Optical waveguides fabricated in Cr:LiSAF by femtosecond laser micromachining

Biasetti, Demian A.; Liscia, Emiliano Javier Di; Torchia, G. A.

doi:10.1016/j.optmat.2017.07.042

Cited by 9 publications

(3 citation statements)

References 18 publications

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“…Cr:LiSAF is an attractive broadband solid-state laser medium in the near-infrared region [1][2][3][4][5][6]. It shows a broad absorption band centered around 650 nm (FWHM:~100 nm) [7], that enables flexible pumping by low-cost red laser diodes or LEDs (light emitting diodes) [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Mode-locked Cr:LiSAF laser far off the gain peak: tunable sub-200-fs pulses near 1 µm

et al. 2021

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We report, to the best of our knowledge, first mode-locking results of a Cr:LiSAF laser near 1 micrometer region. The system is pumped only by a single 1.1 W high-brightness tapered diode laser at 675 nm. A semiconductor saturable absorber mirror (SESAM) with a modulation depth of 1.5% and non-saturable losses below 0.5% was used for mode-locking. Once mode-locked, the Cr:LiSAF laser produced almost-transform-limited sub-200-fs pulses with up to 12.5 mW of average power at a repetition rate of 150 MHz. Using an intracavity birefringent filter, the central wavelength of the pulses could be smoothly tuned in the 1000-1020 nm range. Via careful dispersion optimization, pulsewidths could be reduced down to 110-fs level. The performance in this initial study was limited by the design parameters of the SESAM used, especially its passive losses, and could be improved with an optimized SESAM design.

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Section: Introductionmentioning

confidence: 99%

Mode-locked Cr:LiSAF laser far off the gain peak: tunable sub-200-fs pulses near 1 µm

et al. 2021

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“…It is a frontier subject formed by the intersection of biology, medicine, chemistry, physics and materials science. It is the basis for the preparation of artificial tissues or organs, the development of high-performance medical devices, the development of new drug dosage forms and the research of bionic effects [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Study on Micromachining of Femtosecond Laser Biomedical Polymer Materials

Fang

Qiao

Zhang

et al. 2020

KEM

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Femtosecond laser micromachining is a hot topic in the field of micromachining. Femtosecond laser processing of biomacromolecular micro devices has a promising application prospect. The research content of this paper is femtosecond laser micromachining of biomacromolecule materials, aiming at exploring the mechanism of femtosecond laser micromachining. In this paper, the principle of the interaction between laser and polymer materials is briefly expounded, and the photophysical processes such as transition, energy conversion, energy transfer and electron transfer are explained from the molecular orbital, and the mechanism is classified as photothermal and photochemical action, which is manifested as accelerating material's relaxation transformation process and degradation process. The interaction between polymer materials and laser starts from molecules absorbing the energy of photons to complete the transition from ground state to excited state. Different modes of excitation state inactivation correspond to the conversion of light energy into light energy, heat energy or chemical energy. On the one hand, the thermal action leads to the viscoelastic transformation of the material, and the material deforms or flows under the thermoelastic action; on the other hand, the thermal action accelerates the degradation reaction of the polymer material. The carbonyl group on the molecular chain of PMMA and PLA is more likely to reach the excited state, and the chemical properties of the carbonyl excited state determine that the photochemical processes of PMMA and PLA concentrate on the carbonyl group.

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“…), micro EDM, micro ECM, laser beam machining, electron beam machining and photo-chemical-machining; For additive processes, the relevant techniques are surface coating (CVD, PVD), direct writing (inkjet, laser-guided), microcasting, microinjection moulding, sintering, photo-electron-forming, chemical deposition, polymer deposition and stereolithography; For deforming processes, there are micro forming (stamping, extrusion, forging, bending, deep drawing, incremental forming, superplastic forming, hydro-forming, punching), hot embossing, and micro/nano-imprinting; For joining processes, the related techniques are micro-mechanical-assembly, resistance, laser, vacuum soldering, bonding/welding, and gluing; For hybrid processes, there are micro-laser-ECM, LIGA and LIGA combined with laser machining, micro-EDM and laser assembly, shape deposition and laser machining, laser assisted micro forming, micro assembly injection moulding, combined micromachining and casting. [10][11][12][13][14][15][16][17] better option for the mass-manufacture of microproducts at a reduced cost with a proper manufacturing facility attached with uniform clearance between micropunch and microdie. Also, micropunching was demonstrated in the punching of circular and noncircular holes as small as 5 microns in size.…”

Section: Introductionmentioning

confidence: 99%

Micropunched microholes potential for bioapplications

Guo¹

2018

MOJABB

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Punching is the process of forcing a punch through the material and into a die to create a hole in the work piece, and the most popular method for fabricating holes for mass production. It is often an economic way of creating shaped holes in mass production. It also offers some attractive characteristics that are superior to those of other processes, for example, machining and chemical etching, considering such features as high production-rates, better material integrity, less waste, lower manufacturing costs, etc. Therefore, micropunching is a

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Optical waveguides fabricated in Cr:LiSAF by femtosecond laser micromachining

Cited by 9 publications

References 18 publications

Mode-locked Cr:LiSAF laser far off the gain peak: tunable sub-200-fs pulses near 1 µm

Mode-locked Cr:LiSAF laser far off the gain peak: tunable sub-200-fs pulses near 1 µm

Study on Micromachining of Femtosecond Laser Biomedical Polymer Materials

Micropunched microholes potential for bioapplications

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