A high signal-to-noise ratio time-division multiplexing-based front-end system for multi-output high-power laser devices

Abstract

This invention relates to a high signal-to-noise ratio (SNR) time-division multiplexing-based multi-output high-power laser device front-end system, comprising a laser seed source, a multi-beam splitting unit, an fiber amplifier, an electro-optic modulator, an arbitrary signal generator, a 1×N RF switch, an RF amplifier, and a digital delay generator. The digital delay generator sequentially triggers the laser seed source, the electro-optic modulator, the arbitrary signal generator, and the 1×N RF switch. Under the control of logic circuits, the 1×N RF switch distributes multiple electrical signals from the single-channel output of the arbitrary signal generator to multiple paths, which are then loaded onto multiple electro-optic modulators to achieve arbitrary shaping and output of many optical pulses. This invention not only solves the requirement of generating multiple pulse signals in high-power laser devices but also effectively solves the crosstalk problem between pulses through the 1×N RF switch distribution, which is beneficial for precise pulse shaping of the injected laser and improves the energy utilization rate of the laser pulse.

Description

Technical Field

[0001] This invention belongs to the field of laser technology, and specifically relates to a front-end system for a high signal-to-noise ratio, time-division multiplexed, multi-output high-power laser device. Background Technology

[0002] With the development of laser fusion actuators, the required number of output laser beams often ranges from tens to hundreds. One of the fundamental requirements for achieving inertial confinement fusion (ICF) is the spatial uniformity of the driving force on the target pellet. Therefore, whether driven directly or indirectly, multiple laser beams need to be synchronized and symmetrical to provide good illumination uniformity for the implosion of the target pellet. Thus, achieving power balance among multiple laser beams has become an important consideration for ICF laser actuators. As the seed source of the entire high-power laser device, the front-end system provides multiple high-quality seed laser pulses with preliminary shaping and independent controllability in time domain, frequency domain, polarization, signal-to-noise ratio, and other characteristics for subsequent systems. Since the development of the National Ignition Facility (NIF) in the United States, most high-power laser fusion actuators have adopted an all-fiber, all-solid-state overall scheme for the front-end.

[0003] The NIF device uses four sets of front-end seed sources to provide high-quality seed light for the entire device. After multi-stage fiber amplification and beam splitting, it achieves 192 laser outputs. Each output uses an amplitude modulator and an arbitrary signal generator (AWG) to time-shape the laser pulses. The time-shaping unit is located at the end of the seed light generation path of each output to improve the signal-to-noise ratio of the system. (G. Brunton, G. Erbert, D. Browning, and E. Tse. The shaping of a national ignition campaign pulsed waveform[J]. Fusion Engineering and Design, 2012, 87(12):1940-1944)

[0004] The front-end system of the French Laser Megajoule (LMJ) facility employs a fully polarization-maintaining fiber structure. Based on this, the LMJ has made improvements to enhance the signal-to-noise ratio. Before the improvement, an electro-optic modulator was used to pulse-shape the single-longitudinal-mode continuous laser, followed by a series of fiber amplifiers and modulators to generate highly stable nanosecond pulses. After the improvement, the LMJ's polarization-maintaining front-end system uses an acousto-optic modulator (AOM) to pulse-shape the single-longitudinal-mode continuous laser amplified to the watt level, significantly improving the signal-to-noise ratio of the output pulse. Furthermore, the LMJ facility contains 240 laser outputs, each equipped with an amplitude modulator and an AWG for time-shaping the laser pulses. (Gleyze JF, Hares J, Vidal S, et al. Recent advances in the front end sources of the LMJ fusion laser[J]. Proceedings of SPIE, 2011, 7916: 79160I.) Although the NIF and LMJ devices significantly improve the system output performance, they greatly increase the system cost.

