CN213584597U

CN213584597U - Drive circuit of communication tunable laser

Info

Publication number: CN213584597U
Application number: CN202021325571.XU
Authority: CN
Inventors: 潘万胜; 蔡延君; 吴鲁刚; 刘世锋; 傅剑斌; 梁健宏; 吕瑞光; 吴欢庆
Original assignee: Nanjing Feimi Photoelectric Technology Co ltd
Current assignee: Nanjing Feimi Photoelectric Technology Co ltd
Priority date: 2020-07-08
Filing date: 2020-07-08
Publication date: 2021-06-29
Anticipated expiration: 2030-07-08

Abstract

The utility model relates to a laser instrument drives technical field, specifically is a drive circuit of communication tunable laser instrument, including actuating system, actuating system includes heavy current positive voltage step-down voltage stabilizing module, heavy current negative voltage stabilizing module and communication protocol conversion module, and heavy current positive voltage step-down voltage stabilizing module comprises first power chip and first peripheral circuit, and heavy current positive voltage step-down voltage stabilizing module includes the filtering energy storage device; the beneficial effects are that: the utility model provides a drive circuit of communication tunable laser has realized communication tunable laser's positive negative voltage high power drive requirement and remote transmission communication and control, drive circuit can be in the same place with communication tunable laser is integrated, conveniently carry out the modularized design, DC 5.5 ~ 17V's wide input range has, can effectual protection expensive communication tunable laser through the restorable fuse, through the filter circuit and the magnetic bead of strengthening, reduce drive circuit's EMI radiation.

Description

Drive circuit of communication tunable laser

Technical Field

The utility model relates to a laser instrument drive technical field specifically is a drive circuit of communication tunable laser instrument.

Background

Tunable laser (tunable laser) refers to a laser that can continuously change the output wavelength of laser light within a certain range. Such lasers are used in a wide variety of applications, and are essential in laser communications, particularly in the increasingly sophisticated applications of dense optical multiplexing (DWDM: a laser technology that combines a set of optical wavelengths for transmission over an optical fiber, which is a technique used to increase the bandwidth over fiber backbones). Ensuring the normal work of the tunable laser within a wide temperature range is fundamental and important. With the higher integration degree of the communication module, the driving module with small volume, high power, stability and reliability is an advantageous choice for the tunable laser driving circuit.

In the prior art, the problem of insufficient negative voltage power supply power and the problem of over standard EMI caused by noise brought by a driving circuit are more prominent in the scheme of a tunable laser driving circuit; therefore, the utility model provides a drive circuit of communication tunable laser is used for solving above-mentioned problem.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a drive circuit of communication tunable laser to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a drive circuit of communication tunable laser ware, includes actuating system, actuating system includes heavy current positive voltage step-down voltage stabilizing module, heavy current negative voltage stabilizing module and communication protocol conversion module, heavy current positive voltage step-down voltage stabilizing module comprises first power chip and first peripheral circuit, and heavy current positive voltage step-down voltage stabilizing module includes the filtering energy storage, and the filtering energy storage feeds back to the chip through output sampling resistor partial pressure, heavy current negative voltage stabilizing module comprises second power chip and second peripheral circuit, communication protocol conversion module comprises anti-jamming circuit and communication chip.

Preferably, the first power chip is a TPS562208 power chip, which has a wide input voltage range of DC + 4.5- +17V, and the first power chip and the first peripheral circuit are electrically connected in a bidirectional interconnection manner.

Preferably, the filtering energy storage device is composed of a MOSFET switch and a capacitance inductor.

Preferably, the second power chip is a TPS5430 power chip, which has a wide input voltage range of DC +5.5 to +36V, the TPS5430 realizes positive voltage step-down and voltage stabilization, outputs 3A driving current, and the second power chip and the second peripheral circuit are electrically connected in a bidirectional interconnection.

Preferably, the communication chip is a MAX3232 chip, which implements 3.3V low voltage operation, and the anti-interference circuit and the communication chip are in bidirectional intercommunication electrical connection.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model provides a drive circuit of communication tunable laser has realized the positive negative voltage high power drive requirement and the remote transmission communication and the control of communication tunable laser, and drive circuit can be in the same place with communication tunable laser is integrated, conveniently carries out the modularized design, has DC 5.5 ~ 17V's wide input range, can effectively protect expensive communication tunable laser through the restorable fuse, through reinforced filter circuit and magnetic bead, reduces drive circuit's EMI radiation;

2. the utility model provides a drive circuit of communication tunable laser possesses the wide input voltage scope of DC 5.5 ~ 17V, possess positive electric 2A, negative electricity 1A's driving force, has designed PTC self-resuming fuse and is used for overcurrent protection, has adopted MAX3232 to realize that UART communication converts the RS232 agreement that the interference killing feature is stronger, has designed filtering structure to reduce the MEI noise.

