In this work, a neural network (NN) method is developed for pulse duration inferring for an erbium-doped fiber laser at 1550 nm. Experimentally, the interferometric autocorrelation trace is observed clearly with the use of the two-photon absorption (TPA)
Metsurfaces continue to find an increasing number of applications. We provide a brief explanation of how metasurfaces can be used for three-dimensional imaging, as demonstrated by C. Jin et al in Advanced Photonics, Volume 1, Issue 3.
We propose a fully distributed fusion system combining phase-sensitive optical time-domain reflectometry (Φ-OTDR) and OTDR for synchronous vibration and loss measurement by setting an ingenious frequency sweep rate (FSR) of the optical source. The relatio