Company - Apsidal
Product/Service - Universal Glass Optics Manufacturing Module
- Classification
- In-Space Manufacturing
- Category
- In-Space Manufacturing
ISS Utilization Service
- Fields
- ZBLAN
Optical Fibers
Glass
- Status
- Development, Demonstrated
- First launch
- 2022
- UNIGLO was a science and technology demonstrator whose ISS mission had four primary scientific objectives: mapping thermal profiles in microgravity, measuring phase transitions in extic glasses, drawing ZBLAN fibers under microgravity conditions, and employing a novel custom laser-interferometer and an AI-feedback control system to improve spooled fiber quality in-situ.
- For this talk we will discuss glass- and crystallization-transition test results from the International Space Station (ISS) which essentially pave the way for advancing the production of high-valued exotic-glass optical fibers in low-Earth orbit. The comparative behavior of ZBLAN glass undergoing phase transitions in both microgravity and Earth’s gravitational environments was investigated and we find the bulk-glass to be more resistant to crystallization in space. However, the surface continues to be vulnerable under ambient conditions.
- We conducted a set of 10 differential-calorimetry tests in the Microgravity Science Glovebox, including 2 sets of controls. A similar number of control tests were performed on earth. We subjected our samples to very high temperatures exceeding 430 C and studied and identified various types of crystal formation. We identified several crystals that do manage to form in space that can be orders of magnitude larger and very well faceted.
- However the fluoride glass also seems to harden in microgravity and becomes more resistant to crystal growth in the bulk. This manner of data collection and metrology is vital to inform future mitigation strategies for manufacturing advanced exotic-glass optical fibers in space.
Status Comment / Notes
Assuming they are active as of 2024.
News, Research, Projects and Patents
| Title | Type | Date | Summary |
|---|---|---|---|
| Foust Forward | Manufacturing a low Earth orbit economy | Article | 2022-09-12 | > Apsidal’s De says a breakthrough is still possible with ZBLAN fiber, given enough effort. “Your successes sometimes come very suddenly,” he said. “You can see very large improvements come very quickly.” |
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