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Apparatus for dimensional characterization of fused silica fibers for the suspensions of advanced gravitational wave detectors
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View: Figures


Image of FIG. 1.
FIG. 1.

Advanced LIGO lower suspension stage showing the monolithic portion and one of two upper metal masses.

Image of FIG. 2.
FIG. 2.

Prototype Advanced LIGO fiber end.

Image of FIG. 3.
FIG. 3.

Rendering of the dimensional characterization machine showing main components.

Image of FIG. 4.
FIG. 4.

Dimensional characterization machine imaging head showing orthogonal camera setup and backlighting configuration.

Image of FIG. 5.
FIG. 5.

Fiber cartridge system used to transport fibers between pulling and characterization machines (shortened length version shown for clarity).

Image of FIG. 6.
FIG. 6.

Cartridge clamp interfaces at (a) bottom (b) top of dimensional characterization machine.

Image of FIG. 7.
FIG. 7.

Typical observed image of a circular cross section fiber neck. The central lighter region occurs due to backlight being transmitted through the fiber.

Image of FIG. 8.
FIG. 8.

Typical full fiber profile as obtained directly from the dimensional characterization machine, of a suspension fiber suitable for use in advanced gravitational wave detectors, pulled using the CO2 laser pulling machine.40 The plot shows high resolution measurements taken in the neck region of the fiber and lower resolution measurements taken in the midsection. Inset plot shows in more detail the high resolution scan of shaded area containing the first neck region of the fiber, with 800 μm dumbbell section to minimize thermoelastic loss.

Image of FIG. 9.
FIG. 9.

Scan of the edge position of a fiber end for illustrative purposes, showing the effect of a slight misalignment that has occurred during production.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Apparatus for dimensional characterization of fused silica fibers for the suspensions of advanced gravitational wave detectors