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Low-frequency optical resonance in a multiple-wave Fabry-Perot interferometer. Gladyshev V.O.; Morozov A.N. Tech. Phys. Lett. (July 1993). v.19(7) p.449-451. // English translation of Pis`ma v Zhurnal Tekhn. Fiziki, v.19(14) p.38-42, (1993).

Discovered new fundamental phenomena in GA, including FPI, -low-frequency optical resonance (LFOR).

In-first, effect allows to increase sensitivity GA on 2-3 orders. Secondly, investigate new methods to registrations GW, which based on using the modulation of optical pumping FPI and using its tuning near by LFOR frequency.

;Received exact analytical expressions for parameters of LFOR, which for the first time allow to take additional members into account, containing first and second derived phase of electromagnetic wave in the FPI, incoming into GA.

Shown that in schemes with recycling powers is used LFOR. Also shown that under determined correlation of parameters FPI maximum of response GA on GW can overtake a maximum gravitational signal.

Fig.5.1. Laser Interferometer Space Antenna (LISA) project. The three LISA spacecraft flying in formation will act as a giant Michelson nterferometer, measuring the distortion of space caused by passing gravitational waves. Lasers in each spacecraft will be used to measure changes in the optical path lengths with a precision of 20 picometers.

Application of LFOR can increase sensibility of LISA in an order in region where GWs are expected.

Fig.5.2. Dependence of power of output optical signal WS(ν) in a region (ν0-500 , ν0+500) Hz from a GW signal frequency νGM Hz.

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