TWI648931B - Laser apparatus and method for generating laser by using the laser apparatus - Google Patents

Abstract

The invention provides a laser device and a laser generating method. The laser device generates a trigger signal based on the laser modulation signal. In addition, the laser device synchronizes the optical pumping device according to the trigger signal to emit the pumping light to the gain medium.

Description

Laser device and method for producing laser using the same

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a laser device and a laser generating method using the same, and relates to a method for generating a lightning beam by supplying pumping light to a gain medium in a manner that does not damage the gain medium of the laser device. The technique of shooting light.

Generally, the laser processing process is a process of processing the shape or physical properties of the surface of the object to be processed by scanning the laser light toward the surface of the object to be processed. There are various examples of such an object to be processed, and the shape thereof may be a two-dimensional planar shape. Examples of the laser processing process include a patterning process for forming a pattern on the surface of the object to be processed, a process for deforming the physical properties of the object to be processed, and heating the object to be processed by a laser to change the shape of the object to be processed. The process, the process of cutting the object to be processed by laser light, and the like.

A laser (LASER) device is a mechanical device that is produced by utilizing a phenomenon of stimulated emission of light to generate laser light. The laser is excited by the main oscillator and the laser is emitted in a form in which the beam has coherence. The laser device is effectively utilized in the entire industry including the manufacturing process due to the monochromaticity and coherence characteristics of the laser. In addition, it is widely used to accurately cut the skin or perform surgery. A medical device that selectively excises a portion of body tissue.

The laser device can generate laser light only by the above-described main oscillator, but a Gain medium is used to amplify the energy of the laser light in order to emit a strong intensity of the laser light. The laser device injects excitation energy into the gain medium by means of a light pumping operation. Thus, electrons inside the gain medium are excited by the light pumping operation to generate laser light.

However, during the optical pumping process inside the gain medium, the gain medium generates heat. Further, when energy larger than the allowable value is injected into the inside of the gain medium, there is a problem that the gain medium is burned.

[Question to be solved by the invention]

In the process of generating laser light by using a gain medium, the gain medium is prevented from being damaged due to high temperature.

[Means for solving the problem]

In one aspect, a laser device is provided, comprising: a laser modulation signal generator for generating a laser modulation signal; and a first trigger signal generator for receiving the laser modulation signal to generate a first trigger signal a second trigger signal generator that receives the laser modulation signal to generate a second trigger signal; and a seed laser generating device that emits seed laser light to the gain medium by synchronizing the first trigger signal; and optical pumping The device emits pumping light to the gain medium by synchronizing the second trigger signal.

The above optical pumping device may include a laser diode.

The optical pumping device may further include a current supply unit that supplies a current to the laser diode, and the current supply unit changes the current level by synchronizing the second trigger signal.

The second trigger signal generator may generate the second trigger signal after receiving the laser modulation signal and after a specific delay time.

The first trigger signal generator may generate the first trigger signal after receiving the laser modulation signal and after the first delay time, and the second trigger signal generator receives the laser modulation signal and passes the second After the delay time, the second trigger signal is generated, and the second delay time is greater than the first delay time.

The above optical pumping device can emit the pumping light as pulsed light.

The pulse width of the pulsed light described above may depend on a predetermined amplification ratio of the above-described seed laser light.

The optical pumping device can terminate the emission of the pulsed light at any point in time before the intensity of the seed laser light having the highest intensity of the seed laser light to the maximum of the seed laser light.

In another aspect, a laser generating method is provided, comprising the steps of: generating a laser modulation signal; generating a first trigger signal according to the laser modulation signal; and performing the laser modulation according to the foregoing a step of generating a second trigger signal by the signal; a step of emitting seed laser light to the gain medium by synchronizing the first trigger signal; and emitting pumping light to the gain medium by synchronizing the second trigger signal step.

The step of emitting the pumping light to the gain medium may change the current level supplied to the laser diode by the second trigger signal.

The step of generating the second trigger signal may generate the second trigger signal after receiving the laser modulation signal and after a specific delay time.