[0005] The front-end systems of China's Shenguang II and Shenguang III devices generally adopt the technical route of "time division multiplexing and high-speed electro-optic modulation technology" to generate multiple main laser signals from the same source. A single channel of the AWG generates a series of multiple electrical signals for arbitrary shaping, which are then modulated by a high-speed electro-optic modulator to generate the required multiple optical pulse signals. After being amplified by an optical fiber amplifier and split into beams, the signals are sent to an acousto-optic modulator for selection and then injected into a pulse amplification system for subsequent transmission processing. (Wang Jianjun, Xu Dangpeng, Lin Honghuan, et al. A multi-beam optical pulse generation system based on time division multiplexing technology [J]. Acta Physica Sinica, 2010, 59(12): 8725-8732.) Although this method reduces the number of AWGs required by the system, the generation of multiple shaping pulses in the form of a pulse train means that the preceding pulses will affect the following pulses during the time shaping process. This effect will be amplified in the subsequent transmission process, resulting in a deterioration in pulse quality. Summary of the Invention

[0006] In view of this, the present invention proposes a high signal-to-noise ratio (SNR) multi-output high-power laser device front-end system based on time-division multiplexing. Specifically, a radio frequency (RF) switch is used to directly select the sequence of pulses after an arbitrary signal generator (AWG), and then the pulses pass separately through an RF amplifier and an electro-optic modulator. The electro-optic modulator simultaneously modulates the multiple pulsed lasers output after beam splitting from the laser seed source, ultimately achieving arbitrary shaping and output of many optical pulses. This scheme not only effectively solves the requirement of generating multiple signals in the front-end system of a high-power laser device, but also effectively solves the crosstalk problem between the pulses.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A high signal-to-noise ratio time-division multiplexing-based multi-output high-power laser device front-end system includes a laser seed source, an arbitrary signal generator, and a digital delay generator. It also includes a multi-beam splitting unit, an optical fiber amplifier group consisting of N optical fiber amplifiers, an electro-optic modulator group consisting of N electro-optic modulators, an radio frequency amplifier group consisting of N radio frequency amplifiers, and a 1×N radio frequency switch.

[0009] The pulsed laser output from the laser seed source is connected to a multi-beam splitting unit via fiber optic jumpers. Each of the N output terminals of the multi-beam splitting unit is connected to N fiber optic amplifiers via fiber optic jumpers. The pulsed laser amplified by the fiber optic amplifiers is then connected to an electro-optic modulator via fiber optic jumpers.

[0010] The sequence pulses generated by the arbitrary signal generator are connected to the 1×N RF switch via RF lines, and the sequence pulses are selected and cut into N single pulses. The N output terminals of the 1×N RF switch are each connected to N RF amplifiers via RF lines. The output electrical signals are used as modulation signals for N electro-optic modulators. The optical pulses shaped by the electro-optic modulators are the final output seed signals.

[0011] The digital delay generator generates a trigger signal through one of the following paths: one path is connected to the synchronous trigger input terminal of the laser seed source via an RF line; N paths are connected to the electrical input terminals of N electro-optic modulators via RF lines; one path is connected to the trigger signal input terminal of any signal generator via an RF line; and another path is connected to the input terminal of a 1×N RF switch. This 1×N RF switch accepts the synchronous trigger input and uses a logic control circuit to distribute and output multiple signals in a time-division manner.

[0012] The aforementioned laser seed source can be a directly output pulsed laser oscillator, or a laser system that combines a continuous laser with an optical switch to generate pulsed lasers. This laser source can accept external triggering to synchronously control the output time of the laser pulses.

[0013] The aforementioned multiplexer unit is an optical beam splitter unit with one input and multiple outputs based on optical fiber or waveguide.

[0014] The aforementioned fiber amplifier is an optical signal amplification system based on gain fiber and pump light source, which can be a single-stage amplification or a multi-stage cascade.

[0015] The electro-optic modulator described above is a modulation device that uses the electro-optic effect to modulate the characteristics of an electrical signal into the characteristics of an optical signal for output.

[0016] The arbitrary signal generator mentioned above is a programmable arbitrary electrical signal generator.

[0017] The aforementioned 1xN RF switch is an RF device with one input and multiple time-division output functions. It can accept external synchronous trigger input and realize the time-division output of multiple signals through logic control circuit.

[0018] The aforementioned RF amplifier is an RF device with high-speed electrical signal amplification capability, which can amplify the amplitude of the signal distributed by the signal generator via the RF switch to the amplitude required by the electro-optic modulator.

[0019] The aforementioned digital delay generator can generate multiple time-dependent, delay-adjustable time trigger signals, providing trigger inputs to the laser seed source, electro-optic modulator, arbitrary signal generator, and 1xN RF switch, enabling each module to operate at a specific time delay.

[0020] The laser seed source, multiplexer unit, fiber amplifier, and electro-optic modulator are connected by fiber optic patch cords and fiber optic flanges.

