CN210958657U - Local side equipment of optical fiber network - Google Patents
Local side equipment of optical fiber network Download PDFInfo
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- CN210958657U CN210958657U CN202020119261.6U CN202020119261U CN210958657U CN 210958657 U CN210958657 U CN 210958657U CN 202020119261 U CN202020119261 U CN 202020119261U CN 210958657 U CN210958657 U CN 210958657U
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- optical fiber
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Abstract
The utility model discloses a fiber network's office end equipment, including backplate, the main control board, business board and optical module, backplate and main control board electricity are connected, backplate and business board electricity are connected, optical module and main control board electricity are connected, the optical module includes drive chip, transmitting circuit, receiving circuit, optical fiber circulator and reflection amplifier, transmitting circuit's signal input part is connected with the drive chip electricity, receiving circuit's electric signal output part is connected with the drive chip electricity, optical fiber circulator's first port is connected with transmitting circuit's light signal output part, optical fiber circulator's second port and reflection amplifier both way junction; the utility model discloses a first port of circulator is connected with transmitting circuit's optical signal output end, and the second port and the reflection amplifier both way junction of circulator, optical signal export to transmission optical fiber from the third port of circulator, realize optical signal's enlargies, have improved optical line terminal's transmission distance.
Description
Technical Field
The utility model relates to an optical fiber communication equipment technical field, concretely relates to optical fiber network's local side equipment.
Background
With the development of computers, optical fiber transmission data is widely applied, the transmission speed is greatly increased, and the optical fiber transmission data plays a great role in life and military affairs.
In the PON (passive optical network) technology, a passive optical network includes an OLT (optical line terminal) and an ONU (optical network unit), and the main function of the OLT includes 1, transmitting ethernet data to the ONU (optical network unit) in a broadcast manner; 2. initiating and controlling a ranging process, and recording ranging information; 3. allocating bandwidth for the ONU; namely, the initial time and the size of a sending window of the ONU sending data are controlled; in order to increase the effective transmission distance of the OLT, the equipment of the OLT needs to be improved.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a fiber network's office end equipment has improved optical line terminal's transmission distance effectively through the mode that increases optical signal.
The utility model adopts the technical proposal that:
a local side device of an optical fiber network comprises a back plate, a main control plate and a service plate, wherein the back plate is electrically connected with the main control plate, the back plate is electrically connected with the service plate, the local side device further comprises an optical module, the optical module is respectively electrically connected with the main control plate and the service plate, the optical module comprises a driving chip, a transmitting circuit, a receiving circuit, an optical fiber circulator and a reflection amplifier, the signal input end of the transmitting circuit is electrically connected with the signal output end of the driving chip, the electrical signal output end of the receiving circuit is electrically connected with the main control plate, the output end of the service plate is electrically connected with the signal input end of the driving chip, the first port of the optical fiber circulator is connected with the optical signal output end of the transmitting circuit, the second port of the optical fiber circulator is bidirectionally connected with the reflection amplifier, and the third port of the optical fiber circulator is connected with a transmission fiber, the receiving circuit is used for receiving the optical fiber signal of the transmission optical fiber, and the third port of the optical fiber circulator is used for outputting the optical fiber signal to the transmission optical fiber.
The emitting circuit comprises a light emitting diode D1, a first resistor R1, a second resistor R2, a third resistor R3, a capacitor C1, a magnetic core inductor L1 and a capacitor C1, one end of the first resistor R1 is connected with a power supply, the other end of the first resistor R1 is connected with an OUT-pin of a driving chip, the anode of the light emitting diode D1 is connected with the power supply, the cathode of the light emitting diode D1 is grounded after sequentially passing through a resistor R3 and the capacitor C1, one end of the second resistor R2 is connected with the cathode of the light emitting diode D1, the other end of the second resistor R2 is connected with an OUT + pin of the driving chip, one end of the magnetic core inductor L1 is connected with the cathode of the light emitting diode D1, and the other end of the magnetic core inductor L1 is connected with a BIAS pin of the driving chip.
