Asymmetric Nonlinear Optical Loop Mirror for All Optical Clock Extraction in Self-clocked Optical Transparent OTDM Network

１ＩｎｔｒｏｄｕｃｔｉｏｎＡｓａｅｆｅｃｔｉｖｅｗａｙｔｏｔａｋｅｆｕｌａｄｖａｎｔａｇｅｓｏｆｔｈｅｂａｎｄｗｉｄｔｈｏｆｔｈｅｆｉｂｅｒ,ｏｐｔｉｃａｌｔｉｍｅｄｉｖｉｓｉｏｎｍｕｌｔｉｐｌｅｘｉｎｇ（ＯＴＤＭ）ｔｅｃｈｎｏｌｏｇｙｈａｓｂｅｎｗ...     

Ultrafast Nonlinear Interferometer (UNI)Supported by National Nature Science Foundations of China and the High Technology Resource and Development Programme of China.

１ＩｎｔｒｏｄｕｃｔｉｏｎＵｌｔｒａｆａｓｔａｌｏｐｔｉｃａｌｔｉｍｅｄｉｖｉｓｉｏｎｄｅｍｕｌｔｉｐｌｅｘｅｒｗｉｌｂｅｋｅｙｄｅｖｉｃｅｉｎｆｕｔｕｒｅｏｐｔｉｃａｌｔｉｍｅｄｉｖｉｓｉｏｎｍｕｌｔｉｐｌｅｘｉｎｇ（ＯＴＤＭ）ｓｙｓｔｅｍｓ...     

Signal Demultiplexing from an 8 .2 ×2.5 Gbs OTDM Data Stream Using NOLM:Demonstration and Bit Error Rate Measurement

Ｉｎｔｒｏｄｕｃｔｉｏｎ　　Ｄｅｍｕｌｔｉｐｌｅｘｉｎｇｗｉｔｈｃｏｍｐｔｅｌｅｌｙａｌｌｏｐｔｉｃａｌｄｅｖｉｃｅｓｉｓａｋｅｙｔｅｃｈｎｏｌｏｇｙｉｎｏｐｔｉｃａｌｔｉｍｅｄｉｖｉｓｉｏｎｍｕｌｔｉｐｌｅｘｉｎｇ（ＯＴＤＭ）ｓｙｓｔｅｍ．ＳｉｎｃｅｔｈｅｒａｔｅｏｆａｍｕｌｔｉｐｌｅｘｅｄｓｔｒｅａｍｕｓｕａｌｌｙａｓｈｉｇｈａｓｔｅｎｓｏｒｈｕｎｄｒｅｄｓＧｂｉｔｓｓ，ｔｈｅｒｅｑｕｉｒｅｄｓｐｅｅｄｏｆｃｏｒｒｅｓｐｏｎｄｉｎｇｄｅｍｕｌｔｉｐｌｅｘｉｎｇｍｕｓｔｂｅａｄａｐｔａｂｌ…     

Transmission Characteristics of Several Kinds of Filters for WDM Optical Networking

１ＩｎｔｒｏｄｕｃｔｉｏｎＷａｖｅｌｅｎｇｔｈｄｉｖｉｓｉｏｎｍｕｌｔｉｐｌｅｘｉｎｇ（ＷＤＭ）ｉｓａｃｏｓｔｅｆｅｃｔｉｖｅｗａｙｔｏｍａｋｅｆｕｌｕｓｅｏｆｔｈｅｂｒｏａｄｂａｎｄｗｉｄｔｈｏｆｔｈｅｏｐｔｉｃａｌｆｉｂｅｒｗｈｅｎｔｈｅｔｒ...     

High Speed Demultiplexer Based on a Three-Wavelength SLA

１ＩｎｔｒｏｄｕｃｔｉｏｎＩｎｏｒｄｅｒｔｏｍｅｔｔｈｅｈｉｇｈｂａｎｄｗｉｄｔｈｒｅｑｕｉｒｅｍｅｎｔｉｎｏｐｔｉｃａｌｔｉｍｅｄｉｖｉｓｉｏｎｍｕｌｔｉｐｌｅｘ（ＯＴＤＭ）ｔｅｌｅｃｏｍｍｕｎｉｃａｔｉｏｎｓｙｓｔｅｍｓ，ｔｈｅｓｉｇｎａｌｍｕ...     

