CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No. 17/259,401, filed Jan. 11, 2021, which is a national stage application of PCT/CN2018/106985, filed Sep. 21, 2018, which claims priority to Chinese Patent Application No. 201810773312.4, filed Jul. 14, 2018, the contents of which are relied upon and are incorporated herein by reference in their entireties.

TECHNICAL FIELD

The present invention relates to the fields of communication optics and data transmission, and in particular, to a short-waveband active optical component based on a vertical emitting laser and a multi-mode optical fiber, which can be used in a short-medium range high-definition multimedia interface (HDMI) device to achieve a short-wave wavelength division multiplexing (SWDM) function.

BACKGROUND

The high-definition multimedia interface (HDMI) technology is a fast data transmission technology widely used in optical communications. At present, an HDMI device has a relatively short transmission distance and a relatively small transmission rate, and the length of the HDMI device cannot be adjusted freely according to actual installation requirements; therefore, it has gradually been unable to meet the requirements of big data (4 K) transmission.

Based on a short-wavelength VCSEL laser signal light source and the optical fiber transmission technology, a new type of active optical component that can realize high-speed transmission of long-distance data signals and can adjust the length of a data line freely according to actual installation requirements is derived in the present patent.

SUMMARY OF THE INVENTION

In view of the existing technology, the purpose of the present invention is to provide a short-waveband active optical component based on a vertical emitting laser and a multi-mode optical fiber, which is low in cost, small in size, high in transmission rate, and capable of realizing the SWDM function in a short-medium range HDMI device.

In order to achieve the above technical objective, the technical solution adopted by the present invention is:

A short-waveband active optical component based on a vertical emitting laser and a multi-mode optical fiber, including an emitting end, a receiving end, and one multi-mode optical fiber;

the emitting end including multiple VCSELs, a first focusing lens array, a first Z-block-shaped prism, and a first focusing lens that are arranged in sequence, the first Z-block-shaped prism having multiple incident faces and an exit end, and the first focusing lens facing the exit end of the first Z-block-shaped prism;

the receiving end including multiple photodiodes, a second focusing lens array, a second Z-block-shaped prism, and a second focusing lens that are arranged in sequence, the second Z-block-shaped prism having multiple exit faces and an incident end, and the second focusing lens facing the incident end of the second Z-block-shaped prism; and one end of the one multi-mode optical fiber facing the first focusing lens, and the other end facing the second focusing lens;

wherein, the multiple VCSELs are configured to be used for generating multiple optical signals of different wavelengths;

the multiple photodiodes (PDs) are configured to be used for receiving the optical signals emitted by the VCSELs;

the first focusing lens array and the second focusing lens array are configured to be used for collimating and focusing optical signals at the emitting end (Tx end) and the receiving end (Rx end);

the first Z-block-shaped prism and the second Z-block-shaped prism are configured to be used for a light combining (MUX) function of the emitting end (Tx end) of the optical component and a light splitting (DEMUX) function of the receiving end (Rx end); and the multi-mode optical fiber (MMF) is configured to be used for transmitting the optical signals generated by the VCSELs.

In addition, an output end and an input end may also each be packaged by a shell.

After the multiple VCSELs at the emitting end emit laser signals into the first focusing lens array, the first focusing lens array focuses the optical signals and correspondingly emits them into the multiple incident faces of the first Z-block-shaped prism. The exit end of the first Z-block-shaped prism emits the received optical signals to the first focusing lens, so that the first focusing lens inputs the optical signals to one end of the multi-mode optical fiber, and the multi-mode optical fiber transmits the optical signals to the other end so as to be emitted to the second focusing lens. The second focusing lens emits the optical signals into the incident end of the second Z-block-shaped prism, and then the second Z-block-shaped prism emits the signal light correspondingly from its multiple exit faces into the second focusing lens array, so that the second focusing lens array focuses the optical signals onto the multiple photodiodes facing it.

