CN217036311U - Repetition frequency adjustable optical fiber laser with stable single pulse energy - Google Patents
Repetition frequency adjustable optical fiber laser with stable single pulse energy Download PDFInfo
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- CN217036311U CN217036311U CN202220749000.1U CN202220749000U CN217036311U CN 217036311 U CN217036311 U CN 217036311U CN 202220749000 U CN202220749000 U CN 202220749000U CN 217036311 U CN217036311 U CN 217036311U
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Abstract
The utility model provides a repetition frequency adjustable optical fiber laser with stable single pulse energy, which comprises an electric drive seed source, a multistage amplifier and an output head, wherein the multistage amplifier is arranged between the electric drive seed source and the output head, a frequency selecting device is arranged between the multistage amplifier and the output head, the frequency selecting device is used for discontinuous adjustment of repetition frequency, and the repetition frequency of the electric drive seed source is fixed and unchanged. The utility model has simple structure, and realizes that the single pulse energy is kept unchanged when the laser repeats frequency adjustment only by adding an acousto-optic switch on the existing structure.
Description
Technical Field
The utility model belongs to the field of fiber lasers, and particularly relates to a repetition frequency adjustable fiber laser with stable single pulse energy.
Background
With the rapid development of laser technology, laser light sources have been applied to various industries in the society. The pulse laser is widely applied to the fields of material processing, substance spectrum detection, national defense photoelectric countermeasure and the like due to the advantages of high peak power and the like.
At present, the pulse laser is generally generated by adopting an active modulation (acousto-optic or electro-optic modulation) and a passive modulation mode. When the repetition frequency of the laser changes, the energy of a single pulse changes. Two conditions of single pulse energy stability and repetition frequency adjustability cannot be considered simultaneously. The application of laser can be affected by the varying single pulse energy, for example, the processing effect can be differentiated due to different pulse energy in the processing process.
A typical pulsed laser generally includes an electrically driven seed source, a multi-stage amplifier, and an output head. The electric drive seed source is responsible for generating light pulses with different repetition frequencies, the multistage amplifier is responsible for amplifying the laser pulses, and the output head is responsible for outputting the laser. The electric drive seed source is a main core component of the laser, and drives the semiconductor laser of the seed source to work through an electric signal so as to enable the electric drive seed source to emit laser pulses with the same repetition frequency as the drive electric signal. By adjusting the repetition frequency of the driving electrical signal, laser repetition frequency adjustment can be achieved. However, after seed lasers with different repetition frequencies pass through the same amplifier, amplification effects obtained by single pulses are different along with the change of repetition frequencies, so that the single pulse energy output by the lasers under different repetition frequencies is different. The laser single pulse energy finally output by the laser changes along with the repetition frequency adjustment, which brings inconvenience to the application of subsequent laser.
Disclosure of Invention
Aiming at the technical problems in the prior art, the utility model provides a repetition frequency adjustable optical fiber laser with stable single pulse energy, which adopts two-stage active modulation, wherein the former stage active modulation is responsible for generating high repetition frequency laser with fixed repetition frequency and consistent single pulse energy, and the latter stage active modulation is used as an optical switch to adjust the repetition frequency of output pulses after synchronous processing, so that the repetition frequency can be adjusted discontinuously on the premise of realizing stable single pulse energy output by the pulse laser.
The technical scheme adopted by the utility model is as follows: a repetition frequency adjustable optical fiber laser with stable single pulse energy comprises an electric drive seed source, a multistage amplifier and an output head, wherein the multistage amplifier is arranged between the electric drive seed source and the output head, a frequency selecting device is arranged between the multistage amplifier and the output head and used for repetition frequency intermittent adjustment, and the repetition frequency of the electric drive seed source is fixed and unchanged.
Furthermore, the frequency-selecting device adopts an acousto-optic switch.
