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Femtosecond laser-inscribed optical waveguides in dielectric crystals:a concise review and recent advances

Advanced Photonics 2022年第2期4卷 23-51页

作者： Lingqi Li Weijin Kong Feng Chen Qingdao University College of Physics ScienceCenter for Marine Observation and CommunicationsQingdaoChina Shandong University School of PhysicsState Key Laboratory of Crystal MaterialsJinanChina

Femtosecond laser inscription or writing has been recognized as a powerful technique to engineer various materials toward a number of *** efficient modification of refractive indices of dielectric crystals,optical waveguides with diverse configurations have been produced by femtosecond laser *** waveguiding properties depend not only on the parameters of the laser writing but also on the nature of the *** mode profile tailoring and polarization engineering are realizable by selecting appropriate fabrication *** addition,regardless of the complexity of crystal refractive index changes induced by ultrafast pulses,several three-dimensional geometries have been designed and implemented that are useful for the fabrication of laser-written photonic *** intriguing devices,e.g.,waveguide lasers,wavelength converters,and quantum memories,have been made,exhibiting potential for applications in various *** work gives a concise review of the femtosecond laser-inscribed waveguides in dielectric crystals and focuses on the recent advances of this research area,including the fundamentals,fabrication,and selected photonic applications.

关键词： femtosecond laser writing femtosecond laser inscription optical waveguides dielectric crystals laser crystals nonlinear optical crystals waveguide lasers frequency/wavelength conversion quantum photonic chip quantum memories

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

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Opto-Electronic Advances 2020年第10期3卷 1-12页

作者： Yuechen Jia Shixiang Wang Feng Chen School of Physics State Key Laboratory of Crystal MaterialsShandong UniversityJinan 250100China

Optical waveguides are far more than mere connecting elements in integrated optical systems and *** 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 ***-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 *** 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 *** review emphasizes FsLDW fabrication of waveguide structures with 3D layouts in dielectric *** functionalities as passive and active photonic devices are also demonstrated and discussed.

关键词： femtosecond laser micromachining optical waveguide dielectric crystals photonic devices

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