共查询到20条相似文献,搜索用时 31 毫秒
1.
K. C. Reichmann 《Fiber and Integrated Optics》1993,12(2):209-213
We demonstrate 1.7 Gbit/s transmission through 257 km of conventional fiber using directly modulated distributed-Bragg reflector (DBR) lasers and fiber amplifiers. This experiment resulted in a record bit rate distance product of 437 km Gb/s for direct modulation at rates between 1 and 3 Gbit/s. This paper has been accepted for presentation at OFC '92. 相似文献
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10Gbit/s time-spread/wavelength-hop optical code generation and decoding are performed by dispersion-compensating fiber Bragg grating (FBG) en/decoder pair. Error-free 10km single mode fiber (SMF) transmission of 10Gbit/s optical code division multiplexing (OCDM) has been experimentally demonstrated. 相似文献
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ABSTRACTBy incorporating double-ring cavities and a piece of un-pumped Er3+-doped fiber (EDF) as a saturable absorber, we report a single-longitude-mode EDF fiber laser at C-band. The single-longitude-mode is obtained, the first time, by inserting only two subring cavities in either serial connection or parallel connection. The fiber laser has an optical signal-to-noise-ratio of 34.5 dB and a maximum power fluctuation of less than 1.3% for 1-hr operation. It was then modulated up to 10 Gbit/s by using an electro-optic modulator for eye diagrams, compared to back-to-back transmission. Such a compact and low-cost fiber laser is potential for high-speed optical communication. 相似文献
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Hiroyuki Toda Maoki Suzuki Ryo Takami Tetsuya Miyazaki Takeshi Makino Fumito Kubota 《光学学报》2003,23(Z1)
We demonstrate 740 Gbit/s (37 × 20 Gbit/s) DWDM recirculating transmission experiment with 59 nm continuous bandwidth over 300 km by employing Er3+-doped tellurite fiber amplifiers. The use of Raman amplification is effective to increase the transmission bandwidth. 相似文献
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Fan Li Zizheng Cao Guangqian Wen Jiangnan Xiao Jianjun Yu Lin Chen 《Optics Communications》2012,285(13-14):3075-3081
The direct-detected optical OFDM (DDO-OFDM) system in frequency-selective fading fiber channel with three different types of pilot interval design has been experimentally investigated. In these schemes, the 2.28 Gbit/s QPSK-OFDM signal is transmitted over 100 km fiber in the system. The experiment results show the scheme with sparse pilot as frequency increasing shows the best performance for DDO-OFDM system. 相似文献
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用光反馈半导体激光器产生混沌超宽带(UWB)信号, 搭建了混沌UWB光载无线通信链路, 实现了360, 720 Mbit/s和1.44 Gbit/s三种不同传输速率下混沌UWB脉冲信号的生成和传输. 在未经任何色散补偿处理的情况下, 1.44 Gbit/s的混沌UWB信号在经过10 km单模光纤和0.6 m无线链路传输后, 在天线接收端被成功解调. 由于混沌UWB信号输出的随机性, 对应的UWB信号频谱中未出现任何离散的谱线. 这意味着利用混沌UWB信号实现的光载无线通信链路, 可以完全避免离散谱线对系统传输性能的劣化. 相似文献
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1IntroductionUsingdispersioncompensatingtechniquestoupgradetheexistingnondispersionshiftedfiber(NDSF)telecommunicationsystemi... 相似文献
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Jansen SL Khoe GD de Waardt H Spälter S Weiske CJ Schöpflin A Field SJ Escobar HE Sher MH 《Optics letters》2004,29(20):2348-2350
A polarization-diverse subsystem based on periodically poled lithium niobate waveguides is used as an optical phase conjugator for compensation for linear and nonlinear distortion. We show successful transmission formats of 13 x 40 Gbit/s non-return-to-zero mixed with 6 x 10 Gbit/s non-return-to-zero and 40-Gbit/s duobinary over 8 x 100 km of standard single-mode fiber. A single phase conjugator is used to conjugate all data formats, including the alternative duobinary format, simultaneously. 相似文献
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Amin Malekmohammadi Ahmad Fauzi Abas Ghafour Amouzad Mahdiraji Mohd Fadlee A. Rasid 《Optics Communications》2009,282(21):4233-4241
