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In this research, authors propose approach to assess lifetime of fiber optic infrastructure (buried cable) based on measurements of chromatic dispersion (CD) and polarization mode dispersion (PMD). The initial dispersion measurements were made right after cable installation then approximately three months (4440 hours) later before start of service, and then repeated measurements in two and a half...
In this paper authors propose methodology to assess lifetime of fiber optic infrastructure (buried cable) based on attenuation measurements. The attenuation measurements were provided as a part of transmission line acceptance tests and then during operation and maintenance routine one year after start of service. Measurements were made on 1310nm and 1550nm wavelengths. Proposed methodology calculates...
Optical Fiber Communication widely implements Dense Wave Division Multiplexing (DWDM) technique in order to accommodate large number of channels within a limited bandwidth. But, this technology suffers a serious degradation in signal quality due to inter-channel interference. Optical Kerr Effect, in addition to this, worsens the situation. This paper deals with minimization of Four Wave Mixing (FWM)...
In present research, Aeff parameter measurements for ytterbium (Yb3+) and erbium (Er3+) doped optical fibers were performed experimentally by the usage of transverse shift measurement method. All the measurements were done at two different wavelengths (1310nm and 1550nm accordingly) at various power levels with an aim to evaluate how effective area depends on those parameters. With the increase of...
WDM transmission system capacity growth creates a need to increase EDFA output power. One of the most attractive solutions in this area is the usage of ytterbium doped fiber (EYDF), which ensures low non-linearity, without affecting the amplification efficiency. In this research master-oscillator power amplifier (MOPA) was modelled using different ytterbium co-doped fiber lengths: 10, 15, 20 and 25m...
In this research we investigated the performance of in-line Erbium Doped Fiber Amplifier (EDFA) in 40 Gbit/s 8 channels wavelength division multiplexing (WDM) transmission system with NRZ-OOK modulation format and 100 GHz channel spacing. Different EDFA configurations: co-propagation (980nm) and counter propagation (1480nm) were used in order to find an optimal settings with minimal noise factor indicators...
The main goal of this paper is to investigate the ability of a single-pump fiber optical parametric amplifier with linearly polarized pumping radiation to provide binary polarization shift keying to intensity on-off keying modulation format conversion in a single channel optical transmission system. The amplifier produced up to 14.8 dB of on-off gain, and it was demonstrated that such level of amplification...
In this paper authors provide the results from the research about all-dielectric self-supporting optical cables reliability when these cables are mounted on the rests of high voltage electrical power lines. Comparison of reliability parameters is given between optical cable lines mounted on the power lines up to 110kV and 330kV. Additionally measurement results of fiber polarization mode dispersion...
The authors have investigated the impact of self-phase modulation (SPM) induced distortions to optical signal transmission over proposed configuration of spectrally efficient wavelength division multiplexed (WDM) fiber-optic transmission system (FOTS). In chosen model of ultra-dense mixed-WDM system optical signals are transmitted with two different per channel bitrates (i.e., 10 and 40 Gbit/s) and...
Increasing data rates in the fiber optics transmission systems leads to more new limiting factors which complicates the signal transmission. One of such factors is the optical fiber birefringence induced polarization mode dispersion (PMD). Although PMD value in typical standard single mode fiber is quite low (less than 0.2 ps/âkm for ITU-T G.652D standard fiber) higher data rates sets higher...
Optical amplifier usage in the fiber optics transamission systems significantly improves the transmission distance. But it also influence the signal quality. This article describes a study on optical intensity characteristics and its impact to optical signal propagation in the erbium doped fiber (EDF) used in the doped fiber amplifiers. First of all the far field optical power distribution measurements...
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