The receiving circuit comprises a photoelectric chip, a capacitor and a photosensitive diode, wherein the anode of the photosensitive diode is connected with an IPhoto pin of the photoelectric chip, the cathode of the photosensitive diode is connected with the anode of the capacitor, the cathode of the capacitor is grounded, and the OUT pin of the photoelectric chip is connected with a signal pin of the main control board.
Compared with the prior art, the utility model discloses a first port of optical fiber circulator with transmitting circuit's light signal output end connects, the second port of optical fiber circulator with reflection amplifier both way junction, optical fiber signal export to transmission optical fiber from the third port of optical fiber circulator, realize optical fiber signal's enlargies, have improved optical line terminal's transmission distance effectively.
Drawings
Fig. 1 is a block diagram of a local side device of an optical fiber network according to the present invention;
fig. 2 is a block diagram of a reflection amplifier according to an embodiment of the present invention;
fig. 3 is a front view of a service board in an embodiment of the invention;
fig. 4 is a circuit schematic diagram of a transmit circuit in an embodiment of the invention;
fig. 5 is a circuit diagram of a receiving circuit in an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, embodiment 1 of the present invention provides a local side device of an optical fiber network, including a back plate, a main control board and a service board, where the back plate is electrically connected to the main control board, the back plate is electrically connected to the service board, the local side device further includes an optical module, the optical module is electrically connected to the main control board and the service board, the optical module includes a driving chip, a transmitting circuit, a receiving circuit, an optical fiber circulator and a reflection amplifier, a signal input end of the transmitting circuit is electrically connected to a signal output end of the driving chip, an electrical signal output end of the receiving circuit is electrically connected to the main control board, an output end of the service board is electrically connected to a signal input end of the driving chip, a first port of the optical fiber circulator is connected to an optical signal output end of the transmitting circuit, and a second port of the optical fiber circulator is bidirectionally connected to the reflection amplifier, the third port of the optical fiber circulator of the micro-optical circulator is connected with a transmission optical fiber, the receiving circuit is used for receiving an optical fiber signal of the transmission optical fiber, and the third port of the optical fiber circulator is used for outputting the optical fiber signal to the transmission optical fiber.
Preferably, the main control board and the back board are selected from a main control board based on a BCM56861 switching chip, the optical fiber circulator adopts a three-port circulator, wherein a lower port of the first port is a second port, a lower port of the second port is a third port, the reflection amplifier comprises an input port and an output port, and the input port and the output port are both connected with the second port of the circulator;
referring to fig. 2, a semiconductor gain medium is arranged in the reflection amplifier, and a high transmission film is plated at one end of the gain medium close to the input port and the output port, and a high reflection film is plated at one end of the gain medium far from the input port and the output port.
Referring to fig. 3, preferably, the service board adopts a 16-port GPON local side board, and provides 16 GPON ports, and the service board can be freely plugged into and pulled out from the main control board according to the use requirement, and is easy to replace.
Referring to fig. 4, the transmitting circuit includes a light emitting diode D1, a first resistor R1, a second resistor R2, a third resistor R3, a capacitor C1, a core inductor L1 and a capacitor C1, one end of the first resistor R1 is connected to a power supply, the other end of the first resistor R1 is connected to an OUT-pin of the driver chip, an anode of the light emitting diode D1 is connected to the power supply, a cathode of the light emitting diode D1 is grounded after passing through a resistor R3 and the capacitor C1 in sequence, one end of the second resistor R2 is connected to a cathode of the light emitting diode D1, the other end of the second resistor R2 is connected to an OUT + pin of the driver chip, one end of the core inductor L1 is connected to a cathode of the light emitting diode D1, and the other end of the core inductor L1 is connected to a BIAS pin of the driver chip.
Referring to fig. 5, the receiving circuit includes a photo chip, a capacitor and a photodiode, an anode of the photodiode is connected to an IPhoto pin of the photo chip, a cathode of the photodiode is connected to an anode of the capacitor, a cathode of the capacitor is grounded, and an OUT pin of the photo chip is connected to a signal pin of the main control board.
