Phase-shift technique for the measurement of chromatic dispersion in single-mode optical fibres using LEDs

Costa, B.; Puleo, M.; Vezzoni, E.

doi:10.1049/el:19830729

Cited by 31 publications

(9 citation statements)

References 1 publication

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“…3 shows the theoretically expected (dashed lines) and measured (solid lines) curves for power transmission and group delay in transmission versus frequency detuning for this grating. The group delay was measured using a modulation phase-shift technique [38], [39] which is the more commonly used method for the characterization of FBGs.…”

Section: A Single Barriermentioning

confidence: 99%

“…The Bragg resonance was set near 1550-nm wavelength. For such structures, both transmission spectra and group delays were measured using a phase-shift technique [38], [39] with a spectral resolution of 2 pm. As an example, the measured spectral transmission and group delay curves versus frequency detuning of the DB FBG with are shown in Fig.…”

Section: B Double Barriermentioning

confidence: 99%

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Superluminal pulse propagation in linear and nonlinear photonic grating structures

Longhi

Marano

Belmonte³

et al. 2003

IEEE J. Select. Topics Quantum Electron.

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Optical pulse propagation in photonic grating structures can show anomalous (i.e., superluminal or negative) group velocities under certain circumstances owing to the anomalous dispersive properties induced by the periodic grating structure. Such phenomena can be observed for either linear pulse propagation in passive dielectric grating structures, such as in fiber Bragg gratings (FBGs), as well as in frequency-conversion processes exploiting second-order cascading effects in quasi-phase-matched (QPM) nonlinear crystals. Engineering of the grating structure can be exploited to observe a wide variety of anomalous pulse transmission and reflection behaviors. In this article, we review the main recent experimental and theoretical achievements obtained by our group in this field. In particular, we report on superluminal propagation of picosecond optical pulses at the 1.5-m wavelength of optical communications in FBGs, both in transmission and reflection configurations, with the observation of group velocities as large as 5 0. We also show that the phenomenon of transparent pulse propagation at a negative group velocity in a gain doublet atomic amplifier, recently observed in cesium vapor by Wang and co-workers (L. J. Wang, A. Kuzmich, and A. Dogariu, Nature vol. 406, pp. 277-279, 2000), can be achieved as well in a photonic parametric amplifier by exploiting the anomalous dispersive properties of the amplifier induced by a suitably designed QPM grating profile.

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Section: A Single Barriermentioning

confidence: 99%

Section: B Double Barriermentioning

confidence: 99%

Superluminal pulse propagation in linear and nonlinear photonic grating structures

Longhi

Marano

Belmonte³

et al. 2003

IEEE J. Select. Topics Quantum Electron.

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“…By varying the wavelength of the tunable laser, the RF phase delay as a function of the source wavelength, f ¼ f l ð Þ, can be obtained [17,18]. To measure this wavelength-dependent propagation delay, the optical source is modulated by a sinusoidal wave and the propagation delay can be evaluated by the relative phase retardation of the received RF signal.…”

Section: Modulation Phase Shift Methodsmentioning

confidence: 99%

Optical Fiber Measurement

Hui¹,

O’Sullivan²

2009

Fiber Optic Measurement Techniques

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“…Here, time-of-flight [7] and phase shift [8] techniques are commonly employed; however, these require very long fiber lengths of the order of tens of km. On the other hand, dispersion measurement techniques that can use short fiber samples are commonly based on low-coherence interferometry (LCI).…”

Section: Introductionmentioning

confidence: 99%

Fast and broadband fiber dispersion measurement with dense wavelength sampling

Ponzo¹,

Petrovich²,

Feng³

et al. 2014

Opt. Express

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Abstract:We report on a method to obtain accurate dispersion measurements from spectral-domain low-coherence interferograms, which enables high accuracy (~ps/nm/km), broadband measurements and the determination of very dense (up to 20 points/nm over 500 nm) datasets for both dispersion and dispersion slope. The method exploits a novel phase extraction algorithm which allows the phase associated with each sampling point of the interferogram to be calculated and provides for very accurate results as well as a fast measurement capability, enabling close to real time measurements. The important issue of mitigating the measurement errors due to any residual dispersion of optical elements and to environmental fluctuations was also addressed. We performed systematic measurements on standard fibers which illustrate the accuracy and precision of the technique, and we demonstrated its general applicability to challenging problems by measuring a carefully selected set of fibres: a lead silicate microstructured fiber with a flat, near-zero dispersion profile; a hollow core photonic bandgap fiber with strongly wavelength-dependent dispersion and dispersion slope; a small core, highly birefringent index guiding microstructured fiber, for which polarization resolved measurements over an exceptionally wide (~1000 nm) wavelength interval were obtained. 2013 Optical Society of America

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Phase-shift technique for the measurement of chromatic dispersion in single-mode optical fibres using LEDs

Cited by 31 publications

References 1 publication

Superluminal pulse propagation in linear and nonlinear photonic grating structures

Superluminal pulse propagation in linear and nonlinear photonic grating structures

Optical Fiber Measurement

Fast and broadband fiber dispersion measurement with dense wavelength sampling

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