JPS63287904A - Combination of photoconductor, photoconductor and polygonal member - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to optical waveguides or conductors, such as those used in equipment such as telecommunications, and particularly relates to optical waveguides or conductors, such as those used in equipment such as telecommunications, and in particular to optical waveguides or conductors that traverse one optical path of the other.
Regarding the optical path of

Problems to be Solved by the Prior Art and the Invention Backbrain of Computer and Telecommunications Wkfd
Optical conductors currently proposed for use in optical planes include a rocl of light-transmitting material and a cladding with a material having a low refractive index. The bar may have slanted reflector surfaces spaced apart along its length. The reflector surfaces deflect light traveling along the light guide so that the light emerges laterally. ) or laterally and is then deflected to travel along the light guide. Such light guides are D 7 (D, K
Patent No. 55 of 1986 pending in the name of ahn) etc.
No. 483.

As the density and complexity of optical backplanes increases, the system topology (Lopt.

In order to meet the requirements of the light pipes, the need arises to cross the light guides one on top of the other.

In the known technology of metal conductors, this is usually multiple J@(
(multiple layer) printed circuit cards or separate insulated wire leads.

Means for Solving the Problems According to the invention, cross-crossing god-shaped light guides of light transmission material are provided with clappings (cl@tdiB) of material each having a low refractive index. The over device has at least two pairs of opposing, mutually parallel facets, one
light transmissive material, one pair extending across the opposing mutually parallel facets of pair #2;
issive material). Each facet of each pair abuts a respective one of the intersecting light guides.

In one embodiment, the polyhedral member can have the same refractive index as the light guide. Each facet and 11! A coating of a material having a refractive index lower than that of the body of the light guide is located between the end face and the end face. Advantageously, but not necessarily, this coating has the same refractive index as the cladding on the light guide. If the light guide and the polyhedral member are polycarbonate, the coating can be a silicon oxide, for example -quarium oxide.

Advantageously, the coating is provided on the end face of the middle conductor forming the outer cladding of the light guide. Alternatively, the coating can be provided on the polyhedral member itself, ie on the parallel facets.

Preferably, the thickness of the coating on the end face or facet is on the order of the wL length of the light to be transmitted, and is much less than the width of the waveguide or light guide.

The polyhedron member is polyhedron (polybeclron)
, in particular can be parallelepiped, and the light guide has a cross-sectional shape that corresponds to the shape of the facets, preferably rectangular. In one preferred embodiment, the polyhedral member is a cube and the light guide is a square bar. In other embodiments, the polyhedral member has a pair of facets that are angled relative to the other pair such that the conductors intersect at an angle other than perpendicular.

An embodiment of the invention will now be described by way of example only, with reference to the single accompanying drawing in which: FIG.

Each figure shows four optical conduits.
ducL.

r) 10.12.14 and 16, which are arranged so as to provide two optical transmission paths that intersect perpendicularly to each other.
7 formats are concatenated together. Four light guides 10.1
2.14 and 16 are in the same plane and are polyhedrons,
The corresponding facet (f
acet). The light guide comprises a rod of light transmitting plastic material, for example polycarbonate. These rods are connected members 1 whose end faces are cubic.
It has a square cross-sectional shape so as to match the shape of the surface of No. 8 after t5. The surfaces in the i-hand direction are cluttered (c
21.23.25 and 27, and the end faces 10.12.14 and v16 of the rod each have a coating 20.22.24.26. Both the cladding and the coating are made of a material that has a lower index of refraction than the rods and cubes 18.For example, the cladding and the coating can be glass (e.g. index of refraction 1.45/1.54).
(compared to about 1°58 for polycarbonate).

It should be understood that the coating on the end face of the light guide rod can be omitted and instead a coating can be provided on the cube 18. The cube is also [sealed] by a coating to prevent light loss.
It must be.

Any surface of the light guide that does not abut the coated end must therefore have a coating, which can of course be provided by a separate blanking member. However, preferably all faces of the cube are coded.

The thickness of the coating is preferably much less than the spacing between the surfaces, preferably the thickness is on the order of one wavelength.

Arrow A indicates the path taken by light traveling along light guide 10. Upon reaching the end of the conductor 10, the light is qualitatively unhindered by the end face coating (due to the high angle of incidence) and enters the cube 18.

