Linearization of Phase-Modulated Analog Optical Links Employing Interferometric Demodulation

McKinney, Jason D.; Colladay, Kristina; Williams, K.J.

doi:10.1109/jlt.2008.929409

Cited by 45 publications

(20 citation statements)

References 18 publications

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“…And finally, the RF signal can be directly recovered by a PD. The photocurrent output of the PD is given as follows with the MZI set at quadrature [11]:…”

Section: Principlementioning

confidence: 99%

A Novel Measurement Approach for the Half-wave Voltage of Phase Modulator based on PM-MZI Photonic Link

Li¹,

Yang²,

Ye³

et al. 2014

Journal of the Optical Society of Korea

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This paper presents a new method for measuring the half-wave voltage V π of an electro-optic phase modulator based on a phase-modulated photonic link with interferometric demodulation. By using this method, the V π can be obtained with the RF voltage amplitude input required to achieve 1-dB gain compression of link and the differential delay of a Mach-Zehnder interferometer. We measure the V π of a commercial phase modulator by using the presented method and the carrier/the first sideband intensity ratio method. Furthermore, we compare the two measurements with the typical value provided by the manufacturer. The experiment shows that this novel measurement method is feasible, straightforward, and accurate.

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“…And finally, the RF signal can be directly recovered by a PD. The photocurrent output of the PD is given as follows with the MZI set at quadrature [11]:…”

Section: Principlementioning

confidence: 99%

A Novel Measurement Approach for the Half-wave Voltage of Phase Modulator based on PM-MZI Photonic Link

Li¹,

Yang²,

Ye³

et al. 2014

Journal of the Optical Society of Korea

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“…However, the π-phase-difference of the AE1st-order sidebands after phase modulation process will cancel each other while beating with optical carrier at a photodetector (PD); therefore, an effective and stable conversion of phase modulation (PM) to intensity modulation (IM) is indispensable in phase modulated RoF links. A number of schemes have been proposed including dispersive fiber [5], fiber grating [6], Brillouin amplification [7], and interferometer detection [8], etc. Amongst, utilizing a length of dispersive fiber is the easiest way to implement.…”

Section: Introductionmentioning

confidence: 99%

Frequency response equalization in phase modulated RoF systems using optical carrier Brillouin processing

Zheng

Chi

et al. 2011

Front. Optoelectron. China

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A novel method is demonstrated to tunably compensate dispersion effect in phase modulated radio over fiber (RoF) links using an optical carrier Brillouin processing technique, which is based on stimulated Brillouin scattering (SBS) to control the phase shift of optical carrier in the modulated lightwave signal. Since this phase shift can be dynamically tuned, frequency response can be tunably improved. Both simulation and experimental results show that a uniform frequency response ranging from 1-12 GHz with a fluctuation of less than AE1 dB can be obtained by an optimal phase shift on the optical carrier.

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“…As a result, there has been much interest in achieving very low halfwave voltages (a measure of modulator efficiency) and very high average photocurrent levels as these enable extremely low noise figure analog links [7], [8]. In addition to increased modulator efficiency, there is also significant interest in improving link linearity by mitigating the inherent nonlinearity of the MZM through the use of various linearized modulators [9], [10], the wavelength- [11] or polarization-dependence [12] of Mach-Zehnder modulators, or through linearized phase-modulated links [13]- [15]. While these techniques have been utilized to achieve spur(ious)-free dynamic ranges in excess of 130 dB (in a 1-Hz bandwidth), such demonstrations have only been performed in modest-photocurrent links ( mA).…”

Section: Introductionmentioning

confidence: 99%

Optical Comb Sources and High-Resolution Optical Filtering for Measurement of Photodiode Harmonic Distortion

McKinney

Leaird

Hastings

et al. 2010

J. Lightwave Technol.

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Abstract-In this work we preset a new technique for measurement of harmonic distortion in microwave photodiodes. Our technique combines optical combs and high-resolution optical filtering to provide a pure optical two-tone excitation of the photodiode. Our technique removes the challenges presented by laser frequency drift and modulator bias control by utilizing a single laser and phase-modulation to synthesize the optical combs. We demonstrate our technique through measurement of the harmonic distortion generated in a commercial InGaAs photodiode and compare our results with those obtained via phase-locked laser measurements. We show that this technique provides essentially equivalent measurement fidelity to phase-locked laser techniques while offering decreased system complexity. We additionally provide a general discussion of the limits of nonlinearity measurements performed using optical heterodyne techniques.

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Linearization of Phase-Modulated Analog Optical Links Employing Interferometric Demodulation

Cited by 45 publications

References 18 publications

A Novel Measurement Approach for the Half-wave Voltage of Phase Modulator based on PM-MZI Photonic Link

A Novel Measurement Approach for the Half-wave Voltage of Phase Modulator based on PM-MZI Photonic Link

Frequency response equalization in phase modulated RoF systems using optical carrier Brillouin processing

Optical Comb Sources and High-Resolution Optical Filtering for Measurement of Photodiode Harmonic Distortion

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