RU2420780C1 - Optical non-majority device - Google Patents

Abstract

FIELD: physics. ^ SUBSTANCE: device has first and second optical nonofibres, an output optican nanofibre, an optical nanofibre N-input coupler, two constant optical signal sources and two extensible nanotubes. Outputs of the first and second sources are connected to inputs of the first and second optical fibres, respectively. The output of the first nanofibre is optically connected to the input of the output nanofibre. The extensible nanotubes lie between the output of the coupler and the output of the second nanofibre on the propagation axis of their output optical signals such that in the outermost left-sided position, the inner nanotube breaks the optical connection between the output of the first nanofibre and the input of the output fibre. ^ EFFECT: transmission of a signal to the output of the device, where said signal is at most of the inputs of the device, with high speed which is potentially achievable for pure optical information processing devices, simplification of the device and its nanoscale design. ^ 1 dwg

Description

The invention relates to computer aids and can be used in optical information processing devices in the development and creation of optical computers and transceivers.

Various major elements are known based on the use of electronic functional elements [Bogolyubov I.N., Ovsievich B.L., Rosenblum L.Ya. Synthesis of schemes from threshold and majority elements. - Information transmission networks and their automation, M .: Nauka, 1965].

The disadvantage of these majority elements is the low speed and the inability to use optical signals.

The closest in technical execution to the proposed device is an optical adder modulo two, containing waveguide elements [Akaev A.A., Mayorov S.A. Optical methods of information processing. - M .: Higher. Shk., 1988 .-- 237 s: ill. p.202].

The disadvantages of this optical adder modulo two are the inability to perform the majorization function, its complexity and the impossibility of nanoscale execution.

The claimed invention is aimed at solving the problem of transmitting to the device output a signal located at most of its inputs with a speed potentially achievable for purely optical information processing devices, the task of simplifying the device, and the task of implementing the device in nanoscale design.

The tasks set arise in the development and creation of optical computing nanomachines or transceiver nanodevices that provide information processing in the tera and gigahertz ranges.

The claimed device is built on the basis of optical nanofibers, technical options for which are described [Optics of nanostructures / Edited by A.V. Fedorova. - SPb .: Nedra, 2005; Krenn J.R., Dereux A., Weeber J.C. et al. Squeezing the optical near-field zone by plasmon coupling of metal nanoparticles. Physical Review Letters, 1999, 82, 12, 2590], and telescopic nanotubes, which refers to a pair of nanotubes embedded in each other [Multiwalled Carbon Nanotubes as Gigahertz Oscillators / Quanshui Zheng, Qing Jiang // Phys. Rev. Lett. 88, 045503, 28 January, 2002].

The invention consists in that the device comprises a first optical nanofiber, a second optical nanofiber, an output optical nanofiber, an optical nanofiber N-input combiner, two sources of constant optical signal, two telescopic nanotubes, the information inputs of the device being the inputs of an optical nanofiber N-input combiner , the output of the second source of constant optical signal is connected to the input of the second optical nanofiber, the output of the first source is standing optical signal is connected to the input of the first optical nanofiber, the output of the first optical nanofiber is optically connected to the input of the output optical nanofiber, telescopic nanotubes are located between the output of the optical nanofiber N-input combiner and the output of the second optical nanofiber along the propagation axis of their output optical signals, the output of the device is the output output optical nanofiber.

The drawing shows a functional diagram of an optical majority device.

The device consists of a first optical nanofiber 1 ₁ , a second optical nanofiber 1 ₂ , an output optical nanofiber 1 ₃ , an optical nanofiber N-input combiner 2, two sources of constant optical signal 3 _i , _{i = 1,2} , two telescopic nanotubes 4 _i , _{i = 1.2} (4 ₁ is the inner nanotube, 4 ₂ is the outer nanotube).

The information inputs of the device X ₁ X ₂ , ... X _N are the inputs of the optical nanofiber N - input combiner 2. The output of the device Y is the output of the output optical nanofiber 1 ₃ .

The output of the second source of constant optical signal 3 _{2 is} connected to the input of the second optical nanofiber l ₂ . The output of the first source of constant optical signal 3 _{1 is} connected to the input of the first optical nanofiber 1 ₁ , the output of the first optical nanofiber 1 _{1 is} optically connected to the input of the output optical nanofiber 1 ₃ .

Telescopic nanotubes 4 _1, 4 ₂ are located between the output of the optical nanofiber N-input combiner 2 and the output of the second optical nanofiber 1 ₂ along the propagation axis of their output optical signals. Under the influence of the pressure difference of the light fluxes (the optical power difference of 1-5 watts creates a pressure difference of 5-15 nN), the inner nanotube 4 ₁ will move towards the optical stream with a lower intensity (it must be borne in mind that the minimum necessary pressure to move nanotubes are attonewtons [Multiwalled Carbon Nanotubes as Gigahertz Oscillators / Quanshui Zheng, Qing Jiang // Phys. Rev. Lett. 88, 045503, January 28, 2002]).

