PHOTOELECTRIC FIBRE-OPTIC MICROWAVE MODULE Russian patent published in 2024 - IPC H01L31/232 

FIELD: radio engineering.

SUBSTANCE: invention relates to radio engineering, namely to radio photonics. Photoelectric fibre-optic microwave module includes a microwave photodetector and a multimode optical fibre optically connected to the microwave photodetector, between the optical fibre core and the microwave photodetector there is an optical element made in the form of a truncated cone coaxial with the optical fibre core. Larger base of the truncated cone is monolithically connected to the end face of the core of the optical fibre and has a diameter equal to the diameter d₀ of the core of the optical fibre. Height h of the truncated cone is set in the range equal to (0.1-1.0)⋅d₀/NA. Angle β inclination of generatrices of the conical surface of the truncated cone is set by the ratio sin β=(0.2-1.0)⋅NA. Smaller base of truncated cone is optically connected to photodetector by immersion with optical density exceeding optical density of optical fibre core. Achieved photoresponse times of the microwave module have been reduced by 3-4 times and are equal to 120-160 ps in the microwave module.

EFFECT: faster operation of a powerful microwave module.

1 cl, 4 dwg