[0021] The advantages of this invention are as follows:

[0022] 1. This invention utilizes a radio frequency switch to select a sequence of pulses output from an arbitrary signal generator, which then pass through a radio frequency amplifier and an electro-optic modulator. The electro-optic modulator simultaneously modulates the split laser seed pulses, ultimately achieving arbitrary shaping and output of many beams of light pulses.

[0023] 2. This invention not only solves the requirement of generating multiple pulse signals in the front-end system of a high-power laser device, but also effectively solves the crosstalk problem between pulses, which can effectively improve pulse quality and increase the energy utilization rate of laser pulses.

[0024] 3. The present invention adopts an all-fiber optical path structure, which has the advantages of high stability, high flexibility and low maintenance cost. Attached Figure Description

[0025] Figure 1 This is the overall technical solution of Embodiment 1 of a high signal-to-noise ratio time-division multiplexing-based multi-output high-power laser device front-end system proposed in this invention.

[0026] Figure 2 This is a comparison between the front-end system of a high signal-to-noise ratio multi-output high-power laser device based on time-division multiplexing described in this invention and the final output of the third ultrashort optical pulse in the existing technical implementation scheme;

[0027] Figure 3 This is the normalized output of the electrical pulse waveforms directly output by any signal generator 5 and output after selection by the radio frequency switch 6 in the front-end system of a high signal-to-noise ratio time-division multiplexed multi-output high-power laser device described in this invention.

[0028] Figure 4 This describes a high-contrast optical pulse output in the front-end system of a high signal-to-noise ratio, time-division multiplexed, multi-output high-power laser device according to the present invention.

[0029] Figure 5 It is an existing technology implementation scheme;

[0030] Figure 6 This is the existing technical implementation scheme, which ultimately outputs a sequence of light pulses;

[0031] Figure 7 The existing technical implementation scheme includes a sequence of electrical pulses after the arbitrary signal generator 5, a sequence of electrical pulses after the radio frequency amplifier 7, and a final output sequence of optical pulses.

[0032] In the diagram: 1-Laser seed source; 2-Multi-beam splitter unit; 3-Fiber optic amplifier; 4-Electro-optic modulator; 5-Arbitrary signal generator; 6-1×N RF switch; 7-RF amplifier; 8-Digital delay generator. Detailed Implementation

[0033] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments described herein are only for further description of the present invention and do not imply any limitation on the scope of protection of the present invention.

[0034] Example 1:

[0035] Please refer to Figure 1 , Figure 1 This invention presents a high signal-to-noise ratio (SNR) multi-output high-power laser device front-end system based on time-division multiplexing. As shown in the figure, the system includes a laser seed source 1, a multiplexing unit 2, an fiber amplifier 3, an electro-optic modulator 4, an arbitrary signal generator 5, a 1×4 RF switch 6, an RF amplifier 7, and a digital delay generator 8. The connections between these components are as follows:

[0036] The pulsed laser output from the laser seed source 1 is connected to the multiplexer unit 2 via fiber optic jumpers. Each of the four output terminals of the multiplexer unit 2 is connected to a fiber optic amplifier 3 via a fiber optic jumper. The pulsed laser, amplified by the fiber optic amplifier 3, is connected to the electro-optic modulator 4 via fiber optic jumpers. Additionally, the sequence pulses generated by the arbitrary signal generator 5 are connected to a 1×4 RF switch 6 via RF lines, and the sequence pulses are selected and split into four single pulses. Each of the four output terminals of the RF switch 6 is connected to an RF amplifier 7 via an RF line, and its output electrical signal serves as the modulation signal for the electro-optic modulator 4. The optical pulses shaped by the electro-optic modulator 4 become the final output seed signal. The RF switch 6 can accept external synchronization trigger inputs and uses logic control circuitry to achieve time-division multiplexing of multiple signals for output. The digital delay generator 8 generates one of the trigger signals, which is connected to the synchronous trigger input terminal of the laser seed source 1 via an RF line, one via an RF line to the electrical input terminal of the electro-optic modulator 4, one via an RF line to the trigger signal input terminal of the arbitrary signal generator 5, and one via an RF line to the input terminal of the 1×4 RF switch 6.