The step of generating the first trigger signal may be performed after receiving the laser modulation signal and after the first delay time, generating the first trigger signal, and the step of generating the second trigger signal is performed after receiving the laser modulation signal After the second delay time, the second trigger signal is generated, and the second delay time is greater than the first delay time.

The step of emitting the pumping light to the gain medium may emit the pumping light as pulsed light.

The pulse width of the pulsed light described above may depend on the amplification ratio of the predetermined seed laser light.

The step of emitting the pump light to the gain medium may terminate the emission of the pulse light at any point in time before the seed laser light having the highest intensity of the seed laser light is maximized and when the intensity of the seed laser light is maximized. .

[Effects of the Invention]

According to an exemplary embodiment, the optical pumping device can emit pumping light to the gain medium by trigger signal synchronization. Thereby, excessive energy can be prevented from being stored in the gain medium. Moreover, the power consumption of the optical pumping device can be reduced.

In the following drawings, the same reference numerals are given to the same components, and the size of each component may be exaggerated in the drawing for clarity and convenience of description. On the other hand, the embodiments described below are merely examples, and various modifications can be made according to such embodiments.

The first and second terms can be used to describe various constituent elements, but the constituent elements should not be limited by the terms. The term is used only for the purpose of distinguishing one component from another component.

If not explicitly indicated in the text, the singular expression includes the plural expression. In addition, when a part is "included" as a component, unless otherwise stated, it means that it may include other components, and does not mean that other components are excluded.

Further, terms such as "parts" and "modules" described in the specification refer to units that process at least one function or operation.

Fig. 1 is a view showing a laser device of a comparative example.

Referring to FIG. 1, the laser device of the comparative example may include a seed laser generating device 10 that generates a seed laser. The seed laser generating device 10 can generate laser light pulses. The seed laser generating device 10 can transmit laser light pulses to the gain medium 20 via the optical fiber 22.

The laser device of the comparative example may include an optical pumping device 30 that supplies energy to the gain medium 20. The optical pumping device 30 can increase the energy stored in the gain medium 20 by irradiating light to the gain medium 20. The gain medium 20 can amplify the seed laser light received from the seed laser generating device 10. The gain medium 20 can emit the same output optical signal S2 having the same shape as the seed laser light signal S1 by amplifying the seed laser light signal S1.

According to the comparative example, the optical pumping device 30 can continuously emit the pumping light of a fixed intensity to the gain medium 20. Therefore, as the time during which the optical pumping device 30 emits the pumping light to the gain medium 20 increases, the energy stored in the gain medium 20 increases. If the seed laser light is irradiated to the gain medium 20, the gain medium 20 can amplify the seed laser light by the energy stored in the gain medium 20 and emit it as the output laser light.

If the gain medium 20 emits the output laser light, the energy stored in the gain medium 20 is released to the outside. Therefore, when the seed laser light is irradiated to the gain medium 20 in a periodic pulse shape, the energy stored in the gain medium 20 can be periodically repeatedly reduced and increased. However, if the seed laser light is irradiated to the gain medium 20 non-periodically, excessive energy is supplied to the gain medium 20 in a section where the irradiation time interval of the seed laser light is long.

FIG. 2 is a view showing changes in energy inside the gain medium 20 when the seed laser light is generated non-periodically in the laser device of the comparative example.

In Fig. 2, (a) is a graph showing changes in the output power of the seed laser light emitted from the seed laser generating device 10 with time. Further, the graph (b) is a graph showing that the output power of the pump light emitted to the gain medium 20 by the optical pumping device 30 changes with time. Further, the (c) graph is a graph showing that the energy stored in the gain medium 20 changes with time.

Referring to FIG. 2, the optical pumping device 30 can emit a fixed intensity pumping light to the gain medium 20. In this case, the output power of the output laser light emitted from the gain medium 20 can be adjusted by adjusting the intensity of the pump light. Referring to the (c) graph, the energy stored in the gain medium 20 due to the pumping light being irradiated to the gain medium 20 is increased. Further, when the seed laser light is incident on the gain medium 20, the output laser light is emitted from the gain medium 20, and the energy stored in the gain medium 20 is drastically reduced.