The performance of absolute polar duty cycle division multiplexing (AP-DCDM) over wavelength division multiplexing (WDM) system is presented based on the simulation results. The AP-DCDM signal has narrower bandwidth than conventional time division multiplexing (TDM) signal, which makes its implementation in WDM system advantageous. In this paper, characteristics of AP-DCDM and TDM signals in WDM system are compared at the speed of 40 Gbit/s per channel, for the minimum allowed channel spacing and the chromatic dispersion tolerance. The results clearly show that AP-DCDM performs significantly better than TDM. By using AP-DCDM, 1.28 Tbit/s (32 × 40 Gbit/s) was successfully transmitted over 320 km standard single mode fiber. Spectral efficiency of 0.64 b/s/Hz was achieved by using 10 Gbit/s transmitters and receivers without polarization multiplexing. 相似文献
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We demonstrated 2.16-Tbit/s (43 Gbit/s x 54 ch) WDM transmission over 600 km of standard single-mode fiber with high spectral efficiency 0.53 bit/s/Hz using optimized optical mux/demux filters for 75-GHz channel spacing in a simple NRZ modulation scheme. 相似文献
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One meter-long spool of bismuth oxide-based fiber, with nonlinear coefficient of 1250 W−1 km−1, is used to realize an optical 160-to-10 Gbit/s demultiplexer based on four wave mixing. Bit-Error-Rate measurements demonstrate a demultiplexing penalty lower than 2 dB confirming the suitability of bismuth oxide-based fiber for 160 Gbit/s all-optical processing. 相似文献
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In this work, WDM transmission with 40-Gbit/s per channel bit rate has been experimentally demonstrated over a 500-km link. Different chromatic dispersion conditions have been managed and in-line all-optical wavelength conversion has been carried out with a periodical poled lithium niobate (PPLN) device in a polarization-independent scheme. The link was obtained by connecting the fibers contained in an installed cable between Roma and Pomezia (25 km), encompassing single-mode (G.652) and high-end (G.655, non-zero dispersion with a particular value and flat curve for chromatic dispersion) fibers. Some 40 Gb/s channels were propagated in the link 500 km long and one channel was dropped from the link after 300-km propagation, wavelength converted, and added to the other channels for the next 200 km. The electrical data interfaces exploited a 4 × 10 Gbit/s to 1 × 40 Gbit/s MUX at the transmitter, along with a 1 × 40 Gbit/s to 4 × 10 Gbit/s DMUX at the receiver. Successful transmission of 4 channels, 200-GHz spaced, has been achieved over 500 km along both G.652 and G.655 links. No evidence of penalty comparing converted and unconverted channels has been reported. Transmission experiments of 8 × 40 Gbit/s, with 100 GHz frequency spacing, are also reported. No significant degradation has been observed in the case of the G.652 link. 相似文献
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A. Schiffini A. Paoletti D. Caccioli P. Minzioni H. Suche Y. L. Lee A. Galtarossa P. Griggio G. Lorenzetto F. Matera G. M. Tosi-Beleffi F. Curti M. Guglielmucci S. Cascelli L. Lattanzi Matjaz Vidmar P. P. Monteiro 《Fiber and Integrated Optics》2005,24(5):471-489
In this work, WDM transmission with 40-Gbit/s per channel bit rate has been experimentally demonstrated over a 500-km link. Different chromatic dispersion conditions have been managed and in-line all-optical wavelength conversion has been carried out with a periodical poled lithium niobate (PPLN) device in a polarization-independent scheme. The link was obtained by connecting the fibers contained in an installed cable between Roma and Pomezia (25 km), encompassing single-mode (G.652) and high-end (G.655, non-zero dispersion with a particular value and flat curve for chromatic dispersion) fibers. Some 40 Gb/s channels were propagated in the link 500 km long and one channel was dropped from the link after 300-km propagation, wavelength converted, and added to the other channels for the next 200 km. The electrical data interfaces exploited a 4 × 10 Gbit/s to 1 × 40 Gbit/s MUX at the transmitter, along with a 1 × 40 Gbit/s to 4 × 10 Gbit/s DMUX at the receiver. Successful transmission of 4 channels, 200-GHz spaced, has been achieved over 500 km along both G.652 and G.655 links. No evidence of penalty comparing converted and unconverted channels has been reported. Transmission experiments of 8 × 40 Gbit/s, with 100 GHz frequency spacing, are also reported. No significant degradation has been observed in the case of the G.652 link. 相似文献
