“Researchers have developed a hair-thin microphone made entirely of silica fiber that can detect a large range of ultrasound and withstand temperatures up to 1,000 °C. It features a vibration-sensitive membrane and an internal glass micro-beam that is suspended inside a single-mode optical fiber. Credit: Xiaobei Zhang, Shanghai University”(ScitechDaily, This Microphone Made of Glass Can Survive Extreme Heat and Electromagnetic Chaos)
Ordinary glass can transform microphone technology. Additionally, it can transform data transportation. In glass microphones, one of the most interesting things is that they can withstand temperatures of up to 1000 degrees Celsius. That allows researchers to use it in extremely high temperatures. The system involves a sensitive membrane. Along. With the internal microbeam, which the system uses as a measurement tool. This is one of the things that can revolutionize signal technology.
The same technology that makes it possible. To use the glass as a microphone. Makes it possible. To use the glass as a quantum network or quantum sensor. When a laser beam travels through the glass. If something presses it. This. Causes an anomaly. In. The quantum channel. And that causes a change in the laser beam that travels in that channel.
“Continuous-variable (CV) quantum information processing, which underpins technologies such as quantum key distribution (QKD) and quantum random number generation (QRNG), depends on accurately measuring the phase and amplitude of light. To do this, a coherent receiver is required. This component mixes a very weak quantum signal with a stronger reference beam and extracts information from the way the two interfere.” (ScitechDaily, Physicists Turn Ordinary Glass Into a High-Speed Quantum Security Device)
"Laser-written glass chip demonstrates the potential of glass platform for quantum communication. Credit: Marco Avesani, University of Padua" (Physicists Turn Ordinary Glass Into a High-Speed Quantum Security Device)
ScitechDaily mentions the next things that support the use of glass in quantum technology.
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*Fixed and tunable beam splitters
*Thermo‑optic phase shifters for precise electrical control
*Three‑dimensional waveguide crossings
*Polarization‑independent directional couplers
These elements allow the quantum signal and reference beam to interfere in a controlled manner. So that two conjugate quadratures can be measured at once.
The device also demonstrates:
*Extremely low insertion loss (≈1 dB)
*Polarization‑independent operation
*Common‑mode rejection ratio above 73 dB, indicating strong suppression of classical noise
*High signal‑to‑noise stability over at least 8 hours of operation
*These characteristics meet or exceed those of many silicon‑based photonic receivers
*Environmental stability: Glass is inert and resistant to thermal and mechanical fluctuations.
*Low‑loss fiber coupling: Waveguides closely match the size of standard telecom fibers.
*3D design freedom: Circuits can include crossings and complex routing without added scattering.
*Scalability and cost‑effectiveness: Femtosecond laser writing enables. Rapid prototyping. Without expensive semiconductor processing steps.
(ScitechDaily, Physicists Turn Ordinary Glass Into a High-Speed Quantum Security Device)
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The microbeam that travels through ordinary glass can help to create the new optical quantum networks. The minimum scattering makes the eavesdropping almost impossible. There are two possible ways. To make this kind of network. Using normal glass plates. There is a possibility that laser beams travel in the tubes or channels. Those are in the glass plate. The system can make those laser channels by drilling them using another laser in the vacuum chamber.
That keeps those channels clean. A laser can drill those channels in the glass vertically. Or it can use two glass plates. Then the laser makes. The form of laser channels. That the photonic microchip requires. To both glasses. The system. It puts micro-optics. To the right points. Of those channels. Then the laser welds both of those glass plates together.
And then the laser beam scattering is minimum. Gas atoms and other dirt in those channels make the scattering effect. Another way is to pull the glass fiber through the glass plate horizontally. The glass can protect information that travels in the glass fiber. Or in some visions, the laser can transport information through the glass.
https://scitechdaily.com/this-microphone-made-of-glass-can-survive-extreme-heat-and-electromagnetic-chaos/
https://scitechdaily.com/physicists-turn-ordinary-glass-into-a-high-speed-quantum-security-device/










