Optical-to-electrical conversion circuit and corresponding long-range high-speed optical communication module

Abstract

The utility model provides a kind of photoelectric conversion circuit and corresponding long-distance high-speed optical communication module, router exports first electric signal.Probe generates second optical signal based on the light emitted by external optical equipment, and laser emits laser to external optical equipment based on first optical signal.Optical communication chip can carry out signal conditioning to first electric signal, to generate first optical signal, and output first optical signal to laser.Optical communication chip can carry out signal conditioning to second optical signal, to generate second electric signal, and output second electric signal to router.Optical communication chip exports voltage control signal, and the voltage generation network of control module is based on voltage control signal and the supply voltage of external power supply to generate probe driving voltage.Probe adjusts the signal intensity of second optical signal based on probe driving voltage, and optical communication chip can generate adjusting voltage, and adjusting voltage can cooperate with the voltage adjustment network of control module to adjust probe driving voltage.

Description

Technical Field

[0001] This utility model relates to the field of circuit technology, and in particular to a photoelectric conversion circuit and a corresponding long-distance high-speed optical communication module. Background Technology

[0002] In modern society, an optical module is an optoelectronic device that performs photoelectric conversion and electro-optical conversion during optical signal transmission. During photoelectric conversion, the optical module converts laser light into a photoelectric signal using a detector, and then transmits this signal to devices such as routers and switches via an optical communication chip. However, existing optical modules cannot adjust the signal strength of the photoelectric signal. If the signal strength is too high, it can damage the optical communication chip. Therefore, there is a technical problem with existing optical modules being prone to damaging their internal optical communication chips.

[0003] Therefore, it is necessary to provide a photoelectric conversion circuit and a corresponding long-distance high-speed optical communication module to solve the above-mentioned technical problems. Utility Model Content

[0004] This invention provides a photoelectric conversion circuit and a corresponding long-distance high-speed optical communication module, which effectively solves the technical problem that existing optical modules are prone to damage to their internal optical communication chips.

[0005] This utility model provides a photoelectric conversion circuit, which is disposed in a corresponding optical communication module. The optical communication module is used for communication between a router and an external optical device. The router is used to output a first electrical signal, which includes... A detector is used to generate a second optical signal based on the light emitted by the external optical device; A laser for emitting laser light to the external optical device based on a first optical signal; An optical communication chip includes a first input pin, a first output pin, a second input pin, and a second output pin. The first input pin is connected to the router, the first output pin is connected to the laser, the second input pin is connected to the detector, and the second output pin is connected to the router. The first input pin is used to input the first electrical signal, the optical communication chip is used to perform signal conditioning operation on the first electrical signal to generate the first optical signal, and the first output pin is used to output the first optical signal to the laser. The second input pin is used to input the second optical signal, the optical communication chip is used to perform signal conditioning operation on the second optical signal to generate a second electrical signal, and the second output pin is used to output the second electrical signal to the router; The photoelectric conversion circuit further includes a control module, which includes a voltage generation network and a voltage adjustment network. The optical communication chip further includes a voltage control pin and an adjustment voltage pin. The input terminal of the voltage generation network is connected to an external power supply and the voltage control pin. The output terminal of the voltage generation network is connected to the detector and the voltage adjustment network. The voltage adjustment network is connected to the adjustment voltage pin. The voltage control pin is used to output a voltage control signal. The voltage generation network generates a detector driving voltage based on the voltage control signal and the power supply voltage of the external power source. The detector is used to adjust the signal strength of the second optical signal based on the detector driving voltage. The optical communication chip is used to generate the adjustment voltage. The adjustment voltage pin is used to output the adjustment voltage. The adjustment voltage is used to cooperate with the voltage adjustment network to adjust the detector driving voltage.

[0006] Furthermore, the control module also includes a voltage regulator chip, which includes a voltage regulator input pin and a voltage regulator output pin. The voltage regulator input pin is connected to an external power supply, and the voltage regulator output pin is connected to the input terminal of the voltage generation network. The voltage regulator chip is used to regulate the power supply voltage.