Analysis of Pulse Tolerance to Pump Depletion Induced Noise in DWDM Systems Using Distributed Fiber Raman Amplifiers

1　Ｉｎｔｒｏｄｕｃｔｉｏｎ　　ＧｒｏｗｉｎｇｃｏｍｍｕｎｉｃａｔｉｏｎｔｒａｆｆｉｃｄｅｍａｎｄｓｍｏｒｅｗａｖｅｌｅｎｇｔｈｓｔｏｂｅｕｓｅｄｉｎｏｐｔｉｃａｌＤＷＤＭ(ｄｅｎｓｅｗａｖｅｌｅｎｇｔｈｄｉｖｉｓｉｏｎｍｕｌｔｉｐｌｅｘｉｎｇ )ｓｙｓｔｅｍｓａｎｄｎｅｔｗｏｒｋｓ.ＯｐｔｉｃａｌｆｉｂｅｒＲａｍａｎａｍｐｌｉｆｉｅｒｗｉｔｈｉｔｓｗｉｄｅａｍｐｌｉｆｉｃａｔｉｏｎｂａｎｄｗｉｄｔｈａｎｄｆｌｅｘｉｂｌｅｃｅｎｔｅｒｗａｖｅｌｅｎｇｔｈｉｓｔｈｅｐｒｏｍｉｓｉｎｇｃａｎｄｉｄａｔｅ[…     

Design of Broadband L-band Erbium Doped Fiber Amplifier

1　Ｉｎｔｒｏｄｕｃｔｉｏｎ　　Ｗａｖｅｌｅｎｇｔｈ ｄｉｖｉｓｉｏｎｍｕｌｔｉｐｌｅｘｉｎｇ(ＷＤＭ )ｍｅｔｈｏｄｇｉｖｅｓａｓｏｌｕｔｉｏｎｏｆｄｅｍａｎｄｏｎｔｈｅｈｉｇｈｓｐｅｅｄａｎｄｈｉｇｈｃａｐａｃｉｔｙｔｒａｎｓｍｉｓｓｉｏｎ .ＯｎｅｏｆｔｈｅｋｅｙｔｅｃｈｎｏｌｏｇｙｏｆｔｈｅＷＤＭｔｒａｎｓｍｉｓｓｉｏｎｉｓｔｏｂｒｏａｄｅｎｂａｎｄｗｉｄｔｈｏｆｅｒｂｉｕｍ ｄｏｐｅｄｆｉｂｅｒａｍｐｌｉｆｉｅｒ (ＥＤＦＡ)ａｎｄｔｏｇｅｔｔｈｅｗｉｄｅｂａｎｄａｎｄｆｌａｔ ｇａｉｎＥＤＦＡ .…     

Theoretical Analysis and Experimental Research on Recordable Compact Disc with Dye Material

ＴｈｅｏｒｅｔｉｃａｌＡｎａｌｙｓｉｓａｎｄＥｘｐｅｒｉｍｅｎｔａｌＲｅｓｅａｒｃｈｏｎＲｅｃｏｒｄａｂｌｅＣｏｍｐａｃｔＤｉｓｃｗｉｔｈＤｙｅＭａｔｅｒｉａｌ￥ＷＡＮＧＳｈｉｙｏｎｇ；ＷＡＮＧＳｈｉｊｉｅ（ＳＡＳＴＤＯＤＣｏ．Ｌｔｄ．，Ｓｈｅｎｚｈ...     

Non-reflective Event Locating Based on Impulse Response in Optical Time-domain Measurement

１ＩｎｔｒｏｄｕｃｔｉｏｎＯｐｔｉｃａｌｔｉｍｅｄｏｍａｉｎｒｅｆｌｅｃｔｏｍｅｔｒｙ（ＯＴＤＲ）ｉｓａｃｏｍｍｏｎｌｙｕｓｅｄｔｅｃｈｎｉｑｕｅｆｏｒｃｈａｒａｃｔｅｒｉｚａｔｉｏｎａｎｄｆａｕｌｔｌｏｃａｔｉｎｇｏｆｏｐｔｉｃａｌｆｉｂｅｒｔｒａ...     

