OPTICAL CORRELATION REFLECTOMETER Russian patent published in 2021 - IPC G01M11/02 

FIELD: optical measurements.

SUBSTANCE: invention relates to the field of optical measurements, in particular to optical-electronic devices for measuring and monitoring the parameters of optical fibers. The claimed optical correlation reflectometer contains a clock generator, a source of optical radiation, optically connected through a directional coupler with the input end of the optical fiber under study and with the first input of the photodetector, the output of which is connected to the input of an analog-to-digital converter, a correlator, output connected to the input of the indicator. In addition, a generator of continuous M-sequence of pulses, a frequency divider, a ring memory register, a switch and a one-shot are introduced, while the output of the clock generator is connected to the inputs of the generator of a continuous M-sequence of pulses, a frequency divider, a control input of the ring memory register, the input of which is connected to the output of the analog-to-digital converter, and the output is with the second input of the correlator, the output of the frequency divider is connected to the input of the one-shot, the output of which is connected to the first input of the switch and the second input of the photodetector, the second input of the switch is connected to the output of the generator of continuous M-sequence of pulses and the first input of the correlator, and the output of the switch is connected to the input of the optical radiation source.

EFFECT: reduction of the volume and time of correlator computations and, consequently, the time of registration of the reflectogram.

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