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Circular cladding waveguides in Pr:YAG fabricated by femtosecond laser inscription:Raman,luminescence properties and guiding performance

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Opto-Electronic Advances 2021年第2期4卷 12-18页

作者： Quanxin Yang Hongliang Liu Shan He Qingyu Tian Bin Xu Pengfei Wu Institute of Modern Optics Nankai UniversityTianjin 300350China Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology Tianjin 300350China Tianjin Key Laboratory of Micro-scale Optical Information Science and Technology Tianjin 300350China Department of Electronic Engineering Xiamen UniversityXiamen 361005China State Key Laboratory of Crystal Materials Shandong UniversityJinan 250100China

We report on the fabrication of circular cladding waveguides with cross-section diameters of 60−120μm in Pr:YAG crystal by applying femtosecond laser *** fabricated waveguides present 2D guidance on the cross-section and fairly low propagation *** high-order guiding modes are observed in waveguides with different *** simulation results reveal the origin of a specific kind of guiding *** micro-Raman(μ-Raman)experiments demonstrate the modification effects in femtosecond laser affected areas and ascertain the refractive index induced guiding *** addition,luminescence emission properties of Pr3+ions at waveguide volume are well preserved during the femtosecond laser inscription process,which may result in a potential high-power visible waveguide laser.

关键词： femtosecond laser inscription cladding waveguides Pr:YAG crystal luminescence emission

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

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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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Near-infrared lasing and tunable upconversion from femtosecond laser inscribed Nd,Gd:CaF_(2)waveguides

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Chinese Optics Letters 2021年第8期19卷 6-11页

作者： Ruonan Li Lifei Sun Yangjian Cai Yingying Ren Hongliang Liu Mark D.Mackenzie Ajoy K.Kar Center of Light Manipulations and Applications&Shandong Provincial Key Laboratory of Optics and Photonic Device School of Physics and ElectronicsShandong Normal UniversityJinan 250014China Institute of Modern Optics Nankai UniversityTianjin 300350China Institute of Photonics and Quantum Sciences Heriot-Watt UniversityEdinburgh EH144ASUK

Optical channel waveguides with depressed cladding configurations have been produced in Nd,Gd∶CaF_(2)laser crystals by using ultrafast laser *** properties are investigated in terms of guiding behaviors and localized laserinduced lattice *** an optical pump of 808 nm light,continuous-wave waveguide lasing at 1.06μm is achieved,with a single-mode operation and a minimum lasing threshold of 98.8 m ***,the visible emissions of Nd^(3+)with short wavelengths ranging from 415 nm to 550 nm and long wavelengths from 550 nm to 625 nm are observed upon 808 nm laser excitation via the up-converted *** intensity ratios of two wavelength ranges are proved to be tunable through changing the pumping polarizations.

关键词： femtosecond laser inscription optical waveguide CaF_(2)crystal laser upconversion

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Sensing Properties of femtosecond laser-Inscribed Long Period Gratings in Photonic Crystal Fiber

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Photonic Sensors 2011年第3期1卷 228-233页

作者： Kyriacos KALLI Tom ALLSOP Kaimin ZHOU Graham SMITH Michael KOMODROMOS David WEBB Ian BENNION Nanophotonics Research Laboratory Department of Electrical Engineering and Information Technology CyprusUniversity of Technology Limassol 3036 Cyprus photonics Research Group Aston University Birmingham B4 7ET United Kingdom Department of Electrical Engineering Frederick University Filokyprou 7 Nicosia Cyprus

The use of near infrared, high intensity femtosecond laser pulses for the inscription of long period fiber gratings in photonic crystal fiber is reported. The formation of grating structures in photonic crystal fiber is complicated by the fiber structure that allows wave-guidance but that impairs and scatters the femtosecond inscription beam. The effects of symmetric and asymmetric femtosecond laser inscriptions are compared and the polarization characteristics of long period gratings and their responses to external perturbations are reported.

关键词： Fiber gratings femtosecond laser inscription photonic crystal fiber

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