Ngā hua rapu - Xinyu Fan

We demonstrate an ultrahigh-resolution optical time domain reflectometry (OTDR) system by using a mode-locked laser as the pulse source and a linear optical sampling technique to detect the reflected signals. Taking advantage of the ultrashort input pulse, the large detection-bandwidth, as well as t...

Whakaahuatanga katoa

Ground penetrating radar (GPR) is widely used for subsurface object detection, but manual interpretation of hyperbolic features in B-scan images remains inefficient and error-prone. In addition, traditional forward modeling methods suffer from low computational efficiency and strong dependence on fi...

Whakaahuatanga katoa

Distributed fiber-optic vibration sensors based on phase-sensitive optical time-domain reflectometry ( <inline-formula> <tex-math notation="LaTeX">$\phi$</tex-math></inline-formula>-OTDR) have found many applications in various fields. In this paper, we analyze the...

Whakaahuatanga katoa

We demonstrate a novel method for obtaining high spatial resolution optical frequency domain reflectometry (OFDR) utilizing recirculating frequency shifter for broadening the optical frequency sweeping. Twelve times broadened optical frequency sweeping is achieved. We obtain 0.97 cm spatial resoluti...

Whakaahuatanga katoa

Knowledge distillation transfers knowledge from the teacher model to the student model, effectively improving the performance of the student model. However, relying solely on the fixed knowledge of the teacher model for guidance lacks the supplementation and expansion of knowledge, which limits the...

Whakaahuatanga katoa