RU2539673C2 - Optical circuit of input-output device of angular velocity vector measurer based on optic fibre gyroscope - Google Patents

Abstract

FIELD: physics, optics.

SUBSTANCE: invention refers to fibre optics and can be used in engineering angular velocity vector measurers based on optic fibre gyroscopes with using single-mode optic fibres. An optical system comprises two beam-splitters 2×2 (a splitter has two inputs and two outputs) one splitter 1×2 (the splitter has one input and two outputs), three optical radiation circulators (the circulator has two inputs and one output) and three photoelectric receivers. A secondary optical radiation source is additionally provided.

EFFECT: higher reliability of the angular rate vector measurers.

3 cl, 9 dwg

Description

The invention relates to the field of fiber optics and can be used in the construction of angular velocity vector meters based on fiber-optic gyroscopes and other sensors of physical quantities using single-mode optical fibers.

To determine the location of a moving object in space, you must have current information about the magnitude of the angular velocity vector. A known angular velocity vector meter based on fiber optic gyroscopes [1]. The optical circuit of the meter contains a radiation input-output device that includes an optical radiation source, a first 2 × 2 fiber optical power divider with a division ratio of 33/67, from the first output of which 33% of the power goes to the input of a fiber ring interferometer (FRI ) the first fiber optic gyroscope. From the second output of the divider, the radiation enters the first input of a 2 × 2 fiber divider with a division ratio of optical power of 50% / 50%. From the first output of this divider, the radiation enters the input of the FRI of the second fiber-optic gyroscope. From the second output of the same divider, the radiation enters the input of the FRI of the third fiber-optic gyroscope. The second input of the first divider is connected to the first photodetector, and the second input of the second divider is connected to the second photodetector. Thus, signals from all three FRIs of fiber optic gyroscopes are present at the photodetectors. The known input-output device contains passive fiber elements in the form of fiber dividers and active components, such as a radiator and photodetectors. The reliability of passive fiber dividers and photodetectors is quite high, and the reliability of the radiation source as an active element can be significantly lower and therefore the reliability of the input-output device is almost completely determined by the reliability of the radiation source. Thus, a disadvantage of the known output input device is that when the emitter fails, the angular velocity vector meter becomes completely inoperative. It is also known an input-output device [2], which additionally contains three fiber dividers of optical power type 2 × 1 with a division ratio of 50% / 50% and connected to its first input, respectively, with the first output of the first fiber divider, the first and second outputs of the second fiber divider . The optical circuit also contains three photodetectors, which are connected respectively to the second inputs of three additional fiber dividers, and their outputs are connected to the inputs of the FRI of three fiber-optic gyroscopes. In this configuration of the input-output device, all three channels of fiber-optic gyroscopes operate independently of each other. The disadvantage of this device can also be considered that all three channels of the fiber-optic angular velocity meter have the same source of optical radiation and when it fails, the angular velocity vector meter becomes completely inoperative.

The aim of the present invention is to increase the reliability of the angular velocity vector meter based on fiber optic gyroscopes.

This goal is achieved by the fact that the circuit contains an additional optical radiation source, the outputs of the optical radiation sources are connected to the first and second inputs of the first 2 × 2 radiation divider with a power division factor of 50% / 50%, the first output of the first divider is connected to the input of a 1 × divider 2 with a division ratio at the first output 67% of the input power, and at the second output 33% of the input power, the first output of a 1 × 2 divider connected to the first input of the first optical radiation circulator, and the second input the radiator is connected to the first photodetector, while the output of the circulator is connected to the fiber ring interferometer of the first fiber-optic gyroscope, then the second output of the 1 × 2 divider is connected to the first input of the second 2 × 2 optical power divider with a power division ratio of 50% / 50%, the second input of the second divider is connected to the second output of the 1 × 2 divider, while the first output of the second 2 × 2 divider is connected to the first input of the second optical radiation circulator, and the second input of the circulator is connected to the second photodetector wherein the output of the second circulator is connected to the input of the fiber ring interferometer of the second fiber-optic gyroscope, and the second output of the second divider is connected to the first input of the third circulator of optical radiation, and the second input of the third circulator is connected to the third photodetector, while the output of the third circulator is connected to the input fiber ring interferometer of the third fiber optic gyroscope.

An optical scheme, characterized in that it does not use circulators and photodetectors attached to them, and instead of a 1 × 2 divider, a 2 × 2 divider with a division ratio of 67% / 33% is used, the first input of which is connected to the first output of the first 2 × 2 divider with a division ratio of 50% / 50%, its second input is connected to a photodetector, while its first output is connected to a ring interferometer of the first fiber-optic gyroscope, and the first and second outputs of the second 2 × 2 divider are connected to ring interferometers of the second and third fiber optical gyroscopes, respectively.

