Short-waveband active optical components based on vertical-emitting lasers and multimode optical fibers

Abstract

The present invention discloses a short-waveband active optical component based on vertically emitting lasers and multimode optical fibers. In the component, multiple VCSELs are configured to generate multiple optical signals of different wavelengths; multiple photodiodes (PDs) are configured to receive optical signals emitted by the VCSELs; two focusing lens arrays or lens array group elements are configured to collimate and focus optical signals at the transmitting end (Tx end) and the receiving end (Rx end); two Z-block prisms are configured to perform the light combining (MUX) function at the Tx end and the light splitting (DEMUX) function at the Rx end of the optical component; a multimode fiber (MMF) is configured to transmit the optical signals generated by the VCSELs; and two focusing lenses are configured to collimate and focus optical signals at both ends of the MMF. The implementation structure of the solution of the present invention has the advantages of small size, high transmission rate, low cost, long transmission distance, and adjustable length, and has broad commercial prospects.

Description

Technical Field

[0001] The present invention relates to the fields of communication optics and data transmission, and in particular to a shortwave band active optical component based on a vertically emitting laser and a multimode optical fiber, which can be used to implement shortwave wavelength division multiplexing (SWDM) functions in near- and medium-range high-definition multimedia interface (HDMI) devices. Background Art

[0002] High-Definition Multimedia Interface (HDMI) technology is a fast data transmission technology widely used in optical communications. Currently, HDMI devices have short transmission distances, low transmission rates, and cannot be adjusted to meet installation requirements. This makes them increasingly unable to meet the requirements of modern large-scale (≥ 4K) data transmission.

[0003] This patent is based on short-wavelength VCSEL laser signal light source and optical fiber transmission technology, and derives a new type of active optical component that can achieve high-speed transmission of data signals over long distances and can arbitrarily adjust the length of the data line according to actual installation requirements. Summary of the Invention

[0004] In view of the existing technology, the purpose of the present invention is to provide a short-wave band active optical component based on vertical emitting lasers and multimode optical fibers, which has low cost, small size, high transmission rate and can realize the SWDM function in short- and medium-range HDMI devices.

[0005] In order to achieve the above technical objectives, the technical solution adopted by the present invention is:

[0006] A short-waveband active optical component based on a vertically emitting laser and a multimode optical fiber, comprising a transmitting end, a receiving end and a multimode optical fiber;

[0007] The transmitting end includes a plurality of VCSELs, a first focusing lens array, a first Z-block prism and a first focusing lens arranged in sequence, wherein the first Z-block prism has a plurality of incident surfaces and an output end, and the first focusing lens is opposite to the output end of the first Z-block prism;

[0008] The receiving end includes a plurality of photodiodes, a second focusing lens array, a second Z-block prism, and a second focusing lens arranged in sequence, wherein the second Z-block prism has a plurality of exit surfaces and an incident end, and the second focusing lens is opposite to the incident end of the second Z-block prism;

[0009] One end of the multimode optical fiber is opposite to the first focusing lens, and the other end thereof is opposite to the second focusing lens;

[0010] in,

[0011] The plurality of VCSELs are configured to generate optical signals of a plurality of different wavelengths;

[0012] The plurality of photodiodes (PDs) are configured to receive optical signals emitted by the VCSEL;

[0013] The first focusing lens array and the second focusing lens array are configured to collimate and focus optical signals at a transmitting end (Tx end) and a receiving end (Rx end);

[0014] The first Z-block prism and the second Z-block prism are configured to perform a light combining (MUX) function at a transmitting end (Tx end) of the optical component and a light splitting (DEMUX) function at a receiving end (Rx end);

[0015] The multimode optical fiber (MMF) is configured to transmit the optical signal generated by the VCSEL.

[0016] In addition, the output end and the input end can also be encapsulated by a shell respectively.

[0017] When the multiple VCSELs at the transmitting end emit laser signals into the first focusing lens array, the first focusing lens array focuses the optical signals and injects them into the multiple incident surfaces of the first Z-block prism. The output end of the first Z-block prism then emits the received optical signals to the first focusing lens, causing the first focusing lens to input the optical signal into one end of the multimode optical fiber. The multimode optical fiber transmits the optical signal to its other end and emits it to the second focusing lens. The second focusing lens then injects the optical signal into the incident end of the second Z-block prism. The second Z-block prism then injects the signal light from its multiple output surfaces into the second focusing lens array, causing the second focusing lens array to focus the optical signal onto the multiple photodiodes opposite it.

