Ridge waveguide laser in Nd:LiNbO3 by Zn-diffusion and femtosecond-laser structuring

Mendívil, J. Martínez de; Hoyo, Jesús del; Solı́s, J.; Lifante, G.

doi:10.1016/j.optmat.2016.10.008

Cited by 11 publications

(7 citation statements)

References 27 publications

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“…Since the first report on femtosecond laser written waveguides in glass by Davis et al [22], different types of integrated optical waveguides have been produced in a great diversity of transparent materials such as glasses, crystals, polycrystalline ceramics and polymers [48][49][50][51][52][53][54][55][56][57][58][59][60][61][62][63][64][65][66][67].…”

Section: Ultrafast Laser Inscriptionmentioning

confidence: 99%

“…Finally, in Type IV, waveguide also referred as ridge waveguides, the ultra-high intensity achieved by the femtosecond laser pulses is used to ablate the surface to produce ridge waveguides on planar waveguide substrates obtained by other methods. Therefore, the guiding features strongly depend on the planar waveguide substrate [63][64][65][66][67].…”

Section: Ultrafast Laser Inscriptionmentioning

confidence: 99%

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Ultrafast Laser Inscription of Buried Waveguides in W-TCP Bioactive Eutectic Glasses

Sola¹,

Peña²

2018

Advanced Surface Engineering Research

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Since the first report of Davis in 1996, ultrafast laser inscription (ULI) has been widely used to fabricate buried optical devices such as active and passive waveguides inside dielectric materials. In this technique, ultra-short and ultra-intense laser pulses are tightly focused inside transparent materials leading to laser-induced nonlinear processes in the focal volume. The energy density deposited into the submicron focal volume can reach several of MJcm −3 and hence, may trigger dramatic changes in a strongly localized region, whereas the surrounding bulk material remains unchanged. This technique can be used from void formation to weak refractive index modification, which is the key feature to create buried optical waveguides. In this chapter, firstly, we review the fundamentals of the ultrafast laser inscription technique to produce optical waveguides inside dielectric materials such as crystals and glasses. Next, as an example, we revise the application of this technique to create buried waveguides inside bioactive glasses and specifically, inside W-TCP eutectic glasses.

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Section: Ultrafast Laser Inscriptionmentioning

confidence: 99%

Section: Ultrafast Laser Inscriptionmentioning

confidence: 99%

Ultrafast Laser Inscription of Buried Waveguides in W-TCP Bioactive Eutectic Glasses

Sola¹,

Peña²

2018

Advanced Surface Engineering Research

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“…Lasers had the advantages of high processing speed, high processing accuracy, low thermal deformation and material savings in the processing of products due to their high degree of coherence, directionality and intensity. Among the group of methods, laser surface texturing (LST) was adopted to modify the surface roughness of materials since it can affect the wear [3], wettability [4][5][6][7], condensation [8], paint appearance [9], biofunctionalization [10], and waveguide properties [11]. A super-hydrophobic surface (SHS) was obtained on AISI304 stainless steel via a picosecond LST (patterning) technology; and the anti-biofouling performance was improved by the laser-induced micro-nano structures [4].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Dimple Overlap on Wettability and Corrosion Resistance of Laser-Textured Stainless Steel

et al. 2022

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During the laser surface texturing process, scanning overlap is usually misused, because it cannot only be dimple overlap, but also can be laser spot overlap. Experiments were conducted to investigate the relationship between laser spot overlap and dimple overlap during laser surface texturing. Moreover, the effect of dimple overlap on the laser textured microstructures, wettability, and corrosion performances of stainless steel was analyzed. The results have shown that, due to changing radiation conditions, the dimple diameter and dimple overlap varied in a non-linear way with the increase in laser spot overlap. Furthermore, the variation of dimple overlap rather than laser spot overlap had a direct effect on roughness, wettability, and corrosion resistance. When the dimple overlap was greater than 55%, the surface reached the superhydrophobic state and the maximum apparent contact angle was 162.6°. When the dimple overlap was 83.52%, due to passivation layer formed by laser remelting deposition and oxides compaction, corrosion current density was 2.8 × 10−8 A·cm−2, which was 4% of the original value. Consequently, it was determined that it is easier to control the surface roughness, wettability, and corrosion resistance via dimple overlap rather than laser spot overlap in laser surface texturing process.

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“…Laser direct writing can also facilitate hybrid integrated structures [ 24 ]. Ridge waveguide lasers were fabricated in neodymium doped lithium niobate via femtosecond direct laser writing of gradient index planar waveguides, fabricated by Zn in-diffusion [ 25 ]. The ridge waveguide approach increases the index contrast, thus increasing the mode confinement for small bend radius waveguide features.…”

Section: Introductionmentioning

confidence: 99%

Channel Waveguides in Lithium Niobate and Lithium Tantalate

Johnston

Dekker

et al. 2020

Molecules

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Low-loss photonic waveguides in lithium niobate offer versatile functionality as nonlinear frequency converters, switches, and modulators for integrated optics. Combining the flexibility of laser processing with liquid phase epitaxy we have fabricated and characterized lithium niobate channel waveguides on lithium niobate and lithium tantalate. We used liquid phase epitaxy with K2O flux on laser-machined lithium niobate and lithium tantalate substrates. The laser-driven rapid-prototyping technique can be programmed to give machined features of various sizes, and liquid phase epitaxy produces high quality single-crystal, lithium niobate channels. The surface roughness of the lithium niobate channels on a lithium tantalate substrate was measured to be 90 nm. The lithium niobate channel waveguides exhibit propagation losses of 0.26 ± 0.04 dB/mm at a wavelength of 633 nm. Second harmonic generation at 980 nm was demonstrated using the channel waveguides, indicating that these waveguides retain their nonlinear optical properties.

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Ridge waveguide laser in Nd:LiNbO3 by Zn-diffusion and femtosecond-laser structuring

Cited by 11 publications

References 27 publications

Ultrafast Laser Inscription of Buried Waveguides in W-TCP Bioactive Eutectic Glasses

Ultrafast Laser Inscription of Buried Waveguides in W-TCP Bioactive Eutectic Glasses

The Effect of Dimple Overlap on Wettability and Corrosion Resistance of Laser-Textured Stainless Steel

Channel Waveguides in Lithium Niobate and Lithium Tantalate

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