Performance of diode-pumped continuous wave tunable and passively Q-switched Nd,Mg:LiTaO3 laser

Feng, Tianli; Li, T.; Zhao, Shengzhi; Li, Q.; Yang, Kai; Zhao, Junqing; Qiao, Wenchao; Yin, Hao; Zhang, P.; Wang, Y.; Xu, Jianqiu

doi:10.1016/j.optcom.2014.03.088

Cited by 3 publications

(1 citation statement)

References 21 publications

(18 reference statements)

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“…The network architectures of the CNN can be complex and include operations that go beyond those performed by the individual neurons of the networks. These extensions have allowed CNNs to become the state-of-the-art solution to several categories of problems, most notably photographic image classification [58], [59], [60]. Our aim is to provide a clear evidence that the machine learning technique, in particular neural network, can be more efficient to the respect of other approaches to extract GW CCSNe signals, embedded in the detector noise and emitted in the far universe.…”

Section: B the Convolutional Neural Networkmentioning

confidence: 99%

New method to observe gravitational waves emitted by core collapse supernovae

et al. 2018

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While gravitational waves have been detected from mergers of binary black holes and binary neutron stars, signals from core collapse supernovae, the most energetic explosions in the modern Universe, have not been detected yet. Here we present a new method to analyse the data of the LIGO, Virgo and KAGRA network to enhance the detection efficiency of this category of signals. The method takes advantage of a peculiarity of the gravitational wave signal emitted in the core collapse supernova and it is based on a classification procedure of the time-frequency images of the network data performed by a convolutional neural network trained to perform the task to recognize the signal. We validate the method using phenomenological waveforms injected in Gaussian noise whose spectral properties are those of the LIGO and Virgo advanced detectors and we conclude that this method can identify the signal better than the present algorithm devoted to select gravitational wave transient signal.

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Section: B the Convolutional Neural Networkmentioning

confidence: 99%

New method to observe gravitational waves emitted by core collapse supernovae

et al. 2018

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Performance of LiTaO3 Crystals and Thin Films and Their Application

Xiao

Liang

et al. 2023

Crystals

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Lithium tantalate (LiTaO3, or LT) crystal is widely used in optical applications, infrared detection, and acoustic surface wave devices because of its excellent piezoelectric, pyroelectric, and nonlinear optical properties. In this paper, we discuss the defect structure of LT; the preparation method for LT; the influence of doping on LT; and LT’s application in optical, acoustic, and electrical devices. We mainly analyzed the structure and physical properties of LT crystal, the preparation of LT crystal and LT thin films, the periodic polarization of LT crystal, the reduction of LT wafers, and the application potential of LT crystals in lasers and acoustic surface filters according to the most recent research. We also provide an overview of future research directions for LT in the fields of acoustics, optics, and other fields. The applications of LT in 5G, 6G, SAW filters, nonlinear optical devices, and waveguides are expected to provide additional breakthroughs.

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Raman Scattering in a Double-Doped Single Crystal LiTaO3:Cr(0.2):Nd(0.45 wt%)

2022

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The Raman spectra of a lithium tantalate crystal doubly doped with chromium and neodymium LiTaO3:Cr(0.2):Nd(0.45 wt%) have been studied in this paper. Raman spectra of the first and second orders have been found to be located against the background of a luminescent halo with a maximum at ≈1250 cm−1. Several Raman bands have been detected in the frequency range of 900–2000 cm−1. Their frequencies were 940, 1034, 1113, 1171, 1250, 1343, 1428, 1491, 1582, 1735, 1838, and 1925 cm−1. These bands correspond to overtone processes. We have determined that the frequencies of 1838 and 1925 cm−1 bands are significantly higher than the exact value of the overtone frequency corresponding to the fundamental mode 4A1(z)LO (864 cm−1).

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Performance of diode-pumped continuous wave tunable and passively Q-switched Nd,Mg:LiTaO3 laser

Cited by 3 publications

References 21 publications

New method to observe gravitational waves emitted by core collapse supernovae

New method to observe gravitational waves emitted by core collapse supernovae

Performance of LiTaO3 Crystals and Thin Films and Their Application

Raman Scattering in a Double-Doped Single Crystal LiTaO3:Cr(0.2):Nd(0.45 wt%)

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