Laser Diode Pumped Unidirectional Ring Laser Resonator with AOM Q-switch

ＬａｓｅｒＤｉｏｄｅＰｕｍｐｅｄＵｎｉｄｉｒｅｃｔｉｏｎａｌＲｉｎｇＬａｓｅｒＲｅｓｏｎａｔｏｒｗｉｔｈＡＯＭＱ┐ｓｗｉｔｃｈＪ．Ｃｈｅｎ１）Ａ．Ｄｅｈｎ２）Ｈ．Ｊ．Ｅｉｃｈｌｅｒ２）Ａ．Ｈａａｓｅ２）Ｏ．Ｍｅｈｌ２）（１）ＮａｔｉｏｎａｌＫｅｙＬ...     

Realizing 20 Gbit/s OTDM Transmission over 50 km True-wave Fiber with Dispersion Compensation

20 Gbit/s OTDM transmission over 50 km true-wave fiber with dispersion compensation was realized for the first time in China. The power penalty is smaller than 8 dB. The following technology problems were solved: the generation and the compression of ultra-short optical pulse; low bits to high bits multiplexer; high bits to low bits demulitplexer; the clock extraction from high speed system, dispersion compensation.     

Numerical Study on the Performance in High bit rate Optical Communication Systems

1　Ｉｎｔｒｏｄｕｃｔｉｏｎ　　Ｄｅｓｐｉｔｅｔｈｅｇｒｅａｔｓｕｃｃｅｓｓｏｆｗａｖｅｌｅｎｇｔｈｄｉｖｉｓｉｏｎｍｕｌｔｉｐｌｅｘｅｄ (ＷＤＭ )ｓｙｓｔｅｍｓｉｎａｃｈｉｅｖｉｎｇｈｉｇｈ ｃａｐａｃｉｔｙｔｒａｎｓｍｉｓｓｉｏｎ ,ｔｈｅｒｅｒｅｍａｉｎｓｉｎｔｅｒｅｓｔｉｎｅｘｐｌｏｒｉｎｇｔｈｅｃａｐａｂｉｌｉｔｉｅｓｏｆｈｉｇｈｄａｔａｒａｔｅｉｎｓｉｎｇｌｅｃｈａｎｎｅｌｓｙｓｔｅｍｓ.Ｔｈｅｐｒｏｐａｇａｔｉｏｎｏｆｃｈｉｒｐｅｄｐｕｌｓｅｓｉｎｏｐｔｉｃａｌｆｉｂｅｒｓｉｓｏｆｇｒ…     

Broadband dispersion compensation of conventional single mode fibers using microstructure optical fibers

This paper presents a microstructure optical fiber for dispersion compensation in a wide range of wavelengths. The finite-element method with perfectly matched absorbing layers boundary condition is used to investigate the guiding properties. The designed novel dispersion compensating fiber shows that it is possible to obtain a larger negative dispersion coefficient of about −130 to −360 ps/(nm km), better dispersion slope compensation, better compensation ratio, and lower confinement losses less than 10⁻² dB/km in the entire telecommunication (1400–1600 nm) band by using a modest number of design parameters and very simple cladding design.     

系统中基于快速扫描光学延迟线的色散补偿

分析了光学相干层析成像(Optical Coherence Temography,OCT)系统中色散失配对系统纵向分辨率的影响,详细阐述了快速扫描光学延迟线(Rapid Scanning Optical Delay Line,RSOD)的色散性质,提出并采用基于RSOD的色散补偿方法,实验验证了这种色散补偿方法能够实现OCT系统的纵向分辨率接近于理论值,并因此得到了高质量的OCT图像.     