The utility model discloses working process does: the upper network transmits optical fiber signals to local side equipment of the optical fiber network through optical fiber transmission, a photosensitive diode in a receiving circuit of an optical module converts the optical fiber signals into electric signals and transmits the electric signals to a photoelectric chip, the photoelectric chip preprocesses the electric signals and outputs the electric signals to a main control board, the main control board receives the electric signals and analyzes and calculates the electric signals and outputs control signals to a driving chip of a light-emitting circuit, the driving chip drives the light-emitting diode to generate optical fiber signals under the action of the control signals, the generated optical fiber signals enter a circulator from a first port of an optical fiber circulator and then are output to a reflection amplifier from a second port of the optical fiber circulator, signal amplification is carried out in the reflection amplifier and are reflected back to a second port of the optical fiber circulator from the reflection amplifier, and finally the amplified optical fiber signals are output to a transmission optical fiber from a third port of the optical fiber circulator, and finally, the functions of controlling, managing, ranging and the like of the ONU of the user end equipment are realized through the ODN network.
Adopt above-mentioned scheme, compared with the prior art, the utility model discloses an optical fiber circulator's first port with transmitting circuit's light signal output end connects, optical fiber circulator's second port with reflection amplifier both way junction, optical fiber signal are exported to transmission optical fiber from optical fiber circulator's third port, realize optical fiber signal's amplification, have improved optical line terminal's transmission distance effectively.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (3)
1. A local side device of an optical fiber network comprises a back plate, a main control plate and a service plate, wherein the back plate is electrically connected with the main control plate, the back plate is electrically connected with the service plate, and the local side device is characterized by further comprising an optical module, the optical module is respectively electrically connected with the main control plate and the service plate, the optical module comprises a driving chip, a transmitting circuit, a receiving circuit, an optical fiber circulator and a reflection amplifier, a signal input end of the transmitting circuit is electrically connected with a signal output end of the driving chip, an electrical signal output end of the receiving circuit is electrically connected with the main control plate, an output end of the service plate is electrically connected with a signal input end of the driving chip, a first port of the optical fiber circulator is connected with an optical signal output end of the transmitting circuit, a second port of the optical fiber circulator is bidirectionally connected with the reflection amplifier, the third port of the optical fiber circulator is connected with the transmission optical fiber, the receiving circuit is used for receiving the optical fiber signal of the transmission optical fiber, and the third port of the optical fiber circulator is used for outputting the optical fiber signal to the transmission optical fiber.
2. The office-side device of an optical fiber network according to claim 1, wherein the transmitting circuit comprises a light emitting diode D1, a first resistor R1, a second resistor R2, a third resistor R3, a capacitor C1, a core inductor L1 and a capacitor C1, one end of the first resistor R1 is connected to a power supply, the other end of the first resistor R1 is connected to an OUT-pin of the driving chip, an anode of the light emitting diode D1 is connected to the power supply, a cathode of the light emitting diode D1 is grounded after passing through a resistor R3 and the capacitor C1 in sequence, one end of the second resistor R2 is connected to a cathode of the light emitting diode D1, the other end of the second resistor R2 is connected to an OUT + pin of the driving chip, one end of the core inductor L1 is connected to a cathode of the light emitting diode D1, and the other end of the inductor L1 is connected to a BIAS pin of the driving chip.
3. The office equipment of claim 2, wherein the receiving circuit comprises a photo chip, a capacitor and a photodiode, an anode of the photodiode is connected to an IPhoto pin of the photo chip, a cathode of the photodiode is connected to an anode of the capacitor, a cathode of the capacitor is grounded, and an OUT pin of the photo chip is connected to a signal pin of the main control board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020119261.6U CN210958657U (en) | 2020-01-19 | 2020-01-19 | Local side equipment of optical fiber network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020119261.6U CN210958657U (en) | 2020-01-19 | 2020-01-19 | Local side equipment of optical fiber network |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210958657U true CN210958657U (en) | 2020-07-07 |
Family
ID=71377024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020119261.6U Active CN210958657U (en) | 2020-01-19 | 2020-01-19 | Local side equipment of optical fiber network |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210958657U (en) |
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2020
- 2020-01-19 CN CN202020119261.6U patent/CN210958657U/en active Active
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