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Anti-Stokes Line in an Index-Guiding Photonic Crystal Fibre with Two Zero-Dispersion Wavelengths

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Chinese Physics Letters 2008年第6期25卷 2055-2057页

作者：王伟高飞侯蓝田周桂耀 Institute of Infrared Optical fibers and Sensors Yanshan University Qinhuangdao 066004 Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao 066004

An index-guiding photonic crystal fibre with a small hole in the core is fabricated. The simulated results show that the first higher order mode possesses two zero-dispersion wavelengths, and the phase-matching is possible in the anomalous dispersion regime between the two zero-dispersion wavelengths. Using 200 fs Ti： sapphire laser of 820, 830 and 840nm, the anti-Stokes line around 530nm can be generated efficiently. The maximum ratio of the anti-Stokes signal energy to the pump component in the output spectrum is estimated to be 1.03 and the conversion efficiency is above 50%.

关键词： MICROSTRUCTURED OPTICAL-fibers MULTIPOLE METHOD holey fibers GENERATION EFFICIENT

Properties of Zero Dispersion Wavelengths in Silica Strands and Photonic Crystal Fibres

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Chinese Physics Letters 2008年第3期25卷 993-995页

作者：张德生盛秋琴董孝义 Institute of Physics Science Nankai University Tianjin 300071

To design and calculate the zero-dispersion wavelength is one of the important aspects for highly nonlinear photonic crystal fibres. By using the air filling fraction f defined as f = （ 6d） / （ 2π∧ ） here for the cladding effective index, and the step effective index model, the relationship between the properties of chromatic dispersion and the two different structures has been analysed. It is pointed that the variation of the zero dispersion wavelength is insensitive to the core diameter change in one range of core diameter D, while keeping the air filling fraction f constant. In the other range of core diameter D, the photonic crystal fibres have the best nearly-zero ultraflattened dispersion. These properties are significant to the design of chromatic dispersion and zero dispersion wavelength in photonic crystal fibres.

关键词： FLATTENED DISPERSION holey fibers INDEX

A novel high birefringence equal diameter circular-hole photonic crystal fiber

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Optoelectronics Letters 2017年第5期13卷 349-353页

作者：郭俊启钟懿刘宇杨晓辉肖明朗周敏 Chongqing Municipal Key Laboratory of Photoelectronic Information Sensing and Transmitting Technology Chongqing University of Posts and Telecommunications

A novel equal diameter circular-hole photonic crystal fiber(PCF) with high birefringence is proposed and numerically analyzed by employing the finite-element method. The proposed PCF's birefringence is 10^(-3), which can reach 2 orders higher than that of traditional high birefringence fiber, and this equal diameter circular-hole structure reduces the difficulty of the actual drawing process. The effect of different parameters on the birefringence of this PCF is investigated, and the application of the Sagnac interferometer based on fiber filling technology in temperature sensing is studied. The result shows that the high birefringence PCF can be used in both optical communication and optical sensing fields.

关键词： Birefringence Crystal whiskers fibers Finite element method holey fibers Nonlinear optics Optical communication

Study of ultraflattened dispersion square-lattice photonic crystal fiber with low confinement loss

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Optoelectronics Letters 2009年第2期5卷 124-127页

作者：谭晓玲耿优福田震王鹏姚建全 College of Precision Instrument and Optoelectronics Engineering Institute of Laser and Optoelectronics Tianjin UniversityTianjin 300072 China Key Laboratory of Optoelectric Information Science and Technology Ministry of Education Tianjin UniversityTianjin 300072 China

A new type ultraflattened dispersion square-lattice photonic crystal fiber with two different air-hole diameters in cladding region is proposed and the dispersion is investigated using a compact 2-D finite difference frequency domain method with the anisotropic perfectly matched layers (PML) absorbing boundary conditions. Through numerical simulation and opti- mizing the geometrical parameters, we find that the photonic crystal fibers proposed can realize ultraflattened dispersion of 0±0.06 ps/(km·nm) in wa...

关键词： Computer simulation Crystal whiskers Dispersions Frequency domain analysis holey fibers Laser pulses Nonlinear optics Numerical methods

Temperature-insensitive refractive index sensor based on Mach–Zehnder interferometer with two microcavities

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Chinese Optics Letters 2017年第2期15卷 25-29页

作者：汪银风王素梅姜澜黄华张柳超王鹏吕灵亚曹志涛 Laser Micro/Nano Fabrication Laboratory School of Mechanical Engineering Beijing Institute of Technology Beijing 100081 China Vibration and Noise Control Laboratory School of Mechanical Engineering Beijing Institute of Technology Beijing 100081 China School of Optoelectronics Beijing Institute of Technology Beijing 100081 China

We propose a temperature-insensitive refractive index（RI） fiber sensor based on a Mach–Zehnder interferometer. The sensor with high sensitivity and a robust structure is fabricated by splicing a short photonic crystal fiber（PCF） between two single-mode fibers, where two microcavities are formed at both junctions because of the collapse of the PCF air holes. The microcavity with a larger equatorial dimension can excite higher-order cladding modes, so the sensor presents a high RI sensitivity, which can reach 244.16 nm/RIU in the RI range of1.333–1.3778. Meanwhile it has a low temperature sensitivity of 0.005 nm/°C in the range of 33°C–360°C.

关键词： Crystal structure holey fibers Interferometers Mach Zehnder interferometers Microcavities Nonlinear optics Optical fiber fabrication Photonic crystal fibers Refractometers Single mode fibers Temperature