Ultimate Spatial Resolution Realisation in Optical Frequency Domain Reflectometry with Equal Frequency Resampling
نویسندگان
چکیده
A method based on equal frequency resampling is proposed to suppress laser nonlinear sweeping for the ultimate spatial resolution in optical domain reflectometry. Estimation inaccuracy of distribution caused by finite sampling rate auxiliary interferometer can be efficiently compensated method. With range 130 nm, a 12.1 µm experimentally obtained. In addition, limitation interferometer-based correction discussed. 200 m path delay interferometer, 21.3 realised at 191 fibre end. By employing and drawing tower FBG array enhance Rayleigh backscattering, distributed temperature sensing over 105 with 1 cm achieved. The measured uncertainty limited ±0.15 °C.
منابع مشابه
Digitally Range-Gated Optical Frequency Domain Reflectometry
Summary: We present a new optical frequency domain reflectometry technique which permits high frequency sweep repetition rates without sacrificing range. This technique could thus be adapted for remote and distributed acoustic sensing over long
متن کاملHigh-reflectivity-resolution coherent optical frequency domain reflectometry using optical frequency comb source and tunable delay line.
We propose a high-reflectivity-resolution coherent optical frequency domain reflectometry (OFDR) with a novel scheme of delay shift averaging (DSAV) by using an optical frequency comb source and a tunable delay line to suppress the fading noise. We show theoretically and experimentally that the novel DSAV scheme is equivalent, in realizing a high reflectivity resolution, to our previously repor...
متن کاملCapabilities and Limitations of Coherent Optical Frequency–domain Reflectometry
Optical time-domain reflectometry (OTDR), originally developed by Barnoski and Jensen in 1976 [1], is now a well-established tool for non-destructive characterization of optical networks and components. In general an ideal reflectometry system would have a spatial resolution high enough to locate closely separated sites of reflection within the network under test. In addition the sensitivity wo...
متن کاملHigh resolution optical frequency domain reflectometry for characterization of components and assemblies.
We describe a technique for polarization sensitive optical frequency domain reflectometry (OFDR) that achieves 22 micrometer two-point spatial resolution over 35 meters of optical length with -97 dB sensitivity in a single measurement taking only seconds. We demonstrate OFDR's versatility in both time- and frequency-domain metrology by analyzing a fiber Bragg grating (FBG) in both the spectral ...
متن کاملHigh-Quality Volume Rendering with Resampling in the Frequency Domain
This work introduces a volume rendering technique that is conceptually based on the shear-warp factorization. We propose to perform the shear transformation entirely in the frequency domain. Unlike the standard shear-warp algorithm, we allow for arbitrary sampling distances along the viewing rays, independent of the view direction. The accurate scaling of the volume slices is achieved by using ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Sensors
سال: 2021
ISSN: ['1424-8220']
DOI: https://doi.org/10.3390/s21144632