Tech Briefs Magazine - November 2023 - PIT-2

Chalcogenide Materials:
Revolutionizing Optical Performance in
Response to Germanium Export Constraints
T
he field of optics has long relied
on traditional materials
like germanium for a range
of applications, from infrared
imaging to spectroscopy. However, recent
challenges stemming from germanium
export restrictions in China
have sparked a search for alternative
materials. In this article, we delve into
the emergence of Chalcogenide materials
as a strategic response to these
constraints, exploring their unique
advantages, applications, and contributions
to the future of optical technologies.
Chalcogenide
materials belong to
a distinctive class of compounds containing
elements from the chalcogen
group, including sulfur (S), selenium
(Se), and tellurium (Te). These elements,
when combined, create materials
with exceptional optical properties,
positioning them as worthy
substitutes for traditional germanium
optics. Chalcogenide materials have
emerged as a germanium substitute
primarily because they meet and often
exceed the optical characteristics
required in the optics industry. These
unique glass types not only replace,
but in many cases, enhance optical
performance in numerous applications.
The most notable key performance
advantages of chalcogenide
are outlined in the next section.
Advantages of Chalcogenides
Over Germanium
In designing infrared optical systems,
the greatest advantage chalcogenide
glasses have over germanium
shows up when a designer is looking
to athermalize the optical system. The
advantage stems from the glass' lower
thermoptic coefficient which is closer
to the values other infrared optical materials
exhibit, and therefore allow for
easier athermalization.
2
Photonics & Imaging Technology, November 2023
Background Image: Vink Fan/Adobe Stock)

Tech Briefs Magazine - November 2023

Table of Contents for the Digital Edition of Tech Briefs Magazine - November 2023

Tech Briefs Magazine - November 2023 - Intro
Tech Briefs Magazine - November 2023 - Sponsor
Tech Briefs Magazine - November 2023 - Cov1
Tech Briefs Magazine - November 2023 - Cov2
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