[0018] Furthermore, the multiple photodiodes at the receiving end are arranged in parallel and one end thereof is also provided with a VCSEL for sending feedback signals, the focusing lenses of the second focusing lens array correspond one-to-one to the photodiodes and VCSELs at the receiving end, and the multiple exit surfaces of the second Z-block prism correspond one-to-one to the photodiodes and VCSELs at the receiving end; the multiple VCSELs at the transmitting end are arranged in parallel and one end thereof is also provided with a photodiode for receiving feedback signals, the focusing lenses of the first focusing lens array correspond one-to-one to the VCSELs and photodiodes at the transmitting end, and the multiple incident surfaces of the first Z-block prism correspond one-to-one to the VCSELs and photodiodes at the transmitting end.

[0019] Preferably, the transmitting end has 3 to 14 VCSELs and at least one photodiode; the receiving end has 3 to 14 light-emitting diodes and at least one VCSEL.

[0020] Preferably, the arrangement spacing between adjacent VCSELs or between adjacent photodiodes or between a VCSEL and a photodiode at the receiving end or the transmitting end is 0.25-1 mm.

[0021] Preferably, the first focusing lens array at the transmitting end and the second focusing lens array at the receiving end are both spherical lenses or aspherical lenses.

[0022] Preferably, the thickness of the first Z-block prism at the transmitting end and the second Z-block prism at the receiving end are both 0.2 to 3 mm, and they are tilted at an angle of 6° to 45° to the end of the multimode optical fiber, the transmitting end of the VCSEL or the receiving end of the PD.

[0023] Preferably, the multimode optical fiber is a transparent optical fiber, and the core diameter of the optical fiber is not less than 0.03 mm.

[0024] Preferably, the first focusing lens and the second focusing lens are both spherical lenses or aspherical lenses integrally formed by injection molding, molding or photolithography.

[0025] The above-mentioned short-wave band active optical component based on vertical emitting laser and multimode optical fiber is used in high-definition multimedia interface devices.

[0026] A shortwave band active optical component comprises the above-mentioned shortwave band active optical component based on a vertically emitting laser and a multimode optical fiber, with an operating wavelength of 600 to 1000 nm and a wavelength channel spacing of 20 to 100 nm.

[0027] By adopting the above technical solution, the present invention has the following beneficial effects: the present invention adopts multi-channel short-wave band laser and single multimode optical fiber for data transmission, and has the advantages of small size, high transmission rate, low cost, long transmission distance, adjustable length, etc., and has broad commercial prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0029] Figure 1 This is a schematic diagram of the implementation structure of Example 1 of the present invention;

[0030] Figure 2 This is a schematic diagram of the structure of the transmitter according to Embodiment 1 of the present invention;

[0031] Figure 3This is a schematic diagram of the structure of a receiving end according to Embodiment 1 of the present invention;

[0032] Figure 4 The figure is a brief diagram of the Z-block prism bonding parts of the transmitting end and the receiving end of Example 1 of the present invention. DETAILED DESCRIPTION

[0033] A short-waveband active optical component based on a vertically emitting laser and a multimode optical fiber, comprising a transmitting end, a receiving end and a multimode optical fiber;

[0034] The transmitting end includes a plurality of VCSELs, a first focusing lens array, a first Z-block prism and a first focusing lens arranged in sequence, wherein the first Z-block prism has a plurality of incident surfaces and an output end, and the first focusing lens is opposite to the output end of the first Z-block prism;

[0035] The receiving end includes a plurality of photodiodes, a second focusing lens array, a second Z-block prism, and a second focusing lens arranged in sequence, wherein the second Z-block prism has a plurality of exit surfaces and an incident end, and the second focusing lens is opposite to the incident end of the second Z-block prism;

[0036] One end of the multimode optical fiber is opposite to the first focusing lens, and the other end thereof is opposite to the second focusing lens;

[0037] in,

[0038] The plurality of VCSELs are configured to generate optical signals of a plurality of different wavelengths;

[0039] The plurality of photodiodes (PDs) are configured to receive optical signals emitted by the VCSEL;

[0040] The first focusing lens array and the second focusing lens array are configured to collimate and focus optical signals at a transmitting end (Tx end) and a receiving end (Rx end);

[0041] The first Z-block prism and the second Z-block prism are configured to perform a light combining (MUX) function at a transmitting end (Tx end) of the optical component and a light splitting (DEMUX) function at a receiving end (Rx end);

[0042] The multimode optical fiber (MMF) is configured to transmit the optical signal generated by the VCSEL.