The optical circuit of the input-output device of the angular velocity vector meter based on fiber-optic gyroscopes, characterized in that the circuit contains two 1 × 2 dividers with a division ratio of 50% / 50%, four 2 × 2 dividers with a division ratio of the input power of 50% / 50% and four circulators, and the first input of the first 1 × 2 divider is connected to the output of the first optical radiation source, and the input of the second 1 × 2 divider is connected to the output of the second optical radiation source. The first output of the first 1 × 2 divider is connected to the first input of the first of four 2 × 2 dividers, and its second output is connected to the first input of the second of four 2 × 2 dividers, while the first output of the second 1 × 2 divider is connected to the first input of the third of four dividers, and its second output, with the first input of the fourth of four 2 × 2 dividers, with the first output of the first divider connected to the first input of the first circulator, the second input of the circulator connected to the first photodetector, and its output connected to the input of the fiber ring interferome unit of the first fiber-optic gyroscope, the first output of the second divider is connected to the first input of the second circulator, the second input of the circulator is connected to the second photodetector, and its output is connected to the input of the fiber ring interferometer of the second fiber-optic gyroscope, the first output of the third divider is connected to the first input of the third circulator, the second input of the circulator is connected to the third photodetector, and its output is connected to the input of the fiber ring interferometer of the third fiber-optic gyroscope, the first output of the fourth divider is connected to the input of the fourth circulator, the second input of the circulator is connected to the fourth photodetector, and its output is connected to the input of the fiber ring interferometer of the fourth fiber-optic gyroscope, while the second output of the first divider is connected to the second input of the fourth divider, the second output of the second divider connected to the second input of the third divider, the second output of the third divider is connected to the second input of the second divider, and the second output of the fourth divider is connected to the second input of the first divider.

The optical scheme, characterized in that it additionally uses a 2 × 2 divider, the first input of which is connected to the output of the first optical radiation source, and the second input is connected to the output of the second optical radiation source, while the first output of the divider is connected to the input of the first 1 × divider 2, and its second output is connected to the input of the second 1 × 2 divider.

The optical scheme, characterized in that it does not use circulators and photodetectors connected to them, while instead of the first and second 1 × 2 dividers, the first and second 2 × 2 dividers are used, the second input of the first divider and the second input of the second divider connected to the photodetectors and the first outputs of each of the four 2 × 2 dividers are connected to the inputs of four fiber ring interferometers of four fiber-optic gyroscopes, respectively.

Optical design, characterized in that instead of circulators, optical power dividers of 2 × 1 are used with a division ratio of 50% / 50%.

Improving the reliability of the angular velocity vector meter is achieved through the use of a second source of optical radiation.

The invention is illustrated by drawings. Figure 1 shows a diagram of the input-output device of the angular velocity vector meter. Figure 2 shows the optical diagram of the input-output device of a three-channel angular velocity vector meter with two radiation sources. Figure 3 shows the optical diagram of the input-output device of a three-channel angular velocity vector meter using a single photodetector. Figure 4 shows the voltage waveforms of the auxiliary phase modulation in three fiber-optic gyroscopes, providing multiple periods of detection of rotation signals. Figure 5 shows an optical diagram of an input-output device of a four-channel angular velocity vector meter. Figure 6 shows the optical diagram of the input-output device of a four-channel angular velocity vector meter with an additional 2 × 2 divider at the input of the passive part of the circuit. 7 shows an optical diagram of an input-output device of a four-channel angular velocity vector meter using two photodetectors. On Fig shows the optical diagram of the input-output device based on erbium superluminescent radiation source. Fig. 9 shows an optical diagram of an input / output device using 2 × 1 output dividers.

Figure 1 shows the optical diagram of the input-output device of the known three-channel input-output device for measuring the angular velocity vector [2]. The function of the input-output device is to separate the radiation of one source into three channels, from the output of which the radiation goes to the inputs of the interferometers of fiber-optic gyroscopes and the delivery of the returning radiation from the interferometers to photodetectors. Thus, the radiation from source 1 is fed to the input of the first 1 × 2 type 2 optical radiation divider, which has one input and two outputs (indicated by numbers 1 - input, and numbers 2, 3 - two outputs, and hereinafter, to the left of the element designations of entry numbers and to the right of the element the numbers of exits from the element, and the designations of inputs and outputs are given in smaller print numbers). The divider has a power division ratio of 33% / 67%, that is, 33% of the input power is observed at the first output, and 67% of the input power at the second output. Next, the radiation from the second output of the first 1 × 2 divider is fed to the first input of the second divider 3 also of the 1 × 2 type with a power division ratio of 50% / 50%. The radiation from the first output of the first 1 × 2 divider is fed to the first input of the third 2 × 1 divider 4, and the radiation from the first and second output of the second 1 × 2 divider is fed to the first inputs of the dividers 5, 6, respectively, which are 2 × 1 dividers . The radiation from the outputs of the third, fourth and fifth 2 × 1 dividers is fed to the inputs 7, 8, 9 of the first, second and third ring interferometers of fiber-optic gyroscopes. Returning radiation, carrying information about the angular velocity of rotation, from the first, second and third ring interferometers from the second inputs of the third, fourth and fifth dividers 2 × 1 is fed to photodetectors 10, 11, 12. Thus, the first and second dividers 1 × 2 dividing the output power of the radiation source into three equal parts, and the third, fourth and fifth 2 × 1 dividers carry out the input of radiation into the ring interferometers of a triaxial fiber-optic gyroscope and the output of the returning radiation from ring interferometers on signal photodetectors. The device described above can be called a radiation input-output device for measuring an angular velocity vector meter based on fiber-optic gyroscopes. The disadvantage of the above device is that when the radiation source fails, the entire device for measuring the angular velocity vector also fails. The radiation source, being an active element, is the least reliable element of the optical circuit of the device. All other elements of the optical scheme, being passive elements (except photodetectors), have an incomparably higher reliability.

