Optical Single-Sideband Modulators and Their Applications

Loayssa, Alayn; Hernandez, R.; Benito, D.

doi:10.1080/01468030490269233

Cited by 7 publications

(8 citation statements)

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“…Typical parameters of a standard single mode fiber operating at 1.55 m are assumed: loss coefficient of 0.2 dB/km, dispersion parameter of 17 ps/(nm/km), and nonlinearity coefficient of 1.9 W 1 km 1 . The conversion factors are calculated as in [3]. The optical amplifiers have a noise figure, F D 3:5 dB.…”

Section: Analytical Predictions and Validationmentioning

confidence: 99%

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Relative Intensity Noise in Optical Single Side Band Systems with Multiple In-Line Amplifiers: Analysis and Validation

Laurencio

Medeiros

2008

Fiber and Integrated Optics

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This article analyzes and validates through simulation the influence of fiber nonlinearity, dispersion, and loss on the Relative Noise Intensity (RIN) spectrum at fiber output in externally modulated optical single side band (OSSB) systems. The analysis includes the RIN generated by the laser source, the effect of the OSSB modulator, and noise generated by the in-line optical amplifiers. The analysis takes into account conversion between phase noise and intensity noise introduced by fiber transmission. It is shown that, depending on the operating conditions, the system performance may be predominantly affected either by the laser RIN or by the noise generated by the in-line optical amplifiers. The impact of the OSSB modulator can be relevant when the RIN of the system is dominated by the laser noise and should therefore be considered.

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Section: Analytical Predictions and Validationmentioning

confidence: 99%

“…They can be classified into optical heterodyning techniques, filtering methods, and OSSB external modulators [3]. In this article, we focus on OSSB systems employing external modulation.…”

Section: Introductionmentioning

confidence: 99%

Relative Intensity Noise in Optical Single Side Band Systems with Multiple In-Line Amplifiers: Analysis and Validation

Laurencio

Medeiros

2008

Fiber and Integrated Optics

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“…The simplest design based on a dual-electrode Mach-Zehnder electrooptic modulator driven by electrical signals with a 90 phase-shift (Hilbert transformed). Other designs also use Hilbert transformed electrical signals applied to either a series combination of intensity and phase modulator or other configurations [7], [8]. Recently, an optoelectrical filter for 40 GHz OSSB generation has been demonstrated [9].…”

Section: Transmission Limitation In Radio Over Fiber Networkmentioning

confidence: 99%

RoFnet – Reconfigurable Radio over Fiber Network Architecture Overview

Medeiros,

Avó,

Laurˆencio

et al. 2009

JTIT

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This paper introduces the basic operational concepts of the RoFnet – reconfigurable radio over fiber network, which is a project supported by the Portuguese Foundation forScience and Technology. This project proposes an innovative radio over fiber optical access network architecture, which combines a low cost base station (BS) design, incorporating reflective semiconductor optical amplifiers, with fiber dispersion mitigation provided by optical single sideband modulation techniques. Optical wavelength division multiplexing (WDM) techniques are used to simplify the access network architecture allowing for different BSs to be fed by a common fiber. Different wavelength channels can be allocated to different BSs depending on user requirements. Additionally, in order to improve radio coverage within a cell, it is considered a sectorized antenna interface. The combination of subcarrier multiplexing with WDM, further simplifies the network architecture, by using a specific wavelength channel to feed an individual BS and different subcarriers to drive the individual antenna sectors within the BS.

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“…Optical single sideband (OSSB) modulation is regarded as one of the most promising techniques to deal with chromatic dispersion-induced power fading and improve the spectral efficiency in ROF systems [4]. Many methods have been proposed to implement OSSB modulation over the past few decades [5][6][7][8][9][10][11][12][13][14][15][16][17]. For instance, OSSB modulation can be realized by using a single sideband modulator, which can be a dual-drive Mach-Zehnder modulator (MZM) [5,6], four parallel phase modulators [7,8], a hybrid modulator consisting of an amplitude modulator and a phase modulator [9], two parallel electro-absorption modulators (EAMs) [10], or a bidirectional intensity modulator placed inside a Sagnac interferometer (SI) [11].…”

Section: Introductionmentioning

confidence: 99%

Optical single sideband polarization modulation for radio-over-fiber system and microwave photonic signal processing

Zhang¹,

Zhang²,

Pan³

2014

Photon. Res.

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An approach to implementing optical single sideband (OSSB) polarization modulation, which is a combination of two orthogonally polarized OSSB modulations with complementary phase differences between the optical carrier and the sideband, is demonstrated based on two cascaded polarization modulators (PolMs). The two PolMs are driven by two RF signals that are 90°out of phase. By properly adjusting the polarization state between the two PolMs, OSSB polarization modulation with large operation bandwidth can be realized. An experiment is performed. OSSB polarization modulation with an operation bandwidth from 2 to 35 GHz is successfully demonstrated. The spectral profile of the OSSB polarization-modulated signal is observed through an optical spectrum analyzer, and its complementary phase properties are analyzed by sending the signal to a photodetector (PD) for square-law detection. Due to the complementary phase differences between the optical carrier and the sideband along the two polarization directions, no microwave frequency component is generated after the PD. The generated OSSB polarization-modulated signal is transmitted through 25 and 50 km single-mode fiber with 50 Mbaud 16 quadrature amplitude modulation baseband data to investigate the transmission performance of the proposed system in radio-over-fiber applications, and very small error vector magnitude degradation is observed. OSSB polarization modulation is also employed to realize a microwave photonic phase shifter. A full-range tunable phase shift is obtained for 2 and 35 GHz microwave signals.

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Optical Single-Sideband Modulators and Their Applications

Cited by 7 publications

References 0 publications

Relative Intensity Noise in Optical Single Side Band Systems with Multiple In-Line Amplifiers: Analysis and Validation

Relative Intensity Noise in Optical Single Side Band Systems with Multiple In-Line Amplifiers: Analysis and Validation

RoFnet – Reconfigurable Radio over Fiber Network Architecture Overview

Optical single sideband polarization modulation for radio-over-fiber system and microwave photonic signal processing

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