Compared with the prior art, the utility model has the following beneficial effects: the utility model arranges a frequency selecting device between the multistage amplifier and the output head, and keeps the repetition frequency of the electric drive seed source constant, after the seed laser output by the electric drive seed source is amplified by the multistage amplifier, the laser single pulse energy is consistent, and the frequency selecting device adopts an acousto-optic switch to perform the intermittent adjustment of the repetition frequency. The electric driven seed source and the acousto-optic switch are adopted to carry out two-stage active modulation, so that the single pulse energy of the laser pulse output by the laser does not change along with the change of the repetition frequency. The utility model has simple structure, and realizes that the single pulse energy is kept unchanged when the laser repeats frequency adjustment only by adding an acousto-optic switch on the existing structure.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
fig. 2 is a schematic diagram of frequency selection according to an embodiment of the present invention.
In the figure, 1 is an electrically driven seed source, 2 is a multistage amplifier, 3 is an output head, and 4 is a frequency selection device.
Detailed Description
In order to make the technical solutions of the present invention better understood, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The embodiment of the utility model provides a single-pulse energy-stable repetition frequency adjustable fiber laser, which comprises an electrically driven seed source 1, a multistage amplifier 2, a frequency selection device 4 and an output head 3, as shown in fig. 1. Along the transmission direction of laser signals, a multistage amplifier 2, a frequency selecting device 4 and an output head 3 are sequentially arranged behind the electrically driven seed source 1. The frequency selecting device 4 adopts an acousto-optic switch for the intermittent adjustment of the repetition frequency. The repetition frequency of the electrically driven seed source 1 is fixed.
In operation, the frequency selection process is shown in fig. 2. In this embodiment, the electrically driven seed source 1 can operate in a high repetition frequency mode without frequency adjustment during operation. The electrically driven seed source 1 outputs a high repetition frequency seed laser of a fixed frequency. The single pulse energy of the high repetition frequency seed laser is small, and the high repetition frequency seed laser is amplified by the multistage amplifier 2 to obtain a laser pulse with high pulse energy. The amplified laser pulses have the same single pulse energy because the repetition frequency is unchanged. The amplified laser pulse passes through an acousto-optic switch, the acousto-optic switch is controlled to be synchronous with an electric modulation signal of the electric drive seed source 1, and then the repetition frequency of the acousto-optic switch is adjusted, so that discontinuous laser pulse repetition frequency adjustment is realized. The output head 3 emits laser pulses of high pulse energy after frequency adjustment.
The present invention has been described in detail with reference to the embodiments, but the description is only illustrative of the present invention and should not be construed as limiting the scope of the utility model. The scope of protection of the utility model is defined by the claims. The technical solutions of the present invention or those skilled in the art, based on the teachings of the technical solutions of the present invention, should be within the scope of the present invention, and the claims of the present invention should also cover the scope of the present invention by designing similar technical solutions to achieve the above technical effects or by making equivalent changes and improvements in the scope of the present invention.
Claims (2)
1. The utility model provides a stable repetition frequency of monopulse energy can fiber laser, includes electric drive seed source, multistage amplifier and output head, be provided with multistage amplifier between electric drive seed source and the output head which characterized in that: and a frequency selection device is arranged between the multistage amplifier and the output head and is used for intermittent adjustment of repetition frequency, and the repetition frequency of the electrically driven seed source is fixed and unchanged.
2. The single pulse energy stabilized re-frequency tunable fiber laser of claim 1, wherein: the frequency selection device adopts an acousto-optic switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220749000.1U CN217036311U (en) | 2022-04-02 | 2022-04-02 | Repetition frequency adjustable optical fiber laser with stable single pulse energy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220749000.1U CN217036311U (en) | 2022-04-02 | 2022-04-02 | Repetition frequency adjustable optical fiber laser with stable single pulse energy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217036311U true CN217036311U (en) | 2022-07-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220749000.1U Active CN217036311U (en) | 2022-04-02 | 2022-04-02 | Repetition frequency adjustable optical fiber laser with stable single pulse energy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217036311U (en) |
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2022
- 2022-04-02 CN CN202220749000.1U patent/CN217036311U/en active Active
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