Abstract
We present a non-destructive and non-invasive imaging spectroscopic technique with a high spatial and spectral resolution based on the detection of the Rayleigh scattering field radiated out of a centimetric length and micrometric size optical waveguide in operation.
Highlights
The linear or nonlinear optical propagation behaviour lengthwise of micro- and nano- waveguides in operation is difficult to experimentally evaluate, this information is crucial for their optimal development
By analysing with a confocal spectrometer the Rayleigh scattering (RS) radiated out of an optical nanofibers (ONF) in operation, we show that our method can spatially characterize the entire ONF in the linear regime with a micrometric spatial resolution
CCD camera pictures of the fiber allow the measurement of the evolution of the fiber taper radius with the distance X. This analyzed fiber part includes the end of the non-stretched SMF fiber (62.5 μm), the taper region, and the ONF
Summary
The linear or nonlinear optical propagation behaviour lengthwise of micro- and nano- waveguides in operation is difficult to experimentally evaluate, this information is crucial for their optimal development. Apart from the destructive cut-back method, far-field qualitative imaging of Rayleigh scattering (RS) have been used for rapid analysis of the propagation of light in few-mode optical nanofibers (ONF) [1].
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