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Published on: November 30, 2012
Mode tailoring in a ridge-type periodically poled lithium niobate waveguide
1Advanced Photonics Research Institute, Gwangju Institute of Science and Technology, 1 Oryong-dong, Buk-gu, Gwangju 500-712, Republic of Korea. laks@gist.ac.kr
Optics Express
|July 1, 2010
Summary
We developed a new method for generating and transforming light modes in periodically poled lithium niobate (PPLN) waveguides using temperature control. This technique allows selective generation of Hermite-Gaussian (HG) modes and their conversion into Laguerre-Gaussian (LG) modes.
Area of Science:
- Photonics and Optical Engineering
- Materials Science
Background:
- Periodically poled lithium niobate (PPLN) waveguides are crucial for nonlinear optical processes.
- Precise control over light modes is essential for advanced optical applications.
Purpose of the Study:
- To present a novel method for mode generation and transformation in PPLN waveguides.
- To demonstrate selective generation of Hermite-Gaussian (HG) modes.
- To show the transformation of HG modes into Laguerre-Gaussian (LG) modes.
Main Methods:
- Utilizing second-order nonlinear effects in a ridge-type PPLN waveguide.
- Employing a local-temperature-control technique.
- Tuning the fundamental wave's wavelength and waveguide temperature for quasi-phase-matching (QPM).
Main Results:
- Selective generation of HG modes (HG00 to HG22) was achieved by tuning wavelength or temperature.
- Simultaneous generation of multiple HG modes in a single PPLN waveguide was demonstrated.
- Transformation of generated HG modes into LG modes was successfully shown.
Conclusions:
- The presented method offers a simple and powerful approach for mode manipulation in PPLN waveguides.
- This technique enables versatile generation and transformation of optical modes for potential applications in optical communications and information processing.