In the extreme left (initial) position, the inner nanotube 4 ₁ breaks the optical connection between the output of the first optical nanofiber 1 ₁ and the input of the output optical nanofiber 1 ₃ .

The device operates as follows.

From the output of the second source of constant optical signal 3 ₂ signal with intensity I ₀ = (M-0.5) srvc. units (M is the number of inputs on which the same signal must be for supplying an optical signal 1 conventional unit to the output of the device) is supplied to the input of the second optical nanofiber 1 ₂ .

Before the optical signals X _1, X ₂ , ... X _{N are} fed to the inputs _{, the} device is in its initial (initial) state - the inner nanotube 4 ₁ is in the leftmost (initial) position, which is provided by the optical signal of the second optical nanofiber 1 ₂ .

In the extreme left position, the inner nanotube 4 ₁ breaks the optical connection between the output of the first optical nanofiber 1 ₁ and the input of the output optical nanofiber 1 ₃ .

If the N inputs of the device filed M signals with an intensity of 1 srvc. units, and the remaining inputs are fed K signals with an intensity of 0 srvc. units, then the signal intensity at the output of the optical nanofiber N-input combiner 2 will be equal to I ₁ = M srvc. units

The difference in light pressures will act on the inner nanotube 4 ₁ : a pressure proportional to the intensity of the light flux at the output of the optical nanofiber N - input combiner 2 - F = Z · I ₁ (Z is the proportionality coefficient), and a pressure proportional to the intensity of the light flux I ₀ the output of the second optical nanofiber 1 ₂ .

At the end of the transition process, under the influence of the difference of light pressures, the inner nanotube 4 ₁ from the leftmost position will move to the rightmost position. The transition time is determined by the mass of the inner nanotube 4 ₁ (≈10 ^-15 -10 ^-16 g), the friction force during its movement (≈10 ^-9 n), the intensity of the constant optical signal source 3 ₂ , the intensity I _{1 of the} input optical signal and is ≈10 ^-9 -10 ^-1O c).

The shift of the inner nanotube 4 ₁ to the right will lead to the formation of a connection between the output of the first optical nanofiber 1 ₁ and the input of the output optical nanofiber 1 ₃ . Since the intensity of the first source of constant optical signal 3 ₁ is equal to 1 srvc. units, then the optical signal at the output of the output optical nanofiber 1 ₃ will be equal to 1 srvc. units

Now let M-1 (or less) signals with an intensity of 1 conv. units The signal intensity at the output of the optical nanofiber N-input combiner 2 will be equal to I ₂ = M-1 (or less) srvc. units, which is less than the intensity of the source of constant optical signal I ₀ .

Under the influence of the difference of light pressures, the inner nanotube 4 _{1 will} move to the leftmost position.

In the extreme left position, the inner nanotube 4 ₁ breaks the optical connection between the output of the first optical nanofiber 1 ₁ and the input of the output optical nanofiber 1 ₃ . The optical signal at the output of the output optical nanofiber 1 ₃ will be equal to 0 srvc. units

Thus, if there are optical signals with an intensity of 0 srvc on the M inputs of the device units, an optical signal 0 conv. units, and if there are signals on the M inputs of the device with an intensity of 1 srvc. units, an optical signal 1 srvc will appear at the output of the device units, which ensures the implementation of the majorization function.

The simplicity of this optical majority device, high speed and the possibility of nanoscale execution make it very promising for the development and creation of optical computing nanomachines and transceiver nanodevices.

Claims (1)

An optical nanoscale device, characterized in that the first optical nanofiber, the second optical nanofiber, the output optical nanofiber, the optical nanofiber N-input combiner, two sources of the constant optical signal, two telescopic nanotubes are introduced into it, the information inputs of the device are the inputs of the optical nanofiber N- input combiner, the output of the second source of constant optical signal is connected to the input of the second optical nanofiber, the output of the first and the source of the constant optical signal is connected to the input of the first optical nanofiber, the output of the first optical nanofiber is optically connected to the input of the output optical nanofiber, the telescopic nanotubes are located between the output of the optical nanofiber N-input combiner and the output of the second optical nanofiber along the propagation axis of their output optical signals so that in the leftmost (initial) position, the inner nanotube breaks the optical connection between the output of the first optical nanofibers and the input of the output optical fiber, the output device is the output of the output optical nanofibers.