TWI769950B - Pulse seed laser tunable wavelength circuit module and wavelength control method thereof - Google Patents

Abstract

The present invention relates to a pulse seed laser adjustable wavelength circuit module and a wavelength control method thereof. After the pulse seed laser diode of the pulse seed laser wavelength adjustable circuit is calibrated, it can be energized to emit laser light. And use the microprocessor to analyze the thermistor temperature of the pulse seed laser diode. If the analyzed temperature does not match the temperature recorded by the microprocessor, the microprocessor will drive the temperature controller to transmit the temperature adjustment signal. To the cooling chip driving circuit, after the cooling chip driving circuit receives the temperature adjustment signal, it can drive the cooling chip of the pulse seed laser diode to adjust the temperature of the pulse seed laser diode, so that the pulse seed laser diode is The temperature of the laser diode is adjusted to match the temperature recorded by the microprocessor, and then the wavelength is adjusted according to the temperature, so that the pulsed seed laser diode can indeed emit laser light with the preset wavelength, thereby avoiding influence The output power of the pulsed seed laser diode improves the stability of the laser processing operation.

Description

Pulse seed laser tunable wavelength circuit module and wavelength control method thereof

The invention provides a pulse seed laser adjustable wavelength circuit module and a wavelength control method thereof, especially after the pulse seed laser diode emits laser light, the microprocessor is used to analyze the temperature, and the temperature controller is used to control the temperature. The cooling chip driving circuit drives the cooling chip of the pulse seed laser diode to adjust the temperature of the pulse seed laser diode, and then adjust the wavelength according to the temperature, so that the pulse seed laser diode emits in accordance with the preset wavelength of laser light.

Press, with the advent of the high-tech era, the processing technology of industrial manufacturing and production has also been continuously improved. The traditional mechanical processing process can only process the appearance of the processed object, but the processing, engraving or cutting of the processed object cannot be processed. In addition, the drilling and cutting of high-tech semiconductor products, such as chips, components, and thin plate parts, cannot be processed. Therefore, the laser processing process has been developed and developed, and the process is widely used, such as medical, high-tech, etc. Precision industry, excitation detection, spectroscopic analysis or plasma dynamics can all be processed by lasers. Traditional laser processing cannot avoid mechanical clamping of lenses, high-precision translation stages, etc. However, through optical lasers For laser processing operations of pulsed light, fiber lasers are widely used in the process of material processing because of the advantages of compact structure, high efficiency and the ability to generate laser beams with high radiation quality. It has the advantages of very good stability, small size, easy to carry and easy to erect, so it is suitable for optical communication, spectral measurement and so on. And the application of optical analysis occupies a place, and because of its very high good collimation, high power and high light intensity, it also makes the laser source processing system widely used in industry.

However, in the current laser processing operation, the output power of the laser source applied in different laser processing processes will also be slightly different, and in the precise laser processing process, the allowable error range of the laser wavelength It is only about ±1nm. If the laser wavelength exceeds the range of ±1nm, the output power of the laser will be affected, and the total output power of the overall laser source will be affected, so that the laser processing process tends to be unstable, resulting in the impact of The overall production yield of the product.

Therefore, how to solve the above-mentioned deficiencies and inconveniences is the direction of research and improvement that the relevant practitioners in this industry are eager to study and improve.

Therefore, in view of the above deficiencies, the inventor collects relevant information, evaluates and considers from various parties, and designs this kind of pulse seed laser tunable wavelength circuit through continuous trial and modification with years of experience accumulated in this industry. The inventor of the module and its wavelength control method.

The main purpose of the present invention is that after the pulse seed laser diode of the pulse seed laser tunable wavelength circuit module of the pulse seed laser tunable wavelength circuit module is calibrated, the laser light can be energized to emit laser light, and The microprocessor analyzes and compares, if the thermistor temperature of the pulse seed laser diode is not equal to the temperature recorded by the microprocessor, the microprocessor will transmit an electronic signal to drive the thermostat , and make the temperature controller automatically transmit the temperature adjustment signal to the cooling chip drive circuit, so that after the cooling chip drive circuit receives the temperature adjustment signal, it can drive the cooling chip of the pulse seed laser diode to control the pulse seed The temperature of the laser diode is adjusted, so that the temperature of the pulse seed laser diode is automatically adjusted to meet the temperature recorded by the microprocessor, and then the temperature is adjusted by the temperature. Adjust the wavelength so that the pulsed seed laser diode can indeed emit laser light with a preset wavelength, so as to avoid affecting the output power of the pulsed seed laser diode, so as to achieve a reliable output of the laser processing operation. , the purpose of improving stability.

