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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
Integrated acousto-optic polarization converter in a ZX-cut LiNbO(3) waveguide superlattice
D Yudistira1, D Janner, S Benchabane
1ICFO-Institut de Ciencies Fotoniques, Mediterranean Technology Park, Castelldefels, Barcelona 08860, Spain. didit.yudistira@icfo.es
Optics Letters
|October 20, 2009
Summary
This study introduces a new surface acoustic superlattice (S-ASL) transducer for integrated acousto-optic polarization conversion. The novel device achieves 90% mode conversion efficiency, demonstrating its effectiveness for optical applications.
Area of Science:
- Photonics
- Acousto-optics
- Materials Science
Background:
- Integrated acousto-optic devices are crucial for optical signal processing.
- Surface acoustic wave (SAW) devices offer miniaturization and high performance.
- Periodically poled lithium niobate (PPLN) is a key material for nonlinear optical applications.
Purpose of the Study:
- To develop and characterize a novel integrated acousto-optic polarization converter.
- To demonstrate the efficacy of a surface acoustic superlattice (S-ASL) transducer.
- To achieve high mode conversion efficiency in an acousto-optic device.
Main Methods:
- Fabrication of a ZX-cut PPLN crystal with a 20 microm period.
- Excitation of surface acoustic waves (SAWs) using uniform coplanar electrodes.
- Measurement of mode conversion efficiency and optical bandwidth at 1456 nm wavelength.
Main Results:
- Achieved 90% mode conversion efficiency with 1 W input radio frequency (RF) power.
- Measured a 3 dB optical bandwidth of 2.5 nm.
- Confirmed SAW confinement and constructive interaction over a 10 mm electrode length.
Conclusions:
- The novel S-ASL transducer enables efficient integrated acousto-optic polarization conversion.
- The device performance validates the design principles for SAW confinement and interaction.
- This technology holds promise for advanced optical modulation and switching applications.
