Fiber-optic sensor is designed to remote the control of combustion parameters in the combustor of engines during working. No disassembly is needed for internal control of engine combustor. The control during an engine working includes important engine’s combustor parameters such as pressure and temperature. These values indicate the engine performance. Working conditions of a sensor registering these parameters are heavy-duty, namely: temperatures up to 700 ºC, pressures up to 60 kg/cm2, frequencies until 25 kHz, strong electromagnetic and vibration environment. Service life of common used tensometric sensors is rather short. The remote fiber-optic sensor was realized and tested. The elaborated sensor satisfies all pointed conditions, which can function for a long time at temperatures exceeding 400 ºC and pressure up to 20 MPa due to its construction and characteristic features. The principle of the pressure sensor performance is the effect of laser light modulation due to mechanical bending of optical fiber under the saw-tooth diaphragm displacement. High sensitivity to displacement (up to 0.4 nm) is combined with a strong immunity against electromagnetic field and vibrations. This fact allows the detection of small displacements of diaphragm, and hence the use of thicker so robust diaphragms. The sensor can work more time in aggressive gases at high temperatures and pressure. Optical fibers are coupled with optical signal receptor amplifier modulus, which allows the remote monitoring of combustor pressure.