Digital holographic interferometric characterization of bent optical fibers

Wahba, H. H.; Kreis, Thomas

doi:10.1088/1464-4258/11/10/105407

Cited by 20 publications

(21 citation statements)

References 20 publications

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“…The reference beam reaches the CCD camera at a small incident angle with respect to the propagation direction of the object wave. Therefore, the off axis holographic configuration is used (Wahba & Kreis, 2009a, 2009b, 2009cYassien et al, 2010). In addition, the mirror M2 in the digital holographic setup is mounted on a piezoelectric transducer (PZT), which acts as the phase shifting tool.…”

Section: Fig 4 Digital Holographic Interferometric Set-upmentioning

confidence: 99%

“…This effect was recognized in holographic interferometric investigations combined with iterative calculations (Sweeney & Vest, 1973) as well as tomographic methods (Cha & Vest, 1981). Recently, digital holographic phase shifting interferometry with the aid of mathematical models, which consider the refraction of the incident rays, were used to investigate some optical parameters of fibrous materials (Wahba & Kreis, 2009a, 2009b, 2009cYassien et al, 2010). The refractive index profile and optical parameters of graded index fibres as well as the refractive index profile of bent optical fibres were determined with accuracy 2.3x10 -4 .…”

Section: Introductionmentioning

confidence: 99%

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Digital Holographic Interferometric Characterization of Optical Waveguides

Wahba¹,

El-Din²

2011

Advanced Holography - Metrology and Imaging

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Section: Fig 4 Digital Holographic Interferometric Set-upmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Digital Holographic Interferometric Characterization of Optical Waveguides

Wahba¹,

El-Din²

2011

Advanced Holography - Metrology and Imaging

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“…The reference beam reaches the CCD camera with a small incident angle with respect to the propagation direction of the object wave. Therefore, the off axis holographic configuration is considered 12,[19][20][21] . In addition, the mirror M2 in the digital holographic setup is mounted on a piezoelectric transducer (PZT), which acts as the phase-shifting tool.…”

Section: Holographic Arrangementmentioning

confidence: 99%

“…Also, the digital holographic interferometry (DHI) has been applied in diverse fields for determining the shape, deformation and refractive index variations of transparent media 18 . Digital holographic phase shifting interferometry was used to investigate some optical parameters of fibrous materials 12,[19][20][21] . The refractive index profile and shape parameter of graded index fiber as well as the refractive index profile of bent optical fibers were determined with accuracy 2.3x10-4.…”

Section: Introductionmentioning

confidence: 99%

Characterization of a waveguide written by a UV laser into a planar polymer chip by digital holographic interferometry

2011

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The optical-functional properties of an integrated-optical strip-waveguide in a planar polymer chip are presented in this article. The waveguide was directly written into the surface of a planar polymer chip by UV-laser irradiation. Digital holographic interferometric phase shifting method is used to calculate the refractive index profile of the waveguide. This profile contains one or two zones according to the parameters of UV-laser. The mode field distribution and the effective mode indices for each zone are obtained. The study shows that the optical-functional properties strongly depend on the UV-irradiation parameters. Several mostly independently occurring photochemical processes competing with one another are proposed to explain the formation and shape of the refractive index distribution.

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“…The coupling of DHM and polarization imaging digital holography was introduced in an investigation of induced birefringence in stressed samples 9,10,11 . In addition, the combination of DHM and phase shifting Interferometry are used to characterize optical fibers, optical waveguides and the induced refractive index profile of bent optical fibers 12,13,14,15,16 . Off-axis DHM using a deep ultraviolet wavelength has been confirmed to give resolution in the submicron and nanoscale range 17 .…”

Section: Introductionmentioning

confidence: 99%

Digital holographic microscopy for the study of nano-fibers

et al. 2013

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The advantages of digital holographic microscopy to record not only the intensity but also the optical phase are employed. The experimental arrangement comprises a Mach-Zehnder type interferometer with a microscopic objective of magnification 100x. The used camera is a 5 Mpixels Allied Vision Guppy Pro F-503 with a pixel pitch of 2.2 m. The lateral magnification is set to about 200x based on the standard MIL-STD-150A 1951 USAF resolution test target. The dimensions of the aggregated natural cellulose nanowhisker fibers used are in the range of some hundreds of nanometers, which are positioned in the front of the microscopic objective using a 3D translation stage in the object arm of the holographic setup. The recorded off-axis holograms are refocused using the angular spectrum method. The reconstructed complex field is used to calculate optical phase and intensity distributions of the object at different reconstructions depths. The dimensions and orientation of the fibers can be evaluated from the optical field at different depths. Then, the shape and textures along the aggregated natural cellulose nanowhisker fiber can be presented in 3D space. The nano fiber found to have the dimensions of mean width 223 nm, depth 308 nm and length of 8.1 m. Further, the mean local refractive index of the nano fibers can be calculated (n=1.501).

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Digital holographic interferometric characterization of bent optical fibers

Cited by 20 publications

References 20 publications

Digital Holographic Interferometric Characterization of Optical Waveguides

Digital Holographic Interferometric Characterization of Optical Waveguides

Characterization of a waveguide written by a UV laser into a planar polymer chip by digital holographic interferometry

Digital holographic microscopy for the study of nano-fibers

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