Papillon-Lefevre syndrome (PLS) is a rare recessive autosomal disease which occurs with palms and soles hyperkeratosis as well as primary and permanent teeth periodontal loss. Recently, it has been proved that a mutat...Papillon-Lefevre syndrome (PLS) is a rare recessive autosomal disease which occurs with palms and soles hyperkeratosis as well as primary and permanent teeth periodontal loss. Recently, it has been proved that a mutation at Cathepsin gene C is the genetic cause of PLS. All primary and permanent teeth of the patients are lost at ages 2 or 3 because of serious alveolar bone destruction. This paper presents a complete case of prosthetic treatment of an 8-year old girl with PLS.展开更多
We study the spatiotemporal evolution of the electromagnetic field inside a microresonator showing an anomalous dis- persion at the pump wavelength by using the normalized Lugiato--Lefever equation. Unlike the traditi...We study the spatiotemporal evolution of the electromagnetic field inside a microresonator showing an anomalous dis- persion at the pump wavelength by using the normalized Lugiato--Lefever equation. Unlike the traditional single continuous wave （CW） pumping, an additional pump source consisting of periodical pulse train with variable repetition rate is adopted. The influences of the microresonator properties and the pump parameters on the field evolution and the electromagnetic field profile are analyzed. The simulation results indicate that, in the anomalous dispersion regime, both increases of the input pulse amplitude and the repetition frequency can result in the field profiles consisting of multiple peaks. A series of equidistant pulses can also be obtained by increasing the CW pump power. In addition, we find that a large physical detuning between the pump laser carrier and the cavity resonance frequency also causes the splitting of the inside field.展开更多
Kerr frequency combs have been attracting significant interest due to their rich physics and broad applications in metrology,microwave photonics,and telecommunications.In this review,we first introduce the fundamental...Kerr frequency combs have been attracting significant interest due to their rich physics and broad applications in metrology,microwave photonics,and telecommunications.In this review,we first introduce the fundamental physics,master equations,simulation methods,and dynamic process of Kerr frequency combs.We then analyze the most promising material platform for realizing Kerr frequency combs—silicon nitride on insulator(SNOI)in comparison with other material platforms.Moreover,we discuss the fabrication methods,process optimization as well as tuning and measurement schemes of SNOI-based Kerr frequency combs.Furthermore,we highlight several emerging applications of Kerr frequency combs in metrology,including spectroscopy,ranging,and timing.Finally,we summarize this review and envision the future development of chip-scale Kerr frequency combs from the viewpoint of theory,material platforms,and tuning methods.展开更多
文摘Papillon-Lefevre syndrome (PLS) is a rare recessive autosomal disease which occurs with palms and soles hyperkeratosis as well as primary and permanent teeth periodontal loss. Recently, it has been proved that a mutation at Cathepsin gene C is the genetic cause of PLS. All primary and permanent teeth of the patients are lost at ages 2 or 3 because of serious alveolar bone destruction. This paper presents a complete case of prosthetic treatment of an 8-year old girl with PLS.
基金Project supported by the National Major Scientific Instrumentation Development Program of China(Grant No.2011YQ120022)CAS/SAFEA International Partnership Program for Creative Research Teams,Chinathe National Natural Science Foundation of China(Grant No.61275164)
文摘We study the spatiotemporal evolution of the electromagnetic field inside a microresonator showing an anomalous dis- persion at the pump wavelength by using the normalized Lugiato--Lefever equation. Unlike the traditional single continuous wave （CW） pumping, an additional pump source consisting of periodical pulse train with variable repetition rate is adopted. The influences of the microresonator properties and the pump parameters on the field evolution and the electromagnetic field profile are analyzed. The simulation results indicate that, in the anomalous dispersion regime, both increases of the input pulse amplitude and the repetition frequency can result in the field profiles consisting of multiple peaks. A series of equidistant pulses can also be obtained by increasing the CW pump power. In addition, we find that a large physical detuning between the pump laser carrier and the cavity resonance frequency also causes the splitting of the inside field.
基金the National Key Research and Development Program of China(2021YFA1401000,2021YFB2801600,and 2017YFF0206104)National Natural Science Foundation of China(62075114 and 62175121)the Beijing Natural Science Foundation(4212050)。
文摘Kerr frequency combs have been attracting significant interest due to their rich physics and broad applications in metrology,microwave photonics,and telecommunications.In this review,we first introduce the fundamental physics,master equations,simulation methods,and dynamic process of Kerr frequency combs.We then analyze the most promising material platform for realizing Kerr frequency combs—silicon nitride on insulator(SNOI)in comparison with other material platforms.Moreover,we discuss the fabrication methods,process optimization as well as tuning and measurement schemes of SNOI-based Kerr frequency combs.Furthermore,we highlight several emerging applications of Kerr frequency combs in metrology,including spectroscopy,ranging,and timing.Finally,we summarize this review and envision the future development of chip-scale Kerr frequency combs from the viewpoint of theory,material platforms,and tuning methods.
