SMF-28 Ultra Temperature Test 22 C to 1000 C

This data was collected at The Ohio State University in 2021 

See article "Calibration of Distributed Temperature Sensors Using Commercially Availiable SMF-28 Optical Fiber from 22℃ to 1000 ℃" for more details about the experiment.

Thermocouple measured temperatures are provided in the associated test folders for each test.

The data is presented in two formats.

Processed Data: 

This data has been run through both a static reference method ("Default") and the adaptive reference method named "Inchworm" (D. C. Sweeney, A. M. Schrell, and C. M. Petrie, “An adaptive reference scheme to extend the functional range of optical backscatter reflectometry in extreme environments,” IEEE Sensors J., vol. 21, no. 1, pp. 498-509, Jan. 2021, doi: 10.1109/JSEN.2020.3013121.)  This would be the data to use if future researchers are just interested in performing a more in-depth analysis of what the fiber indicated was occurring (rate of drift, magnitude of drift, etc.)

The "Default" output consists of 4 files

*shift_out_default.txt contains the spectral shift data as a function of time and location along the fibers as processed using the first scan of the test as the reference scan.

*quality_out_default.txt contains the quality of the spectral shift correlation as a function of time and location along the fibers as processed using the first scan of the test as the reference scan.

*connection_out_default.txt contains the index of the scan used for determination of the spectral shift as a function of time and location along the fibers (this is always 0 for "Default" method)

*amplitude_out_default.txt contains the measured amplitude of the fiber signal at time and location along the fiber specified.  This data is not the same as the raw scan data.

The "Inchworm" output consists of 5 files

*shift_out_inchworm.txt contains the cumulative spectral shift since the beginning of the test as a function of time and location along the fibers as processed using the reference scans indicated in the connection_out_inchworm.txt file.

*diffshift_out_inchworm.txt contains the incremental spectral shift since the last reference scan change as a function of time and location along the fibers as processed using the reference scans indicated in the connection_out_inchworm.txt file.

*quality_out_inchworm.txt contains the quality of the spectral shift correlation as a function of time and location along the fibers as processed using the reference scans indicated in the connection_out_inchworm.txt file.

*connection_out_inchworm.txt contains the index of the scan used for determination of the spectral shift as a function of time and location along the fibers.

*amplitude_out_inchworm.txt contains the measured amplitude of the fiber signal at time and location along the fiber specified.  This data is not the same as the raw scan data.

Raw Data:

This data is the raw data output collected by the OBR during the testing and would be the data to use if one were to apply new data processing algorithms. The data is stored in a format which is unique to the OBR 4600 instrument supplied by Luna Innovations Inc.  We provide no guidance on how to read this data. This would be the data to use if future researchers are evaluating new data processing algorithms. This would also be the data to use if future researchers are interested using the more extensive time or frequency domain data collected by the ORB to evaluate fiber effects (return loss, group delay, etc.)