Optical fiber geometry: Accurate measurement of cladding diameter

Young, Matt; Hale, Paul D.; Mechels, S. E.

doi:10.6028/jres.098.015

Cited by 15 publications

(11 citation statements)

References 9 publications

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“…Many of the fiber diameter measurement techniques developed to date are based on an analysis of interference fringes or diffraction patterns produced as a result of light scattering by an optical fiber under test [3][4][5][6][7][8][9][10][11]. The accuracy of these techniques is in the order of a few tens of nanometers, but complex equipment is required utilising spatial optics which involves complex measurement and signal processing.…”

Section: Indroductionmentioning

confidence: 99%

Studies of geometrical profiling in fabricated tapered optical fibers using whispering gallery modes spectroscopy

Kavungal¹,

Farrell²,

et al. 2018

Optical Fiber Technology

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This paper experimentally demonstrates a method for geometrical profiling of asymmetries in fabricated thin microfiber tapers with waist diameters ranging from ~10 to ~50 µm with submicron accuracy. The method is based on the analysis of whispering gallery mode resonances excited in cylindrical fiber resonators as a result of evanescent coupling of light propagating through the fiber taper. The submicron accuracy of the proposed method has been verified by SEM studies. The method can be applied as a quality control tool in fabrication of microfiber based devices and sensors or for fine-tuning of microfiber fabrication setups .

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Section: Indroductionmentioning

confidence: 99%

Studies of geometrical profiling in fabricated tapered optical fibers using whispering gallery modes spectroscopy

Kavungal¹,

Farrell²,

et al. 2018

Optical Fiber Technology

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“…(ii) One silica optical fibre, calibration grade, nominal cladding diameter 125.0 µm (the National Institute of Standards and Technology, USA, specifies the accuracy of these fibres to be better than 0.1 µm [9]), to determine the sensor sensitivity for a transparent, cylindrical surface with a radius comparable to the radius of a contact lens edge and to measure the wobble of the θ rotational stage.…”

Section: Instrument Performancementioning

confidence: 99%

A 3D optical profilometer using a compact disc reading head

Ehrmann

Schindhelm

1998

Meas. Sci. Technol.

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The design, construction and performance of a novel optical profilometer based on the laser reading head of a compact disc player is described. The instrument is capable of self-guided scanning along arbitrary contours by utilizing the focus and radial tracking signals from the sensor head. The sensor is mounted on an x, y, motorized stage. The radial tracking signal provides the feedback for the angular position of the sensor, ensuring that the optical axis of the sensor is always perpendicular to the profile preventing the signal loss that occurs in conventional profilometers due to deflection of the light beam. The focus signal has a sensitivity in the nanometre range which makes the precision of the stages used to perform the scanning movements the dominant limiting factor for the measuring accuracy. The sensor head intermittently follows the contour, collecting datapoints at a predetermined lateral resolution. The profile is digitized in the form of x, y, and coordinates for each scanpoint. The accuracy of the instrument was verified by scanning standard measures with flat and circular cross sections. The mechanical structure of the prototype instrument was purpose built for the measurement of rigid corneal contact lenses. Various lenses have been measured and profile graphs are illustrated.

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“…Consequently, industry needs a standard so that they can correct for this systematic error. The National Institute of Standards and Technology (NIST) has developed a contact micrometer that can make cladding-diameter measurements accurate to 0.04 µm [3]. The contact micrometer is used to certify standard reference material (SRM) fibres that have been commercially available since 1993.…”

Section: Introductionmentioning

confidence: 99%

A statistical model for cladding diameter of optical fibres

Wang

Drapela²

2003

Metrologia

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The National Institute of Standards and Technology has developed a contact micrometer for accurate measurement of the outer diameter of optical fibres. The contact micrometer is used to measure reference fibres that are artefacts used by the telecommunications industry for calibrating their own measurement systems. We present a model for diameters measured by the contact micrometer. Based on this model, the probability distribution of the diameters is derived and two diameter estimates are presented. We illustrate and compare the diameter estimates using simulated data.

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Optical fiber geometry: Accurate measurement of cladding diameter

Cited by 15 publications

References 9 publications

Studies of geometrical profiling in fabricated tapered optical fibers using whispering gallery modes spectroscopy

Studies of geometrical profiling in fabricated tapered optical fibers using whispering gallery modes spectroscopy

A 3D optical profilometer using a compact disc reading head

A statistical model for cladding diameter of optical fibres

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