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A single chip optical receiver with an integrated large-diameter photodiode, transimpedance amplifier, two stages active equalizer, post amplifier and 50 Ω driver is used for gigabit transmission over PMMA step plastic optical fiber (SI-POF). The large-diameter photodiode with an antireflection coating optimized for red light. The integrated equalizer enables the presented optical receiver to reach 1 Gbit/s over 50 m SI-POF at bit error ratio of 10− 6. An error free (< 10− 9) 1 Gbit/s data rate over 40 m standard PMMA step-index plastic optical fiber is also achieved. 相似文献
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A multichannel fiber-grating-based optical limiting amplifier module is proposed. Dual-wavelength, hybrid data rate transmission is demonstrated with 30 dB input dynamic range. For 5.0 and 2.5 Gbit s dual-channel transmission in a 200 km single-mode fiber, power penalty due to gain competition between channels and backreflection noise is less than 0.6 dB compared to the receiver sensitivity of 0 km, 5.0 Gbit per second single-channel operation. 相似文献
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Recent progress on time-division multiplexed (TDM) and wavelength-division multiplexed (WDM) soliton transmission is described, in which dispersion management plays an important role in increasing the power margin and the dispersion tolerance. The characteristics of the dispersion-managed soliton are compared with those of return to zero and nonreturn to zero pulses. With a small dispersion swing, the system can still be described as an average soliton using the nonlinear Schrodinger equation, while with a large dispersion swing, the solitonlike steady-state pulse becomes a chirped Gaussian pulse, in which the governing equation is closer to a linear Schrodinger equation with a parabolic potential well. We describe an in-line modulation scheme for up to 80 Gbit/s per channel and its two channel WDM transmission over 10 000 km. Finally, we describe 640 Gbit/s (40 Gbit/sx16 channels) WDM soliton transmission over 1000 km with a dispersion-managed single-mode fiber. (c) 2000 American Institute of Physics. 相似文献
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An electrical nonlinearity pre-compensation (ENPC) combined nonlinearity with chromatic dispersion method is introduced for coherent optical orthogonal frequency-division multiplexing (CO-OFDM) system. Comparing with existed only nonlinearity pre-compensation (NL Pre-comp) method, ENPC method is not only suitable for low-dispersion fiber system, but also effective for high dispersion fiber transmission system without optical dispersion compensation. For 40 Gbit/s 20 × 80 km standard single mode fiber (SSMF) system, ENPC method can improve the nonlinear threshold (NLT) (for Q > 10 dB) about 2.7, 1.2, and 1.0 dB, and the maximum Q factor about 1.2, 0.4, and 0.3 dB for 2, 8, and 16 ps/nm/km fiber systems, respectively. The method allow the CO-OFDM system can avoid using optical dispersion compensation even for high dispersion fiber system with higher input power, and the 2-step ENPC solution does not increase more computation complexity compared with NL pre-comp method. 相似文献
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Numerical analysis and system optimization for 100 Gbit/s carrier Ethernet serial modulation formats
H. Chaouch C. Gonschior K.-F. Klein M. Schneiders F. Küppers 《Optics Communications》2010,283(11):2333-2338
The performance of various modulation schemes for 100 Gbit/s single-channel serial transmission is investigated by means of numerical simulations. Different ASK and PSK modulation formats are compared in terms of total system reach for a 10−9 BER requirement. RZ-DQPSK format with a 1920 km reach, without FEC and without the support of additional Raman amplification, outperforms all the other schemes including 10 × 10 Gbit/s NRZ DWDM inverse multiplexing. 相似文献