[0007] Furthermore, the optical communication chip also includes a voltage adjustment pin, which is connected to the first output pin. The optical communication chip is used to generate a voltage adjustment signal, and the voltage adjustment pin is used to output the voltage adjustment signal, which is used to adjust the signal strength of the first optical signal.

[0008] Furthermore, the optical communication chip also includes an error reporting pin, which is connected to the router. When the optical communication chip is in an abnormal state, the optical communication chip generates an error signal, and the error reporting pin is used to transmit the error signal to the router.

[0009] Furthermore, the optical communication chip also includes a control pin, which is connected to the router. The router is used to output control signals from external devices, and the control pin is used to receive the control signals. The control signals are used to control the optical communication chip.

[0010] Furthermore, the control module includes a filtering unit, one end of which is connected to the regulated input pin, and the other end of which is grounded. The filtering unit is used to filter the power supply voltage. Furthermore, the filtering unit includes a first filtering capacitor and a second filtering capacitor. One end of the first filtering capacitor is connected to the regulated input pin, and the other end of the first filtering capacitor is grounded. The second filtering capacitor is connected in parallel with the first filtering capacitor.

[0011] Furthermore, the control module includes a diode, the anode of which is connected to the voltage regulator output pin, and the cathode of which is connected to the input terminal of the voltage generation network. The diode is used to prevent the voltage control signal from being transmitted in reverse to the voltage regulator chip.

[0012] Furthermore, the voltage regulator chip is model AP21838N, and the optical communication chip is model M02190.

[0013] A long-distance high-speed optical communication module, comprising any of the photoelectric conversion circuits described above.

[0014] Compared with the prior art, the advantages of this invention are as follows: This invention provides a photoelectric conversion circuit, which includes a detector, a laser, an optical communication chip, and a control module. The detector generates a second optical signal based on light emitted by an external optical device, and the laser emits laser light to the external optical device based on a first optical signal. The optical communication chip can perform signal conditioning operations on the first electrical signal to generate a first optical signal, and can output the first optical signal to the laser. The optical communication chip can also perform signal conditioning operations on the second optical signal to generate a second electrical signal, and can output the second electrical signal to a router.

[0015] Furthermore, the optical communication chip can output a voltage control signal. The voltage generation network of the control module generates a detector driving voltage based on the voltage control signal and the power supply voltage of the external power source. The detector adjusts the signal strength of the second optical signal based on the detector driving voltage. Additionally, the optical communication chip can generate an adjustment voltage, which, in conjunction with the voltage adjustment network of the control module, adjusts the detector driving voltage. Therefore, by adjusting the adjustment voltage, the photoelectric conversion circuit can regulate the detector driving voltage. Further, because the detector adjusts the signal strength of the second optical signal based on the detector driving voltage, the photoelectric conversion circuit can adjust the signal strength of the second optical signal, ensuring it remains within a set range, thus preventing excessive signal strength from damaging the optical communication chip. This effectively solves the technical problem of existing optical modules easily damaging their internal optical communication chips. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments are briefly introduced below. The drawings described below are only the corresponding drawings of some embodiments of this utility model.

[0017] Figure 1 This is a block diagram of an embodiment of the photoelectric conversion circuit of this utility model.

[0018] Figure 2 This is one of the circuit diagrams of an embodiment of the photoelectric conversion circuit of this utility model.

[0019] Figure 3 This is a second circuit diagram of an embodiment of the photoelectric conversion circuit of this utility model.

[0020] In the diagram, 10 is the photoelectric conversion circuit; 11 is the detector; 12 is the laser; 13 is the optical communication chip; 14 is the router; 15 is the control module; 151 is the voltage generation network; 1511 is the input terminal of the voltage generation network; 1512 is the output terminal of the voltage generation network; 152 is the voltage adjustment network; 153 is the filter unit; and 16 is the external power supply. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0022] The directional terms mentioned in this utility model, such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", "top" and "bottom", are only for reference to the orientation of the accompanying drawings. The directional terms used are for the purpose of explaining and understanding this utility model, and are not intended to limit this utility model.

[0023] The terms "first" and "second" in this utility model are used for descriptive purposes only and should not be construed as indicating or implying relative importance, nor as a restriction on the order of events.

