Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04B—TRANSMISSION
  • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
  • H04B10/80—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water
  • H04B10/801—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water using optical interconnects, e.g. light coupled isolators, circuit board interconnections
  • H04B10/803—Free space interconnects, e.g. between circuit boards or chips
• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
  • G02B6/24—Coupling light guides
  • G02B6/42—Coupling light guides with opto-electronic elements
  • G02B6/43—Arrangements comprising a plurality of opto-electronic elements and associated optical interconnections

Definitions

• the invention relates to an optical data connection between adjacent modules, which are arranged parallel to one another within a module frame, in which at least one correspondingly modulated light beam is emitted from one module to the neighboring module through the interspace between neighboring modules.
• at least one transmitter module with a laser diode arrangement which emits a slightly divergent light beam, is arranged on one module, and at least one receiver module with a photodiode arrangement is arranged on the opposite module.
• Such an optical data connection is e.g. B. from DE 37 39 629 AI known.
• transmission can only take place in one direction, since each module has only one transmitter module on one side and one receiver module on the other side.
• optical data connections between adjacent modules are already known (see, for example, “Optoelectronic interconnection based on a light-guiding plate with holographic coupling elements", Optical engineering 30 (10), 1620-1623 (Oct. 1991), which one In this case, the optical connection is made via a light-conducting glass plate in the backplane, which results in considerable problems with the coupling and uncoupling of the light beams from the light-conducting glass plate.
• This object is achieved in an optical data connection of the type mentioned in that a one-piece transmission and reception module with a laser diode arrangement and a photodiode arrangement (PD) is provided on one side of each assembly, the laser diode arrangement and the photodiode arrangement being located within the transmission and Receiving module lying parallel to the module circuit board and offset by a certain amount opposite each other, surface plan mirrors for deflecting the light beams by 90 degrees are provided between these two arrangements in the respective beam paths, and that one of the light beams through an opening in the module circuit board passes through.
• a one-piece transmission and reception module with a laser diode arrangement and a photodiode arrangement (PD) is provided on one side of each assembly, the laser diode arrangement and the photodiode arrangement being located within the transmission and Receiving module lying parallel to the
• the optical data connection according to the invention is characterized by a simple structure. Because a single module is necessary for sending and receiving and openings are provided in the assembly at the assembly location of the module, a single module can transmit and receive in both directions.
• An advantageous embodiment of the optical data connection according to the invention can be characterized in that the transmitting and receiving module contains several laser diode and photo diode arrangements next to one another.
• 1 shows the basic structure of an optical data connection according to the present invention
• 2 shows the basic structure of transmit and receive modules for establishing an optical data connection, the modules being able to transmit and receive in both directions.
• FIG. 1 shows the basic structure of an optical data connection according to the present invention between two component circuit boards BGL, which are arranged in parallel next to one another.
• Sending locations SO and receiving locations EO are arranged on each printed circuit board, the corresponding receiving locations
• the beam expansion can be seen in FIG. 1, as a result of which the optical connection is position-tolerant and does not have to be adjusted.
• the expansion is optimized for maximum reception power with given tolerances and connection lengths.
• the sending location essentially consists of a laser diode and the receiving location essentially consists of a photodiode.
• the sending location SO and receiving locations EO can be accommodated within one sending and receiving module SEM.
• Lenses L are combined with the laser diodes LD and with the photodiodes PD to form the light beam. These lenses are each integrated with a laser diode LD or a photodiode PD in a submodule. This integration can also include the electronics required for electro-optical conversion.
• the submodules are arranged horizontally to reduce the module height. The deflection in the direction of radiation takes place via surface plan mirror SP.
• all the necessary components are arranged in a single module.
• the module SEM can be attached to both sides of an assembly in order to establish connections on two sides. If, as shown in FIG. 2, openings are provided in the module circuit board and in the corresponding housing wall of the module, a single module can send and receive in both directions.
• a module can contain several transmit and receive channels next to one another, the minimum channel spacing being in the range from 5 to 10 mm.
• optical connections to neighboring assemblies no longer have to be routed over the rear wall, the rear wall is relieved, the routing on the assembly is simplified.
• the optical connection can transmit almost any data rate, the only limitation being the electro-optical converters.
• Transmitting and receiving modules can be arranged as desired on the module circuit board, even in the immediate vicinity of high-frequency sources and sinks.
• the optical data connection is a contactless connection, which eliminates the use of connectors.

Landscapes

• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Optics & Photonics (AREA)
• Electromagnetism (AREA)
• Engineering & Computer Science (AREA)
• Computer Networks & Wireless Communication (AREA)
• Signal Processing (AREA)
• Optical Couplings Of Light Guides (AREA)
• Optical Communication System (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=6529214

Family Applications (1)

Country Status (8)

Families Citing this family (5)

Family Cites Families (5)

• 1994
  • 1994-09-26 DE DE19944434358 patent/DE4434358C1/de not_active Expired - Lifetime
• 1995
  • 1995-09-12 EP EP95930393A patent/EP0783807A1/de not_active Ceased
  • 1995-09-12 BR BR9509207A patent/BR9509207A/pt not_active IP Right Cessation
  • 1995-09-12 WO PCT/DE1995/001247 patent/WO1996010302A1/de not_active Application Discontinuation
  • 1995-09-12 JP JP8511257A patent/JPH09511885A/ja active Pending
  • 1995-09-12 CA CA002200866A patent/CA2200866C/en not_active Expired - Fee Related
  • 1995-09-12 CN CN95196067A patent/CN1076549C/zh not_active Expired - Fee Related
  • 1995-09-15 TW TW84109673A patent/TW300287B/zh not_active IP Right Cessation

Non-Patent Citations (1)

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