Local periodic poling of ridges and ridge waveguides on X- and Y-Cut LiNbO_3 and its application for second harmonic generation

Gui, Li; Hu, Hui; Garcia-Granda, M.; Sohler, W.

doi:10.1364/oe.17.003923

Cited by 43 publications

(20 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Titanium indiffused waveguides exhibit the lowest losses observed from any nonlinear waveguide technology, with losses as low as 0.02 dB/cm [16]. Ridge waveguides have shown measured losses as low as 0.1 dB/cm, [21]. At the same time, ridge waveguides have demonstrated single-pass second harmonic conversion efficiencies of around 240%W −1 cm −2 (for SH at 340nm) [13] whilst titanium indiffused waveguides produced in our group have shown single-pass second harmonic conversion efficiencies up to around 40%W −1 cm −2 in short samples.…”

Section: Introductionmentioning

confidence: 99%

High-power waveguide resonator second harmonic device with external conversion efficiency up to 75%

Stefszky¹,

Ricken²,

Eigner³

et al. 2018

J. Opt.

View full text Add to dashboard Cite

We report on a highly efficient waveguide resonator device for the production of 775 nm light using a titanium indiffused LiNbO3 waveguide resonator. When scanning the resonance the device produces up to 110 mW of second harmonic power with 140 mW incident on the device -an external conversion efficiency of 75%. The cavity length is also locked, using a Pound-Drever-Hall type locking scheme, involving feedback to either the cavity temperature or the laser frequency. With laser frequency feedback a stable output power of approximately 28 mW from a 52 mW pump is seen over one hour.

show abstract

Section: Introductionmentioning

confidence: 99%

High-power waveguide resonator second harmonic device with external conversion efficiency up to 75%

Stefszky¹,

Ricken²,

Eigner³

et al. 2018

J. Opt.

View full text Add to dashboard Cite

show abstract

“…17 However, annealing the samples in vacuum can lead to the evaporation of different Li and O gases depending on the annealing temperature, as revealed by Auger electron spectroscopy and mass spectrometry. 18 Lithium niobate X cuts and Y cuts are also of technological relevance 21 and some information regarding growth techniques and postgrowth treatments ͑to improve the sample quality͒ can be found. 22 However, little detailed information on the surface atomic structure is available.…”

Section: Introductionmentioning

confidence: 99%

Lithium niobateX-cut,Y-cut, andZ-cut surfaces fromab initiotheory

2010

View full text Add to dashboard Cite

Density-functional theory calculations of the LiNbO 3 ͑2110͒, ͑1100͒, and ͑0001͒ surfaces, commonly referred to as X, Y, and Z cuts, are presented. In case of the Z cut, we find a pronounced dependence of the surface structure and stoichiometry on the direction of the ferroelectric polarization. In contrast, the influence of the chemical potentials of the surface constituents is limited. Rather electrostatics governs the surface stability. Different from the Z cut, the stoichiometry of the X cut and Y cut is clearly dependent on the preparation conditions. The surface charge observed for the nominal nonpolar Y cut is traced back to the formation of a strong surface dipole.

show abstract

“…In the case of ridge waveguides the issue was addressed using a cumbersome fabrication process for the electrodes and thereby poling across the ridges (and thus again along the z-axis). 9,10 For WGM resonators, utilizing radially poled z-cut crystals might be a possible alternative.…”

mentioning

confidence: 99%

Direct writing of ferroelectric domains on the x- and y-faces of lithium niobate using a continuous wave ultraviolet laser

Steigerwald

Ying

Eason

et al. 2011

Applied Physics Letters

View full text Add to dashboard Cite

Ferroelectric domain reversal has been achieved by scanning a tightly focused, strongly absorbed UV-laser beam across the x-and y-faces of lithium niobate crystals. The domains were investigated by piezoresponse force microscopy. The emergence and width of any domain was found to depend on the scanning direction of the irradiating laser beam with respect to the polar z-axis. Full width and half width domains, or no domain formation at all could be achieved for scanning along specific directions. We interpret the results by a direct correlation between the local temperature gradient and the resulting polarization direction.PACS numbers: 77.65.-j, 68.37. Ps, 77.80.Dj Lithium niobate (LiNbO 3 ) has recently become the material of first choice for nonlinear optical applications in the visible and near-infrared wavelength range. 1In many cases patterning of ferroelectric domains at a length scale of sub-to-few microns is required. For instance frequency conversion employing quasi-phase matching relies on a periodically poled domain pattern. 2Domain patterning is in general performed by electric field poling (EFP) with structured electrodes, which reverses the direction of polarization by locally applying an electric field along the polar z-axis of the crystal, exceeding the so-called coercive field (E c ). 3A different approach for domain patterning uses direct UV-laser beam writing.4 It was found that irradiating the −z-face of LiNbO 3 with a tightly focussed, strongly absorbed UV-laser beam creates ferroelectric domains along the laser-written track without any application of an external electric field. The very same procedure on the +z-face results in poling inhibition of the irradiated area.

show abstract

Local periodic poling of ridges and ridge waveguides on X- and Y-Cut LiNbO_3 and its application for second harmonic generation

Cited by 43 publications

References 13 publications

High-power waveguide resonator second harmonic device with external conversion efficiency up to 75%

High-power waveguide resonator second harmonic device with external conversion efficiency up to 75%

Lithium niobateX-cut,Y-cut, andZ-cut surfaces fromab initiotheory

Direct writing of ferroelectric domains on the x- and y-faces of lithium niobate using a continuous wave ultraviolet laser

Contact Info

Product

Resources

About