The secondary purpose of the present invention is that the pulse seed laser diode can directly use its own structure to adjust the temperature, and then adjust the wavelength by the temperature, so as to stabilize the laser wavelength, without the need for the pulse seed laser diode. The temperature of the pulse seed laser diode can be adjusted by additional settings on the emitter diode, and new structures and structures can be designed, so as to be applicable to various pulse seed laser diodes on the market, thereby achieving high applicability and reducing The purpose of manufacturing cost and improving economic cost-effectiveness.

1: Pulse seed laser adjustable wavelength circuit module

11: Microprocessor

111: Storage unit

12: Pulse Seed Laser Diode

121: Thermistor

122: Refrigeration wafer

123: Photodiode

13: Signal conversion circuit

14: Thermostat

141: heating adjustment button

142: Cooling adjustment button

15: Refrigeration chip drive circuit

2: Spectral display instrument

[Fig. 1] is a block diagram of the present invention.

[Fig. 2] is a flow chart of the present invention.

[Fig. 3] is a flowchart (1) of another embodiment of the present invention.

[Fig. 4] is a flowchart (2) of another embodiment of the present invention.

In order to achieve the above objects and effects, the technical means and structures adopted by the present invention are described in detail with reference to the preferred embodiments of the present invention, and the features and functions are as follows, so as to be fully understood.

Please refer to FIG. 1, which is a block diagram of the present invention. It can be clearly seen from the figure that the pulse seed laser tunable wavelength circuit module 1 of the present invention includes a microprocessor 11, a pulse seed laser two The pole body 12, the signal conversion circuit 13, the temperature controller 14 and the cooling chip driving circuit 15, in:

The microprocessor 11 (Microcontroller Unit; MCU) has a computing function and has a storage unit 111 inside.

The pulsed seed laser diode 12 includes a thermistor 121 (Thermistor), a cooling chip 122 (Thermoelectric Cooler; TEC), and a photodiode 123 (Photo Diode), wherein the thermistor 123 (Photo Diode) The resistance value of 121 will change with temperature, and the cooling chip 122 can control the temperature of the pulsed seed laser diode 12 to change the resistance value of the thermistor 121, and the photodiode 123 can Convert light energy into voltage.

The signal conversion circuit 13 can be an analog-to-digital converter circuit (ADC Circuit), and the signal conversion circuit 13 is coupled between the microprocessor 11 and the thermistor 121 of the pulse seed laser diode 12 , which can convert the The changed resistance value of the thermistor 121 is converted into a digital signal and transmitted to the microprocessor 11 for analysis.

The temperature controller 14 is connected to the microprocessor 11 and can receive the electronic signal transmitted from the microprocessor 11 to transmit a temperature adjustment signal, and the temperature controller 14 is electrically connected with a temperature rise adjustment button 141 that can be pressed and Cool down adjustment knob 142 .

The cooling chip driver circuit 15 (Thermoelectric Cooler Driver Circuit) is connected between the temperature controller 14 and the cooling chip 122 of the pulse seed laser diode 12 , and can receive the temperature adjustment transmitted from the temperature controller 14 . The signal is used to drive the cooling chip 122 to perform the temperature adjustment operation.

Please refer to FIG. 2 again, which is a flow chart of the present invention. It can be clearly seen from the figure that the wavelength control method of the pulse seed laser tunable wavelength circuit module 1 of the present invention is that the pulse seed laser can be used in advance. The pulse seed laser diode 12 of the adjustable wavelength circuit module 1 performs a preset wave Long (eg: basic wavelength 1064nm) calibration operation, in order to record the pulse seed laser diode 12 at the preset wavelength in the storage unit 111 of the pulse seed laser tunable wavelength circuit module 1 microprocessor 11 temperature, and then the calibrated pulse seed laser diode 12 is implemented according to the following steps:

(A) The circuit module 1 is first powered on to drive the pulse seed laser adjustable wavelength circuit module 1, so that the pulse seed laser diode 12 emits laser light. At this time, the thermal sensitivity inside the pulse seed laser diode 12 The resistor 121 senses the temperature change and changes the resistance value, and can convert the resistance value changed by the thermistor 121 into a digital signal through the signal conversion circuit 13 coupled to the thermistor 121, and then transmit it to the pulsed seed laser. The microprocessor 11 of the wavelength modulation circuit module 1 performs analysis, thereby analyzing the temperature of the pulse seed laser diode 12 when the pulse seed laser diode 12 emits laser light.

(B) If the temperature analyzed by the microprocessor 11 of the pulse seed laser tunable wavelength circuit module 1 is not equal to the temperature recorded by the storage unit 111 of the calibration operation, step (C) is executed. If the output temperature is equal to the temperature recorded by the storage unit 111, step (E) is executed.

