Advanced LIGO lower suspension stage showing the monolithic portion and one of two upper metal masses.
Prototype Advanced LIGO fiber end.
Rendering of the dimensional characterization machine showing main components.
Dimensional characterization machine imaging head showing orthogonal camera setup and backlighting configuration.
Fiber cartridge system used to transport fibers between pulling and characterization machines (shortened length version shown for clarity).
Cartridge clamp interfaces at (a) bottom (b) top of dimensional characterization machine.
Typical observed image of a circular cross section fiber neck. The central lighter region occurs due to backlight being transmitted through the fiber.
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.
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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