排序方式: 共有25条查询结果,搜索用时 0 毫秒
21.
22.
Many lower-speed data streams can be multiplexed into one high-speed stream by means of optical time division multiplexing (OTDM), such that each input channel transmits its data in an assigned time slot. The simulation is performed by a fast multiplexer switch (mux). The routing of different data streams at the end of the TDM link is performed by a demultiplexer switch (demux) and this demultiplexer is employed using MZI switch as it consists a semiconductor optical amplifier (SOA) and an optical coupler. In this paper four channel OTDM is simulated at 40 Gbit/s and further the impact of the signal power, pulse width and control signal power on BER is investigated. 相似文献
23.
In this paper, we investigate the impact of interferometer delay time in a 5 Gb/s optical double sideband-suppressed carrier (ODSB-SC) RoF system transmitting two wavelength interleaved radio frequency (RF) signals at 10 and 15 GHz over an optical fiber. Here, an optical Mach–Zehnder modulator is used for both optical carrier suppression and signal modulation. At the receiver, delay interferometer is used for the separation of RF frequency signals. We analyze the performance of the RoF system by varying the value of delay time of interferometer from 0.02 to 0.14 ns. The result shows that the RoF system performance is optimum for the time delay of 0.1 ns. Further, the optical spectrums, RF spectrums and eye diagrams of two interleaved RF signals have been compared. 相似文献
24.
大功率、高效率、高消光比铒光纤多波长超荧光光源 总被引:1,自引:3,他引:1
采用改进的反射式Mach-Zehnder干涉滤波器,对双程后向结构掺铒光纤超荧光光源(DPB SFS) 分别进行光谱分割和光谱预分割,构建了两种结构的多波长超荧光光纤光源(MW SFS),波长间隔为~0.8 nm时,在1550 nm附近(1542~1559 nm)20个波长的功率波动小于0.5 dB其中前者消光比高达27 dB;后者消光比~18 dB,在泵浦光功率为72.8 mW时,最大输出功率25.3 mW,光光转换效率高达34.8%改变Mach-Zehnder干涉仪的臂长差,采用光谱预分割技术,得到1550 nm附近波长间隔~0.4 nm、消光比~16 dB的50个波长输出 相似文献
25.
A lithium niobate (LiNbO3) broad-band photonic sensor using reflection-type Mach-Zehnder optical waveguide modulator has been designed, fabricated, and experimentally demonstrated. The bare chip size of the sensor is microminiaturized as small as 20×5×0.5 mm3. The sensor has a wide band frequency response from 10 kHz to 20 GHz with variation less than ± 5 dB. The sensor system shows better linear characteristic from 100 mV/m to 700 V/m, and the sensitivity is 33 mV/m. Besides, the nanosecond EMP with intensity of 30 kV/m has been measured in the time domain. 相似文献