(C) The microprocessor 11 of the pulse seed laser tunable wavelength circuit module 1 transmits electronic signals to the temperature controller 14 to drive the temperature controller 14 to transmit the temperature regulation signal to the cooling chip driving circuit 15 .

(D) After receiving the temperature adjustment signal, the cooling chip driving circuit 15 drives the cooling chip 122 to perform a temperature adjustment (heating or cooling) operation, so that the pulsed seed laser diode is driven by the cooling chip 122 After the temperature of the body 12 is adjusted to match the temperature recorded by the storage unit 111, step (E) can be executed.

(E) The wavelength is adjusted by temperature, and the pulsed seed laser diode 12 The laser light with the preset wavelength will be emitted, thereby completing the use of the present invention.

After the pulse seed laser diode 12 of the pulse seed laser adjustable wavelength circuit module 1 of the present invention is calibrated, it can be energized to emit laser light, and is analyzed and compared by the microprocessor 11. When the temperature of the pulsed seed laser diode 12 is not equal to the temperature recorded in the storage unit 111 of the microprocessor 11, the microprocessor 11 will transmit an electronic signal to drive the temperature controller 14, and the temperature control The device 14 will automatically transmit the temperature adjustment signal to the cooling chip driving circuit 15, so that after the cooling chip driving circuit 15 receives the temperature adjustment signal, it can drive the cooling chip 122 of the pulse seed laser diode 12 to control the pulse The seed laser diode 12 performs a temperature adjustment (heating or cooling) operation, so that the temperature of the pulsed seed laser diode 12 is automatically adjusted to meet the temperature recorded by the storage unit 111, and then the wavelength is adjusted by the temperature, so that the The pulsed seed laser diode 12 can indeed emit laser light with a predetermined wavelength, so as to avoid affecting the output power of the pulsed seed laser diode 12, thereby achieving laser processing operations (such as industrial, medical, Excitation detection, spectroscopic analysis or plasma dynamics, etc.) output the effect of reliable and stable improvement.

Furthermore, the pulse seed laser diode 12 of the pulse seed laser adjustable wavelength circuit module 1 of the present invention includes the thermistor 121 , the cooling chip 122 , and the photodiode 123 , which are known in the prior art. , so the present invention can directly use the structure of the pulse seed laser diode 12 to adjust the temperature, and then adjust the wavelength by the temperature, so as to stabilize the laser wavelength, without the need for the pulse seed laser diode. The temperature of the pulse seed laser diode 12 can be adjusted by additionally setting up and designing new structures and structures on the 12, so as to be applicable to various pulse seed laser diodes 12 on the market, so as to achieve high applicability and reduce manufacturing costs. , Improve the effectiveness of economic cost-effectiveness.

Please refer to Figures 3 and 4, which are flowcharts (1) and (2) of another embodiment of the present invention. It can be clearly seen from the figures that the calibration operation before step (A) of the present invention is , in order to follow the steps below:

(A01) The pulse seed laser diode 12 of the pulse seed laser adjustable wavelength circuit module 1 is powered on first, so that the pulse seed laser diode 12 emits laser light. The thermistor 121 inside the laser diode 12 will sense the temperature change and change the resistance value. At the same time, the signal conversion circuit 13 coupled to the thermistor 121 will convert the resistance value of the thermistor 121 into The digital signal is transmitted to the microprocessor 11 of the pulse seed laser adjustable wavelength circuit module 1 for analysis, so as to analyze the temperature of the thermistor 121 when the pulse seed laser diode 12 emits laser light.

(A02) Then use the external spectrum display device 2 (eg, a spectrum analyzer) to measure the voltage of the photodiode 123 inside the pulsed seed laser diode 12 to know the emitted light of the pulsed seed laser diode 12 The wavelength of the outgoing laser light, if the wavelength of the laser light emitted by the pulsed seed laser diode 12 does not conform to the preset value set by the user, step (A03) is executed, and if it conforms to the preset value, then Step (A05) is performed.

(A03) The microprocessor 11 of the pulsed seed laser tunable wavelength circuit module 1 will transmit an electronic signal to the temperature controller 14 to drive the temperature controller 14 to transmit a temperature regulation signal (heating or cooling) to the cooling chip drive circuit 15 .

(A04) After receiving the temperature adjustment signal, the cooling chip driving circuit 15 drives the cooling chip 122 of the pulse seed laser diode 12 to perform temperature adjustment operation, so as to change the pulse seed by the cooling chip 122 The temperature of the laser diode 12, and then the wavelength is adjusted by the temperature until the wavelength of the laser light emitted by the pulse seed laser diode 12 observed by the external spectrum display instrument 2 conforms to the preset wavelength set by the user , and then execute step (A05).

