SU1296980A1 - Integral optical resonator which is insensitive to rotation - Google Patents

Abstract

The invention relates to integrated optics and can be used in active components of fiber-optic communication systems and optical information processing devices. The purpose of the invention is to simplify the manufacturing technology of the device by increasing the corrugation period. On counter vxvA / v. the positive surfaces of the plane-parallel substrate 1 are applied waveguide layers 2 and 3 with corrugated areas (PG) 4-7, forming pairs of inverted diffraction coupling elements interlinked with each other. Rasphostranium with waveguide layer 2, wave A, after interacting with PG 5, wave B is emitted into substrate 1. After PG 6, wave C propagates in waveguide layer 3, re-emitting; after interacting with PG 7th c. Cu 1 in the form of a wave D. Z-o6 is closed. A different form of the optical wave path makes the resonator insensitive to rotation. The natural frequency of the resonator and the amplitude of the light wave can be changed by means of means 8. Reducing losses in the device is achieved by performing the corrugation depth of one of the communication elements in each layer monotonically increasing, and the other monotonically decreasing along the wave travel. 2 hp lts, 1 il. in I A / LLAL. / .. ff / I II С С b7

Description

; The invention relates to integrated optics and can be used in the active components of fiber-optic communication systems and optical information processing devices.

The purpose of the invention is to simplify the fabrication technology of a resonator by increasing the corrugation period.

The drawing shows a section resorted to the cross relative to the second pair, i.e. The coupled elements of communication are located on the diagonal of the quadrilateral, the vertices of which are the centers of the corrugated sections.

The depth of the corrugation of the second and fourth sections monotonously increases, according to the law S (Z) (a - Z) v. Posolo15

the corrugations of the first and third sections monotonously decrease in the positive direction of the Z axis according to the same law.

The periods of the corrugation are selected according to the ratio

HA, - (N, -N,)

20

V. (

R

(NJ - N)

(3)

(four)

 It is the plane perpendicular and the normal direction of the Z axis, and the depth to the surface of the substrate and to the direction of the lines of the corrugation. ,

The drawing shows: 1 — a plane-parallel substrate; 2 — the first water-water layer, for example, a gradient layer; 3 - the second waveguide, for example, gradient layer; 4–7 — the first, second, third, and fourth corrugated sections, respectively, with a straight line | 1 the first direction of the corrugation lines perpendicular to the plane; 8 is a means for changing the refractive index or absorption index of the waveguide layer. The arrows show the wave in the resonator.

The substrate is made of a dielectric or semiconductor material that is optically transparent at the working wavelength. Wave layers channel at least one mode in each layer, and the effective refractive index of the working mode NJ of the first waveguide layer is not necessarily equal to the effective refractive index N of the working mode of the second layer. The material of the first waveguide layer may be different than the material of the second waveguide layer.

The periods of corrugation satisfy the inequalities

.. r ±,

to

+ n ,. H

+ B + 1,

R

R

1.2,

(one)

3.4,

(2)

where L is the corrugation period of the i-ro portion (i 1,2,3,4); Ld is the wavelength in vacuum;

N and N are the effective refractive indices for the working mode in the first and second aquifer, respectively.

Due to the flatness of the substrate, the angle of output of the light wave

25 from one layer equals the angle of input of the same light wave from one layer equal to the angle of insertion of the same light wave into another layer for each pair of diffractive communication elements, therefore, relations 30 (3) and (4) express the condition of mutual optical coupling of the first and the second waveguide layers using reversed diffractive elements. When b N we get A A., but - 35 i may differ from,

The resonator operates as follows.

The wave A transmitted by the first waveguide layer 2 with the effective refractive index N is emitted into the substrate as a result of interaction with the corrugated section 5, and due to inequality (1) only one diffracted wave B appears,

45 points backwards. With a sufficiently long length of the corrugated section 5, almost all the power of wave A is emitted in the form of wave B. Due to relation (3), the angle of incidence of wave B

50 to the corrugated section 6 is equal to the angle of incidence, in which a guided wave C with an effective refractive index N is excited in the waveguide layer 3. In view of the inequality

40

Corrugated areas 4 and 7 obra-55 2), wave C is aligned with the wave

This is the first pair of conjugates between A. Due to the monotonous age of reversed diffraction elements, according to the law (V (Z) (a - Z) of communication glasses, and sections 5 and 6 are secondary lines of the corrugation of section 5 along wave A

Rui pair. The first pair of communication elements of the monotonous decrease in the same

crosswise to the second pair, i.e. The coupled elements of communication are located on the diagonal of the quadrilateral, the vertices of which are the centers of the corrugated sections.

The depth of the corrugation of the second and fourth sections monotonically increases, according to the law S (Z) (a - Z) V.

the corrugations of the first and third sections monotonously decrease in the positive direction of the Z axis according to the same law.

