Opto-electric module

Details Opto-electric module Opto-electric module

1999-09-09

2001-04-24

Sugarman, Scott J. (Department: 2873)

Optical: systems and elements

Optical modulator

Light wave temporal modulation

C359S237000, C385S008000, C385S088000

Reexamination Certificate

active

06222665

ABSTRACT:

BACKGROUND OF THE INVENTION
The invention is directed to an opto-electrical module for converting optical signals into electrical signals or, respectively, electrical signals into optical signals.
Such modules are frequently employed in broadband communication systems such as, for example, in communication systems operating according to an asynchronous transfer mode (ATM) since signal conversions of optical signals into electrical signals and vice versa are in part provided within such a system. For example, due to the requirement of a high data throughput rate, a transmission of message signals, in the form of message cells in an ATM system, thus frequently only ensues in electrical form within existing switching networks. After passing through such a switching network, for example, a plurality of message signals streams to be forwarded in the same direction is then multiplexed and converted by an electrical/optical transducer into an optical multiplex signal that is subsequently forwarded to a following system means, for example to a following switching network. In the opposite direction, an optical multiplex signal formed of a plurality of message signal streams and supplied to a switching network is resolved into the individual message signal streams by an optical/electrical transducer and converted into electrical message signal streams. These message signal streams are then forwarded via the corresponding switching network.
SUMMARY OF THE INVENTION
An object of the present invention is then to disclose a way of how an opto-electrical module of the species initially cited can be fashioned in order, on the one hand, to realize this cost-beneficially and, on the other hand, to also design this for the transmission of high bit rates.
In a module of the species initially cited, this object is achieved in that, the module comprises a printed circuit board has a circuit carrier equipped with electrical components that, as an electrical interface on the one hand, comprises a plurality of metallic plugin contacts proceeding parallel in the region of a first end face for direct plugging of the module into a connector element of an electrical assembly that is complementary to these plugin contacts, the printed circuit board, as an optical interface on the other hand, is connected to an optical element in the region of a second end face, and in that components side and back side of the printed circuit board are respectively at least partially covered by a preferably metallic housing part.
The invention thereby yields the advantage that the opto-electrical module can be realized cost-beneficially and in space-saving fashion with simple structural means. Over and above this, the pluggability of the module enables a variable equipping and a simple replacement. Finally, an extremely good, electrical highfrequency junction can be achieved due to the direct contact plugging.
Advantageous developments of the opto-electrical module derive from providing the back side housing part as a cooling member which is glued to the back side, and the housing part for the components' side is a detachably connected cap. In addition, the plug connections are attached to both sides of the circuit board and the optical element is received in a recess in the board. Their advantages shall be discussed in conjunction with the explanation of an exemplary embodiment of the invention.


REFERENCES:
patent: 4744626 (1988-05-01), Mery

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