High-power metal halide vapour lasers oscillating in deep ultraviolet, visible and middle infrared spectral ranges

Integrated optical phased arrays can be used for beam shaping and steering with a small footprint, lightweight, high mechanical stability, low price, and high-yield, benefiting from the mature CMOS-compatible fabrication. This paper reviews the development of integrated optical phased arrays in recent years. The principles, building blocks, and configurations of integrated optical phased arrays for beam forming and steering are presented. Various material platforms can be used to build integrated optical phased arrays, e.g., silicon photonics platforms, III/V platforms, and III–V/silicon hybrid platforms. Integrated optical phased arrays can be implemented in the visible, near-infrared, and mid-infrared spectral ranges. The main performance parameters, such as field of view, beamwidth, sidelobe suppression, modulation speed, power consumption, scalability, and so on, are discussed in detail. Some of the typical applications of integrated optical phased arrays, such as free-space communication, light detection and ranging, imaging, and biological sensing, are shown, with future perspectives provided at the end.

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Application Of Systems With Total Internal Reflection At Novosibirsk Free Electron Laser For Spectroscopy In The Terahertz Range

Siberian Journal of Physics ◽

10.54362/1818-7919-2016-11-3-72-82 ◽

2016 ◽

Vol 11 (3) ◽

pp. 72-82

Author(s):

Vasily Gerasimov ◽

Elvira Grigorieva ◽

Boris Knyazev ◽

Yuliya Choporova

Keyword(s):

Free Electron ◽

Free Electron Laser ◽

Quantum Cascade Lasers ◽

Attenuated Total Reflection ◽

Terahertz Range ◽

Optical Systems ◽

Early Diagnosis Of Cancer ◽

Infrared Spectral ◽

Atr Spectroscopy ◽

Spectral Ranges

Attenuated total reflection (ATR) spectroscopy is widely used in the visible and infrared spectral ranges. Progress in the development of laboratory scale monochromatic sources of terahertz radiation, such as quantum cascade lasers, suggests that in the near future this kind of spectrometers will be widely spread in the terahertz range. For this reason, the development of ATR based methods and devices is highly relevant. In this paper, we discuss the features of the use of ATR spectroscopy in the terahertz range, and describe some of the optical systems, designed for experiments at the Novosibirsk free electron laser (NovoFEL). We show that in the terahertz range the ATR spectroscopy has a number of significant advantages over the absorption spectroscopy. As an example, we are discussing the possibility of using terahertz polarimetry to develop a method for early diagnosis of cancer via the detection of left-handed to right-handed polysaccharide enantiomers ratio. Spectra of selected polysaccharides were recorded with a standard Fourier spectrometer using developed by us an ATR unit. The possibility of studying the polarization characteristics of polysaccharides in aqueous solutions using spectrally selective polarimeter with the NovoFEL as a tunable radiation source was demonstrated.

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Development of High-Quality Nonlinear Optical Crystal CsLiB6O10 and Its Application to High-Power Picosecond Deep-Ultraviolet Pulse Generation

The Review of Laser Engineering ◽

10.2184/lsj.43.1_23 ◽

2015 ◽

Vol 43 (1) ◽

pp. 23

Author(s):

Masashi YOSHIMURA ◽

Yosuke ORII ◽

Yoshinori TAKAHASHI ◽

Hiroaki ADACHI ◽

Mieko YAMAGAKI ◽

...

Keyword(s):

High Power ◽

Nonlinear Optical ◽

Pulse Generation ◽

Nonlinear Optical Crystal ◽

High Quality ◽

Deep Ultraviolet ◽

Optical Crystal

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Combustion Synthesis and Infrared Characterization of TiB2

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.602-603.142 ◽

2014 ◽

Vol 602-603 ◽

pp. 142-145

Author(s):

Su Li ◽

Jun Shou Li ◽

Fang Zhao ◽

Ming Yuan Wang ◽

Xiao Juan Wu

Keyword(s):

Hydrochloric Acid ◽

Wave Band ◽

Qualitative And Quantitative Analysis ◽

Qualitative And Quantitative ◽

High Temperature Synthesis ◽

Hexagonal Shape ◽

Before And After ◽

Infrared Spectral ◽

Middle Infrared

On the basis of magnesiothermy, with Mg powder, TiO2 powder and B2O3 powder as mixed reactants, relatively pure TiB2 powder was prepared by self-propagating high temperature synthesis (SHS) after leached in diluted hydrochloric acid with the suitable concentration. The product after leached was examined by XRD for qualitative and quantitative analysis, SEM for morphology analysis and infrared spectroscopy for transmittance analysis. It was found that diluted hydrochloric acid could decrease most of the impurities, and the proportion of TiB2 phase in the product is more than 99%, which was hexagonal shape crystal with the grain size of 200-300 nm. Compare with the infrared spectrogram of the middle infrared spectral region of the product of before and after acid pickling, it was found that the transmittance of TiB2 is extremely low in the range of 2000-4000 cm-1, which can be excellent infrared absorption material in the corresponding wave band.

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