Drawings

Fig. 1 is a block diagram of the driving system of the present invention;

fig. 2 is a driving circuit diagram of the communication tunable laser of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 2, the present invention provides a technical solution: a drive circuit of a communication tunable laser comprises a drive system, wherein the drive system comprises a large-current positive-voltage step-down and voltage-stabilizing module, a large-current negative-voltage-stabilizing module and a communication protocol conversion module, namely RS232 communication, a switch voltage stabilizer A, a switch voltage stabilizer B and a filtering energy accumulator, the RS232 communication and the switch voltage stabilizer are shielded and isolated, the large-current positive-voltage step-down and voltage-stabilizing module comprises a first power chip and a first peripheral circuit, the first power chip is a TPS562208 power chip and has a wide input voltage range of DC +4.5 to +17V, the first power chip is electrically connected with the first peripheral circuit in a bidirectional intercommunication manner, the large-current positive-voltage step-down and voltage-stabilizing module comprises the filtering energy accumulator, the filtering energy accumulator feeds back to the chip through the partial pressure of an output sampling resistor, and;

the high-current negative voltage stabilizing module consists of a second power supply chip and a second peripheral circuit, wherein the second power supply chip is a TPS5430 power supply chip which has a wide input voltage range of DC +5.5 to +36V, the TPS5430 realizes positive voltage reduction and stabilization and outputs 3A driving current, and the second power supply chip is in bidirectional intercommunication electrical connection with the second peripheral circuit;

the communication protocol conversion module consists of an anti-interference circuit and a communication chip, the communication chip is an MAX3232 chip, the communication chip realizes 3.3V low-voltage work, and the anti-interference circuit is electrically connected with the communication chip in a bidirectional intercommunication manner.

The working principle is as follows: the large-current positive-voltage reduction and stabilization module consists of a TPS562208 power chip and a first peripheral circuit, has a wide input voltage range of DC +4.5 to +17V, realizes large-current output through a filter energy storage device consisting of an MOSFET switch and a capacitance inductor, dynamically adjusts the voltage through outputting and sampling resistor partial pressure feedback to the chip to realize the voltage stabilization effect, realizes the effect of reducing ripples through a large capacitor, benefits from the low internal resistance of the MOSFET, and has the characteristics of small heat and low ripples on the whole; the large-current negative voltage step-down and voltage-stabilizing module consists of a TPS5430 power supply chip and a second peripheral circuit, has a wide input voltage range of DC +5.5 to +36V, realizes voltage reduction and voltage stabilization of positive voltage by the TPS5430, can output 3A driving current, is changed into negative voltage output after being transformed and designed by an inverse topological structure, and has the loss of the power supply current relative to positive voltage output not more than 50 percent, thereby realizing large-current output and making up the characteristic that the traditional charge pump negative voltage module can not output large current; the communication protocol conversion module consists of an anti-interference circuit and a MAX3232 chip, and has the function of realizing the long-distance communication transmission and control of the communication tunable laser module. The power supply of the high-voltage power supply is provided by the positive voltage reduction and voltage stabilization module, the high-voltage power supply is supplied by 5V compared with a traditional RS232 chip, 3.3V low-voltage work and low power consumption can be achieved, and the anti-interference part is realized by selecting proper magnetic beads, a power supply ground and a communication digital ground to isolate and optimize circuit board wiring so as to achieve the effect of reducing EMI electromagnetic radiation. Thanks to the higher RS232 communication voltage, the digital level reaches +/-10V, and compared with the communication level of 3.3V of the communication tunable laser module, the communication tunable laser module has the advantages of strong anti-interference capability and small influence of line resistance, thereby realizing the long-distance communication function.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A drive circuit for a communication tunable laser, comprising a drive system, characterized in that: the driving system comprises a large-current positive voltage reduction and voltage stabilization module, a large-current negative voltage reduction and voltage stabilization module and a communication protocol conversion module, wherein the large-current positive voltage reduction and voltage stabilization module comprises a first power chip and a first peripheral circuit, the large-current positive voltage reduction and voltage stabilization module comprises a filtering energy accumulator, the filtering energy accumulator feeds back to the chip through the partial pressure of an output sampling resistor, the large-current negative voltage reduction and voltage stabilization module comprises a second power chip and a second peripheral circuit, and the communication protocol conversion module comprises an anti-interference circuit and a communication chip.

2. The driving circuit of a communication tunable laser according to claim 1, wherein: the first power chip is a TPS562208 power chip which has a wide input voltage range of DC + 4.5- +17V, and the first power chip is electrically connected with the first peripheral circuit in a bidirectional intercommunication manner.

3. The driving circuit of a communication tunable laser according to claim 1, wherein: the filtering energy storage device is composed of an MOSFET switch and a capacitance inductor.

4. The driving circuit of a communication tunable laser according to claim 1, wherein: the second power supply chip is a TPS5430 power supply chip which has a wide input voltage range of DC +5.5 to +36V, the TPS5430 realizes voltage reduction and voltage stabilization of positive voltage and outputs 3A driving current, and the second power supply chip is in bidirectional intercommunication electrical connection with a second peripheral circuit.

5. The driving circuit of a communication tunable laser according to claim 1, wherein: the communication chip is an MAX3232 chip which realizes 3.3V low-voltage work, and the anti-interference circuit is electrically connected with the communication chip in a bidirectional intercommunication manner.