搜索结果: 1-15 共查到“光学工程 OCDMA”相关记录24条 . 查询时间(0.272 秒)
This investigation proposes and experimentally demonstrates an optical code-division multiple-access (OCDMA) light source using a directly modulated Fabry–Pérot laser diode in an external injection sc...
Demonstration of Hybrid Using ±π/2- and 0/π-Phase-Shifted SSFBG En/decoders in the 4×10Gbit/s OCDMA system
Fiber optics communications Fiber Bragg gratings Optical security and encryption
2011/5/26
We develop the novel ±π/2-phase-shifted SSFBG en/decoders (31-chip 640Gchip/s)and verify the improved security performance. We also demonstrate the mixed use of 0/π- and ±π/2-phase-shifted SSFBG en/de...
100-km uplink transmission of 10G- and 1G-ONU co-existing TDM-OCDMA-PON system using dual-rate burst-mode receiver
Networks Optical communications
2011/5/22
In a cost-effective TDM-OCDMA-PON system without en/decoder at each ONU, the uplink dispersion-compensation-free 10 Gbps/1 Gbps-co-existing TDM x 4-OCDMA transmission over 100 km SMF is demonstrated b...
Demonstration of Low-Cost Uplink Transmission in a Coherent OCDMA PON Using Gain-Switched Fabry–Perot Lasers With External Injection
Fabry–Perot (FP) laser gain-switching optical code-division multiple access (OCDMA) passive optical network (PON)
2010/12/2
We propose and demonstrate a simple and low-cost uplink transmission scheme for coherent optical code-division multiple access (OCDMA) passive optical networks (PONs), using gain-switched Fabry-Perot ...
Electrically Processed OCDMA System Based on Spatial Coding and Subcarrier Multiple xing
Electrically Processed OCDMA System Spatial Coding Subcarrier Multiple xing
2010/12/2
A low-cost electrically processed OCDMA system based on spatial coding and subcarrier multiplexing is proposed. The simulation shows that at least 10 simultaneous users can be supported in a 16-code O...
OCDMA PON supporting ONU internetworking based on gain-switched Fabry–Perot lasers with external dual-wavelength injection
Fiber optics and optical communications Fiber optics communications
2010/7/20
We propose and demonstrate an OCDMA-PON scheme with optical network unit (ONU) internetworking capability, which utilizes low-cost gain-switched Fabry-Pérot (GS-FP) lasers with external dual-wavelengt...
Bit error rate (BER) performance of return-to-zero and non-return-to-zero data signals optical code division multiple access (OCDMA) system based on AND detection scheme in fiber-to-the-home (FTTH) networks
spectral amplitudes coding – optical code division multiple access detectionscheme subtraction technique non-return-to-zero (NRZ) and return-to-zero (RZ) pulse generator
2010/7/19
In this paper, we will focus on the modulation format used to create the optical pulses, which are
return-to-zero (RZ), and non-return-to-zero (NRZ). Bit error rate (BER) performance is evaluated
ba...
Stealth Transmission of Time Domain Spectral Phase Encoded OCDMA Signal over WDM System
Fiber optics communications Optical security encryption
2010/6/9
1.25Gbps time domain spectral phase encoded OCDMA signal with 32-chip, 40Gchip/s optical codes has been stealthily transmitted over public 10Gbps WDM channel. Error-free transmission has been achieved...
Demonstration of 10Gbps, 4-user, OCDMA Transmission over 59km Single Mode Fiber without Inline Dispersion Compensation
Fiber optics communication Multiplexing
2010/6/9
Multi-user, 10Gbps, optical code division multiple access (OCDMA) transmission over 59 km of standard single mode fiber without inline dispersion compensation is experimentally demonstrated for the fi...
Impact of Crosstalk in Capacity performance of WDM/OCDMA System
Fiber optics communications Networks
2010/6/4
The capacity of WDM/OCDMA system is analyzed under time-wavelength domain crosstalk to determine the simultaneous capacity threshold. The system’s crosstalk, channel spacing and datarate are optimized...
A Novel OCDMA Thresholder Based on Nonlinear Polarization Rotation
OCDMA MAI Thresholder Nonlinear fiber optics
2009/12/2
A novel low-power and cost-effective OCDMA thresholder based on nonlinear polarization rotation (NPR) is proposed. The excellent performance and feasibility of the NPR thresholder are experimentally d...
Experimental demonstration of a centralized light source OCDMA-PON based on polariza tion multiplexing
Optical Code Division Multiple Access (OCDMA) passive optical network (PON) polarization access network
2009/12/2
A novel centralized light source OCDMA PON without wavelength filters is proposed and experimentally demonstrated. The OCDMA coded signals and the unmodulated clock pulses are polarization-multiplexed...
简要介绍了OCDMA系统的原理，分析了码型和码容量、地址序列的扩频作用对OCDMA安全性的影响，结合完全无差错探测几率给出完全探测到正确地址码所需探测次数的期望值，并以此重点分析了码字探测对OCDMA安全性的影响，比较分析了OCDMA技术与现代光纤保密通信技术的关系，给出了增加OCDMA系统安全性而采取的一些措施。
Demonstration of Asynchronous,10Gbps OCDMA PON system with Colorless and Sourceless ONUs
Asynchronous OCDMA PON system Colorless Sourceless ONUs
2009/7/16
We experimentally demonstrate for the first time an error-free asynchronous, 10-Gbps full-duplex DPSK OCDMA system that does not require any laser source at the users premises.
8x8 Full-duplex Demonstration of Asynchronous, 10Gbps, DPSK- OCDMA System using Apodized SSFBG and multi-port En/Decoder
8x8 Full-duplex Demonstration DPSK- OCDMA System Apodized SSFBG multi-port En/Decoder
2009/7/16
We develop a novel apodized, 16-level-phase-shifted SSFBG encoder/decoder, which can improve the system performance of OCDMA system. Error free (BER<10 -9 ) transmissions of 8x8 full-duplex, asynchron...