EP-4742467-A1 - LIGHT SOURCE, PHOTOELECTRIC CONVERSION APPARATUS, RELATED DEVICE AND SYSTEM

EP4742467A1EP 4742467 A1EP4742467 A1EP 4742467A1EP-4742467-A1

Abstract

A light source, a photoelectric conversion apparatus, a related device, and a system are provided. The light source includes a first substrate (302), a drive circuit, and a first laser (202). Two surfaces of the first substrate (302), namely, a first surface (321) and a second surface (322), are respectively located in a first packaging space (311) and a second packaging space (312). The first laser (202) is packaged in the first packaging space (311) or the second packaging space (312), and the drive circuit is packaged in at least one of the first packaging space (311) and the second packaging space (312). In addition, a packaging space in which the first laser (202) is packaged is different from a packaging space in which at least a part of the drive circuit is packaged. The drive circuit is electrically connected to the first laser (202) through the first substrate (302), to drive the first laser (202) to emit light, to increase peak optical power output by the light source when a size of the light source can be effectively reduced.

Inventors

ZHU, Dingjun
JIANG, HONGXING
ZHOU, Dangqun

Assignees

Huawei Technologies Co., Ltd.

Dates

Publication Date: 20260513
Application Date: 20240722

Claims (14)

A light source, comprising a first substrate, a drive circuit, and a first laser, wherein the drive circuit is electrically connected to the first laser through the first substrate, and the drive circuit is configured to drive the first laser to emit light; the light source comprises a first packaging space and a second packaging space that are stacked in a direction perpendicular to the first substrate, a first surface of the first substrate is located in the first packaging space, a second surface of the first substrate is located in the second packaging space, and an orientation of the first surface is opposite to an orientation of the second surface; and the first laser is packaged in the first packaging space or the second packaging space, the drive circuit is packaged in at least one of the first packaging space and the second packaging space, and a packaging space in which the first laser is packaged is different from a packaging space in which at least a part of the drive circuit is packaged.
The light source according to claim 1, wherein in the direction perpendicular to the first substrate, the light source further comprises a circuit board stacked with the first substrate, a surface that is of the circuit board and that faces the first substrate is located in the first packaging space, and the first surface is a surface that is of the first substrate and that faces the circuit board.
The light source according to claim 1 or 2, wherein in the direction perpendicular to the first substrate, the first substrate comprises at least a first sub-substrate and a second sub-substrate that are stacked, the first sub-substrate comprises a first current channel passing through the first sub-substrate, the second sub-substrate comprises a second current channel passing through the second sub-substrate, any one of a plurality of first current channels is electrically connected to one of a plurality of second current channels, and the drive circuit is electrically connected to the first laser through the first current channel and the second current channel.
The light source according to claim 3, wherein a first orthographic projection partially overlaps with a second orthographic projection, the first orthographic projection is an orthographic projection of the any one of the plurality of first current channels, and the second orthographic projection is an orthographic projection of the one of the plurality of second current channels.
The light source according to any one of claims 1 to 4, wherein the drive circuit comprises a first electrical module and a second electrical module, the first electrical module is packaged in the first packaging space, and the second electrical module is packaged in the second packaging space.
The light source according to any one of claims 1 to 4, wherein the first laser is packaged in the first packaging space, and the drive circuit is packaged in the second packaging space; or the first laser is packaged in the second packaging space, and the drive circuit is packaged in the first packaging space.
The light source according to any one of claims 1 to 6, wherein the light source further comprises a second laser electrically connected to the drive circuit, the drive circuit is electrically connected to the second laser through the first substrate, and the drive circuit is further configured to drive the second laser to emit light; and the second laser is packaged in the first packaging space or the second packaging space.
The light source according to any one of claims 1 to 7, wherein in the direction perpendicular to the first substrate, the light source further comprises a second substrate stacked with the first substrate, the second packaging space comprises a first packaging subspace and a second packaging subspace, a third surface of the second substrate and the second surface are located in the first packaging subspace, the third surface is a surface that is of the second substrate and that faces the first substrate, a fourth surface of the second substrate is located in the second packaging subspace, and an orientation of the third surface is opposite to an orientation of the fourth surface; and the first laser is packaged in one of the first packaging space, the first packaging subspace, and the second packaging subspace, and the drive circuit is packaged in at least one of the first packaging space, the first packaging subspace, and the second packaging subspace.
A photoelectric conversion apparatus, comprising a processing module, a modulation module, a demodulation module, a transmit port, a receive port, and the light source according to any one of claims 1 to 8, wherein the processing module is connected to the modulation module and the demodulation module, the modulation module is connected to the light source and the transmit port, and the demodulation module is connected to the receive port; the processing module is configured to send a first service electrical signal to the modulation module; the light source is configured to send an optical signal to the modulation module; the modulation module is configured to modulate the first service electrical signal onto the optical signal to obtain a first service optical signal; the transmit port is configured to emit the first service optical signal; the receive port is configured to receive a second service optical signal; and the demodulation module is configured to demodulate the second service optical signal into a second service electrical signal, and send the second service electrical signal to the processing module.
An optical communication device, comprising an outer housing, a processor, and the photoelectric conversion apparatus according to claim 9, wherein the outer housing is configured to fasten the processor to the photoelectric conversion apparatus, and the processor is connected to the photoelectric conversion apparatus; and the processor is configured to send the first service electrical signal to the photoelectric conversion apparatus, and is further configured to receive the second service electrical signal from the photoelectric conversion apparatus.
A radar, comprising a controller, a receiving apparatus, and the light source according to any one of claims 1 to 8, wherein the controller is connected to the light source and the receiving apparatus; the light source is configured to emit a laser beam; the receiving apparatus is configured to receive an echo light beam, and is configured to perform photoelectric conversion on the echo light beam to obtain a detection electrical signal, wherein a to-be-detected object is configured to reflect the laser beam to reflect the echo light beam to the receiving apparatus; and the controller is configured to detect the to-be-detected object based on the detection electrical signal.
A projection system, comprising an image modulation module, a lens, and the light source according to any one of claims 1 to 8, wherein the image modulation module is configured to receive a projected light beam from the light source, is configured to modulate the projected light beam to obtain a modulated light beam, and is further configured to transmit the modulated light beam to the lens; and the lens is configured to perform imaging on the modulated light beam.
A head-up display system, comprising an optical deflection module and the projection system according to claim 12, wherein the projection system is configured to transmit the modulated light beam to the optical deflection module; and the optical deflection module is configured to transmit an amplified modulated light beam to a windshield, wherein the modulated light beam reflected by the windshield forms a virtual image.
A transportation means, comprising a vehicle body, a windshield, a processor, and the head-up display system according to claim 13, wherein the vehicle body is configured to fasten the windshield, the processor, and the head-up display system together; the processor is configured to transmit vehicle driving related information to the image modulation module; and the image modulation module is configured to modulate the vehicle driving related information onto the projected light beam to obtain the modulated light beam.

