Temporal coherence properties of a dispersively propagating beam in a fiber-optic interferometer

Shibata, Nori; Tsubokawa, Makoto; Nakashima, Torahiko; Seikai, Shigeyuki

doi:10.1364/josaa.4.000494

Cited by 14 publications

(6 citation statements)

References 12 publications

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“…Low-coherence light sources are usually used to measure the group delay dispersion with sub-picosecond resolution. The temporal coherence degrades when the interference involves two waves with different group velocity dispersions (GVDs) [7,8,9,10]. The influence is on the measurement accuracies of DGD and chromatic dispersion, since the curve shape of the degree of coherence, jj, with respect to the interference broadens as the GVD and fiber length increase.…”

Section: Introductionmentioning

confidence: 99%

“…As was introduced in Ref. [7], Hamilton et al [11] analyzed the coherence properties of a dispersively propagating wave such as electrons or neutrons in vacuo, or light in a medium, and discussed the observation of its spatial and temporal coherence properties by means of a two-beam interferometer. A numerical dispersion compensation technique has been also presented for optical coherence tomography [12].…”

Section: Introductionmentioning

confidence: 99%

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Square of the degree of coherence and dispersion-induced pulse broadening in a fiber-optic transmission

et al. 2016

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We describe a method for measuring optical pulse broadening with continuous wave beam emitted from a low-coherence source. A twobeam interferometer composed of nondispersive and dispersive arms makes it possible to obtain the dispersion-induced pulse broadening. Experiments are carried out using a standard single-mode fiber and a two-mode fiber in the 1560 nm-wavelength region. As a result, the square of the degree of coherence, |γ| 2 , well reflects the dispersion-induced pulse broadening for an unchirped Gaussian pulse. The theoretically derived relationship between these two physical phenomena well reflects the experimentally obtained results. Chromatic dispersion values obtained by the method are in good agreement with those obtained by the alternative method. The salient feature of the present method is clearly shown.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Square of the degree of coherence and dispersion-induced pulse broadening in a fiber-optic transmission

et al. 2016

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“…Scanning Michelson white light interferometers can be used to obtain such distributed polarization cross-talk measurements [3,5]. Unfortunately, as the length of the fiber under test (FUT) increases, the measured cross-talk peaks will be broadened due to birefringence dispersion [6], resulting in reduced spatial resolution and degraded crosstalk amplitude measurement accuracies [7][8][9] for PM fibers with a length exceeding a few hundred meters.…”

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confidence: 99%

“…The envelope of a measured cross-talk peak (the interference peak) is influenced by the SLED's spectral distribution and the birefringence dispersion ΔD of the PM fiber [6][7][8]. Assume that the SLED has a Gaussian spectral shape; the cross-talk envelope (the degree of coherence) γ can be derived as the function of birefringence dispersion ΔD and the distance Z of cross-talk point measured from the output [6][7][8]:…”

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Method for improving the resolution and accuracy against birefringence dispersion in distributed polarization cross-talk measurements

Zhang

Chen

et al. 2012

Opt. Lett.

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We present a novel method for improving the spatial resolution and amplitude accuracy of distributed polarization cross-talk measurements in a polarization maintaining (PM) fiber against its birefringence dispersion. We show that the broadening of measured polarization cross-talk peaks caused by birefringence dispersion can be restored by simply multiplying the measurement data with a compensation function. The birefringence dispersion variable in the function can be obtained by finding the widths of measured cross-talk envelopes at known distances along the fiber. We demonstrate that this method can effectively improve spatial resolution and amplitude accuracy of the space-resolved polarization cross-talk measurements of long PM fibers.

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Interference phenomenon on the complex degree of coherence

Shibata

Watanabe

Ohashi

et al. 2019

Opt Rev

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Temporal coherence properties of a dispersively propagating beam in a fiber-optic interferometer

Cited by 14 publications

References 12 publications

Square of the degree of coherence and dispersion-induced pulse broadening in a fiber-optic transmission

Square of the degree of coherence and dispersion-induced pulse broadening in a fiber-optic transmission

Method for improving the resolution and accuracy against birefringence dispersion in distributed polarization cross-talk measurements

Interference phenomenon on the complex degree of coherence

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