کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1533679 1512560 2016 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Improving OFDR spatial resolution by reducing external clock sampling error
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Improving OFDR spatial resolution by reducing external clock sampling error
چکیده انگلیسی
Utilizing an auxiliary interferometer to produce external clock signals as the data acquirement clock is widely used to compensate the nonlinearity of the tunable laser source (TLS) in optical frequency domain reflectometry (OFDR). However, this method is not always accurate because of the large optical length difference of both arms in the auxiliary interferometer. To investigate the deviation, we study the source and influence of the external clock sampling error in OFDR system. Based on the model, we find that the sampling error declines with the increase of the TLS's optical frequency tuning rate. The spatial resolution can be as high as 4.8 cm and the strain sensing location accuracy can be up to 0.15 m at the measurement length of 310 m under the minimum sampling error with the optical frequency tuning rate of 2500 GHz/s. Hence, the spatial resolution can be improved by reducing external clock sampling error in OFDR system.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optics Communications - Volume 363, 15 March 2016, Pages 74-79
نویسندگان
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