搜索结果: 1-15 共查到“工学 DPSK”相关记录72条 . 查询时间(0.046 秒)
视频：南京师范大学物理科学与技术学院通信原理 DPSK调制教学录像。
大气湍流是自由空间光通信链路系统的主要限制因素。大气湍流造成光束的强度闪烁和相位起伏。因此,基于MZI-DPSK调制,考虑大、小湍流尺度引起的强度闪烁和相位噪声对误码率的影响且强度闪烁满足逆高斯分布和相位波动满足高斯分布。利用分布式天线阵接收技术,研究了大气湍流下自由空间光通信链路的误码率性能,推导了在内外尺度下,分布式天线阵接收的误码率关于相位误差的函数表达式。为了提高误码率的性能,天线阵接收采...
QD-SOA的四波混频及DPSK信号的异或逻辑研究
量子点半导体光放大器 四波混频 异或逻辑 DPSK
2016/8/29
采用有限差分方法对量子点半导体光放大器(QD-SOA)中的四波混频(FWM)现象进行了研究。通过仿真计算,分析了多个参数对四波混频效率的影响。增强泵浦光功率、增大QD-SOA 的长度以及注入电流,四波混频效率明显增大。增大探测光功率以及泵浦光和探测光的波长间隔,四波混频效率均降低。基于四波混频效应实现了差分相移键控信号的异或逻辑操作,模拟得到了异或逻辑的时域和频域输出结果。在多个波长位置同时实现了...
This theoretical study presents a novel modulation scheme which simultaneously encodes the amplitude shift keying label on the carrier-suppressed return-to-zero differential phase shift keying payload...
A Consolidated Multi-rate Burst-Mode DPSK Transmitter Using a Single Mach-Zehnder Modulator
Phase modulation Free-space optical comm Optical communications
2015/5/26
We demonstrate phase modulation, pulse carving, and burst-mode windowing in a single Mach-Zehnder modulator, significantly reducing size, weight, power, and complexity of prior three-modulator designs...
A Novel 1×N Demodulator for Both DPSK and DQPSK Formats
Fiber optics and optical communications Fiber optics communications
2015/5/26
A 1×N demodulator for both DPSK and DQPSK formats is proposed in this paper.The PDFS of such demodulator is less than 300MHz, through introducing LC phase retarder,fast tuning time of 50ms is realized...
320 Gbps DPSK transmitter and self-tracked receiver based on four-wave mixing
Fiber devices and optical amplifiers Nonlinear optics four-wave mixing Fiber optics communications
2015/5/26
A novel RZ differential phase-shift keyed transmitter and self-tracked receiver based on cavity-less pulse generation and four-wave mixing for data rate of 320 Gb/s. The performance was quantified wit...
SOA-based OTDM-DPSK Demultiplexing Assisted by Offset-Filtering
Nonlinear optical signal processing Semiconductor optical amplifiers
2015/5/25
We demonstrated for the first time 80 to 40 Gb/s OTDM-DPSK demultiplexing using a single SOA assisted by offset-filtering. Error free performance is achieved with an average power penalty of 5.5 dB.
Demonstration of Cascadability and Phase Regeneration of SOA-Based All-Optical DPSK Wavelength Converters
Wavelength conversion devices Semiconductor optical amplifiers
2015/5/22
We experimentally demonstrate cascadable regeneration of 10Gb/s DPSK signals by using a two-fold cascade of SOA-based wavelength converters. No additional power penalty and 3dB OSNR improvement are ob...
320 Gb/s RZ-DPSK Data Multicasting in Self Seeded Parametric Mixer
RZ-DPSK Data Multicasting Self Seeded Parametric Mixer
2015/5/21
We report first experimental demonstration of 320Gb/s RZ-DPSK wavelength multicasting in self-seeded parametric mixer free of Brillouin backscatter. High efficienty multicaster operated without pump p...
Optical ASK-DPSK and QAM Signal Generation Using FWM in High Nonlinearity Fiber (HNLF)
Optical ASK-DPSK QAM Signal Generation FWM High Nonlinearity Fiber (HNLF)
2015/5/20
As a modulation-format transparent nonlinear process, FWM is capable of generating complex optical signal constellations. In experiments and simulations, optical ASK-DPSK and 8-QAM signals are generat...
Assessment of Capacity Upgrade Using 40Gbps DPSK Transmission in 10Gbps DWDM ROADM Networks
Assessment of Capacity Upgrade Using 40Gbps DPSK Transmission in 10Gbps DWDM ROADM Networks
2015/5/18
We present a detailed study for capacity upgrade using 40Gbps DPSK transmission in 10Gbps optimized 50GHz spaced DWDM ROADM systems. It was found that further optimizing the chromatic dispersion pre-c...
40-Gbit/s RZ-DPSK Wavelength Conversion Using Four-Wave Mixing in a Quantum Dot SOA
RZ-DPSK Wavelength Conversion Dot SOA
2015/5/15
We demonstrate, for the first time, all-optical wavelength conversion of 40-Gbit/s RZ-DPSK signal using four-wave mixing in a quantum dot semiconductor optical amplifier. We achieved error-free operat...
Compact Tunable Delay Interferometer using Movable Prism for DPSK Optical Performance Monitor
Compact Tunable Delay Interferometer Movable Prism PSK Optical Performance Monitor
2015/5/15
A tunable delay interferometer for a multi-bit-rate DPSK optical performance monitor is described. Quality monitoring of various bit rate signals using all-optical sampling is demonstrated and agrees ...
Full C-band 40-Gbit/s DPSK Tunable Transmitter Module Developed by Hybrid Integration of Tunable Laser and InP n-p-i-n Mach-Zehnder Modulator
Modulators Integrated optics devices
2015/6/10
A 40-Gbaud tunable transmitter module was developed for the first time by the hybrid integration of a full C-band tunable laser and an InP Mach-Zehnder modulator. Wavelength-tunable chirpless 40-Gbit/...