Femto-Second Transform Limited Pulse Generation with Higher Order Dispersion Effects for Dispersion-Shifted Optical Communication System

The paper deals with the influence of higher-order effects of dispersion on the femto-second transform limited pulse generation by compensating for linear chirp of self-phase modulation spectra in the dispersion-shifted fibers. It has been shown that the minimum propagation length with first-order dispersion term is 23 m, as reported earlier. If the higher-order dispersion effects are taken into consideration, this length is reduced to 11.5 m. With compensation of the first-order dispersion term, this length can be enhanced to 6.8161 × 10³ km. This length can further be improved to 6.0343 × 10⁹ km by compensation of first- and second-order dispersion terms together. The minimum pulse width and linewidth product without dispersion, with dispersion including higher-order dispersion effects, and with dispersion compensation, is found to be 0.44, 0.4418, and 0.4411, respectively.     

Femto-Second Transform Limited Pulse Generation with Higher Order Dispersion Effects for Dispersion-Shifted Optical Communication System

The paper deals with the influence of higher-order effects of dispersion on the femto-second transform limited pulse generation by compensating for linear chirp of self-phase modulation spectra in the dispersion-shifted fibers. It has been shown that the minimum propagation length with first-order dispersion term is 23 m, as reported earlier. If the higher-order dispersion effects are taken into consideration, this length is reduced to 11.5 m. With compensation of the first-order dispersion term, this length can be enhanced to 6.8161 × 10³ km. This length can further be improved to 6.0343 × 10⁹ km by compensation of first- and second-order dispersion terms together. The minimum pulse width and linewidth product without dispersion, with dispersion including higher-order dispersion effects, and with dispersion compensation, is found to be 0.44, 0.4418, and 0.4411, respectively.     

Maintaining single polarization and dispersion compensation with modified rectangular microstructure optical fiber

In this paper, we propose and numerically demonstrate a highly birefringent microstructure optical fiber which shows negative dispersion coefficient of about −288 to −550 ps/(nm km) covering S to L wavelength bands and −425 ps/(nm km) at the excitation wavelength 1550 nm. This proposed design successfully compensate the dispersion covering S to L communication bands ranging from 1460 to 1625 nm along with relative dispersion slope (RDS) perfectly matched to that of single mode fiber of about 0.0036 nm⁻¹. Apart from dispersion compensation, the designed MOF offers high birefringence of 2.94 × 10⁻² at 1550 nm and better compensation ratio with design simplicity due to circular air-holes in the fiber cladding.     

色散补偿光纤通信系统中孤子之间的相互作用

采用变分原理与位力定理研究了非线性光通信系统色散补偿方案中,相邻孤子之间的相互作用对孤子传输特性的影响。结果表明:在相位匹配与等幅孤子注入时,在普通单模光纤中这两个孤子先相互吸引,而后又相互排斥,显现周期性碰撞的变化规律,形成束缚孤子态,而在色散补偿光纤中传输的孤子之间不发生碰撞;对相位不匹配与等幅孤子注入,孤子之间发生分离;对相位匹配和不等幅孤子注入,在色散补偿光纤中传输的孤子,如果初始间隔φ0越小,应注入较大的初始幅值差η0,以利于孤子的传输。     

用于频域光学相干层析成像的深度分辨色散补偿方法

提出一种深度分辨的色散补偿方法,用于增强频域光学相干层析成像的纵向分辨率。将频域光学相干层析成像采集的干涉谱信号傅里叶变换到空域,获取对应不同深度的干涉谱条纹相位,通过对其进行调整实现对被测样品不同深度处的色散的精确补偿。避免传统方法中采用统一色散系数进行色散补偿所带来的过补偿与欠补偿误差,可以有效消除色散引起的频域光学相干层析成像系统点扩展函数的展宽和扭曲。模拟和实验结果表明,基于深度分辨的色散补偿方法在样品的全深度探测范围内可以达到较佳的补偿效果,可有效提高光学相干层析成像系统的纵向分辨率。     

能够补偿二阶偏振模色散的三阶段偏振模色散补偿器

简要分析了偏振相关色散对光通信系统性能的影响,提出了一种三阶段高阶偏振模色散补偿方案,从理论上分析了它同时补偿偏振相关色散和偏振主态旋转的可能性,并提出了其可能存在的两种工作方式.通过数值模拟与两阶段补偿方案进行了性能比较,其偏振模色散容限比两阶段补偿提高约17%个比特周期 关键词： 光通信 光偏振 光纤色散