Figure 2 presents the optical diagram of the input / output device for measuring the angular velocity vector with two radiation sources. The above scheme has higher reliability due to the use of an additional radiation source 13. The radiation sources can work both simultaneously and separately in the event of failure of one of the sources. The optical circuit contains two optical power dividers 2 × 2 (the divider has two inputs and two outputs), one 1 × 2 divider (the divider has one input and two outputs), three optical radiation circulators (the circulator has two inputs and one output) and three photodetector. The circulator works as follows; when radiation is supplied to the first input, it is practically losslessly observed at its output, and when radiation is supplied to the output of the circulator, it is observed at the output of the second input of the circulator. The outputs of the optical radiation sources are connected to the first and second input, respectively, of the first optical divider 14 of type 2 × 2 and having a power division ratio of 50% / 50% of the input power at the output channels when it is supplied to one of the two inputs of the divider. The first output of the first divider is connected to the input of the 1 × 2 type divider 15 and having a power division coefficient of the first and second output channels of 67% / 33%, respectively. The second output of the 1 × 2 divider is connected to the second input of the second divider 16, which is a 2 × 2 divider. The first input of this divider is connected to the second output of the first 2 × 2 divider. The first output of the 1 × 2 divider is connected to the first input of the circulator 17, and the second input of the circulator is connected to the photodetector 18 of the first fiber-optic gyroscope. The output of the circulator 19 is connected to a ring interferometer of the first fiber optic hygroscope. The first output of the second 2 × 2 divider is connected to the first input of the circulator 20, the second input of the circulator is connected to the photodetector 21 of the second fiber-optic gyroscope. The output of the circulator 22 is connected to a ring interferometer also a second fiber-optic gyroscope. The second output of the second 2 × 2 divider is connected to the first input of the circulator 23, the second input of the circulator is connected to the photodetector 24 of the third fiber-optic gyroscope, and the output of the circulator 25 is connected to its ring interferometer.

The power of optical radiation at the input of the FRI of the first fiber-optic gyroscope can be represented as:

$$\begin{array}{l}{P}_{\mathrm{AT}\mathrm{TO}\mathrm{AND}\mathrm{one}}=R_{\mathrm{one}}[(\mathrm{one}-{\mathrm{to}}_{\mathrm{one}}^{2\times 2}){\mathrm{to}}_2^{2\times 2}+{\mathrm{to}}_{\mathrm{one}}^{2\times 2}(\mathrm{one}-{\mathrm{to}}_2^{2\times 2})(\mathrm{one}-{\mathrm{to}}^{\mathrm{one}\times 2})]+\\ P_2[{\mathrm{to}}_{\mathrm{one}}^{2\times 2}(\mathrm{one}-{\mathrm{to}}_2^{2\times 2})+((\mathrm{one}-{\mathrm{to}}_{\mathrm{one}}^{2\times 2}){\mathrm{to}}_2^{2\times 2})(\mathrm{one}-{\mathrm{to}}^{\mathrm{one}\times 2})]\end{array}$$

where P ₁ is the output power of the first radiation source.

P ₂ is the output power of the second radiation source.

- коэффициент деления делителя 2×2 по первому выходному каналу при подаче излучения на первый или второй его вход. Например, если делитель имеет ранее упоминающийся коэффициент деления 50%/50%, то в этом случае $${к}_1^{2\times 2}=0,5$$

, Коэффициент деления этого же делителя по второму выходу составит величину $$(1-{к}_1^{2\times 2})=0,5$$

при коэффициенте деления делителя типа 1×2 67%/33% к^1×2=0,67, а по второму выходу $$(1-{к}^{1\times 2})=0,33$$

. Эти общие выражения для коэффициентов деления справедливы и для делителей типа 2×1. $$K_{\mathrm{one}}^{2\times 2}$$

- the division ratio of the 2 × 2 divider along the first output channel when applying radiation to its first or second input. For example, if the divider has the previously mentioned division ratio of 50% / 50%, then in this case $${\mathrm{to}}_{\mathrm{one}}^{2\times 2}=0,5$$

, The division coefficient of the same divider in the second output will be $$(\mathrm{one}-{\mathrm{to}}_{\mathrm{one}}^{2\times 2})=0,5$$

when the division factor of the divider is 1 × 2 67% / 33% to ^{1 × 2} = 0.67, and for the second output $$(\mathrm{one}-{\mathrm{to}}^{\mathrm{one}\times 2})=0,33$$

. These general expressions for the division coefficients are also valid for 2 × 1 divisors.

