Rectangular membrane (scanning electron microscope image).
                        
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                        Loop antenna realized on an optical fiber; the fiber diameter is 125 µm.
                        
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                        Fiber cavity with membrane on the left fiber mirror.
                        
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                        Fiber micromachining setup.
                        
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                        Close-up of the central part with the actual cavity (length ~80 µm).
                        
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                        Two and four 3D-printed membranes stacked on top of a fiber mirror for collective optomechanical coupling to a fiber cavity.
                        
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