Highly transparent ceramics for the spectral range from 1.0 to 60.0 µm based on solid solutions of the system AgBr–AgI–TlI–TlBr

Abstract

The article is devoted to the technology for obtaining optical ceramics of AgBr−TlI and AgBr−TlBr 0.46 I 0.54 systems and manufacturing samples with different compositions. The new heterophase crystal ceramics are transparent without absorption windows in the spectral range from 1.0 to 60.0 μm. In the ceramics' transparency spectra based on the AgBr−TlI and AgBr−TlBr 0.46 I 0.54 systems fusibility diagrams, with an increase in the thallium halides mass fraction, as well as the replacement of the bromine ion with iodine, the maximum transparency shifts to a long infrared region.

Ring-Core Photonic Crystal Fiber Sensor Based on SPR for Extra-Wide Refractive Index Detection

“…PCF-SPR sensors are integrated with the superiorities of both the PCF and SPR sensing techniques [4,5]. On the one hand, surface plasmon resonance (SPR) is a physical optical phenomenon that occurs at the metal/dielectric interface, which is extremely sensitive to the RI of the surrounding medium [6][7][8][9]. On the other hand, PCF is a new type of microstructured optical fiber with periodically arranged air holes introduced into the cladding, which has been widely used in fiber optic communication, fluorescence enhancement, and other fields due to the flexibility of the structural design.…”

Comparative spectroscopic investigation of Dy3+ ions in different sesquioxide solid solution ceramics

“…Sesquioxide, belonging to the bixbyite structure, has high thermal conductivity, broad emission band, and low phonon energy, which make it a potential laser matrix material 14–16 . Moreover, the sesquioxide solid solution has higher structural disorder and symmetry distortion, which is conducive to the broadening of the absorption and emission lines 17,18 . Owing to their high melting point (>2400°C), it is extremely difficult to grow sesquioxide single crystals, 19 whereas large‐size and high‐doped sesquioxide ceramics are relatively easy to prepare 20–22 .…”

“…[14][15][16] Moreover, the sesquioxide solid solution has higher structural disorder and symmetry distortion, which is conducive to the broadening of the absorption and emission lines. 17,18 Owing to their high melting point (>2400 • C), it is extremely difficult to grow sesquioxide single crystals, 19 whereas large-size and high-doped sesquioxide ceramics are relatively easy to prepare. [20][21][22] However, there were few reports on the visible spectra of Dy-doped sesquioxide ceramics.…”

Fiber bundle optical system: imaging modeling and analysis

“…In recent years, the development technology of infrared FB has made significant progress 6 – 10 It has the advantages of broad coverage of the infrared band, low transmission, and crosstalk rate. However, the infrared discrete sampling optical system with FB and CCD detectors has a large sampling spacing owing to manufacturing limitations.…”