[0043] In addition, the output end and the input end can also be encapsulated by a shell respectively.

[0044] When the multiple VCSELs at the transmitting end emit laser signals into the first focusing lens array, the first focusing lens array focuses the optical signals and injects them into the multiple incident surfaces of the first Z-block prism. The output end of the first Z-block prism then emits the received optical signals to the first focusing lens, causing the first focusing lens to input the optical signal into one end of the multimode optical fiber. The multimode optical fiber transmits the optical signal to its other end and emits it to the second focusing lens. The second focusing lens then injects the optical signal into the incident end of the second Z-block prism. The second Z-block prism then injects the signal light from its multiple output surfaces into the second focusing lens array, causing the second focusing lens array to focus the optical signal onto the multiple photodiodes opposite it.

[0045] Furthermore, the multiple photodiodes at the receiving end are arranged in parallel and one end thereof is also provided with a VCSEL for sending feedback signals, the focusing lenses of the second focusing lens array correspond one-to-one to the photodiodes and VCSELs at the receiving end, and the multiple exit surfaces of the second Z-block prism correspond one-to-one to the photodiodes and VCSELs at the receiving end; the multiple VCSELs at the transmitting end are arranged in parallel and one end thereof is also provided with a photodiode for receiving feedback signals, the focusing lenses of the first focusing lens array correspond one-to-one to the VCSELs and photodiodes at the transmitting end, and the multiple incident surfaces of the first Z-block prism correspond one-to-one to the VCSELs and photodiodes at the transmitting end.

[0046] Preferably, the transmitting end has 3 to 14 VCSELs and at least one photodiode; the receiving end has 3 to 14 light-emitting diodes and at least one VCSEL.

[0047] Preferably, the arrangement spacing between adjacent VCSELs or between adjacent photodiodes or between a VCSEL and a photodiode at the receiving end or the transmitting end is 0.25-1 mm.

[0048] Preferably, the first focusing lens array at the transmitting end and the second focusing lens array at the receiving end are both spherical lenses or aspherical lenses.

[0049] Preferably, the thickness of the first Z-block prism at the transmitting end and the second Z-block prism at the receiving end are both 0.2 to 3 mm, and they are tilted at an angle of 6° to 45° to the end of the multimode optical fiber, the transmitting end of the VCSEL or the receiving end of the PD.

[0050] Preferably, the multimode optical fiber is a transparent optical fiber, and the core diameter of the optical fiber is not less than 0.03 mm.

[0051] Preferably, the first focusing lens and the second focusing lens are both spherical lenses or aspherical lenses integrally formed by injection molding, molding or photolithography.

[0052] The above-mentioned short-wave band active optical component based on vertical emitting laser and multimode optical fiber is used in high-definition multimedia interface devices.

[0053] A shortwave band active optical component comprises the above-mentioned shortwave band active optical component based on a vertically emitting laser and a multimode optical fiber, with an operating wavelength of 600 to 1000 nm and a wavelength channel spacing of 20 to 100 nm.

[0054] Example 1

[0055] like Figure 1 As shown, the present invention includes a transmitting end 1, a receiving end 2 and a multimode optical fiber 3;

[0056] like Figure 2 As shown in the figure, it shows a brief implementation structure of the transmitter (TX end module) of the structure of Example 1 of the present invention, which is a 6-channel Tx end module, which includes five VCSELs 11, one photodiode 15, a first focusing lens array 12, a first Z-block prism 13 and a first focusing lens 14 arranged in sequence. The first Z-block prism 13 has six incident surfaces and an output end. The first focusing lens 14 is opposite to the output end of the first Z-block prism 13, and one end of the multimode optical fiber 3 is opposite to the first focusing lens 14; the one photodiode 15 and the five VCSELs 11 are arranged in parallel, and the part of the first Z-block prism 13 corresponding to the incident surface from its output end to its other end is block1, block2, block3, block4, block5 and block6 in sequence, and the block6 is opposite to the first focusing lens 14 and the photodiode 15 in sequence.

