共查询到20条相似文献,搜索用时 118 毫秒
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为解决脉冲电场测试系统中的供电问题,设计了一套激光光纤供电系统,该系统由激光器、多模光纤及光电池构成。重点研究了激光器与光纤的耦合问题,设计了透镜系统对激光器输出光束进行准直和压缩。通过MOCVD法研制了GaAs光电池,并制作了椭球形"光伏眼"来提高光电转换效率。仿真和实验表明:采用透镜耦合时,激光器与光纤的耦合效率可达80%以上,远远高于直接耦合时的16%,改进后的"光伏眼"耦合效率相比直接耦合时提高了54.5%,激光供电系统的转化效率在40%以上。该系统的研制为解决脉冲电场的供电问题提供了一种方案。 相似文献
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提出了一种新型的、基于单个径向渐变折射率(GRIN)透镜的1×N光纤耦合方法,并基于水平入射以及垂直斜面入射光线的传播方程建立了用于求解点光源发出的光束在GRIN透镜斜面入射后的成像点的计算方法。通过将透镜前端面加工成多斜面棱镜,将输入光分为多束,光束聚焦位置可以通过系统参数来调整;被分割开的光束经会聚、优化像差后,实现1×N低损耗耦合,并进行了仿真研究;通过优化斜面倾角、物距等关键参数实现了光纤低损耗耦合。该设计方案结构简单,易于装配,为各类光子晶体光纤、多芯光纤、光纤组束和光纤合光提供了实用的耦合方法。 相似文献
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阵列半导体激光器的光束参数测量与光纤耦合 总被引:4,自引:0,他引:4
采用ISO推荐的方法测量了发光面为 1μm× 15 0 μm的阵列半导体激光器的光束半径、远场发散角、束腰位置、瑞利长度 ,并根据测量结果计算了光束传输因子 (M2 因子 )。以此为基础 ,研究了半导体激光器光束的快轴准直以及光纤耦合技术 ,采用微柱面透镜准直后 ,阵列半导体激光器快轴方向发散角可减小到 0 .48°。设计了光纤耦合光学系统 ,与 10 0 μm光纤耦合时的耦合效率为 71.0 % ,与 2 0 0 μm光纤耦合时的效率为 83.4%。 相似文献
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透镜导管耦合系统中光线三维追迹模拟分析 总被引:2,自引:0,他引:2
半导体激光器抽运耦合系统是固体激光器的重要组成部分.非成像系统空心透镜导管构成的耦合系统非常适用于大功率的半导体抽运阵列.为了给出透镜导管耦合系统的最佳结构,需要研究抽运光束在耦合系统内及输出面的分布.利用几何光学理论,在三维空间内,建立了空心透镜导管中抽运光束传播的数学模型,推导了光束传播的三维轨迹方程;在全三维光线追迹的理论分析基础上,开发了模拟透镜导管耦合系统传输光线的3D计算机仿真软件;通过该软件可以自动获得全部抽运光线在透镜导管耦合系统中的真实传输路径及在耦合系统输出端面的分布.最后探讨了抽运光束通过空心透镜导管耦合系统后的能蕈转换效率.计算结果表明,空心透镜导管的能量转换效率可以达到96.08%以上. 相似文献
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在原有金属卤化物光源与光纤耦合结构的基础上,提出了一种新的光纤耦合方案,为了满足光供电系统的光功率需求,根据几何光学的理论,提出一种新的LED光源阵列排布方案。在对LED的发光特性研究的基础上,设计了一种新的光学准直方法,运用ZEMAX软件进行仿真,并对透镜参数进行了优化,准直结果角度控制在了±4°范围内。针对光束尺寸与光纤的匹配问题,进行了聚焦耦合设计,弥散斑的RMS尺寸大小为7.410μm,GEO点尺寸为16.091μm,光学系统95%以上的能量集中在20μm范围之内,达到了很好的耦合效果。 相似文献
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采用大口径、高功率激光二极管阵列的大型全固化二极管泵浦激光系统能够产生高功率、大能量、高重复频率和高光束质量的激光.为了实现对介质的高效泵浦,将空心透镜导管应用于大口径高功率激光二极管阵列耦合系统.基于3维光线追迹的数值计算方法,编制了LD纵向泵浦耦合系统模拟软件,对空心透镜导管进行模拟与设计,将发光面积超过100 cm2、功率达48 kW的二极管阵列发出的泵浦光,耦合到面积仅4 cm2的NdYLF中,在系统耦合效率超过70%的同时,增益介质表面泵浦场具有良好的均匀性. 相似文献
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G. B. Malykin I. M. Nefëdov I. A. Shereshevskii 《Radiophysics and Quantum Electronics》1994,37(10):847-852
We propose a method for calculating the degree of polarization of nonmonochromatic radiation as it propagates through a single-mode fiber optical waveguide (SMF), based on dividing the length of the fiber into segments equal to the depolarization length of the radiation in the SMF. We have obtained the dependences of the degree of polarization of the radiation on the length of the fiber for an SMF with strong and weak anisotropy. In the case of anisotropic SMF's characterized by weak coupling of orthogonal modes, the results match those obtained previously by other calculation methods. The results for weakly anisotropic SMF's characterized by strong coupling of orthogonal modes are obtained here for the first time.Institute of Applied Physics, Russian Academy of Sciences. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, No. 10, pp. 1311–1320, October, 1994. 相似文献
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Coupling a single-mode laser diode with 200 mW to a single-mode fiber (SMF) through an orthonormal aspherical cylindrical lens and a GRIN lens for the intersatellite optical communication system is proposed and demonstrated. We experimentally studied how the coupling efficiency changes with the SMF's position displacement and axial angle variation, and obtained 80 mW output power at the end of the SMF, which shows that the coupling units have satisfied the designed request. 相似文献
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This paper analyzes the coupling efficiency and optical feedback of the tapered fiber end with a high-index hemiellipsoidal microlens. Such a device has been used as a coupler of traveling-wave semiconductor laser amplifier (TW-SLA) to single mode fiber (SMF).
