Two-path receiving and transmitting integrated low-speed optical module

Abstract

The invention discloses a two-path receiving and transmitting integrated low-speed optical module, which comprises a printed board, and a pin header type electric connector is welded on the printed board. A buffer, a VCSEL (Vertical Cavity Surface Emitting Laser) and a light receiving chip are pasted and bonded on the printed board; the printed board is coupled and connected with an optical fiber array, a tail optical fiber of the optical fiber array is connected with an MT optical fiber connector, and the MT optical fiber connector extends out of the printed board; the optical fiber array is coupled according to corresponding channels of the VCSEL laser and the optical receiving chip, and after coupling, the optical fiber is changed to be connected with the MT optical fiber connector. According to the invention, the optical module with very low delay is adopted for transmission, so that the system has the characteristic of low delay, can meet the application scene with high real-time performance, and also has the advantages of high stability, energy conservation, environmental protection and the like.

Description

Technical Field

[0001] The present invention belongs to the technical field of optical modules, and in particular relates to a two-way transceiver integrated low-speed optical module. Background Art

[0002] At present, in the fields of aviation, shipping, etc., clock signals and control signals are mostly transmitted using low-frequency cables. However, low-frequency cables are not only costly and heavy, but also have large transmission losses and poor anti-interference capabilities, making them very inconvenient to use. In addition, there is no mature integrated solution for low-speed optical transmission (DC-20Mbps) on the market. Even if discrete devices are used for synthesis, there are still problems with poor low-frequency transmission effect and poor stability. Summary of the invention

[0003] The present invention aims at solving the problems in the prior art and proposes the following technical solutions:

[0004] A two-way transceiver integrated low-speed optical module, comprising a printed board, a pin-type electrical connector is welded on the printed board; a buffer, a VCSEL laser and an optical receiving chip are bonded to the printed board; an optical fiber array is coupled and connected on the printed board, and the tail optical fiber of the optical fiber array is connected to an MT optical fiber connector, and the MT optical fiber connector extends out of the printed board;

[0005] The optical fiber array is coupled according to the corresponding channels of the VCSEL laser and the optical receiving chip, and after coupling, the optical fiber is modified and connected to the MT optical fiber connector.

[0006] As a preferred embodiment of the above technical solution, the printed board is a single-sided PCB board, and the pin-type electrical connector, buffer, VCSEL laser, light receiving chip, optical fiber array and ESD protection chip are all installed on the component surface of the printed board.

[0007] As a preferred embodiment of the above technical solution, a shell is glued to the component surface of the printed circuit board, a groove is provided on the shell, and the optical fiber array and the optical fiber connecting part of the MT optical fiber connector match the groove.

[0008] As a preferred embodiment of the above technical solution, an ESD protection chip is welded on the component surface of the printed circuit board.

[0009] As a preferred embodiment of the above technical solution, the pin-header type electrical connector includes a GNDR pin, a GNDT pin, an RSSI_1 pin, an RSSI_2 pin, an OUT_1 pin, an OUT_2 pin, an IN_2 pin, an IN_1 pin, a DNC pin, a DNC pin, a VCCT pin and a VCCR pin.

[0010] As a preferred embodiment of the above technical solution, the GNDR pin is used for grounding the receiving part, the OUT_1 pin and the OUT_2 pin are used for receiving part data output, the RSSI_1 pin and the RSSI_2 pin are used for receiving part received optical power monitoring, the VCCR pin is used for receiving part positive power supply, the VCCT pin is used for sending part positive power supply, the IN_1 pin and the IN_2 pin are used for sending part data input, and the GNDT pin is used for sending part grounding pin.

[0011] As a preferred embodiment of the above technical solution, the levels of the OUT_1 pin, OUT_2 pin, RSSI_1 pin, RSSI_2 pin, IN_1 pin, and IN_2 pin are all LVTTL.

[0012] As a preferred embodiment of the above technical solution, the receiving positive power supply and the transmitting positive power supply of the VCCR pin and the VCCT pin are both +3.3V.

[0013] As a preferred embodiment of the above technical solution, the operating temperature of the printed circuit board is -55°C to +120°C.