(A05) The microprocessor of the pulse seed laser tunable wavelength circuit module 1 11 indicates that the wavelength of the pulsed seed laser diode 12 can be recorded through the storage unit 111 to conform to the preset wave, thereby completing the calibration operation, and continuing to execute step (A).

Preferably, the thermostat 14 in the above step (A03) can transmit the temperature adjustment signal in a manual mode, and the thermostat 14 is electrically connected with a temperature increase adjustment button 141 and a temperature decrease adjustment button 142 that can be pressed by the user, so as to By pressing the heating adjustment button 141 or the cooling adjustment button 142, the temperature controller 14 transmits a heating or cooling signal to the cooling chip driving circuit 15, thereby changing the temperature when the pulsed seed laser diode 12 emits laser light, and then The wavelength is adjusted by the temperature, whereby the heating adjustment knob 141 or the cooling adjustment knob 142 can be used to adjust the wavelength of the laser light emitted by the pulsed seed laser diode 12 to meet the preset wavelength, but in practical application, A temperature correction program (not shown in the figure) can also be installed in the temperature controller 14 or in the microprocessor 11, so as to use the temperature correction program to automatically adjust the temperature when the pulsed seed laser diode 12 emits laser light. Then, the wavelength is adjusted by the temperature, so that the wavelength of the laser light emitted by the pulsed seed laser diode 12 is automatically adjusted to meet the preset wavelength, that is, manual adjustment is not required, and labor costs can be reduced.

Therefore, the above descriptions are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. The present invention is mainly aimed at the pulse seed laser diode of the pulse seed laser tunable wavelength circuit module 1 After the body 12 is energized to emit laser light, the microprocessor 11 is used to analyze the temperature of the thermistor 121 of the pulse seed laser diode 12. If the analyzed temperature does not match the temperature recorded in the calibration operation, the microprocessor 11 will 11 will drive the temperature controller 14 to transmit the temperature adjustment signal to the cooling chip driving circuit 15, so that the cooling chip driving circuit 15 can drive the cooling chip of the pulse seed laser diode 12 after receiving the temperature adjustment signal 122 to adjust the temperature of the pulse seed laser diode 12, so that the temperature of the pulse seed laser diode 12 is adjusted to meet the temperature recorded in the calibration operation, and then the wavelength is adjusted by the temperature, so that the pulse seed laser The diode 12 can indeed emit a symbol The laser light of the preset wavelength is combined to avoid affecting the output power of the pulsed seed laser diode 12, thereby achieving the effect of improving the stability of the laser processing operation. Therefore, all structures and devices that can achieve the aforementioned effects should be Such simple modifications and equivalent structural changes covered by the present invention should be similarly included in the patent scope of the present invention, and are hereby stated.

To sum up, the above-mentioned pulse seed laser tunable wavelength circuit module and its wavelength control method of the present invention can truly achieve its effect and purpose when it is used. Therefore, the present invention is an invention with excellent practicability. The application requirements for an invention patent should be filed in accordance with the law. We hope that the review committee will approve the case as soon as possible to protect the inventor's hard work. If the review committee has any doubts, please do not hesitate to send a letter for instructions. The inventor will do his best to cooperate. easy.

1: Pulse seed laser adjustable wavelength circuit module

11: Microprocessor

111: Storage unit

12: Pulse Seed Laser Diode

121: Thermistor

122: Refrigeration wafer

123: Photodiode

13: Signal conversion circuit

14: Thermostat

141: heating adjustment button

142: Cooling adjustment button

15: Refrigeration chip drive circuit

2: Spectral display instrument

Claims (7)