The power of optical radiation at the inputs of the interferometers of the second and third fiber-optic gyroscopes can be represented as follows:

$$\begin{array}{l}{P}_{\mathrm{AT}\mathrm{TO}\mathrm{AND}2}=R_{\mathrm{one}}[(\mathrm{one}-{\mathrm{to}}_{\mathrm{one}}^{2\times 2})(\mathrm{one}-{\mathrm{to}}_2^{2\times 2})+{\mathrm{to}}_{\mathrm{one}}^{2\times 2}{\mathrm{to}}_2^{2\times 2}(\mathrm{one}-{\mathrm{to}}^{\mathrm{one}\times 2})]+\\ P_2[{\mathrm{to}}_{\mathrm{one}}^{2\times 2}{\mathrm{to}}_2^{2\times 2}+[(\mathrm{one}-{\mathrm{to}}_{\mathrm{one}}^{2\times 2})(\mathrm{one}-{\mathrm{to}}_2^{2\times 2})(\mathrm{one}-{\mathrm{to}}^{\mathrm{one}\times 2})]]\end{array}$$

$$\begin{array}{l}{P}_{\mathrm{AT}\mathrm{TO}\mathrm{AND}3}=R_{\mathrm{one}}[(\mathrm{one}-{\mathrm{to}}_{\mathrm{one}}^{2\times 2}){\mathrm{to}}_2^{2\times 2}+{\mathrm{to}}_{\mathrm{one}}^{2\times 2}(\mathrm{one}-{\mathrm{to}}_2^{2\times 2})(\mathrm{one}-{\mathrm{to}}^{\mathrm{one}\times 2})]+\\ P_2[{\mathrm{to}}_{\mathrm{one}}^{2\times 2}(\mathrm{one}-{\mathrm{to}}_2^{2\times 2})+[(\mathrm{one}-{\mathrm{to}}_{\mathrm{one}}^{2\times 2})(\mathrm{one}-{\mathrm{to}}_2^{2\times 21})(\mathrm{one}-{\mathrm{to}}^{\mathrm{one}\times 2})]]\end{array}$$

, $${к}_2^{2\times 2}=0,5$$

и к^1×2=0,67 на входы кольцевых интерферометров всех трех волоконно-оптических гироскопов поступает оптическое излучение одинаковой мощности независимо от соотношения величин мощности обоих источников, то есть на каждый вход ВКИ поступает 0,333×[P₁+P₂].Thus, when $${\mathrm{to}}_{\mathrm{one}}^{2\times 2}=0,5$$

, $${\mathrm{to}}_2^{2\times 2}=0,5$$

and to ^{1 × 2} = 0.67, the inputs of ring interferometers of all three fiber-optic gyroscopes receive optical radiation of the same power regardless of the ratio of the power values of both sources, that is, 0.333 × [P ₁ + P ₂ ] is supplied to each input of the FRI.

. Второй вход этого делителя соединен с фотоприемником 30, который является общим для всех трех волоконно-оптических гироскопов. В этом случае первый выход третьего делителя 2×2 соединен с входом 27 первого ВКИ первого волоконно-оптического гироскопа. Первый и второй выходы второго делителя 2×2 соединены с входами ВКИ 28, 29 второго и третьего волоконно-оптических гироскопов соответственно. На фотоприемнике присутствуют сигналы со всех трех гироскопов одновременно. Для исключения влияния каналов друг на друга при измерении проекций вектора угловой скорости используется напряжение вспомогательной фазовой модуляции, показанное на Фиг.4. Напряжение 31 используется в первом гироскопе, напряжение 32 используется во втором гироскопе, а напряжение 33 используется в третьем гироскопе. Напряжение вспомогательной модуляции представляет собой пилообразные ступенчатые импульсы с длительностью каждой ступеньки, равной времени пробега оптических лучей по световоду чувствительной катушки и величиной напряжения каждой ступеньки, при подаче которого на фазовый модулятор фаза лучей ВКИ изменяется на π/2 радиан. При параметрах напряжения вспомогательной фазовой модуляции сигналы вращения гироскопов имеют кратные частоты и при соответствующих методах детектирования влияние гироскопических каналов, измеряющих разные проекции вектора угловой скорости друг на друга, практически полностью может быть исключено.Figure 3 shows the optical diagram of the input-output device of a three-channel angular velocity vector meter using a single photodetector and without the use of circulators. In this scheme, instead of the 1 × 2 divider (FIG. 2), a third 2 × 2 type divider 26 is used with a division ratio of 67% / 33% $$({\mathrm{to}}_3^{2\times 2}=0,67)$$

. The second input of this divider is connected to a photodetector 30, which is common to all three fiber-optic gyroscopes. In this case, the first output of the third 2 × 2 divider is connected to the input 27 of the first FRI of the first fiber-optic gyroscope. The first and second outputs of the second 2 × 2 divider are connected to the inputs of the FRI 28, 29 of the second and third fiber-optic gyroscopes, respectively. The photodetector contains signals from all three gyroscopes at the same time. To exclude the influence of channels on each other when measuring projections of the angular velocity vector, the auxiliary phase modulation voltage shown in Fig. 4 is used. Voltage 31 is used in the first gyroscope, voltage 32 is used in the second gyroscope, and voltage 33 is used in the third gyroscope. The auxiliary modulation voltage is sawtooth step pulses with a duration of each step equal to the travel time of the optical beams along the fiber of the sensing coil and the voltage of each step, when applied to the phase modulator, the phase of the FRI beams changes to π / 2 radians. With voltage parameters of auxiliary phase modulation, gyroscope rotation signals have multiple frequencies and, with appropriate detection methods, the influence of gyroscopic channels measuring different projections of the angular velocity vector on top of each other can be almost completely eliminated.

