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Published on: July 12, 2017
Guided-wave second-harmonic generation in a LiNbO3 nonlinear photonic crystal
Katia Gallo1, Christophe Codemard, Corin B E Gawith
1Optoelectronics Research Centre, University of Southampton, UK. kag@orc.soton.ac.uk
Optics Letters
|April 28, 2006
Summary
We achieved efficient twin-beam second-harmonic generation using a novel nonlinear photonic crystal. This optimized device, fabricated in lithium niobate, shows tunable performance for telecommunications applications.
Area of Science:
- Photonics and Nonlinear Optics
- Materials Science
- Integrated Optics
Background:
- Second-harmonic generation (SHG) is crucial for frequency conversion in photonics.
- Lithium niobate (LiNbO3) is a key material for nonlinear optical devices.
- Efficient SHG in integrated photonic devices requires optimized material processing and poling techniques.
Purpose of the Study:
- To demonstrate efficient twin-beam second-harmonic generation (SHG) at telecommunications wavelengths.
- To optimize a buried reverse proton-exchanged planar waveguide in 2D hexagonally poled LiNbO3 for SHG.
- To investigate the tunability of the nonlinear photonic crystal device.
Main Methods:
- Fabrication of a 2D hexagonally poled LiNbO3 crystal.
- Buried reverse proton exchange (DRPX) to create a planar waveguide.
- Characterization using a nanosecond, narrow-bandwidth, high-power fiber laser source.
Main Results:
- Successful demonstration of twin-beam SHG from telecommunications wavelengths.
- The optimized waveguide exhibited tunable nonlinear optical response.
- Device performance was explored in terms of power, wavelength, and angle.
Conclusions:
- The optimized buried waveguide in 2D hexagonally poled LiNbO3 is effective for twin-beam SHG.
- The device offers significant tunability for practical applications.
- This work advances integrated nonlinear photonics for telecommunications.