The coatings on the end faces of the light guides 12 and 16, respectively, constitute a series of claddings on the conductor 10, thus allowing the particles to pass across the cube 1B. cube 1
8, the light passes through conductor 14 substantially unhindered by the second endface coating.

The particles traveling along the light guide 12 cut through the cube 18 and are transmitted into the light guide 16 in a similar manner.

The rod can be made of polycarbonate, and the cladding can be made of silicon oxide, e.g. silicon oxide. The cubes can be polycarbonate, and the coating can be the same silicon oxide.

Various modifications are possible without departing from the scope of the invention. For example, the polyhedral member may be a quadrilateral with one pair of facets inclined relative to the other pair of facets. can. If the facet of the polyhedral member is not "used", i.e. no light guide is abutted against it and it does not have its own coating, it is "sealed" by a blanking plate of low refractive index material. ” can be done.

An advantage of embodiments of the present invention is that optical crossover can be achieved in the same facet. Such a planar arrangement facilitates a simple and therefore economical backplane construction.

[Brief explanation of the drawing]

The figure shows a cross-sectional plan view of an embodiment of fJrJl across the light guide. 10.12.14.16...Light guide 18...Coupling member (cube)

Claims (1)

[Claims] 1. In a combination of a plurality of light guides, each light guide is a rod of a light transmitting material, the material having a refractive index lower than that of the rod. and at least two pairs of mutually parallel opposing facets, each facet of each pair abutting a respective one end face of the plurality of light guides. a polyhedral member of material and a coating disposed between a facet juxtaposed to the end face, the coating having an index of refraction less than an index of refraction of the associated facet; Light passing across the polyhedral member from one of the facets of the pair to the other facet of the pair is inhibited from exiting the member through the other facet of the pair. A combination characterized by: 2. The combination according to claim 1, wherein the polyhedron member comprises a polyhedron. 3. The combination of claim 2, wherein the polyhedron comprises a cube and the light guides each have a square cross section. 4. The combination according to claim 1, wherein the coating has a thickness on the order of the wavelength of the light to be transmitted. 5. The combination according to any one of claims 1 to 4, wherein the coating is provided on each end face of the conductor. 6. The combination according to any one of claims 1 to 4, wherein said coating is provided on said surface of said polyhedron. 7. A combination according to any one of claims 1 to 4, comprising a first pair whose facets extend perpendicularly to the second pair. 8. A combination of a plurality of light guides, each light guide being a rod of a light transmitting material, the rod having a cladding of a material having a refractive index lower than that of the rod. , having at least two pairs of mutually parallel opposing facets,
Each facet of each pair corresponds to one of each of the plurality of light guides.
a polyhedral member of light transmitting material abutting one end face and a coating disposed between the end face and a juxtaposed facet, the coating having a refractive index less than the refractive index of the associated facet. such that light passing across the polyhedral member from one facet of the pair to the other facet of the pair passes through the other facet of the pair and exits the member through the other facet of the pair. A light guide for use in a combination adapted to suppress the emission of light, made of a light-transmitting material of polygonal cross-sectional shape and having a cladding with a refractive index lower than that of the material. and having a coating of a low refractive index material extending on an end face of the conductor. 9. A combination of a plurality of light guides, each light guide being a rod of light transmitting material, the rod having a cladding of a material having a refractive index lower than that of the rod; , having at least two pairs of mutually parallel opposing facets,
Each facet of each pair corresponds to one of each of the plurality of light guides.
a polyhedral member of light transmitting material abutting one end face and a coating disposed between the end face and a juxtaposed facet, the coating having a refractive index less than the refractive index of the associated facet. such that light passing across the polyhedral member from one facet of the pair to the other facet of the pair passes through the other facet of the pair and exits the member through the other facet of the pair. A polyhedral member for combinations adapted to inhibit the transmission of light, comprising a block of light transmitting material, wherein at least two pairs of mutually parallel opposing facets of the block are adapted to inhibit the transmission of light. A polyhedral element characterized in that it has a coating of a material having a refractive index lower than that of the material. 10. The light guide according to claim 8, wherein the thickness of the coating on the end face of the conductor is on the order of the wavelength of the light to be transmitted. 11. A polyhedral member according to claim 9, wherein the thickness of the coating on the facets is on the order of the wavelength of the light to be transmitted.