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1.
Nowadays in optical networks there is a trend line to extend the maximum transmission distance. Several techniques are known; however, the simplest one is to increase the signal power in the optical fiber. The task of minimizing the number of inline amplifiers in order to increase the deployed system’s cost effectiveness leads to increasing the signal power. The only problem is the nonlinear behavior of the optical fiber which limits the signal power to be inserted into the optical fibers. In this paper, we present a model to calculate analytically the signal quality deterioration due to nonlinear effects at the receiver point. As a result, we give the exact value of the optimal signal power at the transmitter point or at the output of the inline amplifiers for 10 Gbit/s wavelength division multiplexed (WDM) systems.
Tibor CinklerEmail:
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2.
3.
High-performance lnGaAlAs/InP vertical-cavity surface-emitting lasers (VCSELs) at 1.55 μm, are demonstrated with superior output characteristics and modulation bandwidths up to 10 Gbit/s  相似文献   

4.
采用半导体的增益开关法成功地产生了2.5Gbit/s的孤子光脉冲并对其进行了外调制。对经过调制的孤子光脉冲进行了检测,分析了实验原理及结果。  相似文献   

5.
A fully monolithic separate absorption and modulation region wavelength converter requiring no bias tees has been fabricated. The device consists of a transmitter comprising a sampled-grating DBR laser and series-push-pull Mach-Zehnder modulator, and a receiver composed of a linear semiconductor optical amplifier and a quantum well pin photodetector. The wavelength converter has a 13 GHz bandwidth and demonstrates error-free operation at 10 Gbit/s with unity gain  相似文献   

6.
A novel packet bit error rate (BER) and loss measurement method and system is proposed. A proposed 40 Gbit/s packet BER and loss measurement system is expressed in detail. A 40 Gbit/s BER and loss measurement with various conditions is demonstrated experimentally. In real time, only the payload part of a packet and burst stream with fluctuated guard time is evaluated. The BER and packet loss of a randomly received packet sequence due to routing and buffering can be also evaluated by the measurement system. A 10 Gbit/s packet BER and loss measurement with optical label switching, buffering, and preamble-free optical packet 3R are demonstrated experimentally.  相似文献   

7.
A signal remodulation scheme of 10-Gb/s differential phase-shift keying(DPSK) downstream and 10-Gb/s on-off keying(OOK) upstream using a semiconductor optical amplifier(SOA) and a Mach-Zehnder intensity modulator(MZ-IM) at the optical networking unit(ONU) side for wavelength division multiplexed passive optical network(WDM PON) is proposed.Simulation results indicate that error-free operation can be achieved in a 20-km transmission,and the receiver sensitivity of return-to-zero differential phase-shift keying(RZ-DPSK) is higher than nonreturn-to-zero differential phase-shift keying(NRZ-DPSK) in the proposed scheme.  相似文献   

8.
9.
《Optical Fiber Technology》2014,20(3):261-267
A novel full-duplex fiber-wireless link with 40 Gbit/s 16-ary quadrature amplitude modulation (QAM) signals is proposed to provide alternative wired and wireless accesses for the user terminals. In the central station (CS), the downstream signal for wired and wireless accesses is beared onto the CW laser source via an optical I/Q modulator to realize the QAM modulation. At the hybrid optical network unit (HONU), a tunable laser is used to provide coherent optical local oscillator for homo-/heterodyne beating to coherently down-convert the baseband optical signal to the baseband electrical one for wired access or to the mm-wave one for wireless access according to the requirement of the user terminals. Simultaneously, the lightwave from the tunable laser is also used as the uplink optical carrier for either wired or wireless access, and is modulated colorlessly by the baseband or mm-wave signal of the uplink alternatively. After filtering, only one tone carrying the uplink signal is transmitted back to the CS even for the wireless access. The theoretical analysis and simulation results show that our proposed full-duplex link for the alternative wired and wireless accesses maintains good performance even when the transmission link with standard single mode fiber (SSMF) is extended to 30 km.  相似文献   

10.
北电网络的新型10Gbit/s S/DMS传输节点系统面向宽带传输的需求,可支持10Gbit/s群路速率接口和低速155M、62M和2.5Gbit/s等支路端口卡。其多波长光中继器系统(MOR/MOR+)采用双向多波长放大器,在单根光纤上支持16或32波DWDM传输。二者的结合可使运营商利用现有的光纤,在满足高性能传输及高效率管理的同时,实现最低的每比特每公里传输成本。  相似文献   