[0057] The specific workflow is as follows: Laser light emitted by five channels of VCSEL 11 (730 ±10 nm, 760 ±10 nm, 790 ±10 nm, 825 ±10 nm, and 850 ±10 nm) is collimated by the first focusing lens array 12 and then enters the first Z-block prism 13 through the left broadband anti-reflection coating. The laser light first hits block 5, then undergoes multiple reflections from block 4 to block 1, and finally emerges from the anti-reflection coating on block 1. It is then coupled into multimode fiber 3 through the first focusing lens 14. Similarly, the laser light passing through blocks 4 to 1 is coupled into multimode fiber 3 one by one by the first focusing lens 14, thus achieving the MUX function. The feedback laser signal (730 ±10 nm) emitted from the multimode fiber 3 (MMF) (i.e., the output end) is collimated by the first focusing lens and hits block 1. After reflection, it enters block 2, and then enters block 6 after multiple reflections from block 2 to block 5. Finally, after exiting block 6, it enters the first focusing lens array 12 and is finally focused on PD 6, so that the feedback signal is collected.

[0058] like Figure 3 As shown, it shows the brief implementation structure of the receiving end (RX end module) of the structure of embodiment 1 of the present invention, which corresponds to Figure 2 The implementation structure is a 6-channel Rx-end module, which includes a VCSEL 25, five photodiodes 21 (i.e., PDs), a second focusing lens array 22, a second Z-block prism 23, and a second focusing lens 24, which are arranged in sequence. The second Z-block prism 23 has six exit surfaces and an incident end, and the second focusing lens 24 is opposite the incident end of the second Z-block prism 23; the other end of the multimode optical fiber 3 is opposite the second focusing lens 24; the photoelectric secondary light 21 and the one VCSEL 25 are arranged in parallel, and the corresponding parts of the second Z-block prism 23 from its incident end to its other end are block1', block2', block3', block4', block5', and block6', respectively. The block6' is opposite the second focusing lens 14 and VCSEL 25 in sequence.

[0059] The specific workflow is as follows: the five-band laser signals (730 ±10 nm, 750 ±10 nm, 770 ±10 nm, 790 ±10 nm, and 810 ±10 nm) emitted from the multimode fiber 3 (i.e., MMF) are collimated by the second focusing lens 24 and hit block 1'. After reflection, they enter block 2', then pass through blocks 2' to 5' and enter the second focusing lens array 22. Finally, they are focused on PD1 to PD5 (i.e., the corresponding five photodiodes 21). The feedback laser signal (730 ±10 nm) emitted by the VCSEL 25 is collimated by the first focusing lens array 22 and then enters the Z-block prism 23 through the broadband anti-reflection coating. The laser first hits block 5', then undergoes multiple reflections from blocks 4' to 1', and finally exits from the anti-reflection coating surface of block 1' (i.e., the incident end). It is focused and coupled by the second focusing lens 24 and enters the multimode fiber 3.

[0060] In this embodiment, the manufacturing method of the first Z-block prism or the second Z-block prism briefly includes the following steps:

[0061] 1. Prism Design & Processing: Prism size and thickness are designed based on the requirements of different channels (including channel number and channel spacing). Using optical cold working, the parallelism, thickness, and angle of the prism are strictly controlled. Finally, regional coating (broadband anti-reflection coating + broadband high-reflection coating) is performed.

[0062] 2. Filter Design and Processing: Filters are the core components for spectroscopic analysis. Using coating design software, filters are designed based on the requirements of different channels. Key design considerations are the flatness of the coating curve and the shift in the center wavelength. Filters are typically coated on a substrate (wafer) with good parallelism and surface shape, then cut, inspected, and selected for use.

[0063] 3. Assemble the components: Fit the above prisms and filters together to obtain Figure 4 For the structure shown, pay attention to controlling the consistency of the adhesive layer during the bonding process, and avoid air bubbles, misalignment and other adverse phenomena.