[0037] Thus, the front-end system of a high signal-to-noise ratio time-division multiplexing-based multi-output high-power laser device is completed. In this embodiment, four sequential pulses are first generated from the same source by arbitrary signal generator 5: a shaped pulse with a contrast ratio of 5:1 and a pulse width of 8ns, a square wave pulse with a pulse width of 20ns, an ultrashort pulse of 40ps, and a shaped pulse with a contrast ratio of 2:1 and a pulse width of 8ns, with a time interval of 400ns between pulses. The output of the resulting third ultrashort optical pulse is as follows. Figure 2 As shown, the third ultrashort optical pulse output in the prior art implementation considered in the comparative example exhibits a large number of oscillations (Without RF) at its leading edge, which greatly affects the signal-to-noise ratio of the output optical pulse and the precise shaping of the injected laser pulse. In contrast, the third ultrashort optical pulse (With RF) output by the front-end system of a high signal-to-noise ratio time-division multiplexing-based multi-output high-power laser device proposed in this invention has a clean and noise-free leading edge, which can effectively solve the crosstalk problem between pulses.

[0038] In addition, this embodiment also considers the impact of the RF switch 6 itself on the output, in order to better utilize the RF switch for precision pulse shaping. Figure 3 To normalize and compare the electrical pulse waveforms directly output by arbitrary signal generator 5 and output after passing through the RF switch 6 menu, it is evident that the RF switch has good fidelity and does not introduce significant waveform distortion. Furthermore, the calculated loss introduced by the RF switch is around 15%–20%, indicating that the loss introduced by the RF switch 6 can be completely compensated by adjusting the output amplitude of arbitrary signal generator 5.

[0039] In this embodiment, relevant parameters are also detected, specifically signal-to-noise ratio, contrast, rise time, and shortest pulse. The results are as follows:

[0040] (1) For a square wave pulse with a pulse width of 20 ns, the signal-to-noise ratio (SNR) of the detected output square wave optical pulse is 42.12 dB (to appropriately compensate for the loss of RF switch 6, the output amplitude of arbitrary signal generator 5 is adjusted to 307 mV). The SNR is calculated as follows:

[0041]

[0042] In the formula, P s It is the amplitude of the signal, P n It represents the amplitude of the noise, and lg represents the logarithm to the base 10.

[0043] (2) For an 8ns shaping pulse with a contrast ratio of 2:1, the contrast ratio of the detected output light pulse is 7.6:1 (in order to properly compensate for the loss of the RF switch 6, the output amplitude of the arbitrary signal generator 5 is adjusted to 300mV).

[0044] (3) The rising edge of the square wave light pulse output after the selection is measured to be as fast as 55ps using a 45G high-speed phototube (the output amplitude of arbitrary signal generator 5 is 400mV).

[0045] (4) The pulse width of the shortest optical pulse output after the selection was measured to be 67ps using a 45G high-speed phototube (the output amplitude of arbitrary signal generator 5 is 307mV).

[0046] Example 2:

[0047] In this embodiment, a set of 25ns wide pulses is used to detect whether the low-frequency characteristics of the RF switch 6 affect the pulse output. The four pulse sequences output by the arbitrary signal generator 5 are, in order, a shaped pulse with a contrast ratio of 5:1 and a pulse width of 25ns, a 25ns square wave pulse, a 25ns square wave pulse, and a shaped pulse with a contrast ratio of 2:1 and a pulse width of 25ns. First, the optical pulse output of this set of pulse sequences is considered in the prior art implementation scheme considered in the comparative example, specifically involving the detection of signal-to-noise ratio and contrast. The results are as follows:

[0048] (1) For a square wave pulse with a pulse width of 25 ns, the signal-to-noise ratio of the detected output square wave optical pulse is 36.86 dB (the output amplitude of any signal generator 5 is 250 mV).

[0049] (2) For a shaping pulse with a pulse width of 25ns and a contrast ratio of 2:1, the contrast ratio of the detected output light pulse is 9.3:1 (the output amplitude of arbitrary signal generator 5 is 250mV).

[0050] Secondly, the optical pulse output of this sequence of pulses through the front-end system of a high signal-to-noise ratio time-division multiplexing-based multi-output high-power laser device (Example 1) described in this invention was considered, and the results are as follows:

[0051] (1) For a square wave pulse with a pulse width of 25ns, the signal-to-noise ratio of the detected output square wave optical pulse is 42.76dB (the output amplitude of any signal generator 5 is 307mV). Compared with the existing technology implementation scheme, the signal-to-noise ratio is larger, which means that the output optical pulse has stronger anti-interference ability.