5 is an optical diagram of an input / output device of a four-channel angular velocity vector meter. This device can ensure the operability of the meter even in the event that any of its components fails. This applies to all optical components included in this device. Thus, the reliability of the angular velocity vector meter is further enhanced. The four-channel input-output device, in addition to two independent sources, contains the first 34 and second 35 optical dividers of type 1 × 2, a block of four dividers 36, 37, 38, 39 of type 2 × 2, four circulators 40, 41, 42, 43 and four photodetectors 44, 45, 46, 47 of four fiber optic gyroscopes. The outputs of the circulators are connected to the inputs 48, 49, 50, 51 of the FRI of four gyroscopes. All dividers have a division ratio of 50% / 50%. The input of the first 1 × 2 divider is connected to the output of the first radiation source, and the input of the second 1 × 2 divider is connected to the output of the second radiation source. The first output of the first 1 × 2 divider is connected to the first input of the first 2 × 2 divider, the second output of the first 1 × 2 divider is connected to the first input of the second 2 × 2 divider. The first output of the second 1 × 2 divider is connected to the first input of the third 2 × 2 divider, and the second output of the second 1 × 2 divider is connected to the first input of the fourth 2 × 2 divider. The second output of the first 2 × 2 divider is connected to the second input of the fourth divider, and the second output of the fourth divider is connected to the second input of the first 2 × 2 divider. The second output of the second 2 × 2 divider is connected to the second input of the third divider, and the second output of the third divider is connected to the second input of the second 2 × 2 divider. The first output of the first 2 × 2 divider is connected to the first input of the first circulator, the second input of which is connected to the photodetector of the first fiber-optic gyroscope, and the output of the circulator is connected to the input 48 of the FRI of the first fiber-optic gyroscope. The first output of the second 2 × 2 divider is connected to the first input of the second circulator, the second input of which is connected to the photodetector of the second fiber-optic gyroscope, and the output of the circulator is connected to the input 49 of the FRI of the second fiber-optic gyroscope. The first output of the third 2 × 2 divider is connected to the first input of the third circulator, the second input of which is connected to the photodetector of the third fiber-optic gyroscope, and the output of the circulator is connected to the input 50 of the FRI of the third fiber-optic gyroscope. The first output of the fourth 2 × 2 divider is connected to the first input of the fourth circulator, the second input of which is connected to the photodetector of the fourth fiber-optic gyroscope, and the output of the circulator is connected to the input 51 of the FRI of the fourth fiber-optic gyroscope. The optical radiation power at the outputs of a four-channel input-output device can be represented as follows:

$$R_{\mathrm{AT}R\mathrm{AND}\mathrm{one}}^{48}=0,5[{\mathrm{<figure-callout\; id="36"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{36}^{\mathrm{one}}+{\mathrm{<figure-callout\; id="36"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{36}^2{\mathrm{<figure-callout\; id="39"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{39}^{\mathrm{one}}{\mathrm{<figure-callout\; id="36"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{36}^2+...]P_{\mathrm{one}}+0,5[{\mathrm{<figure-callout\; id="39"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{39}^2{\mathrm{<figure-callout\; id="36"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{36}^2+{\mathrm{<figure-callout\; id="39"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{39}^2{\mathrm{<figure-callout\; id="36"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{36}^{\mathrm{one}}{\mathrm{<figure-callout\; id="39"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{39}^{\mathrm{one}}{\mathrm{<figure-callout\; id="36"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{36}^2+...]{\mathrm{<figure-callout\; id="2"\; label="P"\; filenames="00000031.png,00000032.png"\; state="\{\{state\}\}">P</figure-callout>}}_2$$

$$R_{\mathrm{AT}R\mathrm{AND}2}^{49}=0,5[{\mathrm{<figure-callout\; id="37"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{37}^{\mathrm{one}}+{\mathrm{<figure-callout\; id="37"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{37}^2{\mathrm{<figure-callout\; id="38"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{38}^{\mathrm{one}}{\mathrm{<figure-callout\; id="37"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{37}^2+...]P_{\mathrm{one}}+0,5[{\mathrm{<figure-callout\; id="38"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{38}^2{\mathrm{<figure-callout\; id="37"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{37}^2+{\mathrm{<figure-callout\; id="38"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{38}^2{\mathrm{<figure-callout\; id="37"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{37}^{\mathrm{one}}{\mathrm{<figure-callout\; id="38"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{38}^{\mathrm{one}}{\mathrm{<figure-callout\; id="37"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{37}^2+...]{\mathrm{<figure-callout\; id="2"\; label="P"\; filenames="00000031.png,00000032.png"\; state="\{\{state\}\}">P</figure-callout>}}_2$$