The corrugation periods are selected in the hundredth direction of the Z axis, and the depth

relations

HA, - (N, -N,)

(3)

V. (

R

(NJ - N)

(four)

31296980

the law of the depth of the corrugation of section L along wave C, wave B is aperture-consistent 2N

IV - - -

N + 1

V-T7 times that when N-v 3

is 150%. This simplifies the design of the resonator and, therefore,

6 when a wave is dropped, moreover, the wave technology of its manufacture, since the requirements to the vibro-stability of technological installations are reduced.

This is due to the complex-conjugate wave B, which would be emitted by the part B and B are plane uniform waves. In view of this, almost entirely the power of wave B passes into wave C. As a result, the interaction

by which the corrugation is carried out. The presence of two waveguide words with a sufficiently extended corrugated-10eV expands the functional potential of the section 7, radiation to the substrate occurs, and due to imbalances (2) only one diffracted wave D occurs, whose power is almost equal to the power of the wave or frequencies are C. As a result of relation (A), the damping angle of the resonator; day wave D on. the corrugated portion 4 is equal to the angle of incidence, in which the guided mode A.20 is excited in waveguide layer 2

Due to the monotonous growth of the resonator, since one and the layers can be used, for example, to input or generate radiation, and the other to output radiation

Claims (3)

1. An integrated-optical resonator insensitive to rotation, with a substrate holding a plane-parallel plate, a waveguide layer on one surface of the substrate 25 made of an electro-optical material, two coupling elements in the form of relief-phase gratings with parallel lines of corrugation, The means for changing the refractive index of the waveguide layer, and these elements of the connection are conjugated between one another and the fact that in order to increase the design technological effectiveness by increasing the period 1. An integrated optical resonator insensitive to rotation, containing a substrate in the form of a plane-parallel plate, a waveguide layer on one surface of the substrate, 25 made of an electro-optical material, two coupling elements in the form of relief-phase gratings with parallel grooves of corrugation, means for changing the refractive index of the waveguide layer, and these elements of the connection are conjugated to each other, characterized in that in order to improve the manufacturability of the structure by increasing the period Sun power of wave D. In view of inequality (1), wave A is co-directed with wave C. Thus, the optical path of the wave turns out to be closed and the resonance-35 of the corrugation, the second torus is introduced into the resonator, which is annular, with a waveguide layer with two similar to the Z-shaped optical shape. the way he is insensitive to rotation. The presence of means 8, which change, for example, the refractive index of the wave layer 40 is optically conjugated to the elec- trode layer 2, causes the coupling layers to change the second layer, and all the optical wavelength in the resonator and, consequently, to change their own resonator frequency. If the tool 8 changes the loss absorbance 45, the depth of the corrugation of a single layer 2, then the attenuation of the coupling elements in each layer of the resonator changes and, consequently, the amplitude of the light wave. The depth of the corrugation 6 can be monotonously varying according to another, for example, exponential law. The diffracted waves in this case are not uniform. The proposed resonator circuit is represented by communication elements, which is located on the opposite surface of the substrate, the communication elements with the communication elements being reversed. 2. Resonator pop. 1, which differs by the fact that, with the aim of decreasing monotonically increasing, and the other - monotonously decreasing along the course of the wave. 3. Resonator on PP. 1 and 2, characterized in that, in order to expand the functionality, a means is introduced into the device changes in the absorption index will increase the working period of corrugated water layers. VNIIPI Order 775/48 Production polygr, pr-tie, Uzhgorod, st. Project, 4 2N IV - - - N + 1 -T7 by which the corrugation is carried out. The presence of two waveguide layers is associated with variations in the natural frequencies and resonator damping; resonator, since one of the layers can be used, for example, to input or generate radiation, and another - to output radiation or changing the natural frequencies and damping of the resonator; Invention Formula or changing the natural frequencies and damping of the resonator; 1. Integrated optical resonator insensitive to rotation, containing a substrate in the form of a plane-parallel plate, a waveguide layer on one surface of the substrate, made of an electro-optical material, two coupling elements in the form of relief-phase gratings with parallel lines of the corrugation, means for changing the index the refraction of the waveguide layer, and these elements of the connection are conjugated to each other, characterized in that in order to improve the manufacturability of the structure by increasing the period the corrugation, the second waveguide layer with two similar layers is optically coupled with the second layer communication elements, and all losses, the corrugation depth of one of the communication elements in each layer the corrugation, the second waveguide layer with two similar layers is optically coupled with the second layer communication elements, and all losses, the corrugation depth of one of the communication elements in each layer by the communication elements, which is located on the opposite surface of the substrate, the communication elements of pergofishing, the second waveguide layer with two similar layers is optically coupled with the communication elements of the second layer, and all losses, the corrugation depth of one - of the communication elements in each layer communication elements are reversed. 2. Resonator pop. 1, which differs from the fact that, in order to be smoked, a second waveguide layer was introduced into the resonator with two similar layers optically conjugated with the coupling elements of the second layer, and all losses were , the depth of the corrugation of one of the communication elements in each layer made monotonously increasing, and the other monotonously decreasing along the course of the wave. 3. Resonator on PP. 1 and 2, characterized in that, in order to expand the functionality, a means is introduced into the device Changes in Absorption Rate Vol. Subscription