[0052] (2) For a shaping pulse with a pulse width of 25ns and a contrast ratio of 2:1, the contrast ratio of the detected output light pulse is 6.6:1 (the output amplitude of any signal generator 5 is 250mV). Compared with the prior art implementation, the contrast ratio is smaller, which means that the stability of the output light pulse is better.

[0053] Example 3:

[0054] This embodiment considers a high-contrast light pulse output scenario. An arbitrary signal generator 5 is used to output a shaped electrical pulse with a contrast ratio of 15:1, output according to the scheme described in Embodiment 1. The final output light pulse has a contrast ratio of 601:1 > 500:1 (the pulse contrast ratio required by the system). Figure 4 This represents the output of high-contrast light pulses. The black curve represents the global output of high-contrast light pulses, while the smaller image represents a detailed view of the pulse leading edge magnified. As can be seen, the pulse leading edge is clean and noise-free.

[0055] Comparative example:

[0056] Please see Figure 5 To better demonstrate the advantages of the high signal-to-noise ratio (SNR) multi-output high-power laser device front-end system based on time-division multiplexing proposed in this invention, this comparative example considers a simplified technical solution for generating many optical pulses based on time-division multiplexing technology commonly used in current domestic high-power laser devices. Figure 5 As can be seen, the existing technical implementation scheme includes a laser seed source 1, an optical fiber amplifier 3, an electro-optic modulator 4, an arbitrary signal generator 5, an RF amplifier 7, and a digital delay generator 8. The connection relationship of the above components is as follows:

[0057] The pulsed laser output from the laser seed source 1 is connected to the fiber amplifier 3 via an optical fiber jumper. The pulsed laser, amplified by the fiber amplifier 3, is then connected to the electro-optic modulator 4 via another optical fiber jumper. The modulation signal of the electro-optic modulator 4 originates from the sequence of electrical pulses generated by the arbitrary signal generator 5 and amplified by the radio frequency amplifier 7. The sequence of optical pulses shaped by the electro-optic modulator 4 becomes the final output seed signal. One of the trigger signals generated by the digital delay generator 8 is connected to the synchronous trigger input terminal of the laser seed source 1 via an radio frequency line, another is connected to the electrical input terminal of the electro-optic modulator 4 via an radio frequency line, and the third is connected to the trigger signal input terminal of the arbitrary signal generator 5 via an radio frequency line.

[0058] In this embodiment, four pulse sequences are first generated from the same source by an arbitrary signal generator 5: a shaped pulse with a contrast ratio of 5:1 and a pulse width of 8ns, a square wave pulse with a pulse width of 20ns, a 40ps ultrashort pulse, and a shaped pulse with a contrast ratio of 2:1 and a pulse width of 8ns. The time interval between the pulses is 400ns. The final output seed signal is measured using a 12G oscilloscope as follows: Figure 6 As shown. Figure 7 Yes Figure 6 The local details are magnified, and the output of the sequence of electrical pulses after arbitrary signal generator 5 and RF amplifier 7 is added. The average sampling mode of the oscilloscope is used to reduce random noise. Figure 4 It can be seen that by generating a series of multiple shaping pulses in the form of sequential pulses, the preceding pulses will affect the following pulses during the time shaping process.

[0059] In this embodiment, relevant parameters are also detected, specifically the signal-to-noise ratio and contrast ratio. The results are as follows:

[0060] (1) For a square wave pulse with a pulse width of 20 ns, the signal-to-noise ratio of the detected output square wave optical pulse is 40.11 dB (the output amplitude of any signal generator 5 is set to 250 mV).

[0061] (2) For a shaping pulse with a pulse width of 8ns and a contrast ratio of 2:1, the contrast ratio of the detected output light pulse is 6.7:1 (the output amplitude of arbitrary signal generator 5 is 250mV).

[0062] The above-described embodiments are merely preferred embodiments of the present invention and are not limited to the present invention; various modifications and variations can be made to the present invention by those skilled in the art.

