Optical soliton generation in a photorefractive Fe-doped lithium niobate crystal by a pyroelectric effect

We present the experimental demonstration of a self-trapped optical beam bending in a photorefractive Fe-doped lithium niobate (LN:Fe) crystal controlled by the pyroelectric effect. Formation of self-trapped beams with typical [Formula: see text]50[Formula: see text][Formula: see text]m diameter and large bending of [Formula: see text]140[Formula: see text][Formula: see text]m are depicted in a 1[Formula: see text]cm length LN:Fe crystal for a laser beam at 632.8[Formula: see text]nm wavelength and 0.5[Formula: see text]mW power with a 30∘C crystal temperature change. The self-trapped beam bending is opposite to the crystal [Formula: see text]-axis. The underlying physics is elaborated and numerical simulations are performed. The long-living waveguiding channels with controlled curvilinear trajectories are promising for optical information routing.

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Reflectometry Study of the Pyroelectric Effect on Proton-Exchange Channel Waveguides in Lithium Niobate

Applied Sciences ◽

10.3390/app11219853 ◽

2021 ◽

Vol 11 (21) ◽

pp. 9853

Author(s):

Roman Ponomarev ◽

Yuri Konstantinov ◽

Maxim Belokrylov ◽

Ivan Lobach ◽

Denis Shevtsov

Keyword(s):

Lithium Niobate ◽

Optical Waveguides ◽

Lithium Niobate Crystal ◽

Proton Exchange ◽

Optical Losses ◽

Pyroelectric Effect ◽

Optical Frequency Domain Reflectometry ◽

Exchange Channel ◽

Frequency Domain Reflectometry ◽

Channel Waveguides

This work is devoted to the study of the pyroelectric effect on the properties of optical waveguides formed in a lithium niobate crystal by proton exchange. In the present work, we studied the cessation effect of the radiation channeling during thermocycling of Y-splitters samples. We examined the spectral dependence of optical losses on the wavelength using an optical spectrum analyzer. The results demonstrate that in the range of 1530–1570 nm, all wavelengths are suppressed equally. The optical frequency domain reflectometry shows that the increase of optical losses is observed along the entire waveguide, but not only at the Y-splitting point, as supposed earlier.

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Reflectometry Study of the Pyroelectric Effect on Proton-Exchange Channel Waveguides in Lithium Niobate

10.20944/preprints202110.0029.v1 ◽

2021 ◽

Author(s):

Roman Ponomarev ◽

Yuri Konstantinov ◽

Ivan Lobach ◽

Maxim Belokrylov ◽

Denis Shevtsov

Keyword(s):

Lithium Niobate ◽

Optical Waveguides ◽

Lithium Niobate Crystal ◽

Proton Exchange ◽

Optical Losses ◽

Pyroelectric Effect ◽

Exchange Channel ◽

Distribution Point ◽

Optical Reflectometry ◽

Channel Waveguides

This work is devoted to the study of the pyroelectric effect on the qualities of optical waveguides formed in a lithium niobate crystal by proton exchange. In the present work, we investigated the cessation effect of the radiation channeling during thermocycling of Y-splitters samples. We examined the spectral dependence of optical losses on a wavelength using an optical spectrum analyzer. The results demonstrate that in the range of 1530–1570 nm, all wavelengths are suppressed equally. The optical reflectometry method in the frequency domain shows that the increase of optical losses is observed along the entire waveguide, but not only at the Y-distribution point, as supposed earlier.

Download Full-text