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Many persons in the marine science field including acousticians, hydrographers, oceanographers, fisheries scientists, engineers, educators, students … and equipment manufacturers will benefit greatly by reading all or part of this text. The author is to be congratulated on his fine contribution ….
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Buy Hardcover. Buy Softcover. FAQ Policy. About this book Presented in a clear and concise way as an introductory text and practical handbook, the 2nd Edition of this widely acclaimed book describes the basic physical phenomena governing underwater acoustical waves, propagation, reflection, target scattering and noise.
Show all. From the reviews: "Presented in a clear and concise way as an introductory text and practical handbook, the book provides the basic physical phenomena governing underwater acoustical waves, propagation, reflection, target backscattering and noise. Download Preface 1 PDF Recommended for you. PAGE 1. In addition, Si-based detectors are no longer a good option when the Raman scattered light is over 1 micron, so other type of detectors like those based in InGaAs must be used instead.
So all in all, it is a question of identifying the best trade-off. Nonetheless, many cases still require different wavelengths and different detectors. Apart from the wavelength of the laser source, there are other important figures to keep in mind from the joint perspective of the laser manufacturer and the Raman equipment integrator, which are listed below:. The power stability is important mainly for quantification purposes and it is linked to the integration time necessary to obtain a spectrum.
Optical isolators must be used. Raman spectroscopy is gaining presence in bio-science given its non-invasive nature. Raman spectroscopy can be found—for instance—in:. Based on signal enhancement techniques like SERS it is possible to design on-line monitoring systems for food safety and food quality control. In the past decades, since the food industry is more profit driven and the globalization of the marked is progressing, the consumers are more and more concerned about the food quality in mass production .
These concerns are based on real evidences, which proof a link between harmful food and health diseases.
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Some of them are analyzed and named by [12, 13]. The connection between health and food quality works in both directions, harmful food can cause diseases and healthy food can improve mental and physical body strength [10, 11]. These examples can be taken as motivation to ensure high quality food products. A reliable quality control can—thanks to Raman spectroscopy especially SERS as well as other spectroscopy methods—easily be implemented into the production process. An overview concerning food safety and quality control can be found in [14, 16] and  describes, for instance, how pesticides on fruit surfaces can be detected.
Figure 2. Also available as free-space version. Monocrom offers a broad variety of wavelength and output power combinations. Our S-series depicted in Fig. It comes with free-space or with SM-fiber output. Monocrom offers a broad spectrum of wavelength and output power combinations. Single frequency versions are available with a linewidth as low as a few tens of MHz and a high side mode suppression ratio SMSR of typically 50 dB. On the other hand side the SM-fiber coupling capabilities deliver superb beam quality, which is mandatory for a high brightness Br see Eq.
The latter is important in Raman microscopy applications. Moreover, it opens the possibility to use PM-fibers for polarization depending Raman spectroscopy. Due to the high available output power the laser is suitable for remote Raman spectroscopy.
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Thanks to the high fundamental pulse energy, frequency conversion to the 2nd, 3rd or 4th harmonic are easily possible with high E pulse , harm. Raman, K. Landberg, L. Smith and G.
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Dong, S. Li, J. Toggle navigation. Home Applications. Mars exploration. Retinal photocoagulation. Pattern Projection. Start Here. Pumping Heads. Solid State Lasers.