CN202444174U - Efficient and compact driving power supply used for diode pump laser - Google Patents

Abstract

The utility model is a high-efficiency and compact drive power supply for a diode-pumped laser. It includes a step-down anti-overcurrent circuit, a rectifier filter circuit, a voltage divider current limiting resistor R1, a delay protection switch S1, an adjustable current expansion circuit, a constant current output circuit, and the input terminal of the step-down anti-overcurrent circuit is connected to the national 220V~ The 50HZ residential electricity is connected, and the drive power supply outputs a tunable constant current to connect with the laser diode. Its characteristics are: the 220V~50HZ alternating current becomes 11V alternating current through the step-down anti-overcurrent circuit, and then obtains a stable voltage through the rectification and filtering circuit; rectification The output terminal of the filter circuit is connected with the constant current output circuit and the adjustable current expansion circuit through the voltage dividing current limiting resistor R1, and is connected with the delay protection switch S1. The power supply is highly efficient, highly reliable, and outputs a constant current.

Description

An Efficient and Compact Driver for Diode-Pumped Lasers

technical field

The utility model belongs to the technical field of lasers, and relates to a power supply circuit, in particular to a high-efficiency and compact driving power supply for diode-pumped lasers. the

Background technique

Diode-pumped solid-state lasers are currently the mainstream lasers for both military and civilian applications. However, the power supply of this type of laser is often relatively large in size and weight, and the heat consumption is also serious, which limits its application in many fields. In addition, in order to stabilize the output power of the laser, the diode used as the pump light is best to work in a low voltage constant current state to ensure the stability of the pump light power, which also requires high stability of the power supply. It can be seen that reducing the volume of the driving source, improving voltage and current stability and conversion efficiency, improving heat dissipation performance, and increasing the reliability of the driving source can expand the application range of diode-pumped solid-state lasers. the

Contents of the invention

The purpose of this utility model is to provide a driving power supply for diode pumped lasers. On the one hand, it can achieve constant current output when the diode works stably, and on the other hand, it can make the whole power supply compact, efficient and reliable. the

The technical solution of the utility model is a high-efficiency and compact drive power supply for diode pumped lasers, which includes a step-down anti-overcurrent circuit, a rectification filter circuit, a voltage dividing current limiting resistor R1, a delay protection switch S1, The tunable current expansion circuit, constant current output circuit, the input end of the step-down anti-overcurrent circuit are connected to the country's 220V~50HZ residential electricity, and the drive power output is connected to the laser diode with a tunable constant current. The characteristics are: 220V~50HZ The alternating current is changed to 11V alternating current through the step-down anti-overcurrent circuit, and then the stable voltage is obtained through the rectification and filtering circuit; the output terminal of the rectification and filtering circuit is connected with the constant current output circuit and the adjustable current expansion circuit through the voltage dividing and current limiting resistor R1, and The delay protection switch S1 is connected; the 7805 three-terminal voltage regulator chip in the constant current output circuit is used as a 5V constant voltage source to obtain a constant current through the resistor R3, and then the current is expanded by the adjustable current expansion circuit, and the output voltage is adjusted by the potentiometer R2 current to the laser diode. the

The step-down anti-overcurrent circuit is composed of a transformer and two PTC resistors respectively connected in series in the primary coil and the secondary coil of the transformer. the

The rectification filter circuit is composed of a bridge circuit composed of 4 diodes and a polar capacitor. the

The adjustable current expansion circuit is composed of a potentiometer R2 and a power tube. the

The constant current output circuit is a 7805 three-terminal voltage regulator chip, and the input terminal of the 7805 chip is connected with a capacitor, and the output terminal is connected with a resistor R3 and a capacitor. the

The resistance value of resistor R1 is selected between 0.5Ω-1.5Ω, and the optimal choice is 1Ω; the adjustable resistance value range of potentiometer R2 is 0Ω-5Ω; the resistance value of resistor R3 is 1Ω. the

The utility model is characterized by adopting 7805 integrated voltage stabilizing chip and external resistor to output constant current, which avoids complex constant current circuit and improves efficiency; when the power tube expands current, a potentiometer is used instead of a fixed resistor to achieve an output constant current that can be tuned to meet different requirements. Requirements; the traditional fuse cannot recover by itself after the line is blown and disconnected, and the PTC resistor can automatically return to the working state after the circuit fault is eliminated; in order to prevent the core working components from being damaged due to fluctuations in the external power grid, there is a delay protection switch to protect the circuit. the

Description of drawings

The utility model will be further described below in conjunction with embodiment. the

Fig. 1 is a circuit structure diagram of a high-efficiency and compact driving power supply for diode-pumped lasers. the