While the seed laser light is periodically incident on the gain medium 20, the energy stored in the gain medium 20 also periodically increases and decreases. Therefore, the energy stored in the gain medium 20 does not increase above a fixed amount. However, in the section where the seed laser light is incident non-periodically to the gain medium 20, the energy stored in the gain medium 20 continues to increase during the period when the seed laser light is not incident. Further, if the time for not emitting the seed laser light becomes long, the energy stored in the gain medium 20 becomes too high.

If the energy stored in the gain medium 20 becomes too high, the gain medium 20 may be damaged by overheating. For example, if the energy stored in the gain medium 20 becomes higher than the allowable value, a phenomenon of stimulated Brillouin scattering occurs inside the gain medium 20. That is, in the inside of the gain medium 20, the incident light and the scattered light are nonlinearly combined and amplified, thereby causing a high temperature phenomenon of the gain medium 20.

FIG. 3 is a diagram showing a laser device 100 of an exemplary embodiment.

Referring to FIG. 3, the laser device 100 of the exemplary embodiment may include: a laser modulation signal generator 110 that generates a laser modulation signal; and a first trigger signal generator 122 that receives a laser modulation signal to generate a first a trigger signal; the second trigger signal generator 132 receives the laser modulation signal to generate a second trigger signal; and the seed laser generating device 124 emits the seed laser light to the gain medium by synchronizing the first trigger signal; and The optical pumping device 134 emits pumping light to the gain medium by synchronizing the second trigger signal.

The laser modulation signal generator 110 can generate a specific pulse signal as a laser modulation signal. The laser modulation signal can be generated periodically or non-periodically. The laser modulation signal of the laser modulation signal generator 110 may be a signal for causing the laser device 100 to output laser light.

The first trigger signal generator 122 can receive the laser modulation signal from the laser modulation signal generator. If the first trigger signal generator 122 receives the laser modulation signal, the first trigger signal may be generated. The first trigger signal generator 122 can send the first trigger signal to the seed laser generating device 124. The seed laser generating device 124 can be synchronized by the first trigger signal. The synchronization of the seed laser generating device 124 means that the operating state of the seed laser generating device 124 is changed. If the seed laser generating device 124 is synchronized by the first trigger signal, the operating state is changed and the seed can be emitted to the outside. laser.

The second trigger signal generator 132 can receive the laser modulation signal from the laser modulation signal generator. If the second trigger signal generator 132 receives the laser modulation signal, the second trigger signal may be generated. The second trigger signal generator 132 can send the second trigger signal to the optical pumping device 134. The optical pumping device 134 can be synchronized by the second trigger signal. The synchronization of the optical pumping device 134 means that the operating state of the optical pumping device 134 is changed.

For example, the optical pumping device 134 may include a laser diode 134b and a current supply portion 134a that supplies a current to the laser diode 134b. The current supply unit 134a of the optical pumping device 134 can change the current level supplied to the laser diode 134b by synchronizing the second trigger signal. The current level supplied to the laser diode 134b is changed by the current supply unit 134a, and the light energy emitted from the laser diode 134b to the gain medium 138 changes.

The seed laser generating device 124 can emit the seed laser light to the gain medium 138 by synchronizing the first trigger signal. The seed laser generating device 124 can internally include a main oscillator. The seed laser generating device 124 is stimulated to emit light by the main oscillator, whereby the collimated laser light can be emitted as seed laser light. The intensity of the seed laser light emitted from the seed laser generating device 124 may be in the shape of a pulse. The seed laser light can be emitted periodically or non-periodically.

By way of example, the gain medium 138 may include active ions obtained from rare earth elements such as Yb, Nd, Er, Tm, and the like. Also, as an example, the gain medium 138 may also include active ions obtained from transition metal elements such as chromium (Cr), titanium (Ti), and the like.