11.
Soliton transmission is achieved in a recirculating loop at 10 Gbit/s up to 27 Mm using the “signal frequency sliding” method. Phase margin measurements are presented at different distances  相似文献   

12.
A 10‐Gbit/s wireless communication system operating at a carrier frequency of 300 GHz is presented. The modulation scheme is amplitude shift keying in incoherent mode with a high intermediate frequency (IF) of 30 GHz and a bandwidth of 20 GHz for transmitting a 10‐Gbit/s baseband (BB) data signal. A single sideband transmission is implemented using a waveguide‐tapered 270‐GHz highpass filter with a lower sideband rejection of around 60 dB. This paper presents an all‐electronic design of a terahertz communication system, including the major modules of the BB and IF band as well as the RF modules. The wireless link shows that, aided by a clock and data recovery circuit, it can receive 27?1 pseudorandom binary sequence data without error at up to 10 Gbit/s for over 1.2 m using collimating lenses, where the transmitted power is 10 μW.  相似文献   

13.
The sensitivity of optical orthogonal-frequency division multiplexing (OFDM) transmission to the finite resolutions of the digital-to-analog (DAC) and analog-to-digital converters (ADC) has been analyzed using numerical simulations. We show that for back-to-back configuration the requirements regarding the number of quantization bits for the DACs are similar to the ones of the ADCs. After transmission over metro and long-haul distances a higher resolution of the DAC/ADC is required compared to back-to-back configuration. We show that after transmission it is sufficient to enhance either the ADC resolution or the DAC resolution by 1 bit.  相似文献   

14.
The authors report an electrically pumped MOVPE-grown VCSEL on GaAs substrate with a GaInNAs active region emitting single mode at 1293 nm with record characteristics. Continuous wave output power at room temperature with 1.4 mW, a threshold current of 1.25 mA and a data transmission rate of 10 Gbit/s has been realised  相似文献   

15.
An unrepeatered 89 km 1310 mn 10 Gbit/s transmission experiment has been carried out for the first time employing an SL-MQW DFB laser diode and a high sensitivity optical front end with 1310 nm strained layer MQW optical amplifiers, enabling a total power budget of 35.8 dB. A record receiver sensitivity of -30.3 dBm at 10 Gbit/s @1310 nm has been demonstrated  相似文献   

16.
The authors demonstrate a novel InP-based optical multiplexer integrated with MQW electroabsorption modulators for 100 Gbit/s transmission. A 100 GHz optical pulse train is generated and coded with a pseudorandom NRZ pattern  相似文献   

17.
A system experiment is reported in which polarisation mode dispersion (PMD) and chromatic dispersion (CD) compensation was achieved using an SiGe IC linear equaliser, with a transmission rate of 100 bit/s over 95 km of standard single-mode fibre (DL=1600 ps/nm). Full equalisation was obtained, with a differential group delay (DGD) of <65 ps and a penalty reduction to 3.4 dB for DGD=100 ps  相似文献   

18.
Fischer  U. 《Electronics letters》1992,28(14):1305-1306
With low chirp direct modulation of a commercially available lambda =1.55 mu m BH DFB laser module at 10 Gbit/s, a transmission experiment over 69 km of non-dispersion-shifted singlemode fibre was successfully performed. The scheme is based on optical FM by modulation of the injection current with subsequent conversion into intensity modulation by means of a fibre Mach-Zehnder interferometer.<>  相似文献   

19.
An interface for converting non-return to zero (NRZ) and RZ input signals to RZ output signals at 10 Gbit/s based on two all-optical wavelength converters is demonstrated. The interface performs bit-synchronisation and format and wavelength conversion combined with 3R regenerative capabilities, including jitter-to-amplitude modulation transfer suppression  相似文献   

20.
54/spl times/42.7 Gbit/s L and U-band WDM signal transmission has been experimentally demonstrated. In-line hybrid optical amplifiers consisting of L-band EDFAs and U-band distributed Raman amplifiers enable 2.2 Tbit/s WDM signals to be transmitted over three spans of 75 km DSF.  相似文献   

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