[0024] In the diagram, units with similar structures are represented by the same labels.

[0025] Please refer to Figure 1 , Figure 2 and Figure 3This invention provides a photoelectric conversion circuit 10. The photoelectric conversion circuit 10 is disposed in a corresponding optical communication module, which is used for communication between a router 14 and an external optical device. The router 14 outputs a first electrical signal. The photoelectric conversion circuit 10 includes a detector 11, a laser 12, an optical communication chip 13, and a control module 15. The detector 11 generates a second optical signal based on the light emitted by the external optical device, and the laser 12 emits a laser beam to the external optical device based on the first optical signal. The optical communication chip 13 is model M02190 and includes a first input pin, a first output pin, a second input pin, and a second output pin. The first input pin includes a first input pin TxINN and a first input pin TxINP. The first output pin includes a first output pin TxOUTN and a first output pin TxOUTP. The second input pin includes a second input pin RxINN and a second input pin RxINN. The second output pin includes a second output pin RxOUTN and a second output pin RxOUTP. The first input pin is connected to the router 14, and the first output pin is connected to the laser 12. The second input pin is connected to detector 11, and the second output pin is connected to router 14.

[0026] Please refer to Figure 1 , Figure 2 and Figure 3 The first input pin is used to input a first electrical signal, and the optical communication chip 13 is used to perform signal conditioning operations on the first electrical signal. The optical communication chip 13 can generate a first optical signal, and the first output pin is used to output the first optical signal to the laser 12. The second input pin is used to input a second optical signal, and the optical communication chip 13 is used to perform signal conditioning operations on the second optical signal. The optical communication chip 13 generates a second electrical signal, and the second output pin is used to output the second electrical signal to the router 14.

[0027] Please refer to Figure 1 , Figure 2 and Figure 3The control module 15 includes a voltage generation network 151 and a voltage adjustment network 152. The optical communication chip 13 also includes a voltage control pin AUXDAC and an adjustment voltage pin ADCV / ADCI. The input terminal 1511 of the voltage generation network is connected to an external power supply 16 and the voltage control pin AUXDAC. The output terminal 1512 of the voltage generation network is connected to the detector 11 and the voltage adjustment network 152. The voltage adjustment network 152 is connected to the adjustment voltage pin ADCV / ADCI. The voltage control pin AUXDAC is used to output a voltage control signal. The voltage generation network 151 generates a detector driving voltage based on the voltage control signal and the power supply voltage of the external power supply 16. Specifically, under the drive of the voltage control signal, the voltage generation network 151 generates the detector driving voltage based on the power supply voltage of the external power supply 16. Furthermore, the detector 11 is provided with a detector driving pin VAPD, which is connected to the output terminal 1512 of the voltage generation network. The detector driving pin VAPD can receive the detector driving voltage, and the detector 11 can adjust the signal strength of the second optical signal based on the detector driving voltage. The optical communication chip 13 can generate an adjustable voltage. The adjustable voltage pins ADCV / ADCI are used to output the adjustable voltage, which is used in conjunction with the voltage adjustment network 152 to adjust the detector drive voltage.

[0028] Please refer to Figure 1 , Figure 2 and Figure 3 The voltage generation network 151 of the control module 15 can generate an initial detector drive voltage based on the voltage control signal and the power supply voltage. If the optical communication chip 13 receives a second optical signal with excessive intensity, the optical communication chip 13 can generate a corresponding adjustment voltage based on the received second optical signal. The optical communication chip 13 transmits the adjustment voltage to the voltage adjustment network 152 through the adjustment voltage pin ADCV / ADCI. Because the voltage adjustment network 152 is connected to the voltage generation network 151, the adjustment voltage can be transmitted to the voltage generation network 151 through the voltage adjustment network 152. Since the detector drive voltage is generated by the voltage generation network 151, the adjustment voltage can work with the voltage adjustment network 152 to adjust the detector drive voltage, thereby reducing the detector drive voltage. Because the detector 11 can adjust the signal strength of the second optical signal based on the detector drive voltage, the detector 11 can reduce the signal strength of the second optical signal based on the detector drive voltage.