[0014] The beneficial effects of the present invention are:

[0015] The two-way transceiver integrated low-speed optical module of the present invention adopts an optical module with very low delay for transmission, so it has the characteristics of low latency and can meet the application scenarios with high real-time performance. Secondly, a highly integrated circuit is adopted to make the performance more stable, and the transmission signal of the optical module is not affected by electromagnetic interference and has high stability. In addition, due to the integration of the circuit, the reliability of the equipment is greatly improved, the production process is simple, and the work efficiency is improved. Compared with traditional cable transmission, it has lower energy consumption and smaller floor space, so it is more energy-saving and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the three-dimensional structure of a two-way transceiver integrated optical module proposed by the present invention;

[0017] Figure 2 A pin diagram of a two-way transceiver integrated optical module proposed by the present invention;

[0018] Figure 3 The present invention provides a two-way transceiver integrated optical module.

[0019] In the figure: 1. Printed circuit board; 2. Pin-type electrical connector; 201. GNDR pin; 202. GNDT pin; 203. RSSI_1 pin; 204. RSSI_2 pin; 205. OUT_1 pin; 206. OUT_2 pin; 207. IN_2 pin; 208. IN_1 pin; 209. DNC pin; 2010. DNC pin; 2011. VCCT pin; 2012. VCCR pin; 3. Buffer; 4. VCSEL laser; 5. Optical receiving chip; 6. Optical fiber array; 7. ESD protection chip; 8. MT optical fiber connector; 9. Housing. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0021] Example

[0022] like Figure 1 As shown, a two-way transceiver integrated low-speed optical module includes a printed board 1, on which a pin-type electrical connector 2 is welded; a buffer 3, a VCSEL laser 4 and an optical receiving chip 5 are bonded and mounted on the printed board 1; an optical fiber array 6 is coupled and connected to the printed board 1, and the tail optical fiber of the optical fiber array 6 is connected to an MT optical fiber connector 8, and the MT optical fiber connector 8 extends out of the printed board 1;

[0023] The optical fiber array 6 is coupled according to the corresponding channels of the VCSEL laser 4 and the optical receiving chip 5 , and after coupling, the optical fiber is re-fibered and connected to the MT optical fiber connector 8 .

[0024] It should be noted that the levels of OUT_1 pin 205, OUT_2 pin 206, RSSI_1 pin 203, RSSI_2 204, IN_1 pin 208, and IN_2 pin 207 are all LVTTL.

[0025] The working principle of the two-way transceiver integrated low-speed optical module of the present invention is as follows: the LVTTL level signal input by the pin-type electrical connector 2 is converted into a suitable high-speed current signal by the buffer 3, and then drives the VCSEL laser 4 to emit an optical signal, which is output by the MT optical fiber connector 8. At the same time, the optical receiving chip 5 converts the optical signal received from the MT optical fiber connector 8 into an electrical signal, which is amplified and filtered before being output to the pin-type electrical connector 2.

[0026] The two-way transceiver integrated low-speed optical module of the present invention adopts an optical module with very low delay for transmission, so it has the characteristics of low latency and can meet the application scenarios with high real-time performance. Secondly, a highly integrated circuit is adopted to make the performance more stable, and the transmission signal of the optical module is not affected by electromagnetic interference and has high stability. In addition, due to the integration of the circuit, the reliability of the equipment is greatly improved, the production process is simple, and the work efficiency is improved. Compared with traditional cable transmission, it has lower energy consumption and smaller floor space, so it is more energy-saving and environmentally friendly.

[0027] In this embodiment, the printed board 1 is a single-sided PCB board, and the pin-type electrical connector 2, buffer 3, VCSEL laser 4, optical receiving chip 5, optical fiber array 6 and ESD protection chip 7 are all installed on the component surface of the printed board 1. The single-sided PCB board has good overall flatness and is easier to install the optical module; in actual applications, the printed board 1 can use a double-sided PCB board, which is more integrated and smaller in size than a single-sided PCB board, but has a relative thickness greater than a single-sided PCB board, and can be selected according to the actual installation environment.

[0028] The component surface of the printed circuit board 1 is glued with a housing 9, and a groove is formed on the housing 9, and the optical fiber connection parts of the optical fiber array 6 and the MT optical fiber connector 8 match the groove. The housing 9 is provided to prevent dust and water. In this embodiment, a single-sided PCB board is used, and the housing 9 is made of Figure 1 The cover shape shown is sufficient. If the printed circuit board 1 adopts a double-sided PCB board, the shape of the shell 9 can be changed according to the actual situation to match it.

[0029] The component surface of the printed circuit board 1 is welded with an ESD protection chip 7. The ESD protection chip 7 plays a role in circuit protection and improves the durability of the optical module of the present invention.