A pulse seed laser adjustable wavelength circuit module is provided with a microprocessor with a storage unit and a pulse seed laser diode. The pulse seed laser diode includes a resistance value that changes with temperature changes. The thermistor and the cooling chip for adjusting the temperature of the pulse seed laser diode, as well as the photodiode for converting light energy into voltage, are coupled between the microprocessor and the thermistor to thermally The resistance value of the resistance change is converted into a digital signal and transmitted to the signal conversion circuit of the microprocessor for analysis, and the microprocessor is also connected with a temperature controller for transmitting the temperature regulation signal, and the temperature controller and the pulse seed laser diode A cooling chip driving circuit is coupled between the cooling chips for receiving the temperature adjustment signal of the temperature controller to drive the cooling chips to perform the temperature adjustment operation. The pulse seed laser adjustable wavelength circuit module of claim 1, wherein the signal conversion circuit is an analog-to-digital converter circuit. The pulse seed laser adjustable wavelength circuit module as claimed in claim 1, wherein the temperature controller is electrically connected with a heating adjustment button and a cooling adjustment button for pressing. A wavelength control method for a pulse seed laser adjustable wavelength circuit module, wherein the pulse seed laser diode of the pulse seed laser adjustable wavelength circuit module is calibrated with a preset wavelength in advance, so as to be used in the pulse seed laser. The temperature of the pulse seed laser diode at the preset wavelength is recorded in the storage unit of the microprocessor of the tunable wavelength circuit module, and then the calibrated pulse seed laser diode is implemented according to the following steps: (A) The circuit module of the pulse-seed laser adjustable wavelength is powered on first, so that the pulse-seed laser diode emits laser light. At this time, the inside of the pulse-seed laser diode is The thermistor will sense the temperature change and change the resistance value, and can convert the resistance value changed by the thermistor into a digital signal through the signal conversion circuit coupled with the thermistor, and then transmit it to the pulse seed laser to adjust The microprocessor of the wavelength circuit module performs analysis, so as to analyze the temperature of the pulse seed laser diode when the pulse seed laser diode emits laser light; (B) If the temperature analyzed by the microprocessor of the pulsed seed laser adjustable wavelength circuit module is not equal to the temperature recorded by the storage unit during the calibration operation, step (C) is executed, and if the analyzed temperature is equal to the temperature recorded by the storage unit, then perform step (E); (C) The microprocessor of the pulse seed laser adjustable wavelength circuit module will transmit electronic signals to the temperature controller, so as to drive the temperature controller to transmit the temperature adjustment signal to the cooling chip driving circuit; (D) After receiving the temperature adjustment signal, the cooling chip driving circuit will drive the cooling chip to perform the temperature adjustment operation, so as to adjust the temperature of the pulsed seed laser diode to match the storage unit through the cooling chip After the recorded temperature, step (E) can be performed; (E) The wavelength is adjusted by temperature, and the pulsed seed laser diode will emit laser light with a preset wavelength. The wavelength control method of the pulse seed laser tunable wavelength circuit module according to claim 4, wherein the calibration operation before the step (A) can be performed according to the following steps: (A01) The pulse seed laser diode of the pulse seed laser adjustable wavelength circuit module is powered on first, so that the pulse seed laser diode emits laser light, At this time, the thermistor inside the pulse seed laser diode will sense the temperature change and change the resistance value, and at the same time, the signal conversion circuit coupled to the thermistor will convert the resistance value of the thermistor changed. It is converted into a digital signal and transmitted to the microprocessor of the pulse seed laser adjustable wavelength circuit module for analysis, so as to analyze the temperature of the thermistor when the pulse seed laser diode emits laser light; (A02) Then use the external spectrum display instrument to measure the voltage of the photodiode inside the pulse seed laser diode to know the wavelength of the laser light emitted by the pulse seed laser diode. If the wavelength of the laser light emitted by the emitter diode does not conform to the preset value set by the user, step (A03) is executed, and if it conforms to the preset value, step (A05) is executed; (A03) The microprocessor of the pulse seed laser adjustable wavelength circuit module will transmit electronic signals to the temperature controller, so as to drive the temperature controller to transmit the temperature adjustment signal to the cooling chip driving circuit; (A04) After receiving the temperature adjustment signal, the cooling chip driving circuit will drive the cooling chip of the pulse seed laser diode to perform temperature adjustment operation, so as to change the pulse seed laser diode by the cooling chip The temperature of the body is adjusted, and the wavelength is adjusted by the temperature until the wavelength of the laser light emitted by the pulsed seed laser diode observed by the external spectrum display instrument conforms to the preset wavelength set by the user, and then the step (A05) is performed. ; (A05) The microprocessor of the pulse seed laser tunable wavelength circuit module is transparent to the storage The storage unit is used to record that the wavelength of the pulsed seed laser diode conforms to the preset wavelength, thereby completing the calibration operation. The wavelength control method of the pulse seed laser adjustable wavelength circuit module according to claim 5, wherein the temperature controller in the step (A03) is electrically connected with a heating adjustment button and a cooling adjustment button for pressing, and pressing When the heating adjustment button or the cooling adjustment button is used, the temperature controller will transmit the heating or cooling signal to the driving circuit of the cooling chip. The wavelength control method of the pulse seed laser tunable wavelength circuit module according to claim 4, wherein the signal conversion circuit in the step (A) is an analog-to-digital converter circuit capable of converting the resistance change value into a digital signal.

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