$$R_{\mathrm{AT}R\mathrm{AND}3}^{\mathrm{fifty}}=0,5[{\mathrm{<figure-callout\; id="38"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{38}^{\mathrm{one}}+{\mathrm{<figure-callout\; id="38"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{38}^2{\mathrm{<figure-callout\; id="37"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{37}^{\mathrm{one}}{\mathrm{<figure-callout\; id="7"\; label="K"\; filenames="00000031.png"\; state="\{\{state\}\}">K</figure-callout>}}_7^2+...]{\mathrm{<figure-callout\; id="2"\; label="P"\; filenames="00000031.png,00000032.png"\; state="\{\{state\}\}">P</figure-callout>}}_2+0,5[{\mathrm{<figure-callout\; id="37"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{37}^2{\mathrm{<figure-callout\; id="38"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{38}^2+{\mathrm{<figure-callout\; id="37"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{37}^2{\mathrm{<figure-callout\; id="38"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{38}^{\mathrm{one}}{\mathrm{<figure-callout\; id="37"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{37}^{\mathrm{one}}{\mathrm{<figure-callout\; id="38"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{38}^2+...]P_{\mathrm{one}}$$

$$R_{\mathrm{AT}R\mathrm{AND}\mathrm{four}}^{51}=0,5[{\mathrm{<figure-callout\; id="39"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{39}^{\mathrm{one}}+{\mathrm{<figure-callout\; id="39"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{39}^2{\mathrm{<figure-callout\; id="36"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{36}^{\mathrm{one}}{\mathrm{<figure-callout\; id="39"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{39}^2+...]{\mathrm{<figure-callout\; id="2"\; label="P"\; filenames="00000031.png,00000032.png"\; state="\{\{state\}\}">P</figure-callout>}}_2+0,5[{\mathrm{<figure-callout\; id="36"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{36}^2{\mathrm{<figure-callout\; id="39"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{39}^2+{\mathrm{<figure-callout\; id="36"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{36}^2{\mathrm{<figure-callout\; id="39"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{39}^{\mathrm{one}}{\mathrm{<figure-callout\; id="36"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{36}^{\mathrm{one}}{\mathrm{<figure-callout\; id="39"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{39}^2+...]P_{\mathrm{one}}$$

, $$K_{37}^1$$

, $$K_{38}^1$$

, $$K_{39}^1$$

- коэффициенты деления делителей 2×2 в прямых каналах;Where $${\mathrm{<figure-callout\; id="36"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{36}^{\mathrm{one}}$$

, $${\mathrm{<figure-callout\; id="37"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{37}^{\mathrm{one}}$$

, $${\mathrm{<figure-callout\; id="38"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{38}^{\mathrm{one}}$$

, $${\mathrm{<figure-callout\; id="39"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{39}^{\mathrm{one}}$$

- division factors of 2 × 2 dividers in direct channels;

, $$K_{37}^2$$

, $$K_{38}^2$$

, $$K_{39}^2$$

- коэффициенты деления делителей 2×2 в перекрестных каналах, при этом, как и ранее, $$K_{36}^2=(1-K_{36}^1)$$

, $$K_{37}^2=(1-K_{37}^1)$$

, $$K_{38}^2=(1-K_{38}^1)$$

, $$K_{39}^2=(1-K_{39}^1)$$

. $${\mathrm{<figure-callout\; id="36"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{36}^2$$

, $${\mathrm{<figure-callout\; id="37"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{37}^2$$

, $${\mathrm{<figure-callout\; id="38"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{38}^2$$

, $${\mathrm{<figure-callout\; id="39"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{39}^2$$

- division factors of 2 × 2 dividers in the cross channels, while, as before, $${\mathrm{<figure-callout\; id="36"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{36}^2=(\mathrm{one}-{\mathrm{<figure-callout\; id="36"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{36}^{\mathrm{one}})$$

, $${\mathrm{<figure-callout\; id="37"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{37}^2=(\mathrm{one}-{\mathrm{<figure-callout\; id="37"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{37}^{\mathrm{one}})$$

, $${\mathrm{<figure-callout\; id="38"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{38}^2=(\mathrm{one}-{\mathrm{<figure-callout\; id="38"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{38}^{\mathrm{one}})$$

, $${\mathrm{<figure-callout\; id="39"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{39}^2=(\mathrm{one}-{\mathrm{<figure-callout\; id="39"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{39}^{\mathrm{one}})$$

.

From the above relations for the output power at the output of the input-output device, it follows that with the simultaneous operation of the optical radiation sources through all four channels, the optical power is the same. The advantage of this circuit of an input-output device is that even in the event of failure of any element of the circuit, the optical power is at least stored at its three outputs. This allows you to maintain the health of the entire device for measuring the angular velocity vector, despite the uneven distribution of power over the channels. In this case, it is necessary to achieve the identity of the rotation signals along the working channels by adjusting the gain of the corresponding electronic paths.

