- 标题
- 摘要
- 关键词
- 实验方案
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Crosstalk Limitations due to Intercore Coupling on the BER Performance of an Optical Communication System with Homogeneous Multi-core Fiber
摘要： The effect of crosstalk due to inter-core coupling on the bit error rate (BER) performance of a fiber optic communication link with a homogeneous multi-core optical fiber (MCF) and a direct detection receiver with optical preamplifier is analytically evaluated and presented in this paper. Coupling coefficients due to inter-core coupling in a 7-core MCF is evaluated numerically with as a function of core-to-core distance (pitch) and relative refractive index contrast. Coupling length is determined against various index contrasts and at different core pitches. Crosstalk power, Signal to Crosstalk plus Noise Ratio (SCNR), BER and power penalty at any output core with light launched into other core of a 7-core MCF are determined analytically. The results show that there is mentionable deterioration in BER performance due to coupling induced crosstalk, and system suffers distinct power penalty at a given BER. For example, power penalty at BER of 10e-9 is found to be 4.0 dB and 4.3 dB for a MCF link of 10 km corresponding to relative refractive index difference of 0.0036 and 0.0030, respectively, for a pitch value of 30 μm and core radius of 4.5 μm.
关键词： Bit Error Rate,coupling length,mode coupling,coupling coefficient,multi-core fiber,crosstalk
更新于2025-09-16 10:30:52
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Small coupling length with a low confinement loss dual-core liquid infiltrated photonic crystal fiber coupler
摘要： In this paper, a dual-core liquid ?lled photonic crystal ?ber coupler (PCFC) with rectangular (RPCFC) and hexagonal (HPCFC) geometry is presented from the 1200 to 1800 nm wavelength range. In the proposed design, super ?int (SF10) glass is used as the background material and water, chloroform, and benzene are in?ltrated in the dual-core, independently. The properties of the guided modes are studied by the ?nite di?erence time domain (FDTD) method with a perfectly matched layer (PML) boundary condition. Results reveal very small con?nement loss with a low coupling length and birefringence for the wide wavelength range. At the 1.55 μm wavelength, RPCFC shows 0.000318, 0.000358, and 0.000379 m coupling lengths for the water, chloroform, and benzene ?lled dual-core, respectively. Additionally, the con?nement loss of 1.57×10?7, 1.22×10?7, and 1.05×10?7 db/km is achieved through RPCFC. Moreover, both the PCFCs present a small polarization variation. Therefore, the proposed PCFC models can be used in optical communication systems, and polarization-independent and high temperature-sensitive applications areas.
关键词： coupling length,liquid filled,birefringence,dual-core,photonic crystal fiber coupler,confinement loss
更新于2025-09-10 09:29:36
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Enhanced sensitivity of hemoglobin sensor using dual-core photonic crystal fiber
摘要： A Hemoglobin (Hb) biosensor based on dual-core photonic crystal fiber is proposed and analyzed. In this paper, the effective refractive index dependency on the Hb concentration within a blood sample is utilized in obtaining the transmission spectrum variation. The results are calculated using full vectorial finite element method. Through this study, the effect of the structure geometrical parameters on the sensor performance is optimized to maximize the sensor sensitivity. The numerical results show a sensitivity of 8.013 nm/g/dL for the X-polarized mode at 3.7 cm fiber length and 7.68 nm/g/dL for the Y-polarized mode at 3.2 cm fiber length of the proposed sensor.
关键词： Coupling length,Finite element method,Transmission spectrum,Dual-core photonic crystal fiber,Hemoglobin concentration
更新于2025-09-10 09:29:36
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[IEEE 2018 IEEE 7th International Conference on Photonics (ICP) - Langkawi, Malaysia (2018.4.9-2018.4.11)] 2018 IEEE 7th International Conference on Photonics (ICP) - Design of a Grating Assisted Mode-Division Multiplexer
摘要： This paper presents design of a grating assisted mode-division multiplexer in silicon slab waveguide with 5 mode channels using coupled mode theory and transfer matrix method.
关键词： mode-division multiplexing,co-directional coupling,coupling length,contra-directional coupling,grating
更新于2025-09-09 09:28:46