doped potassium sodium strontium barium niobate crystals.
abstract: 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.
authors.forename: L
authors.initials: L
authors.lastname: Zhang
authors.forename: W
authors.initials: W
authors.lastname: Zhang
authors.forename: X
authors.initials: X
authors.lastname: Chen
authors.forename: G
authors.initials: G
authors.lastname: Zhang
authors.forename: S
authors.initials: S
authors.lastname: Pan
authors.forename: J
authors.initials: J
authors.lastname: Zhang
authors.forename: Z
authors.initials: Z
authors.lastname: Shao
authors.forename: J
authors.initials: J
authors.lastname: Han
authors.forename: H
authors.initials: H
authors.lastname: Chen