The gain medium 138 may be an active ion doped with a rare earth element such as Yb, Nd, Er, Tm, or the like, or freely available as chromium (Cr) or titanium. A state of an active ion obtained by a transition metal element such as (Ti). The gain medium 138 can amplify the seed laser light using the energy received from the optical pumping device 134 to emit the output laser light.

The optical pumping device 134 can emit the pumping light to the gain medium 138 by synchronizing the second trigger signal. The energy supplied by the optical pumping device 134 to the gain medium 138 can be determined based on the time at which the pumping light is irradiated. Each time the optical pumping device 134 senses the second trigger signal, the pumping light can be emitted to the gain medium 138 in a single pulse configuration. That is, each time the optical pumping device 134 senses the second trigger signal, it can emit impulse light to the gain medium 138. The time interval at which the optical pumping device 134 emits the pulsed light may depend on the time interval at which the second triggering signal is generated. Moreover, the pulse width of the pulsed light emitted by the optical pumping device 134 may depend on the output power of the predetermined output laser light. For example, when the amplification ratio between the seed laser light and the output laser light is large, the pulse width of the pulse light is relatively large. Conversely, when the amplification ratio between the seed laser light and the output laser light is small, the pulse width of the pulse light is relatively small.

4 is a diagram exemplarily showing a laser modulation signal, a first trigger signal, and a second trigger signal.

In FIG. 4, (a) is a graph showing changes in the intensity of the laser modulation signal generated in the laser modulation signal generator 110 with time. And, (b) the graph is a graph indicating that the intensity of the first trigger signal changes with time. And, (c) the graph is a graph indicating that the intensity of the second trigger signal changes with time.

Referring to FIG. 4, if a laser modulation signal is generated, a first trigger signal and a second trigger signal are generated correspondingly. The first trigger signal and the second trigger signal may be electrical pulse signals. The first trigger signal generator 122 and the second trigger signal generator 132 can generate the first trigger signal and the second trigger signal respectively from the laser modulation signal acquisition trigger. The pulse width of the first trigger signal and the second trigger signal may be narrower than the pulse width of the laser modulation signal.

The first trigger signal generator 122 may generate the first trigger signal after a specific delay time d after sensing the laser modulation signal. Conversely, the second trigger signal generator 132 can generate the second trigger signal immediately upon sensing the laser modulation signal. Therefore, the first trigger signal is generated later than the second trigger signal.

If the first trigger signal is delayed compared to the second trigger signal, the laser light is delayed to shoot the seed laser light. If the pump laser light is delayed by the pumping of the laser light, energy is stored in the gain medium 138 by pumping the light before the seed laser light is emitted. The gain medium 138 can amplify the seed laser light by utilizing the energy stored by pumping the light before ejecting the seed laser light. The magnification ratio of the seed laser light may depend on the energy stored in the gain medium 138. Also, the energy stored in the gain medium 138 may be before the seed laser light is incident on the gain medium 138, depending on when the pumping light is incident on the gain medium 138. In addition, it may depend on the pumping light illumination time required to amplify the seed laser light. Therefore, the delay time until the first trigger signal generator 122 senses the laser modulation signal to generate the first trigger signal may depend on the pumping light irradiation time required to amplify the seed laser light. In addition, the delay time until the first trigger signal generator 122 senses the laser modulation signal to generate the first trigger signal may also be changed according to the pulse width of the pumping light.

FIG. 5 is a diagram exemplarily showing a laser modulation signal, a first trigger signal, and a second trigger signal.

In FIG. 5, (a) is a graph showing changes in the intensity of the laser modulation signal generated in the laser modulation signal generator 110 with time. And, (b) the graph is a graph indicating that the intensity of the first trigger signal changes with time. And, (c) the graph is a graph indicating that the intensity of the second trigger signal changes with time.

Referring to FIG. 5, if a laser modulation signal is generated, a first trigger signal and a second trigger signal are generated correspondingly. The first trigger signal and the second trigger signal may be electrical pulse signals.

