Vollmer, Frank and Fischer, Peer (2007) Frequency-domain displacement sensing with a fiber ring-resonator containing a variable gap. Sensors and Actuators A: Physical, 134 (2). 410 - 413.
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Official URL: http://www.sciencedirect.com/science/article/B6THG...
Ring-resonators are in general not amenable to strain-free (non-contact) displacement measurements. We show that this limitation may be overcome if the ring-resonator, here a fiber-loop, is designed to contain a gap, such that the light traverses a free-space part between two aligned waveguide ends. Displacements are determined with nanometer sensitivity by measuring the associated changes in the resonance frequencies. Miniaturization should increase the sensitivity of the ring-resonator interferometer. Ring geometries that contain an optical circulator can be used to profile reflective samples.
|Uncontrolled Keywords:||Ring-resonator; Optical fiber; Displacement sensing; Optical resonance; Reflectance metrology; Optical circulator|
|Subjects:||Analytical Science > Nanotechnology for sensing and actuating|
|Deposited On:||08 May 2009 09:43|
|Last Modified:||08 May 2009 09:43|
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