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2006•Unpublished venueRequires access

Effect of Laser Bias Current to the Third Order Intermodulation in the Radio over Fibre System

Syamsuri Yaakob, W. R. Wan Abdullah, Mohamed Nasrun Osman, Abdul Kadir Zamzuri, R. Mohamad, Mohamed Razman Yahya, A. F. A. Mat, M.R. Mokhtar, Hairul Azhar Abdul-Rashid

Open publisher page 4 citations

Abstract

Third order intermodulation (IM3) can cause non-linearity effects which result in interference and crosstalk between the subcarriers in radio over fibre (ROF) transmissions. This paper presents the experimental results of the effect of varying the magnitude of the laser bias current on the IM3 in an ROF system with direct modulation. We also investigate the behaviour of the system spurious free dynamic range (SFDR) with the bias current variation. The results show that there will be an optimum bias current range for a given range of the radio frequency (RF) input power in order to minimise the IM3 effect and obtain the best possible SFDR for the system.

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What this paper is about

Third order intermodulation (IM3) can cause non-linearity effects which result in interference and crosstalk between the subcarriers in radio over fibre (ROF) transmissions. This paper presents the experimental results of the effect of varying the magnitude of the laser bias current on the IM3 in an ROF system with direct modulation. We also investigate the behaviour of the system spurious free dynamic range (SFDR) with the bias current variation. The results show that there will be an optimum bias current range for a given range of the radio frequency (RF) input power in order to minimise the IM3 effect and obtain the best possible SFDR for the system.

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Available abstract

Third order intermodulation (IM3) can cause non-linearity effects which result in interference and crosstalk between the subcarriers in radio over fibre (ROF) transmissions. This paper presents the experimental results of the effect of varying the magnitude of the laser bias current on the IM3 in an ROF system with direct modulation. We also investigate the behaviour of the system spurious free dynamic range (SFDR) with the bias current variation. The results show that there will be an optimum bias current range for a given range of the radio frequency (RF) input power in order to minimise the IM3 effect and obtain the best possible SFDR for the system.

Key concepts: Spurious-free dynamic range, Intermodulation, Radio frequency, Dynamic range, Spurious relationship, Linearity, Electronic engineering, Crosstalk

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Effect of Laser Bias Current to the Third Order Intermodulation in the Radio over Fibre System — Research Paper | ScholarLens