The first trigger signal generator 122 may generate the first trigger signal after the first delay time d1 after sensing the laser modulation signal. Conversely, the second trigger signal generator 132 may generate the second trigger signal after the second delay time d2 after sensing the laser modulation signal. The first delay time d1 may be greater than the second delay time d2. Therefore, the first trigger signal can be generated later than the second trigger signal.

The magnification ratio of the seed laser light may depend on the energy stored in the gain medium 138. Also, the energy stored in the gain medium 138 may be before the seed laser light is incident on the gain medium 138, depending on when the pumping light is incident on the gain medium 138. Therefore, the difference between the first delay time d1 and the second delay time d2 may depend on the pumping light irradiation time required to amplify the seed laser light. Further, the difference between the first delay time d1 and the second delay time d2 may be changed according to the pulse width of the pumping light.

6 and 7 are diagrams exemplarily showing the output of the laser modulation signal, the output power of the seed laser light, and the output power of the pump light.

In FIGS. 6 and 7, the graph (a) is a graph showing changes in the intensity of the laser modulation signal generated in the laser modulation signal generator 110 with time. Further, (b) the graph is a graph showing that the output power of the seed laser light emitted from the seed laser light generator changes with time. Further, the (c) graph is a graph showing that the output power of the pump light emitted from the optical pumping device 134 changes with time.

Referring to Figure 6, the seed laser light can be emitted more delayed than the pumping light. Moreover, each time the laser modulation signal is generated, both the pumping light and the seed laser light can be emitted in a pulsed form. The pumping light can be emitted at the point when the intensity of the seed laser light becomes maximum. As another example, referring to Fig. 7, the pumping light can be terminated before the seed laser light is generated.

That is, the pumping light can be emitted only from any point in the time interval from when the seed laser light is emitted to when the intensity of the seed laser light is maximum. As an example, the emission of the pump light may be ended before the intensity of the seed laser light is maximized or immediately before the seed laser light is emitted. If the pumping light is emitted only until the above time interval, the energy of the pumping light can be used to amplify the seed laser light. Therefore, after the seed laser light is amplified and output, excess energy can be prevented from remaining on the gain medium 138. Moreover, the amount of energy consumed by the gain medium 138 can also be reduced.

The timing at which the end of the pumping light is emitted can be made coincident with the time when the emission of the starting seed laser light is maximized by adjusting the pulse width of the pumping light and generating the time difference between the first trigger signal and the second trigger signal. If the pumping light is emitted only until the point at which the seed laser light is emitted or becomes the maximum, the energy stored in the gain medium 138 can be increased to amplify the ratio of the seed laser light. Also, the power required to emit the pumping light can be reduced.

Fig. 8 is a graph showing changes in the energy stored in the gain medium and the optical power of the output laser when the seed laser light and the pump light are emitted as shown in Fig. 6.

In Fig. 8, the graph (a) is a graph showing that the output power of the seed laser light changes with time. Further, (b) the graph is a graph showing that the output power of the pump light changes with time. Further, the (c) graph is a graph showing that the energy stored in the gain medium 138 changes with time. Further, the (d) graph is a diagram showing that the output power of the output laser light changes with time.

Referring to Fig. 8, the energy stored in the gain medium 138 increases during the emission of the pump light. Further, when the seed laser light is emitted, the energy output from the gain medium 138 to output the laser light and stored in the gain medium is reduced. The seed laser light is synchronized with the pumping light to be emitted, so that the energy stored in the gain medium does not exceed the allowable value. Further, the pumping light is emitted before the seed laser light is emitted. Therefore, when the seed laser light is emitted, energy for amplification can be stored in the gain medium 138. Moreover, after the seed laser light is emitted, the pumping light is not emitted, so that excess energy can be prevented from being stored in the gain medium 138.

Fig. 9 is a view showing a state in which seed laser light is emitted aperiodically.

In Fig. 9, (a) is a graph showing changes in the output power of the seed laser light over time. Further, (b) the graph is a graph showing that the output power of the pump light changes with time. Further, the (c) graph is a graph showing that the energy stored in the gain medium 138 changes with time. Further, the (d) graph is a graph showing that the output power of the output laser light changes with time.