[0029] If the optical communication chip 13 receives a second optical signal with insufficient strength, it can generate a corresponding adjustment voltage based on the received signal. The chip transmits this adjustment voltage to the voltage adjustment network 152 via the adjustment voltage pins ADCV / ADCI. Since the voltage adjustment network 152 is connected to the voltage generation network 151, the adjustment voltage can be transmitted from the network to the network. Because the detector driving voltage is generated by the voltage generation network 151, the adjustment voltage can work with the voltage adjustment network 152 to adjust the detector driving voltage, thereby increasing it. Because the detector 11 can adjust the signal strength of the second optical signal based on the detector driving voltage, it can increase the signal strength of the second optical signal based on this voltage. Therefore, the signal strength of the second optical signal is always within the set range.

[0030] Please refer to Figure 1 , Figure 2 and Figure 3 The optical communication chip 13 also includes a voltage adjustment pin BAISout, which is connected to the first output pin TxOUTP. The optical communication chip 13 generates a voltage adjustment signal, and the BAISout pin outputs this signal. This voltage adjustment signal can increase or decrease the voltage of the first optical signal, thereby adjusting the signal strength of the first optical signal and helping to prevent excessive signal strength from damaging the laser 12. The optical communication chip 13 also includes an error reporting pin TxFault, which is connected to the router 14. When the optical communication chip 13 is in an abnormal state, it generates an error signal, which is transmitted to the router 14 via the TxFault pin. Therefore, the router 14 can obtain information about the abnormal state of the optical communication chip 13 through the error signal. The optical communication chip 13 also includes control pins, including control pins SCL_S / SCLK and SDA_S / SDIO, which are connected to the router 14. The router 14 outputs control signals from external devices, and the control pins receive these control signals. The control signal can control the optical communication chip 13, and the control signal can control the optical communication chip 13 to be in a normal working state or to stop working state.

[0031] Please refer to Figure 1 , Figure 2 and Figure 3The control module 15 also includes a voltage regulator chip U3, model AP21838N. Voltage regulator chip U3 includes a voltage input pin VIN and a voltage output pin VOUT. The voltage input pin VIN is connected to an external power supply 16. The voltage output pin VOUT is connected to the input terminal 1511 of the voltage generation network. Voltage regulator chip U3 can regulate the power supply voltage. The control module 15 includes a diode D1. The anode of diode D1 is connected to the voltage output pin VOUT. The cathode of diode D1 is connected to the input terminal 1511 of the voltage generation network. Diode D1 is used to prevent the voltage control signal from being transmitted in reverse to voltage regulator chip U3. The control module 15 also includes a transistor Q1. The optical communication signal also includes a drive pin GDRV, which can output a PWM signal. The gate of transistor Q1 is connected to the drive pin, the source of transistor Q1 is grounded, and the drain of transistor Q1 is connected to the voltage output pin VOUT. This PWM signal can control transistor Q1 to turn on or off. Based on the duty cycle of the PWM signal, the transistor Q1 can adjust the output voltage of the voltage regulator chip U3. The control module 15 includes a filter unit 153, one end of which is connected to the voltage regulator input pin. The other end of the filter unit 153 is grounded. The filter unit 153 is used to filter the power supply voltage. The filter unit 153 includes a first filter capacitor C37 and a second filter capacitor C38. One end of the first filter capacitor C37 is connected to the voltage regulator input pin VOUT. The other end of the first filter capacitor C37 is grounded. The second filter capacitor C38 is connected in parallel with the first filter capacitor C37.

[0032] This utility model also provides a long-distance high-speed optical communication module, which internally incorporates a photoelectric conversion circuit 10. The device structure of this optical communication module is similar to that of the photoelectric conversion circuit 10; please refer to the description of the device structure of the photoelectric conversion circuit 10 for details. The working principle of this optical communication module is similar to that of the photoelectric conversion circuit 10; please refer to the description of the working principle of the photoelectric conversion circuit 10 for details.