[0030] The pin header type electrical connector 2 comprises a GNDR pin 201, a GNDT pin 202, an RSSI_1 pin 203, an RSSI_2204, an OUT_1 pin 205, an OUT_2 pin 206, an IN_2 pin 207, an IN_1 pin 208, a DNC pin 209, a DNC pin 2010, a VCCT pin 2011 and a VCCR pin 2012. The GNDR pin 201 is used for grounding the receiving part, the OUT_1 pin 205 and the OUT_2 pin 206 are used for data output of the receiving part, the RSSI_1 pin 203 and the RSSI_2204 are used for receiving optical power monitoring of the receiving part, the VCCR pin 2012 is used for positive power supply of the receiving part, the VCCT pin 2011 is used for positive power supply of the sending part, the IN_1 pin 208 and the IN_2 pin 207 are used for data input of the sending part, and the GNDT pin 202 is used for grounding the sending part. As the preferred embodiment of the above technical solution, the receiving positive power supply and the transmitting positive power supply of the VCCR pin 2012 and the VCCT pin 2011 are both +3.3 V. The operating temperature of the printed circuit board 1 is -55°C to +120°C.

[0031] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. A two-way low-speed optical transceiver module, comprising a printed circuit board (1), characterized in that: A pin-type electrical connector (2) is welded on the printed board (1); a buffer (3), a VCSEL laser (4) and a light receiving chip (5) are bonded and mounted on the printed board (1); an optical fiber array (6) is coupled and connected to the printed board (1); the tail optical fiber of the optical fiber array (6) is connected to an MT optical fiber connector (8), and the MT optical fiber connector (8) extends out of the printed board (1); The optical fiber array (6) is coupled according to the corresponding channels of the VCSEL laser (4) and the optical receiving chip (5), and after coupling, the optical fiber is modified and connected to the MT optical fiber connector (8).

2. A two-way low-speed optical module for transmitting and receiving according to claim 1, characterized in that: The printed board (1) is a single-sided PCB board, and the pin-type electrical connector (2), buffer (3), VCSEL laser (4), light receiving chip (5), optical fiber array (6) and ESD protection chip (7) are all mounted on the component surface of the printed board (1).

3. A two-way low-speed optical module for transmitting and receiving according to claim 2, characterized in that: A shell (9) is glued to the component surface of the printed board (1), a groove is provided on the shell (9), and the optical fiber connection parts of the optical fiber array (6) and the MT optical fiber connector (8) match the groove.

4. The two-way transceiver integrated low-speed optical module according to claim 2, characterized in that: An ESD protection chip (7) is welded on the component surface of the printed circuit board (1).

5. The two-way transceiver integrated low-speed optical module according to claim 1, characterized in that: The pin header type electrical connector (2) comprises a GNDR pin (201), a GNDT pin (202), an RSSI_1 pin (203), an RSSI_2 (204), an OUT_1 pin (205), an OUT_2 pin (206), an IN_2 pin (207), an IN_1 pin (208), a DNC pin (209), a DNC pin (2010), a VCCT pin (2011) and a VCCR pin (2012).

6. A two-way transceiver integrated low-speed optical module according to claim 5, characterized in that: The GNDR pin (201) is used for receiving part grounding, the OUT_1 pin (205) and the OUT_2 pin (206) are used for receiving part data output, the RSSI_1 pin (203) and the RSSI_2 pin (204) are used for receiving part received optical power monitoring, the VCCR pin (2012) is used for receiving part positive power, the VCCT pin (2011) is used for sending part positive power, the IN_1 pin (208) and the IN_2 pin (207) are used for sending part data input, and the GNDT pin (202) is used for sending part grounding pin.

7. The two-way transceiver integrated low-speed optical module according to claim 5, characterized in that: The levels of the OUT_1 pin (205), the OUT_2 pin (206), the RSSI_1 pin (203), the RSSI_2 (204), the IN_1 pin (208), and the IN_2 pin (207) are all LVTTL.

8. The two-way transceiver integrated low-speed optical module according to claim 5, characterized in that: The receiving positive power supply and the transmitting positive power supply of the VCCR pin (2012) and the VCCT pin (2011) are both +3.3V.

9. The two-way transceiver integrated low-speed optical module according to claim 1, characterized in that: The working temperature of the printed circuit board (1) is -55°C to +120°C.

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