Referring to Fig. 9, the pumping light is not emitted in the section where the seed laser light is not emitted. In the case of FIG. 2, if the seed laser light is emitted non-periodically when the pump light is fixedly emitted, the energy stored in the gain medium 138 may become excessive and the gain medium 138 may be damaged. However, in the case of FIG. 8, the pumping light is also emitted by the synchronization of the second trigger signal, so that the pumping light is not emitted during the time interval in which the seed laser light is not emitted. And, the amplification ratio of the seed laser light can be determined according to the pulse width of the pumping light. Therefore, it is possible to prevent the energy stored in the gain medium 138 from becoming excessive.

FIG. 10 is a flowchart showing a laser generating method of the laser device 100 described with reference to FIGS. 3 to 9.

When the embodiment of Fig. 10 is explained, the contents overlapping with Figs. 3 to 9 are omitted.

Referring to FIG. 10, the laser generating method of the exemplary embodiment may include the following steps: a step 1110 of generating a laser modulation signal; a step 1120 of generating a first trigger signal according to the laser modulation signal; and adjusting according to the laser a step 1130 of generating a second trigger signal by the signal; a step 1140 of emitting the seed laser light to the gain medium 138 by synchronizing the first trigger signal; and pumping the pump to the gain medium 138 by synchronizing the second trigger signal Step 1150 of light.

In step 1110, the laser modulation signal generator 110 can generate a laser modulation signal. The laser modulation signal can be generated periodically or non-periodically as a specific pulse signal.

In step 1120, the first trigger signal generator 122 can receive the laser modulation signal to generate the first trigger signal. The first trigger signal can synchronize the seed laser generating device 124.

In step 1130, the second trigger signal generator 132 can receive the laser modulation signal to generate a second trigger signal. The second trigger signal can synchronize the optical pumping device 134.

The first trigger signal and the second trigger signal may be generated after different delay times after the laser modulation signal is generated. For example, the first trigger signal may be generated later than the second trigger signal. In addition, the seed laser light can be emitted delayed by the pumping light.

In step 1140, the seed laser generating device 124 can emit seed laser light to the gain medium 138. Also, in step 1150, the optical pumping device 134 can emit pumping light to the gain medium 138. The timing at which the seed laser light and the pump light are emitted may be determined according to the time points at which the first trigger signal and the second trigger signal are generated.

Each time the second trigger signal is received, the optical pumping device 134 can emit the pumping light as pulsed light to the gain medium 138. The pulse width of the pulsed light may depend on the amplification ratio of the given seed laser light. Further, in step 1140, the optical pumping device 134 may terminate the emission of the pumping light that emits the pulsed light when the intensity of the seed laser light is maximum. As described above, by adjusting the emission of the pump light, the power consumption of the pump light can be reduced, and the energy stored in the gain medium 138 can be efficiently managed.

The laser device of the comparative example and the exemplary embodiment and the laser generating method using the laser device have been described above with reference to Figs. 1 to 10 . According to an embodiment, the optical pumping device 134 can emit pumping light to the gain medium 138 by trigger signal synchronization. Thereby, excessive energy can be prevented from being stored in the gain medium 138. Also, the power consumption of the optical pumping device 134 can be reduced.

In the above description, various matters are specifically described, but these matters are not intended to limit the scope of the invention, and should be construed as an example of a preferred embodiment. Therefore, the scope of the invention should not be limited by the illustrated embodiments, but should be defined by the technical idea recited in the claims.