[0064] The above are embodiments of the present invention. For ordinary technicians in this field, based on the teachings of the present invention, all equivalent changes, modifications, substitutions and variations made within the scope of the patent application of the present invention without departing from the principles and spirit of the present invention should be covered by the scope of the present invention.

Claims

1. A short-wavelength active optical component based on a vertically emitting laser and a multimode optical fiber, characterized by: It includes a transmitter, a receiver and a multimode optical fiber; The transmitting end includes a plurality of VCSELs, a first focusing lens array, a first Z-block prism and a first focusing lens arranged in sequence, wherein the first Z-block prism has a plurality of incident surfaces and an output end, and the first focusing lens is opposite to the output end of the first Z-block prism; The receiving end includes a plurality of photodiodes, a second focusing lens array, a second Z-block prism, and a second focusing lens arranged in sequence, wherein the second Z-block prism has a plurality of exit surfaces and an incident end, and the second focusing lens is opposite to the incident end of the second Z-block prism; One end of the multimode optical fiber is opposite to the first focusing lens, and the other end thereof is opposite to the second focusing lens; After the multiple VCSELs at the transmitting end inject laser signals into the first focusing lens array, the first focusing lens array focuses the optical signals and injects them into the multiple incident surfaces of the first Z-block prism. The output end of the first Z-block prism then emits the received optical signals to the first focusing lens. The first focusing lens inputs the optical signal into one end of the multimode optical fiber. The multimode optical fiber transmits the optical signal to the other end and emits it to the second focusing lens. The second focusing lens then injects the optical signal into the incident end of the second Z-block prism. The second Z-block then injects the signal light from its multiple output surfaces into the second focusing lens array. The second focusing lens array focuses the optical signal onto the multiple photodiodes opposite to it. The multiple photodiodes at the receiving end are arranged in parallel and one end of each is further provided with a VCSEL for sending a feedback signal, the focusing lens of the second focusing lens array corresponds one-to-one with the photodiode and VCSEL at the receiving end, and the multiple exit surfaces of the second Z-block prism correspond one-to-one with the photodiode and VCSEL at the receiving end; the multiple VCSELs at the transmitting end are arranged in parallel and one end of each is further provided with a photodiode for receiving a feedback signal, the focusing lens of the first focusing lens array corresponds one-to-one with the VCSEL and photodiode at the transmitting end, and the multiple incident surfaces of the first Z-block prism correspond one-to-one with the VCSEL and photodiode at the transmitting end; the thickness of the first Z-block prism at the transmitting end and the second Z-block prism at the receiving end are both 0.2 to 3 mm, and they are inclined at an angle of 6° to 45° to the end of the multimode optical fiber, the transmitting end of the VCSEL or the receiving end of the PD; The transmitting end has 3 to 14 VCSELs and at least one photodiode; the receiving end has 3 to 14 light-emitting diodes and at least one VCSEL; The operating wavelength of the short-wave band active optical components is 600 to 1000 nm, and the wavelength channel spacing is 20 to 100 nm.

2. The short-wavelength active optical component based on a vertically emitting laser and a multimode optical fiber according to claim 1, characterized in that: The arrangement spacing between adjacent VCSELs or adjacent photodiodes or between a VCSEL and a photodiode at the receiving end or the transmitting end is 0.25 to 1 mm.

3. The short-wavelength active optical component based on a vertically emitting laser and a multimode optical fiber according to claim 1, characterized in that: The first focusing lens array at the transmitting end and the second focusing lens array at the receiving end are both spherical lenses or aspherical lenses.

4. The short-wavelength active optical component based on a vertically emitting laser and a multimode optical fiber according to claim 1, characterized in that: The multimode optical fiber is a transparent optical fiber, and the core diameter of the optical fiber is not less than 0.03 mm.

5. The short-waveband active optical component based on a vertically emitting laser and a multimode optical fiber according to claim 1, characterized in that: The first focusing lens and the second focusing lens are both spherical lenses or aspherical lenses formed in one piece by injection molding, molding or photolithography.

6. Application of a short-wavelength active optical component based on a vertically emitting laser and a multimode optical fiber according to any one of claims 1 to 5, characterized in that: It is used in high-definition multimedia interface devices.

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