Femtosecond laser inscribed cladding waveguide structures in LiNbO3 crystal for beam splitters

Li, Shiling; Ye, Yongkai; Shen, Chuanying; Wang, Hailong

doi:10.1117/1.oe.57.11.117103

Cited by 6 publications

(2 citation statements)

References 30 publications

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“…5(a) 34 . With such configuration, however, it is still quite challenging to realize branched waveguide channels [44][45][46][47][48] . To this end, a new family of hexagonal "photonic-lattice-like" cladding photonic structures, which usually contain multiple linear FsLDW tracks (based on Type-II modification) periodically packed in a hexagonal layout with cores located at enclosed track-free regions, was proposed 49,50 .…”

Section: Multi-linementioning

confidence: 99%

Femtosecond laser direct writing of flexibly configured waveguide geometries in optical crystals: fabrication and application

Jia¹,

Wang²,

Chen³

2020

Opto-Electronic Advances

135

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Optical waveguides are far more than mere connecting elements in integrated optical systems and circuits. Benefiting from their high optical confinement and miniaturized footprints, waveguide structures established based on crystalline materials, particularly, are opening exciting possibilities and opportunities in photonic chips by facilitating their on-chip integration with different functionalities and highly compact photonic circuits. Femtosecond-laser-direct writing (FsLDW), as a true three-dimensional (3D) micromachining and microfabrication technology, allows rapid prototyping of on-demand waveguide geometries inside transparent materials via localized material modification. The success of FsLDW lies not only in its unsurpassed aptitude for realizing 3D devices but also in its remarkable material-independence that enables cross-platform solutions. This review emphasizes FsLDW fabrication of waveguide structures with 3D layouts in dielectric crystals. Their functionalities as passive and active photonic devices are also demonstrated and discussed.

show abstract

Section: Multi-linementioning

confidence: 99%

Femtosecond laser direct writing of flexibly configured waveguide geometries in optical crystals: fabrication and application

Jia¹,

Wang²,

Chen³

2020

Opto-Electronic Advances

135

View full text Add to dashboard Cite

show abstract

“…In Refs. [35] and [39][40][41], fs laser-written Type I and Type II LiNbO 3 waveguide beamsplitters for transmission at visible or near-infrared bands were demonstrated. However, because of the limitation (0.4-2.9 μm) in the transmission band and fabrication procedure, it is still necessary to realize an effective full-wavelength waveguide beam splitter.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional polarization-dependent full-wavelength beam splitter written by femtosecond laser in LiNbO3 crystal

Lv,

Li,

et al. 2024

Preprint

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We report on the fabrication of Y-branched waveguide beam splitters with cladding structures in LiNbO3 crystal by direct femtosecond laser writing. The femtosecond laser writes tracks near the surface of the crystal, constructing a square structure based on the Type II geometry. The waveguides beam splitters support propagation of full-wavelength light from the visible to mid-infrared, which was experimentally and numerically investigated. In addition, it has been found that the guidance is only along the vertical (i.e., TM) polarization, which is due to the different refractive indices in the longitudinal and transverse directions. The femtosecond-laser writing here also represents an alternative for fabricating complex integrated light guiding in crystals.

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Micro-spectroscopy investigation on femtosecond laser writing of LiNbO3 crystal

Xiong

Zhang

et al. 2020

Optical Materials

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Femtosecond laser inscribed cladding waveguide structures in LiNbO3 crystal for beam splitters

Cited by 6 publications

References 30 publications

Femtosecond laser direct writing of flexibly configured waveguide geometries in optical crystals: fabrication and application

Femtosecond laser direct writing of flexibly configured waveguide geometries in optical crystals: fabrication and application

Three-dimensional polarization-dependent full-wavelength beam splitter written by femtosecond laser in LiNbO3 crystal

Micro-spectroscopy investigation on femtosecond laser writing of LiNbO3 crystal

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