[0033] The working principle of this utility model is as follows: When the photoelectric conversion circuit 10 is working, firstly, the router 14 outputs a first electrical signal, and the first input pin of the optical communication chip 13 receives the first electrical signal. Next, the optical communication chip 13 performs signal conditioning on the first electrical signal, generating a first optical signal. Furthermore, the optical communication chip 13 outputs the first optical signal to the laser 12 through its first output pin, and the laser 12 emits laser light to an external optical device based on the first optical signal. Moreover, the optical communication chip 13 outputs a voltage control signal, and the external power supply 16 outputs a power supply voltage. Then, the voltage generation network 151 of the control module 15 generates an initial detector driving voltage based on the voltage control signal and the power supply voltage. This detector driving voltage drives the detector 11, and subsequently, the detector 11 generates a second optical signal based on the light emitted by the external optical device. Then, the second optical signal is input to the second input pin of the optical communication chip 13, and the optical communication chip 13 performs signal conditioning on the second optical signal. Thus, the optical communication chip 13 can generate a second electrical signal, and the optical communication chip 13 can output the second electrical signal to the router 14 through the second output pin.

[0034] If the optical communication chip 13 receives a second optical signal with excessive strength, it can generate a corresponding adjustment voltage based on the received signal. The optical communication chip 13 then transmits the adjustment voltage to the voltage adjustment network 152 via the adjustment voltage pins ADCV / ADCI. Since the voltage adjustment network 152 is connected to the voltage generation network 151, the adjustment voltage can be transmitted to the voltage generation network 151 via the voltage adjustment network 152. Because the detector driving voltage is generated by the voltage generation network 151, the adjustment voltage can work in conjunction with the voltage adjustment network 152 of the control module 15 to adjust the detector driving voltage, thereby reducing the detector driving voltage. Because the detector 11 can adjust the signal strength of the second optical signal based on the detector driving voltage, it can reduce the signal strength of the second optical signal based on this voltage. If the optical communication chip 13 receives a second optical signal with insufficient strength, it can generate a corresponding adjustment voltage based on the received signal. The optical communication chip 13 then transmits the adjustment voltage to the voltage adjustment network 152 via the adjustment voltage pins ADCV / ADCI. Because the voltage adjustment network 152 is connected to the voltage generation network 151, the adjusted voltage can be transmitted to the voltage generation network 151 through the voltage adjustment network 152. Since the detector drive voltage is generated through the voltage generation network 151, the adjusted voltage can work in conjunction with the voltage adjustment network 152 of the control module 15 to adjust the detector drive voltage, thereby increasing the detector drive voltage. Because the detector 11 can adjust the signal strength of the second optical signal based on the detector drive voltage, the detector 11 can increase the signal strength of the second optical signal based on this detector drive voltage. Therefore, the signal strength of the second optical signal is always within the set range.

[0035] This invention provides a photoelectric conversion circuit, which includes a detector, a laser, an optical communication chip, and a control module. The detector generates a second optical signal based on light emitted by an external optical device, and the laser emits laser light to the external optical device based on a first optical signal. The optical communication chip can perform signal conditioning operations on the first electrical signal to generate a first optical signal, and can output the first optical signal to the laser. The optical communication chip can also perform signal conditioning operations on the second optical signal to generate a second electrical signal, and can output the second electrical signal to a router.

[0036] Furthermore, the optical communication chip can output a voltage control signal. The voltage generation network of the control module generates a detector driving voltage based on the voltage control signal and the power supply voltage of the external power source. The detector adjusts the signal strength of the second optical signal based on the detector driving voltage. Additionally, the optical communication chip can generate an adjustment voltage, which, in conjunction with the voltage adjustment network of the control module, adjusts the detector driving voltage. Therefore, by adjusting the adjustment voltage, the photoelectric conversion circuit can regulate the detector driving voltage. Further, because the detector adjusts the signal strength of the second optical signal based on the detector driving voltage, the photoelectric conversion circuit can adjust the signal strength of the second optical signal, ensuring it remains within a set range, thus preventing excessive signal strength from damaging the optical communication chip. This effectively solves the technical problem of existing optical modules easily damaging their internal optical communication chips.

[0037] In summary, although the present invention has been disclosed above with reference to preferred embodiments, the above preferred embodiments are not intended to limit the present invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the claims.