Figure 6 presents the optical diagram of a four-channel input-output device with an additional divider 52. The first input of the additional 2 × 2 divider is connected to the output of the first optical radiation source, and its second input is connected to the output of the second optical radiation source. The first output of the additional divider is connected to the input of the first 1 × 2 divider, and its second output is connected to the input of the second 1 × 2 divider. In this case, the optical power at the outputs 53, 54, 55, 56 can be represented as:

$$R_{\mathrm{AT}R\mathrm{AND}\mathrm{one}}^{53}=0,5(P_{\mathrm{one}}+P_2)[({\mathrm{<figure-callout\; id="36"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{36}^{\mathrm{one}}+{\mathrm{<figure-callout\; id="36"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{36}^2{\mathrm{<figure-callout\; id="39"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{39}^{\mathrm{one}}{\mathrm{<figure-callout\; id="36"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{36}^2+...)+({\mathrm{<figure-callout\; id="39"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{39}^2{\mathrm{<figure-callout\; id="36"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{36}^2+{\mathrm{<figure-callout\; id="39"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{39}^2{\mathrm{<figure-callout\; id="36"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{36}^{\mathrm{one}}{\mathrm{<figure-callout\; id="39"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{39}^{\mathrm{one}}{\mathrm{<figure-callout\; id="36"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{36}^2+...)]$$

$$R_{\mathrm{AT}R\mathrm{AND}2}^{54}=0,5(P_{\mathrm{one}}+P_2)[({\mathrm{<figure-callout\; id="37"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{37}^{\mathrm{one}}+{\mathrm{<figure-callout\; id="37"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{37}^2{\mathrm{<figure-callout\; id="38"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{38}^{\mathrm{one}}{\mathrm{<figure-callout\; id="37"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{37}^2+...)+({\mathrm{<figure-callout\; id="38"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{38}^2{\mathrm{<figure-callout\; id="37"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{37}^2+{\mathrm{<figure-callout\; id="38"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{38}^2{\mathrm{<figure-callout\; id="37"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{37}^{\mathrm{one}}{\mathrm{<figure-callout\; id="38"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{38}^{\mathrm{one}}{\mathrm{<figure-callout\; id="37"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{37}^2+...)]$$

$$R_{\mathrm{AT}R\mathrm{AND}3}^{55}=0,5(P_{\mathrm{one}}+P_2)[({\mathrm{<figure-callout\; id="38"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{38}^{\mathrm{one}}+{\mathrm{<figure-callout\; id="38"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{38}^2{\mathrm{<figure-callout\; id="37"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{37}^{\mathrm{one}}{\mathrm{<figure-callout\; id="7"\; label="K"\; filenames="00000031.png"\; state="\{\{state\}\}">K</figure-callout>}}_7^2+...)+({\mathrm{<figure-callout\; id="37"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{37}^2{\mathrm{<figure-callout\; id="38"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{38}^2+{\mathrm{<figure-callout\; id="37"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{37}^2{\mathrm{<figure-callout\; id="38"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{38}^{\mathrm{one}}{\mathrm{<figure-callout\; id="37"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{37}^{\mathrm{one}}{\mathrm{<figure-callout\; id="38"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{38}^2+...)]$$

$$R_{\mathrm{AT}R\mathrm{AND}\mathrm{four}}^{56}=0,5(P_{\mathrm{one}}+P_2)[({\mathrm{<figure-callout\; id="39"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{39}^{\mathrm{one}}+{\mathrm{<figure-callout\; id="39"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{39}^2{\mathrm{<figure-callout\; id="36"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{36}^{\mathrm{one}}{\mathrm{<figure-callout\; id="39"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{39}^2+...)+({\mathrm{<figure-callout\; id="36"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{36}^2{\mathrm{<figure-callout\; id="39"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{39}^2+{\mathrm{<figure-callout\; id="36"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{36}^2{\mathrm{<figure-callout\; id="39"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{39}^{\mathrm{one}}{\mathrm{<figure-callout\; id="36"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{36}^{\mathrm{one}}{\mathrm{<figure-callout\; id="39"\; label="K"\; filenames="00000034.png,00000035.png"\; state="\{\{state\}\}">K</figure-callout>}}_{39}^2+...)]$$

In this scheme, if one of the optical radiation sources fails, the distribution of optical power across the channels of the input-output device is uniform.

Figure 7 presents an optical diagram of a four-channel input-output device using two photodetectors. In this scheme, instead of the first and second 1 × 2 dividers, the first and second 2 × 2 dividers 57, 58 are used. The first input of the first 2 × 2 divider is connected to the output of the first optical radiation source, and its second input is connected to the photodetector 59. The first input of the second 2 × 2 divider is connected to the output of the second optical radiation source, its second input is connected to the photodetector 60. The first and second the outputs of the first 2 × 2 divider are connected respectively to the first input of two of the four 2 × 2 dividers, the first and second outputs of the second 2 × 2 divider are connected, respectively, to the first input of the remaining two of the four dividers, respectively. The first outputs of all four dividers 61, 62, 63, 64 are connected to the inputs of the FRI of four fiber-optic gyroscopes, respectively. The outputs of the photodetectors can be combined, and the total signal is further processed. Here, the frequency principle of separating rotation signals from four fiber-optic gyroscopes, which was mentioned earlier, can also be used.

