Fiber-Optical System for Measuring the Temperature of the KAI-1 Cubesat

The paper presents a description of one of the payloads of a small-sized spacecraft (cubesat nanosatellite, size 3U) - a fiber-optic temperature meter based on Bragg gratings. The above review of implemented similar projects on the introduction of Bragg sensors for monitoring the state of individual loaded elements of spacecraft in the United States and the European Union shows the promise of this area of research. The meter is based on a traditional circuit that converts the wavelength shift of the Bragg grating of the sensor into a change in the amplitude of the reflected signal. A description of the block diagram, its key components, as well as the results of calibration and testing of the meter in space is given. Based on the preliminary results, the topics of future missions implemented within the framework of the Planet Duty Program of the Innovation Assistance Fund were formulated.