Unique modulator could change mid-infrared photonic systems for the better

https://phys.org/news/2022-12-unique-modulator-mid-infrared-photonic.html

"MIR all-optical modulator... acetylene-filled hollow-core fiber... exploiting photo-thermal effect in acetylene-filled anti-resonant hollow-core fiber... PT effect in gas-filled HCFs exploited for ultra-sensitive gas detection... larger phase modulation and better gas sensitivity over free-space systems... AR-HCFs have broadband transmission... narrow absorption lines of gas materials, makes possible to develop ultra-broadband all-optical modulation devices from NIR to MIR"