On Fig shows the optical diagram of the input-output device based on erbium fiber superluminescent source (EMCI) of optical radiation. Pumping radiation with a certain wavelength, for example, at a wavelength of 980 nm, is introduced into a segment of a fiber with an activated light guide core 65 from two opposite sides through multiplexers 66, 67 using diodes 68, 69. Radiation at a radiation wavelength of 1550 nm through segments of single-mode optical fibers 70, 71 is supplied respectively to the first and second inputs of the 2 × 2 divider. In this version of the optical EMC scheme, it is possible to dispense with the use of optical radiation isolators at its two outputs, which protect the activated fiber from the effects of back-reflected radiation. The role of insulators in this case is played by circulators, since they are actually insulators of radiation propagating from the first output of the insulator to its first input. The given EVSI scheme thus has common optical components with fiber-optic gyroscopes, which allows reducing the dimensions and weight of the entire angular velocity vector meter as a whole.

In small-sized devices for measuring the angular velocity vector, the use of optical radiation circulators can cause a zero bias of fiber-optic gyroscopes due to their close proximity to their sensitive coils. The fact is that the circulators include Faraday rotators, which are based on magnets. It is known that a magnetic field can cause a zero bias of a fiber optic gyroscope. Therefore, where necessary, instead of circulators, dividers 72, 73, 74 (Fig. 9) of the 2 × 1 type, which can be alloy fiber splitters, can be used. The second inputs of these dividers are connected to photodetectors 75, 76, 77, and the outputs are connected to the inputs 78, 79, 80 of the FRI fiber optic gyroscopes of the angular velocity vector meter.

Literature

[1] A.M. Kurbatov "Device for measuring the full vector of the angular velocity of a moving object." RF patent No. 217252, application No. 96108107, priority of the invention on April 18, 1996, registered on August 10, 1998.

[2] Korkishko Yu.N. et al. “Three-axis fiber-optic gyroscope for space rocket applications” XIII St. Petersburg International Conference on Integrated Navigation Systems. May 29-31, 2006, pp. 211-218.

Claims (3)

1. The optical circuit of the input-output device of the angular velocity vector meter based on a fiber-optic gyroscope, containing a source of optical radiation, photodetectors, optical power dividers connected to ring interferometers of fiber-optic gyroscopes, characterized in that the circuit contains an additional source of optical radiation , the outputs of the optical radiation sources are connected to the first and second inputs of the first radiation divider 2 × 2 with a power factor of 50% / 50%, the first output of the first divider is connected to the input of the 1 × 2 divider with a division coefficient for the first output of 67% of the input power, and for the second output is 33% of the input power, the first output of the 1 × 2 divider is connected to the first input of the first optical radiation circulator, and the second input of the circulator is connected to the first photodetector, while the output of the circulator is connected to the ring interferometer of the first fiber-optic gyroscope, then the second output of the 1 × 2 divider is connected to the first input of the second 2 × 2 optical power divider with coefficient a 50% / 50% power dividing factor, the second input of the second divider being connected to the second output of the 1 × 2 divider, the first output of the second 2 × 2 divider being connected to the first input of the second optical radiation circulator, and the second input of the circulator connected to the second photodetector, the output of the second circulator is connected to the input of the ring interferometer of the second fiber-optic gyroscope, and the second output of the second divider is connected to the first input of the third circulator of optical radiation, and the second input of the third circulator is connected nen with the third photodetector, while the output of the third circulator is connected to the input of the ring interferometer of the third fiber-optic gyroscope. 2. The optical circuit of the input-output device of the angular velocity vector meter based on fiber-optic gyroscopes, characterized in that the circuit contains two 1 × 2 dividers with a division ratio of 50% / 50%, four 2 × 2 dividers with a division ratio of input power 50 % / 50% and four circulators, and the first input of the first 1 × 2 divider is connected to the output of the first optical radiation source, and the input of the second 1 × 2 divider is connected to the output of the second optical radiation source, then the first output of the first 1 × 2 divider is connected to the first entrance the first of four 2 × 2 dividers, and its second output is connected to the first input of the second of four 2 × 2 dividers, while the first output of the second 1 × 2 divider is connected to the first input of the third of four dividers, and its second output to the first input of the fourth of the four 2 × 2 dividers, the first output of the first divider connected to the first input of the first circulator, the second input of the circulator connected to the first photodetector, and its output connected to the input of the ring interferometer of the first fiber-optic gyroscope, the first output of the second The device is connected to the first input of the second circulator, the second input of the circulator is connected to the second photodetector, and its output is connected to the input of the ring interferometer of the second fiber-optic gyroscope, the first output of the third divider is connected to the first input of the third circulator, the second input of the circulator is connected to the third photodetector, and its output is connected to the input of the ring interferometer of the third fiber-optic gyroscope, the first output of the fourth divider is connected to the input of the fourth circulator, the second input to the compass a junction box is connected to the fourth photodetector, and its output is connected to the input of the ring interferometer of the fourth fiber-optic gyroscope, while the second output of the first divider is connected to the second input of the fourth divider, the second output of the second divider is connected to the second input of the third divider, the second output of the third divider is connected to the second input of the second divider, and the second output of the fourth divider is connected to the second input of the first divider. 3. The optical circuit according to claim 2, characterized in that it additionally uses a 2 × 2 divider, the first input of which is connected to the output of the first optical radiation source, and the second input is connected to the output of the second optical radiation source, while the first output of the divider is connected with the input of the first 1 × 2 divider, and its second output is connected to the input of the second 1 × 2 divider.

Images