Description

This application claims priority to Chinese Patent Application No. CN202310928570.6, filed with the China National Intellectual Property Administration on July 26, 2023 and entitled "LIGHT SOURCE, PHOTOELECTRIC CONVERSION APPARATUS, RELATED DEVICE, AND SYSTEM", which is incorporated herein by reference in its entirety. TECHNICAL FIELD This application relates to the field of optical communication technologies, and in particular, to a light source, a photoelectric conversion apparatus, a related device, and a system. BACKGROUND Light sources used to emit lasers are used in an increasingly wide range of fields. For example, the light source is used in a radar, a passive optical network (passive optical network, PON), an optical transport network (optical transport network, OTN), an industrial optical network, and the like. An example in which the light source is used in a radar is used. Peak optical power output by the light source is in a positive correlation with a detection range of the radar. Therefore, increasing the peak optical power output by the light source can increase the detection range of the radar. The light source includes a laser and a heat sink. The heat sink is configured to dissipate heat for the laser, to ensure that the laser is always within a preset temperature range, so that peak optical power output by the laser is increased. For example, the heat sink is attached to the laser, and the heat sink may implement heat dissipation for the laser through a water cooling passage. To increase the peak optical power output by the laser, a quantity of lasers needs to be increased. When the quantity of lasers is increased, to ensure heat dissipation for the lasers, a size of the heat sink needs to be increased. Increasing the size of the heat sink included in the light source causes a problem of an increased size of the light source. In addition, using only the heat sink to increase the peak optical power output by the laser has limited effect on increasing the peak optical power output by the laser. SUMMARY Embodiments of this application provide a light source, a photoelectric conversion apparatus, a related device, and a system, to increase peak optical power output by the light source when a size of the light source is effectively reduced. According to a first aspect, an embodiment of this application provides a light source that includes a first substrate, a drive circuit, and a first laser. The drive circuit is electrically connected to the first laser through the first substrate, and the drive circuit is configured to drive the first laser to emit light. The light source includes a first packaging space and a second packaging space that are stacked in a direction perpendicular to the first substrate, a first surface of the first substrate is located in the first packaging space, a second surface of the first substrate is located in the second packaging space, and an orientation of the first surface is opposite to an orientation of the second surface. The first laser is packaged in the first packaging space or the second packaging space, the drive circuit is packaged in at least one of the first packaging space and the second packaging space, and a packaging space in which the first laser is packaged is different from a packaging space in which at least a part of the drive circuit is packaged. It may be understood that a packaging manner of the first laser and the drive circuit may be the following example. For example, the first laser is packaged in the first packaging space, and the drive circuit is packaged in the second packaging space. For another example, the first laser is packaged in the first packaging space, a part of the drive circuit is packaged in the first packaging space, and the other part is packaged in the second packaging space. For another example, the first laser is packaged in the second packaging space, and the drive circuit is packaged in the first packaging space. For another example, the first laser is packaged in the second packaging space, a part of the drive circuit is packaged in the first packaging space, and the other part is packaged in the second packaging space. As shown in this aspect, the drive circuit is electrically connected to the first laser directly through the first substrate, so that a physical length of an electrical connection loop between the drive circuit and the first laser is short. The physical length of the electrical connection loop between the drive circuit and the first laser is in a negative correlation with a drive current. The drive current is used to drive the first laser to emit light. The drive current is in a positive correlation with a peak optical power output by the first laser. In this case, when the physical length of the electrical connection loop between the drive circuit and the first laser is short, the peak optical power output by the first laser is effectively increased. It may be understood that, according to the li