SU1633370A1 - Optical demultiplexor - Google Patents

Abstract

The invention relates to the field of optical information processing and can be used to build parallel optical computers. The purpose of the invention is to increase the number of multiplied optical signals. A positive effect is achieved by introducing between the two protective plates a set of planar waveguides formed by alternating optically transparent layers with a high and low refractive index. A set of waveguides is made in the shape of a cylindrical segment with an angle of 40 °. between flat edges, which are shown respectively by the light-absorbing and light-reflecting layers, and a concave diffraction grating and optical input-output are attached to the cylindrical surface of the set. 2 Il.

Description

The invention relates to optical information processing and can be used to build parallel optical computing machines.

The aim of the invention is to increase the number of multiplied optical signals.

FIG. 1 shows an optical de-multiplexer, front view, side view and view A, FIG. 2 is a diagram explaining his work.

Optical demultiplexer (Fig. 1 contains two protective plates 1 of a material with a low refractive index. Between which there are interleaved transmitting optically transparent layers 2 with high and low refractive index glasses, and layers with a high refractive index are adjacent to the protective plates. The glider WAVE-FLOURDS are made in the form of a cylindrical segment with an angle of 90 between flat edges, one of which is covered with a light-absorbing layer 3, and the other with a reflective layer 4.

A concave cylindrical diffraction grating 5 with a width of 1 to 1 is attached to the cylindrical surface of the set of glider waveguides on the side of the arrangement of the light-absorbing layer.

Further, at distances x 1gi 1e, the ichticheg inputs 6 and the drain are attached to the cylindrical surface; 7. Letters R and h denote the waveguide paaHvc and the thickness of the waveguide set, respectively.

about oe with co i

A set of glider waveguides can be made of two types of glass foil, marked and scaled to the required size, after which it is mechanically processed. The connection to the protective plates is, for example, carried out using an optical adhesive.

The number of fibers in the fiber optic inputs and outputs is determined by the number of waveguides that can reach v103, with a thickness of 20 mm, 1, 6 mm,

um In this case, 12–7 mm, h – 12 mm. Lattice Period

20

25

thirty

waveguides - About

 15 mm;

0.4 microns.

The radius of curvature of the lattice 5 is two ase larger than the radius of curvature of the cylindrical surface of the set of wavelets R, which is the radius of the circle of the Owland. The grid is glued to the cylindrical surface with an optical adhesive, and the adjustment is provided, for example, with the aid of micrometer heads with a piezoelectric actuator. Accurate alignment of fiber components with a set of waveguides is also achieved using micrometer heads.

Optical demultiplexer works as follows.

Source binary signal in volume

h

An nL bit in the form of a broad spectral flux is fed to the input of the demultiplexer via fiber optic inputs 6. The light beam introduced through each optical fiber propagates in the corresponding waveguide. After reflection by the mirror 4 (layer), the light beam is diffracted by the reflective concave diffraction grating 5 and is divided into two light fluxes — a zero order flux that is absorbed by the light-absorbing layer 3 and the dispersed light flux propagating through the reflective layer 4 the direction of the fiber optic terminals 7. Due to the dispersion (decomposition into the spectrum) of a single light beam, n is multiplied; therefore, the dispersed light flux is output through the n optical output fibers in hair 55

35

40

45

50

0

five

0

five

0

five

five

0

five

0

equine optical outputs 7f Decomposition of the input light beam is shown by solid and dashed lines.

(Figure 3).

Due to the linearity of the optical circuit, the remote multiplexer can also realize the operation of combining signals, for which input signals (n signals) are supplied to the fiber optic leads 7, and output signals are removed from the fiber optic inputs 6.

A large number of multiplied optical signals with a small size of the demultiplexer j and a low level of noise, due to the peculiarities of its design, allows its use in advanced optical computing machines.

Claims (1)

Invention Formula Optical demultiplexer containing two protective plates of a material with a low refractive index and an optically transparent layer with a high refractive index located on the same protective plate, the side surfaces of the plates are cylindrical in shape, a concave cylindrical diffraction grating attached to the cylindrical surface of the protective plates and fiber optic inputs -outputs, characterized in that, in order to increase the number of multiplied optical signals, it contains a set of alternating birdlike transparent layers with high and low refractive index, located between the other protective plate and the optically transparent layer, protection-. The plates and optically transparent layers are made in the form of a cylindrical segment with an angle of 90 ° between flat edges, one of which is covered with a light reflecting layer, and the other with a light absorbing layer, the diffraction grating is attached to the cylindrical surface of the optically transparent layers from the side of a flat face covered with a light absorbing layer , and fiber-optic I / Os are attached to the cylindrical surface of optically transparent layers.  X i N Editor IDCulla Compiled by S. Babkin Tehred A. KravchukKorrektor O.Shshle FIG. i // Rig 2  ,