Ultrafast direct laser writing of cladding waveguides in the 0.8CaSiO3-0.2Ca3(PO4)2 eutectic glass doped with Nd3+ ions

Mendívil, J. Martínez de; Sola, D.; Aldana, Javier R. Vázquez de; Lifante, G.; Aza, Antonio H. De; Pena, P.; Peña, José

doi:10.1063/1.4906963

Cited by 16 publications

(12 citation statements)

References 33 publications

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“…In this technique, ultra-short laser pulses are tightly focused inside transparent materials inducing nonlinear absorption processes in the focal volume and leading to permanent weak local refractive index variations, formation of nano-voids, crystallization processes or even chemical transformations. This technique has been widely used to modify crystalline and glassy matrices as well as polymers to produce passive and active photonic devices, to create 2D/3D micro/nanostructures or to activate and functionalize the surface [15][16][17][18][19][20][22][23][24][25][26][27][28][29][30][31][32][33][34][35]. Nevertheless, despite laser ablation of polymers is a well stablished process for industrial applications the contribution of the main mechanisms which may take part in the laser-polymer interaction process, i.e., photo-chemical and photo-thermal decomposition processes, are not clearly solved and the discussion is still controversial.…”

Section: Introductionmentioning

confidence: 99%

High-Repetition-Rate Femtosecond Laser Processing of Acrylic Intra-Ocular Lenses

Sola

Cases

2020

Polymers

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The study of laser processing of acrylic intra-ocular lenses (IOL) by using femtosecond laser pulses delivered at high-repetition rate is presented in this work. An ultra-compact air-cooled femtosecond diode laser (HighQ2-SHG, Spectra-Physics) delivering 250 fs laser pulses at the fixed wavelength of 520 nm with a repetition rate of 63 MHz was used to process the samples. Laser inscription of linear periodic patterns on the surface and inside the acrylic substrates was studied as a function of the processing parameters as well as the optical absorption characteristics of the sample. Scanning Electron Microscopy (SEM) Energy Dispersive X-ray Spectroscopy (EDX), and micro-Raman Spectroscopy were used to evaluate the compositional and microstructural changes induced by the laser radiation in the processed areas. Diffractive characterization was used to assess 1st-order efficiency and the refractive index change.

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Section: Introductionmentioning

confidence: 99%

High-Repetition-Rate Femtosecond Laser Processing of Acrylic Intra-Ocular Lenses

Sola

Cases

2020

Polymers

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“…Aiming towards an integrated waveguide-NV device and considering that thermal annealing is required to form the NV centers in diamond, the effect of heat treatment on the laser formed waveguide was first investigated. Type II waveguides written in other crystals have been shown to get erased with high temperature annealing [106,107]. In order to study the effect of high temperature annealing on laser written waveguides in diamond, micro-Raman analysis was employed.…”

Section: Femtosecond Laser Inscribed Integrated Quantum Photonic Chipmentioning

confidence: 99%

Femtosecond laser written photonic and microfluidic circuits in diamond

et al. 2019

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Diamond has attracted great interest in the quantum optics community thanks to its nitrogen vacancy (NV) center, a naturally occurring impurity that is responsible for the pink coloration of some diamond crystals. The NV spin state with the brighter luminescence yield can be exploited for spin readout, exhibiting millisecond spin coherence times at ambient temperature. In addition, the energy levels of the ground state triplet of the NV are sensitive to external fields. These properties make NVs attractive as a scalable platform for efficient nanoscale resolution sensing based on electron spins and for quantum information systems. Integrated diamond photonics would be beneficial for optical magnetometry, due to the enhanced light-matter interaction and associated collection efficiency provided by waveguides, and for quantum information, by means of the optical linking of NV centers for long-range entanglement. Diamond is also compelling for microfluidic applications due to its outstanding biocompatibility, with sensing functionality provided by NV centers. Furthermore, laser written micrographitic modifications could lead to efficient and compact detectors of high energy radiation in diamond. However, it remains a challenge to fabricate optical waveguides, graphitic lines, NVs and microfluidics in diamond. In this Review, we describe a disruptive laser nanofabrication method based on femtosecond laser writing to realize a 3D micro-nano device toolkit for diamond. Femtosecond laser writing is advantageous compared to other state of the art fabrication technologies due to its versatility in forming diverse micro and nanocomponents in diamond. We describe how high quality buried optical waveguides, low roughness microfluidic channels, and on-demand NVs with excellent spectral properties can be laser formed in single-crystal diamond. We show the first integrated quantum photonic circuit in diamond consisting of an optically addressed NV for quantum information studies. The rapid progress of the field is encouraging but there are several challenges which must be met to realize future quantum technologies in diamond. We elucidate how these hurdles can be overcome using femtosecond laser fabrication, to realize both quantum computing and nanoscale magnetic field sensing devices in synthetic diamond.

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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%

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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Ultrafast direct laser writing of cladding waveguides in the 0.8CaSiO3-0.2Ca3(PO4)2 eutectic glass doped with Nd3+ ions

Cited by 16 publications

References 33 publications

High-Repetition-Rate Femtosecond Laser Processing of Acrylic Intra-Ocular Lenses

High-Repetition-Rate Femtosecond Laser Processing of Acrylic Intra-Ocular Lenses

Femtosecond laser written photonic and microfluidic circuits in diamond

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

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