The Higher Attestation Commission announced on 13 October 2026 the PhD defence of Abdullajon Komilov, whose thesis is an optoelectronic device for monitoring geothermal gases based on indium arsenide (InAs) light-emitting diodes. The research was done at Fergana State Technical University under Obbozjon Qo‘ldashov, Doctor of Technical Sciences and professor. Mr. Komilov will defend it in semiconductor physics (technical sciences) before the dissertation council at Namangan State Technical University.
The device pairs a two-wavelength infrared InAs diode with a photodiode and runs on its own autonomous power supply. A reference channel at 3.20 µm and a measuring channel at 3.39 µm pick out methane and other hydrocarbon gases. The ratio of the two signals compensates for an unstable light source, optical losses and the surroundings. The thesis also models how well the diode and photodiode spectra match in the 3.0–3.6 µm range, and the energy balance of an energy-saving pulsed mode.
The device has made it possible to prevent a dangerous build-up of flammable geothermal gases at a geothermal energy facility. Uzbekistan’s Intellectual Property Agency granted a utility-model patent for its autonomous power source (FAP 2022 0271) on 19 February 2025. The diode design, in one housing with a parabolic reflector and a thermoelectric cooler, is used by FOTON JSC to keep its semiconductor devices stable.
Why it matters
Methane and other flammable gases can come up with geothermal water and steam. A low-power gas sensor developed in Uzbekistan could help make future geothermal wells and plants in the country safer.
