Distortion spectrum of laser intensity modulation

Rainal, A. J.

doi:10.1109/26.380213

Cited by 10 publications

(2 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A lot of work has been done concerning the calculation of the power spectral density of clipping noise [1,2]. But due to the non-Gaussian distribution of clipping noise, error probabilities cannot be calculated only with the knowledge of the average power within a given bandwidth.…”

Section: Introductionmentioning

confidence: 99%

Error Probability due to Clipping in Subcarrier Multiplexed Fiber-Optic Transmission Systems

Czylwik¹

2000

Frequenz

View full text Add to dashboard Cite

Intensity-modulated fiberoptic subcarrier multiplexed (SCM) transmission systems are distorted by impulsive noise from the clipping effect in optical transmitters due to the fact that the emitted optical power has to be positive and cannot become negative. The properties of the impulsive noise, such as the slowly decreasing probability density function are pointed out. For the transmission of digital QAM signals in SCM systems, the symbol error probability due to the impulsive noise is calculated analytically. The results from the analytical calculations are compared with numerical simulations. Furthermore, different methods for reduction of the error probability are discussed. ÜbersichtIntensitätsmodulierte optische Übertragungssysteme mit Unterträgertechnik (subcarrier multiplexing -SCM) werden durch impulsförmiges Rauschen aufgrund des Begrenzungseffekts im optischen Sender gestört, da die abgestrahlte optische Leistung positiv ist und nicht negativ werden kann. Es werden die Eigenschaften des impulsförmigen Rauschens, wie die langsam abnehmende Wahrscheinlichkeitsdichtefunktion, herausgestellt. Für die Übertragung digitaler QAM-Signale in SCM-Systemen wird die Symbolfehlerwahrscheinlichkeit aufgrund des impulsförmigen Rauschens analytisch berechnet. Die Ergebnisse der analytischen Berechnungen werden mit numerischen Simulationen verglichen. Außerdem werden verschiedene Methoden zur Reduktion der Fehlerwahrscheinlichkeit diskutiert.Für die Dokumentation Optische Kommunikation / Begrenzung / Unterträgertechnik

show abstract

Section: Introductionmentioning

confidence: 99%

Error Probability due to Clipping in Subcarrier Multiplexed Fiber-Optic Transmission Systems

Czylwik¹

2000

Frequenz

View full text Add to dashboard Cite

show abstract

“…[1][2][3][4][5] Therefore, the transmission quality of such a system has been defined and regulated, which basically determines the signal-receiving quality of the system based on the following three parameters: carrier-to-noise ratio (CNR), composite second order (CSO), and composite triple beat (CTB). 6 Both noise and nonlinear effects in the fiber-optic CATV transmission system are mostly caused by active components but rarely by passive components. Such noise severely affects both system performance and transmission distance; thus, CNR is usually adopted in the parameter measurement of CATV systems to analyze the characteristics of the transmission signal quality of the system.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear distortion evaluation in a directly modulated distributed feedback laser diode-based fiber-optic cable television transport system

Ying

Lin

et al. 2015

Opt. Eng

View full text Add to dashboard Cite

Abstract. This study evaluated a directly modulated distributed feedback (DFB) laser diode (LD) for cable TV systems with respect to carrier-to-nonlinear distortion of LDs. The second-order distortion-to-carrier ratio is found to be proportional to that of the second-order coefficient-to-first-order coefficient of the DFB laser diode driving current and to the optical modulation index (OMI). Furthermore, the third-order distortion-to-carrier ratio is proportional to that of the third-order coefficient-to-first-order coefficient of the DFB laser diode driving current, and to the OMI IntroductionWith the popularity of optical fiber networks and the demand for high-quality videos, the development of changing TV signals from traditional cables to optic fibers has been promoted globally; thus, fiber-optic cable television (CATV) has been widely discussed. 1-5 Therefore, the transmission quality of such a system has been defined and regulated, which basically determines the signal-receiving quality of the system based on the following three parameters: carrier-to-noise ratio (CNR), composite second order (CSO), and composite triple beat (CTB).6 Both noise and nonlinear effects in the fiber-optic CATV transmission system are mostly caused by active components but rarely by passive components. Such noise severely affects both system performance and transmission distance; thus, CNR is usually adopted in the parameter measurement of CATV systems to analyze the characteristics of the transmission signal quality of the system. Given that CNR is proportional to the optical modulation index (OMI), a higher CNR could be obtained by increasing the OMI. However, an extremely high OMI could worsen the nonlinear distortion of the system, causing the system to generate second and third harmonic distortions, as well as second and third intermodulation distortions. These nonlinear distortions result from the accumulation of signals that fall on other channels, which decreases both CSO and CTB of the system. Under ordinary conditions, designing a CATV system to obtain high CNR, CSO, and CTB values altogether is impossible, but an optimum balance range between noise and the systematic nonlinear effect could be determined. Such a nonlinear effect has become an important research topic to directly modulate distributed feedback (DFB) laser diode (LD) in fiber-optic CATV systems.7-10 The present study theoretically deduces the relationship among the direct modulation, driving current,

show abstract

Modeling and simulation of dynamics and noise of semiconductor lasers under NTSC modulation for use in the CATV technology

Mahmoud

Abdel-Hady

2015

Beni-Suef University Journal of Basic and Applied Sciences

View full text Add to dashboard Cite

Distortion spectrum of laser intensity modulation

Cited by 10 publications

References 22 publications

Error Probability due to Clipping in Subcarrier Multiplexed Fiber-Optic Transmission Systems

Error Probability due to Clipping in Subcarrier Multiplexed Fiber-Optic Transmission Systems

Nonlinear distortion evaluation in a directly modulated distributed feedback laser diode-based fiber-optic cable television transport system

Modeling and simulation of dynamics and noise of semiconductor lasers under NTSC modulation for use in the CATV technology

Contact Info

Product

Resources

About