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Published on: May 11, 2019
MgO:LiNbO(3) single-crystal fiber with magnesium-ion in-diffused cladding
Optics Letters
|September 11, 2009
Summary
Magnesium-ion in-diffusion created an optical waveguide in lithium niobate fibers. This process resulted in a parabolic refractive index profile, enabling quasi-single-mode propagation in the optical fiber.
Area of Science:
- Materials Science
- Optoelectronics
- Photonics
Background:
- Lithium niobate (LiNbO3) is a key material for optical devices.
- Controlling refractive index profiles is crucial for optical guiding.
- Single-crystal fibers offer unique properties for photonic applications.
Purpose of the Study:
- To investigate the formation of optical guiding structures in LiNbO3 single-crystal fibers.
- To analyze the refractive index profile created by Mg-ion in-diffusion.
- To evaluate the mode propagation characteristics of the fabricated optical waveguide.
Main Methods:
- Mg-ion in-diffusion process applied to MgO:LiNbO3 single-crystal fibers.
- Fabrication of a 56-microm-diameter, c-axis fiber.
- Analysis of the resulting refractive index profile.
- Measurement of optical propagation characteristics.
Main Results:
- Successfully formed an optical guiding structure within the LiNbO3 fiber.
- A parabolic refractive index profile was achieved.
- Quasi-single-mode (two-mode) propagation was observed.
Conclusions:
- Mg-ion in-diffusion is an effective method for creating optical waveguides in LiNbO3 fibers.
- The parabolic refractive index profile supports quasi-single-mode operation.
- This technique holds promise for developing advanced photonic devices based on LiNbO3 fibers.
