A semiconductor laser module comprises a semiconductor laser device, an optical fiber, and a lens for coupling light emitted from the semiconductor laser device to the optical fiber There is provided a metal base having a flat portion and a pipe portion in a metal case The semiconductor laser device is mounted on a chip carrier which is mounted on the flat portion of the metal base The lens is fixed in the inside of the pipe portion of the metal base The optical fiber is protected at one end by a ferrule which is fixed to the pipe portion of the metal base A device such as a monitor photodiode and a thermistor may be mounted on the flat portion of the metal base The flat portion of the metal base may be formed with a concave portion of an area smaller than an area of the bottom of the chip carrier The chip carrier is soldered to the flat portion of the metal base by a low temperature solder to provide thermal connection therebetween, and by a spot welding at a point other than the soldered portion of the low temperature solder

Semiconductor laser module

The optical module of the invention for high-speed bidirectional transceiver consists of a signal receiving unit, a signal transmitting unit, a common receiving-transmitting optical fiber, and a fiber coupling unit. The laser diode and the photodiode are arranged parallel to each other in closely located recesses of the module housing. Such an arrangement makes it possible to shorten distances for guiding lead wires from the terminals of the PC board to the respective terminals of the transmitting and receiving diodes. The laser diode emits a first transmitting laser beam that passes through a microobjective that collimates the beam and directs into onto a full-reflection mirror located inside the module housing. The full-reflection mirror reflects the first transmitting beam at an angle of 90° and transmits it to the end face of an optical fiber through an optical fiber collimator that centers the beam with the fiber core. The module is provided with a second mirror, which is fully transparent to the aforementioned first transmitting beam, but is fully reflective to a second transmitting beam that may propagate in a direction opposite to the first transmitting beam on a different wavelength. Alignment of the optical components is facilitated due to the fact that it is carried out with diffractionally limited and collimated beams.

Optical module for high-speed bidirectional transceiver

A compact bidirectional module for multichannel use includes at least one transmitter and at least one receiver combined in a transmission/reception unit installed in a common housing, and at least one further such transmission/reception unit or at least one additional transmission unit or one additional reception unit provided in the common housing. In one preferred embodiment of the present invention, the transmission/reception unit is constructed in accordance with a bidirectional transceiver module which is described in German Published, Non-Prosecuted Patent Application DE 93 120 733 A1 and is also referred to as a TO-BIDI module, and additional transmission or reception units are likewise constructed by using the TO construction. Thus, a compact module that combines the assemblies of the known BIDI module and those of the TO-BIDI module, with their characteristics is provided.

Bidirectional module for multichannel use

An optoelectronic assembly which provides for enhanced alignment between the internal components thereof. The assembly includes a housing having a base portion and a cover portion, the housing including therein a circuitized substrate. A pair of optoelectronic devices (transmitter and receiver components) are initially movably (loosely) positioned within the housing. The invention utilizes an alignment member which is secured to the housing while positively engaging the movably positioned devices and precisely align these devices with respect thereto such that these devices are in turn precisely aligned with optic means (e.g., a duplex optical connector) when the optic means is positioned within the alignment member. In one embodiment, the housing is of metallic material while the alignment member is a molded plastic structure. The alignment member may also include shutter means therein for safety purposes.

Optoelectronic assembly with alignment member

An optical data link using a single optical fiber for bi-directional optical communication. Bi-direction optical transceivers couple to the single optical fiber having two optical channels of communication. An optical subassembly in each optical transceiver to multiplex an optical transmit signal and demultiplex an optical receive signal within the bi-direction optical transceiver. The optical subassembly includes an optical block with an optical filter to reflect at least one wavelength of light and to allow passage of another wavelength of light. Embodiments of the optical block with the optical filter are described.

Systems, methods and apparatus for bi-directional optical transceivers

A transmission and reception module for a bidirectional optical communication network characterized by a housing containing a laser diode, a first spherical lens for focussing the output of the laser diode on a first beam path, a second spherical lens arranged on the first beam path for focussing the light from the first lens at a focal point at which an end face of an optical fiber is positioned, a beam splitter which is at least partially transmissive to light of a first wavelength from the laser diode and partially reflective of light of a second wavelength being emitted from the fiber into a second beam path on which a detector is positioned. To improve the positioning, the first lens and the laser diode are mounted on a carrier member in a fixed relationship which enables assembling the device with less problems with maladjustment.

Transmission and reception module for a bidirectional communication network

Transmitting and receiving module for a bidirectional optical communication network, particularly for a broadband ISDN, in which between a laser diode (LD) and a fiber end (FE) comprises two spherical lenses (KL1, KL2) are arranged at a distance from each other that the laser light onto the fiber end focus. Between the ball lenses, a light beam separating means (LT) arranged the one of the fiber end in the direction of the transmitter remote lens (KL2) divergently radiated and bundled by this lens light having the wavelength (λ₁) of the laser light different wavelength (λ₂) of the optical path (SG1) is separated and a detector (D) feeds. Such a module is dejustageempfindlich. To avoid this, the laser diode (LD) can be and this obvious lens (KL1) on a common carrier body (TK) relative to each other fixed dejustagesicher. This is based on the recognition that the location of the module dejustageempfindlichste between these components is located. Further embodiments of such a module and method for its preparation are given.

Emission-reception module for a bidirectional communication network, particularly a broadband ISDN

The opening (2a) in the auxiliary support (2) is covered by a thin layer formed from the same material, through which the light passes. An Independent claim is included for the method of making the corresponding optical component, in which during etching of the opening, a covering layer or window of thickness up to 50 microns m is permitted to remain (not shown).

Optoelectronic component with light emitter or -receiver in mounting system, includes thermally-conductive auxiliary support with thin window in same material

The invention relates to an optoelectronic component with a light emitting or light receiving element ( 1 ) and a system carrier ( 9 ) supporting the element ( 1 ). The element ( 1 ) emits or receives light on a light transmitting surface ( 1 a ), an auxiliary carrier ( 2 ) made of heat conductive material and transparent at least in some areas or at least translucent being provided. Said auxiliary carrier ( 2 ) is connected to the system carrier ( 9 ) and is thermally coupled to the element ( 1 ). The invention also relates to a method for the production of such an optoelectronic component.

Optoelectronic component with thermally conductive auxiliary carrier

The invention relates to an optoelectronic component comprising a light-emitting or light- receiving element (1) and a system carrier (9) supporting said element (1). The element (1) emits or receives light on a translucent surface (1a). An auxiliary carrier (2) which is made from a heat conductive material and which is at least permeable with respect to light in certain places or at least translucent is provided. Said carrier is connected to the system carrier (9) and thermally coupled with the element (1). The invention also relates to a method for the production of said optoelectronic component.

Hans Ludwig Althaus

Papers

Transmission and reception module for a bidirectional communication network

Emission-reception module for a bidirectional communication network, particularly a broadband ISDN

Optoelectronic component with light emitter or -receiver in mounting system, includes thermally-conductive auxiliary support with thin window in same material

Optoelectronic component with thermally conductive auxiliary carrier

Optoelectronic component and method for the production thereof