A theory of the calculation of coupling efficiency and optical feedback is presented including the effects of spherical aberration and Fresnel reflection of thick lens. In consideration of the large beam divergency of the TW-SLA chip, the finite transmission aperture is introduced.
The calculations are in agreement with experiment results and a group of optimum structure parameters of the coupler are given. 相似文献
A theory of the calculation of coupling efficiency and optical feedback is presented including the effects of spherical aberration and Fresnel reflection of thick lens. In consideration of the large beam divergency of the TW-SLA chip, the finite transmission aperture is introduced.
The calculations are in agreement with experiment results and a group of optimum structure parameters of the coupler are given. 相似文献
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We investigate the fundamental insertion loss due to mode mismatch in an optical link involving a single-mode fiber-optic (SMF) transmission with the insertion of a segment of a multimode Cr(4+)-doped fiber (MMCDF). With an MMCDF core diameter of approximately 15.5 microm that matches the SMF, we obtained coupling efficiencies of 60.3% to 87.5% in the entire transmission spectral range of 1,300 to 1,600 nm. The high coupling efficiency (or low insertion loss) makes it possible for the employment of the MMCDF as an inline ultrabroadband optical amplifier in an optical link for the entire transmission spectral range. 相似文献
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We experimentally demonstrate a new wavelength- and mode-selective coupler utilizing intermodal coupling between a standard single-mode fiber (SMF) and a hollow optical fiber (HOF). The fabricated device routes optical signals such that a 1.3-microm signal is directed to the HOF port, adiabatically converting the LP(01) mode into a ring-shaped mode, which can be further connected to a gigabit ethernet link, reducing the differential mode-dispersion penalty. Optical signals near 1.5microm , meanwhile, stay in the LP(01) mode of the SMF arm for further connection to conventional wavelength-division multiplexing links based on erbium-doped fiber amplifiers. The performance of the device is characterized in terms of insertion loss, channel isolation, and mode-conversion efficiency. 相似文献
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ABCD matrix model of quadric interface-lensed fiber and its application in coupling efficiency calculation 总被引:1,自引:0,他引:1
In order to simplify the theoretical coupling efficiency calculation of a laser diode (LD) to a single-mode fiber (SMF) with a quadric lens formed on the fiber tip, based on the Gaussian beam approximation, using the ABCD matrix method the relationship between the coupling efficiency and the structure parameters of quadric surface-lensed fiber is studied and analyzed in detail, and the coupling efficiency can reach as high as 99.87% with optimizing parameters of lensed fiber in theoretical simulation. Meanwhile, under paraxial approximation, the ABCD matrix for refraction of different quadric surface micro-lens can be formulated as a unified expression. This result can give some guidance suggestions for fabricating the quadric interface-lensed fiber. 相似文献
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Jozef Chovan Martin Tomáška František Uherek Daniel Haško Dana Seyringer Lenka Gajdošová 《Fiber and Integrated Optics》2020,39(1):24-38
ABSTRACTProgress in integrated photonics enables development of photonics integrated circuits (PIC) with new unique properties and overcomes current limits in information and communication technologies. The effective coupling of optical radiation between telecom optical fiber and photonic integrated circuits is necessary. To address these challenges, we present our concept of photonics integrated circuit (PIC) fully customized packaging with microwave, direct current, and fiber array ports with automated active alignment system. Automated adjustment and coupling of single-mode fiber (SMF) arrays with 8 fibers to PIC based on the detection of edges and markers on PIC and SMF arrays were successfully realized. 相似文献
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An analysis of the etching process for forming a truncated conical microlens on the end surface of a single-mode fibre (SMF) so as to improve its coupling efficiency with a laser diode (LD) has been carried out. This is followed by a simple geometric-optics and electromagnetic analysis to calculate this coupling efficiency, when the lens is formed on a SMF fabricated by the MCVD technique. The theory is supported by measurements which gave a maximum coupling efficiency of 57%. 相似文献