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Multispectral Chalcogenide Glasses Transmitting from Visible to Lwir

SSRN Electronic Journal
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  • Usage
    254
    • Abstract Views
      202
    • Downloads
      52
  • Ratings
    • Download Rank
      779,323

Article Description

Chalcogenide glass (ChG) has become one of the essential infrared (IR) lens materials in passively athermalized LWIR devices. However, no multispectral (MS) ChG capable of large-size fabrication raises challenges to the development and popularization of MS imaging system combining visible, near-, and mid-IR. In this work, we introduce a new method of three-stage DSC to evaluate the glass-forming ability (GFA) of ChG through precisely simulating the melt-quenching process of chalcogenide melt in vacuum-sealed silica ampoule. A novel ChG capable of a record-big (Φ 130 mm) fabrication is developed through the modification of GeS2-Ga2S3-CsCl glass with Sb2S3 introduction. Its transmission window is characterized ranging from 0.51 to 11.2 µm, which could be tuned toward longer wavelength via the partial substitution of S by heavier Se. This work not only shows an innovated MS ChGs of promising applications, but also introduces a simple and convenient technique for screening ChGs with ultrahigh GFA.

Bibliographic Details

Linling Tan; Dan Chen; Yanqing Fu; Yixiao Gao; Shiliang Kang; Chengwei Gao; Shixun Dai; Changgui Lin

Elsevier BV

Multispectral imaging; LWIR; chalcogenide glass; glass-forming ability; large-size fabrication

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