Claims

1. A photoelectric conversion circuit characterized by comprising: The photoelectric conversion circuit is disposed in the corresponding optical communication module, the optical communication module is used for communication between the router and the external optical device, and the router is used to output a first electrical signal, which includes, A detector is used to generate a second optical signal based on the light emitted by the external optical device; A laser for emitting laser light to the external optical device based on a first optical signal; An optical communication chip includes a first input pin, a first output pin, a second input pin, and a second output pin. The first input pin is connected to the router, the first output pin is connected to the laser, the second input pin is connected to the detector, and the second output pin is connected to the router. The first input pin is used to input the first electrical signal, the optical communication chip is used to perform signal conditioning operation on the first electrical signal to generate the first optical signal, and the first output pin is used to output the first optical signal to the laser. The second input pin is used to input the second optical signal, the optical communication chip is used to perform signal conditioning operation on the second optical signal to generate a second electrical signal, and the second output pin is used to output the second electrical signal to the router; The photoelectric conversion circuit further includes a control module, which includes a voltage generation network and a voltage adjustment network. The optical communication chip further includes a voltage control pin and an adjustment voltage pin. The input terminal of the voltage generation network is connected to an external power supply and the voltage control pin. The output terminal of the voltage generation network is connected to the detector and the voltage adjustment network. The voltage adjustment network is connected to the adjustment voltage pin. The voltage control pin is used to output a voltage control signal. The voltage generation network generates a detector driving voltage based on the voltage control signal and the power supply voltage of the external power source. The detector is used to adjust the signal strength of the second optical signal based on the detector driving voltage. The optical communication chip is used to generate the adjustment voltage. The adjustment voltage pin is used to output the adjustment voltage. The adjustment voltage is used to cooperate with the voltage adjustment network to adjust the detector driving voltage.

2. The photoelectric conversion circuit according to claim 1, characterized by, The control module also includes a voltage regulator chip, which has a voltage regulator input pin and a voltage regulator output pin. The voltage regulator input pin is connected to an external power supply, and the voltage regulator output pin is connected to the input terminal of the voltage generation network. The voltage regulator chip is used to regulate the power supply voltage.

3. The photoelectric conversion circuit according to claim 1, wherein The optical communication chip also includes a voltage adjustment pin, which is connected to the first output pin. The optical communication chip is used to generate a voltage adjustment signal, and the voltage adjustment pin is used to output the voltage adjustment signal. The voltage adjustment signal is used to adjust the signal strength of the first optical signal.

4. The photoelectric conversion circuit according to claim 1, wherein The optical communication chip also includes an error reporting pin, which is connected to the router. When the optical communication chip is in an abnormal state, the optical communication chip generates an error signal, and the error reporting pin is used to transmit the error signal to the router.

5. The photoelectric conversion circuit according to claim 1, wherein The optical communication chip also includes a control pin, which is connected to the router. The router is used to output control signals from external devices, and the control pin is used to receive the control signals. The control signals are used to control the optical communication chip.

6. The photoelectric conversion circuit according to claim 2, wherein The control module includes a filtering unit, one end of which is connected to the regulated input pin and the other end of which is grounded. The filtering unit is used to filter the power supply voltage.

7. The photoelectric conversion circuit according to claim 6, wherein The filtering unit includes a first filtering capacitor and a second filtering capacitor. One end of the first filtering capacitor is connected to the voltage regulator input pin, and the other end of the first filtering capacitor is grounded. The second filtering capacitor is connected in parallel with the first filtering capacitor.

8. The photoelectric conversion circuit according to claim 2, wherein The control module includes a diode, the anode of which is connected to the voltage regulator output pin, and the cathode of which is connected to the input terminal of the voltage generation network. The diode is used to prevent the voltage control signal from being transmitted in reverse to the voltage regulator chip.

9. The photoelectric conversion circuit according to claim 2, wherein The voltage regulator chip is model AP21838N, and the optical communication chip is model M02190.

10. A long reach high speed optical communication module, characterized by, It includes the photoelectric conversion circuit as described in any one of claims 1-9.

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