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Highly Efficient Two-Channel Drop filter of Single Photons with One Drop Waveguide

Journal of Modern Physics 2023年第2期14卷 101-110页

作者： Jinsong Huang Ximeng Feng School of Information Engineering Jiangxi University of Science and Technology Ganzhou China

A novel double-channel drop filter of single photons with only a drop waveguide is proposed. In the structure, two microresonators with a qubit are used to connect the drop waveguide and the bus waveguide with a reflector. By tuning the system parameters, multiple wavelengths with high drop efficiencies in two output channels of the drop waveguide are obtained. As the reflector is independent on its exact location, and one drop waveguide with two drop channels saves the integrated space, this may suggest a potential filtering device which functions in photonic integrated circuits and dense wavelength division multiplexing communication.

关键词： optical filter Scattering Theory optical Waveguide Microresonator

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Controlling the Bandgaps of One-Dimensional TiO₂/SiO₂, TiO₂/SnO₂, and SiO₂/SnO₂ Photonic Crystals Using the Transfer Matrix Method

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Optics and Photonics Journal 2022年第7期12卷 171-189页

作者： Fatimah Alamrani Edreese Alsharaeh College of Science and General Studies Alfaisal University Riyadh Saudi Arabia

One-dimensional photonic crystals (1D PhCs) have a unique ability to control the propagation of light waves, however certain classes of 1D oxides remain relatively unexplored for use as PhCs. Specifically, there has not been a comparative study of the three different 1D PhC structures to compare the influence of layer thickness, number, and refractive index on the ability of the PhCs to control light transmission. Herein, we use the transfer matrix method (TMM) to theoretically examine the transmission of 1D PhCs composed of layers of TiO2/SiO2, TiO2/SnO2, SiO2/SnO2, and combinations of the three with various top and bottom layer thicknesses to cover a substantial region of the electromagnetic spectrum (UV to NIR). With increasing layer numbers for TiO2/SiO2 and SiO2/SnO2, the edges became sharper and wider and the photonic bandgap width increased. Moreover, we demonstrated that PhCs with significantly thick TiO2/SiO2 layers had a high transmittance for a wide bandgap, allowing for wide-band optical filter applications. These different PhC architectures could enable a variety of applications, depending on the properties needed.

关键词： One-Dimensional Photonic Crystal Photonic Bandgap Transfer Matrix Method optical filter Metal Oxides

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Ultra-narrow bandwidth optical filters consisting of one-dimensional photonic crystals with anomalous dispersion materials

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Chinese Physics B 2005年第12期14卷 2474-2477页

作者：刘江涛周云松王福合顾本源 Department of Physics Capital Normal University Beijing 100037 China Institute of Physics Chinese Academy of Sciences Beijing 100080 China

We present a new type of optical filter with an ultra-narrow bandwidth and a wide field-of-view （FOV）. This kind of optical filter consists of one-dimensional photonic crystal （PC） incorporating an anomalous-dispersion-material （ADM） with, for instance, an anomalous dispersion of 6P3/2←6S1/2 hyperfine structure transition of a caesium atom. The transmission spectra of optical filters are calculated by using the transfer-matrix method. The simulation results show that the designed optical filter has a bandwidth narrower than 0.33GHz and a wide FOV of ±30°as well. The response of transmission spectrum to an external magnetic field is also investigated.

关键词： photonic crystals anomalous dispersion optical filter

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Recent progress in multi-wavelength fiber lasers:principles,status,and challenges

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Chinese Optics Letters 2020年第4期18卷 36-62页

作者：陈华龙蒋先涛徐世祥张晗 SZU-NUS Collaborative Innovation Center for Optoelectronic Science&Technology Collaborative Laboratory of 2D Materials for Optoelectronic Science and Technology of Ministry of EducationCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060China

In recent years,multi-wavelength fiber lasers play a significant role in plenty of fields,ranging from optical communications to mechanical processing and laser biomedicine,owing to their high beam quality,low cost,and excellent heat dissipation properties.Benefitting from increasing maturity of optical elements,the multi-wavelength fiber laser has made rapid developments.In this review,we summarize and analyze diverse implementation methods covering continuous wave and pulsed fiber lasers at room temperature conditions:inserting an optical filter device and intensity-dependent loss structure in the resonant cavity,and applying ultrafast nonlinear optical response of materials and a dual-cavity structure.Finally,future challenges and perspectives of the multi-wavelength fiber laser are discussed and addressed.

关键词： multi-wavelength fiber laser optical filter nonlinear polarization rotation nonlinear amplification loop mirror 2D materials

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