In the figure: 1. Step-down anti-overcurrent circuit; 2. Rectification filter circuit; 3. Constant current output circuit; 4. Adjustable current expansion circuit; 5. Laser diode. the

Detailed ways

As shown in Figure 1, the step-down anti-overcurrent circuit 1 is composed of a transformer and two PTC resistors connected in series in the primary coil and secondary coil of the transformer respectively. As it rises, its resistance value rises sharply, which acts to limit the current and avoid damage to the components in the circuit. The traditional fuse cannot recover by itself after the line is blown and disconnected, and the PTC resistor can automatically recover to the working state after the circuit fault is eliminated. the

The rectification filter circuit 2 is composed of a bridge circuit composed of 4 diodes and a polarized capacitor. A stable voltage can be obtained through the rectification and filtering circuit 2 . the

The constant current output circuit 3 is a 7805 three-terminal voltage regulator chip, and the input terminal of the 7805 chip is connected with a capacitor, and the output terminal is connected with a resistor R3 and a capacitor, and the resistance value of R3 is 1Ω. 7805 integrated voltage regulator chip and external resistor output constant current to avoid complex constant current circuit and improve efficiency. the

The adjustable current expansion circuit 4 is composed of a potentiometer R2 and a power tube; the adjustable resistance range of the potentiometer R2 is 0Ω-5Ω. When the power tube expands the current, the potentiometer is used to replace the fixed resistance to achieve the constant output current, which can be tuned to meet different needs. the

The input terminal of step-down anti-overcurrent circuit 1 is connected with the country's 220V~50HZ residential electricity, and outputs 11V alternating current, which is rectified and filtered to obtain a stable voltage, and then connected to the constant current output circuit through the voltage dividing and current limiting resistor R1 3. The resistance value of R1 is 1Ω. The 7805 three-terminal voltage regulator chip working in the floating state is used as a 5V constant voltage source to obtain a constant current through the resistor R3, and then the adjustable current expansion circuit 4 expands the current, which can be adjusted by the potentiometer R2 The final output current goes to the laser diode. the

A delay protection switch S1 is installed between the rectification filter circuit 2 and the constant current output circuit 3. When the time-delay protection switch S1 is closed, it will protect the short circuit of the back circuit. When the external power grid fluctuates, it will not cause damage to the 7805 chip, power tube and diode. the

Claims (6)

1. the driving power that is used for diode-pumped laser of efficient a, compact; It comprises step-down anti-overflow circuit, current rectifying and wave filtering circuit, current-limiting resistor voltage divider R1, delay protection switch S 1, tunable expansion current circuit, constant current output circuit; Step-down anti-overflow circuit input end is communicated with national 220V ~ 50HZ residential electricity consumption; Driving power is exported tunable constant current and is communicated with laser diode; It is characterized in that: the alternating current of 220V ~ 50HZ becomes the 11V alternating current through step-down anti-overflow circuit, obtains burning voltage through current rectifying and wave filtering circuit again; Rectification filter circuit output end is communicated with constant current output circuit, tunable expansion current circuit through current-limiting resistor voltage divider R1, and is connected with delay protection switch S 1; 7805 three-terminal voltage-stabilizing chips in the constant current output circuit obtain constant current as the 5V constant pressure source through resistance R 3, expand stream through tunable expansion current circuit again, and the electric current of regulating output through potentiometer R2 is to laser diode.

2. according to the driving power that is used for diode-pumped laser of a kind of efficient, the compact described in the claim 1, it is characterized in that: described step-down anti-overflow circuit is to be connected on respectively in transformer and the secondary coil by a transformer and two PTC resistance to constitute.

3. the driving power that is used for diode-pumped laser of a kind of efficient, compact according to claim 1, it is characterized in that: bridge circuit and a polar capacitor that described current rectifying and wave filtering circuit is made up of 4 diodes constitute.

4. the driving power that is used for diode-pumped laser of a kind of efficient, compact according to claim 1, it is characterized in that: described tunable expansion current circuit is made up of a potentiometer and a power tube.

5. the driving power that is used for diode-pumped laser of a kind of efficient, compact according to claim 1; It is characterized in that: described constant current output circuit is one 7805 three-terminal voltage-stabilizing chip; And the input of 7805 chips is connected to an electric capacity, and output is connected to a resistance R 3 and an electric capacity.

6. according to the driving power that is used for diode-pumped laser of any described a kind of efficient, compact in the claim 1 to 5, it is characterized in that: the resistance of resistance R 1 is chosen between 0.5 Ω-1.5 Ω; The adjustable Standard resistance range of potentiometer R2 is at 0 Ω-5 Ω; The resistance of resistance R 3 is 1 Ω.