Further, the multiple photodiodes at the receiving end are arranged in parallel, and one ends thereof are also provided with VCSELs for sending feedback signals. The focusing lenses of the second focusing lens array one-to-one correspond to the photodiodes and the VCSELs at the receiving end, and the multiple exit faces of the second Z-block-shaped prism one-to-one correspond to the photodiodes and the VCSELs at the receiving end. The multiple VCSELs at the emitting end are arranged in parallel, and one ends thereof are also provided with photodiodes for receiving feedback signals. The focusing lenses of the first focusing lens array one-to-one correspond to the VCSELs and the photodiodes at the emitting end, and the multiple incident faces of the first Z-block-shaped prism one-to-one correspond to the VCSELs and the photodiodes at the emitting end.

Preferably, the emitting end has 3 to 14 VCSELs and at least one photodiode; and the receiving end has 3 to 14 photodiodes and at least one VCSEL.

Preferably, the arrangement spacing between adjacent VCSELs or between adjacent photodiodes or between the VCSEL and the photodiode at the receiving end or emitting end is 0.25 mm to 1 mm.

Preferably, the first focusing lens array at the emitting end and the second focusing lens array at the receiving end are both spherical lenses or aspheric lenses.

Preferably, the first Z-block-shaped prism at the emitting end and the second Z-block-shaped prism at the receiving end each have a thickness of 0.2 mm to 3 mm, and they are arranged obliquely to form an angle of 6° to 45° with the end of the multi-mode optical fiber, the emitting end of the VCSEL, or the receiving end of the PD.

Preferably, the multi-mode optical fiber is a transparent optical fiber, and the core diameter of its fiber core is not less than 0.03 mm.

Preferably, the first focusing lens and the second focusing lens are both spherical lenses or aspheric lenses integrally formed by injection molding, molding, or photolithography.

In an application of a short-waveband active optical component based on a vertical emitting laser and a multi-mode optical fiber as described above, it is used in a high-definition multimedia interface device.

A short-waveband active optical component includes the above short-waveband active optical component based on a vertical emitting laser and a multi-mode optical fiber, and has an operating wavelength of 600 nm to 1000 nm and a wavelength channel interval of 20 nm to 100 nm.

By adopting the above technical solution, the present invention has the following beneficial effects: the present invention uses a multi-channel short-waveband laser and a single multi-mode optical fiber for performing data transmission, which is advantageous in a small size, high transmission rate, low cost, long transmission distance, adjustable length, and the like, thus having a broad commercial prospect.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will be further elaborated below with reference to accompanying drawings and specific implementation manners:

FIG. 1 is a schematic diagram of a brief implementation structure according to Embodiment 1 of the present invention;

FIG. 2 is a schematic brief structural diagram of an emitting end according to Embodiment 1 of the present invention;

FIG. 3 is a schematic brief structural diagram of a receiving end according to Embodiment 1 of the present invention; and

FIG. 4 is a schematic diagram of Z-block-shaped prism gluing pieces at the emitting end and the receiving end according to Embodiment 1 of the present invention.

DETAILED DESCRIPTION

A short-waveband active optical component based on a vertical emitting laser and a multi-mode optical fiber includes an emitting end, a receiving end, and one multi-mode optical fiber;

- the emitting end including multiple VCSELs, a first focusing lens array, a first Z-block-shaped prism, and a first focusing lens that are arranged in sequence, the first Z-block-shaped prism having multiple incident faces and an exit end, and the first focusing lens facing the exit end of the first Z-block-shaped prism;
- the receiving end including multiple photodiodes, a second focusing lens array, a second Z-block-shaped prism, and a second focusing lens that are arranged in sequence, the second Z-block-shaped prism having multiple exit faces and an incident end, and the second focusing lens facing the incident end of the second Z-block-shaped prism; and
- one end of the one multi-mode optical fiber facing the first focusing lens, and the other end facing the second focusing lens;
- wherein,
- the multiple VCSELs are configured to be used for generating multiple optical signals of different wavelengths;
- the multiple photodiodes (PDs) are configured to be used for receiving the optical signals emitted by the VCSELs;
- the first focusing lens array and the second focusing lens array are configured to be used for collimating and focusing optical signals at the emitting end (Tx end) and the receiving end (Rx end);
- the first Z-block-shaped prism and the second Z-block-shaped prism are configured to be used for a light combining (MUX) function of the emitting end (Tx end) of the optical component and a light splitting (DEMUX) function of the receiving end (Rx end); and
- the multi-mode optical fiber (MMF) is configured to be used for transmitting the optical signals generated by the VCSELs.