# US 2021/0278613 A1 · Short-waveband active optical component based on vertical emitting laser and multi-mode optical fiber

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- Number: US 2021/0278613 A1
- Document ID: US20210278613A1
- Status: Published application
- Kind: A1
- Application number: 17/259,401
- Filed: 2018-09-21
- Published: 2021-09-09
- Earliest claimed: 2018-07-14
- Assignees: Fuzho Photop Optics Co., Ltd
- Applicants: Fuzho Photop Optics Co., Ltd
- Inventors: Guanglong YU; Hong HUANG; Zihang WANG
- Web page: https://patentgrep.com/patent/US20210278613A1

## CPC

- G02B 6/4246: {Bidirectionally operating package structures}
- G02B 6/29367: {Zigzag path within a transparent optical block, e.g. filter deposited on an etalon, glass plate, wedge acting as a stable spacer}
- G02B 6/29373: {utilising a bulk dispersive element, e.g. prism}
- G02B 6/2938: {for multiplexing or demultiplexing, i.e. combining or separating wavelengths, e.g. 1xN, NxM}
- G02B 6/43: Arrangements comprising a plurality of opto-electronic elements and associated optical interconnections
- H04B 10/2581: Multimode transmission
- H04B 10/2589: {Bidirectional transmission}
- H04B 10/5057: {using a feedback signal generated by analysing the optical output}
- H04B 10/66: Non-coherent receivers, e.g. using direct detection
- H04J 14/02: Wavelength-division multiplex systems
- H04J 14/04: Mode multiplex systems
- H04B 10/503: {Laser transmitters}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- H04B: TRANSMISSION
- H04J: MULTIPLEX COMMUNICATION (transmission in general H04B; peculiar to transmission of digital information H04L5/00; systems for the simultaneous or sequential transmission of more than one television signal H04N7/08; in exchanges H04Q11/00; stereophonic systems H04S)

## Abstract

A short-waveband active optical component based on a vertical emitting laser and a multi-mode optical fiber (3) is provided. In the component, multiple VCSELs (11) are configured to be used for generating multiple optical signals of different wavelengths; multiple photodiodes (15) are configured to be used for receiving the optical signals emitted by the VCSELs (11); two focusing lens arrays (12, 22) or lens array group elements are configured to be used for collimating and focusing optical signals at an emitting end (1) and a receiving end (2); two Z-block-shaped prisms (13, 23) are configured to be used for a light combining function of the emitting end (1) of the optical component and a light splitting function of the receiving end (2); one multi-mode optical fiber (3) is configured to be used for transmitting the optical signals generated by the VCSELs (11); and two focusing lenses (14, 24) are configured to be used for collimating and focusing optical signals at two ends of the multi-mode optical fiber (3). The short-waveband active optical component has a small size and a high transmission rate.

## Claims

### Claim 1

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

### Claim 2 (depends on 1)

The short-waveband active optical component based on a vertical emitting laser and a multi-mode optical fiber according to claim 1, wherein the multiple photodiodes at the receiving end are arranged in parallel, 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, 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.

### Claim 3 (depends on 2)

The short-waveband active optical component based on a vertical emitting laser and a multi-mode optical fiber according to claim 2, wherein the emitting end has 3 to 14 VCSELs and at least one photodiode; and the receiving end has 3 to 14 light-emitting diodes and at least one VCSEL.

### Claim 4 (depends on 2)

The short-waveband active optical component based on a vertical emitting laser and a multi-mode optical fiber according to claim 2, 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.

### Claim 5 (depends on 2)

The short-waveband active optical component based on a vertical emitting laser and a multi-mode optical fiber according to claim 2, wherein 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.

### Claim 6 (depends on 2)

The short-waveband active optical component based on a vertical emitting laser and a multi-mode optical fiber according to claim 2, wherein 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.

### Claim 7 (depends on 2)

The short-waveband active optical component based on a vertical emitting laser and a multi-mode optical fiber according to claim 2, wherein 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.

### Claim 8 (depends on 2)

The short-waveband active optical component based on a vertical emitting laser and a multi-mode optical fiber according to claim 2, wherein the first focusing lens and the second focusing lens are both spherical lenses or aspheric lenses integrally formed by injection molding, molding, or photolithography.

### Claim 9 (depends on 1)

An application of the short-waveband active optical component based on a vertical emitting laser and a multi-mode optical fiber according to claim 1, wherein it is used in a high-definition multimedia interface device.

### Claim 10 (depends on 1)

A short-waveband active optical component, comprising the short-waveband active optical component based on a vertical emitting laser and a multi-mode optical fiber according to claim 1, wherein an operating wavelength thereof is 600 nm to 1000 nm, and a wavelength channel interval thereof is 20 nm to 100 nm.