Claims

1. A high signal-to-noise ratio time-division multiplexing-based multi-output high-power laser device front-end system, comprising a laser seed source (1), an arbitrary signal generator (5), and a digital delay generator (8), characterized in that, It also includes a multi-beam splitter (2), an optical fiber amplifier group consisting of N optical fiber amplifiers (3), an electro-optic modulator group consisting of N electro-optic modulators (4), an radio frequency amplifier group consisting of N radio frequency amplifiers (7), and a 1×N radio frequency switch (6). The pulsed laser output from the laser seed source (1) is connected to the multi-beam splitting unit (2) via fiber optic jumpers. The N output terminals of the multi-beam splitting unit (2) are each connected to N fiber amplifiers (3) via fiber optic jumpers. The pulsed laser amplified by the fiber amplifiers (3) is connected to the electro-optic modulator (4) via fiber optic jumpers. The sequence pulse generated by the arbitrary signal generator (5) is connected to the 1×N RF switch (6) by the RF line, and the sequence pulse is selected and cut into N single pulses. The N output terminals of the 1×N RF switch (6) are each connected to N RF amplifiers (7) by the RF line. The output electrical signal is used as the modulation signal of N electro-optic modulators (4). The optical pulse after being shaped by the electro-optic modulator (4) is the final output seed signal. The digital delay generator (8) generates a trigger signal, one of which is connected to the synchronous trigger input terminal of the laser seed source (1) via an RF line, N signals are connected to the electrical input terminals of N electro-optic modulators (4) via an RF line, one signal is connected to the trigger signal input terminal of an arbitrary signal generator (5) via an RF line, and one signal is connected to the input terminal of a 1×N RF switch (6) via an RF line. The 1×N RF switch (6) accepts synchronous trigger input and realizes time-division output of multiple signals through a logic control circuit.

2. The high signal-to-noise ratio time-division multiplexing-based multi-output high-power laser device front-end system according to claim 1, characterized in that: The laser seed source (1) is a pulsed laser oscillator that outputs directly, or a laser system that combines a continuous laser with an optical switch to generate pulsed laser. The laser source can accept external triggering to synchronously control the output time of the laser pulse.

3. The high signal-to-noise ratio time-division multiplexing-based multi-output high-power laser device front-end system according to claim 1, characterized in that: The aforementioned multi-path beam splitting unit (2) is an optical path beam splitting unit with one input and multiple outputs based on optical fiber or waveguide.

4. The high signal-to-noise ratio time-division multiplexing-based multi-output high-power laser device front-end system according to claim 1, characterized in that: The fiber amplifier (3) is an optical signal amplification system based on gain fiber and pump light source, which is a single-stage amplification or multi-stage cascade.

5. The high signal-to-noise ratio time-division multiplexing-based multi-output high-power laser device front-end system according to claim 1, characterized in that: The electro-optic modulator (4) is a modulation device that uses the electro-optic effect to modulate the characteristics of an electrical signal into the characteristics of an optical signal for output.

6. The high signal-to-noise ratio time-division multiplexing-based multi-output high-power laser device front-end system according to claim 1, characterized in that: The arbitrary signal generator (5) is a programmable arbitrary electrical signal generator.

7. The high signal-to-noise ratio time-division multiplexing-based multi-output high-power laser device front-end system according to claim 1, characterized in that: The 1×N RF switch (6) is an RF device with one input and multiple time-division output functions. It can accept external synchronous trigger input and realize the time-division output of multiple signals through logic control circuit.

8. The high signal-to-noise ratio time-division multiplexing-based multi-output high-power laser device front-end system according to claim 1, characterized in that: The radio frequency amplifier (7) is a radio frequency device with high-speed electrical signal amplification capability, which can amplify the amplitude of the signal distributed by the signal generator through the radio frequency switch to the amplitude required by the electro-optic modulator.

9. The high signal-to-noise ratio time-division multiplexing-based multi-output high-power laser device front-end system according to claim 1, characterized in that: The digital delay generator (8) generates multiple time-dependent, delay-adjustable time trigger signals, which are provided to the laser seed source (1), electro-optic modulator (4), arbitrary signal generator (5), and 1×N RF switch (6) as trigger inputs, so that each module works at a specific time delay.

10. The high signal-to-noise ratio time-division multiplexing-based multi-output high-power laser device front-end system according to claim 1, characterized in that: The laser seed source (1), the multi-beam splitter (2), the fiber amplifier (3), and the electro-optic modulator (4) are connected by fiber optic patch cords and fiber optic flanges.

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