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Fabrication of Surface Acoustic Wave Devices on Lithium Niobate
Published on: June 18, 2020
Nonlinear multiwavelength conversion based on an aperiodic optical superlattice in lithium niobate
Optics Letters
|November 23, 2007
Summary
Researchers achieved multiwavelength conversion using aperiodic optical superlattice (AOS) lithium niobate crystals. This breakthrough enables efficient double and triple-wavelength second-harmonic generation (SHG) with high tolerance to fabrication errors.
Area of Science:
- Nonlinear Optics
- Materials Science
- Photonics
Background:
- Aperiodic optical superlattices (AOS) offer unique advantages for nonlinear optical processes.
- Achieving efficient multiwavelength conversion is crucial for advanced photonic applications.
Purpose of the Study:
- To demonstrate the first successful multiwavelength conversion in an aperiodic optical superlattice (AOS) lithium niobate crystal.
- To achieve equalized gain for efficient double and triple-wavelength second-harmonic generation (SHG).
Main Methods:
- Fabrication and characterization of two AOS devices in lithium niobate.
- Numerical synthesis of AOS structures from 2857 crystal blocks with 3.5 microm unit thickness.
- Experimental and simulation analysis of double and triple-wavelength SHG at 50 degrees C.
Main Results:
- Successful demonstration of multiwavelength conversion in AOS lithium niobate.
- Achieved double-wavelength SHG with fundamental wavelengths at 1540 and 1545 nm.
- Achieved triple-wavelength SHG with fundamental wavelengths at 1540, 1545, and 1553 nm.
- Demonstrated that the output spectrum is insensitive to fabrication errors.
Conclusions:
- Aperiodic optical superlattice lithium niobate crystals are effective for multiwavelength conversion.
- The demonstrated technique provides equalized gain for efficient SHG.
- The robustness to fabrication errors enhances the practical applicability of AOS devices.