10, 124‧‧‧ Seed laser generating device

20, 138‧‧‧ Gain media

22‧‧‧ fiber

30, 134‧‧‧ optical pumping device

100‧‧‧ Laser device

110‧‧‧Laser Modulation Signal Generator

122‧‧‧First trigger signal generator

132‧‧‧Second trigger signal generator

134a‧‧‧ Current Supply Department

134b‧‧‧Laser diode

1110, 1120, 1130, 1140, 1150‧‧ steps

d‧‧‧Delayed time

D1‧‧‧First delay time

D2‧‧‧second delay time

S1‧‧ seed laser light signal

S2‧‧‧ output optical signal

Fig. 1 is a view showing a laser device of a comparative example. FIG. 2 is a view showing changes in energy inside the gain medium when the seed laser light is generated non-periodically in the laser device of the comparative example. Fig. 3 is a view showing a laser device of an exemplary embodiment. 4 is a diagram exemplarily showing a laser modulation signal, a first trigger signal, and a second trigger signal. FIG. 5 is a diagram exemplarily showing a laser modulation signal, a first trigger signal, and a second trigger signal. 6 and 7 are diagrams exemplarily showing the output of the laser modulation signal, the output power of the seed laser light, and the output power of the pump light. Fig. 8 is a graph showing changes in the energy stored in the gain medium and the optical power of the output laser when the seed laser light and the pump light are emitted as shown in Fig. 6. Fig. 9 is a view showing a state in which seed laser light is emitted aperiodically. FIG. 10 is a flow chart showing a laser generating method using the laser device described with reference to FIGS. 3 to 9.

Claims (13)

A laser device includes: a laser modulation signal generator for generating a laser modulation signal; a first trigger signal generator for receiving the laser modulation signal to generate a first trigger signal; and a second trigger signal generator Receiving the laser modulation signal to generate a second trigger signal; the seed laser generating device emits seed laser light to the gain medium by synchronizing the first trigger signal; and the optical pumping device The second trigger signal is synchronized to emit pumping light to the gain medium, wherein the second trigger signal generator generates the second trigger after receiving a predetermined delay time after receiving the laser modulation signal Signal. The laser device of claim 1, wherein the optical pumping device comprises a laser diode. The laser device of claim 2, wherein the optical pumping device further comprises a current supply portion that supplies current to the laser diode, the current supply portion being driven by the second trigger The signal is synchronized to change the current level. The laser device of claim 1, wherein the first trigger signal generator generates the first trigger signal after receiving the laser modulation signal and after a first delay time, The second trigger signal generator generates the second trigger signal after receiving the laser modulation signal and after a second delay time No. The second delay time is greater than the first delay time. The laser device of claim 1, wherein the optical pumping device emits the pumping light as pulsed light. The laser device of claim 5, wherein the pulse width of the pulsed light depends on a predetermined amplification ratio of the seed laser light. The laser device of claim 5, wherein the optical pumping device is at any point in a time interval from when the seed laser light is to be generated until the intensity of the seed laser light becomes maximum. The emission of the pulsed light is ended. A laser generating method includes: a step of generating a laser modulation signal; a step of generating a first trigger signal according to the laser modulation signal; and a step of generating a second trigger signal according to the laser modulation signal a step of emitting seed laser light to the gain medium by synchronizing the first trigger signal; and a step of emitting pump light to the gain medium by synchronizing the second trigger signal, wherein the generating The step of the second trigger signal generates the second trigger signal after a specific delay time is received after receiving the laser modulation signal. The laser generating method of claim 8, wherein the step of emitting the pumping light to the gain medium changes a current level supplied to the laser diode by the second trigger signal . The method for generating a laser according to claim 8, wherein the step of generating the first trigger signal generates the first trigger signal after receiving the laser modulation signal and after a first delay time, The step of generating the second trigger signal generates the second trigger signal after receiving the laser modulation signal and after a second delay time, where the second delay time is greater than the first delay time. The laser generating method of claim 8, wherein the step of emitting the pumping light to the gain medium emits the pumping light as pulsed light. The laser generating method of claim 11, wherein the pulse width of the pulsed light depends on a predetermined amplification ratio of the seed laser light. The method of producing a laser according to claim 11, wherein the step of ejecting the pumping light to the gain medium until the intensity of the seed laser light is about to be generated immediately before the seed laser light is generated At any one of the largest time intervals, the emission of the pulsed light is ended.