Device for generating pulse sodium beacon lasers of high average-power and high repetition-frequency

Abstract

The invention provides a device for combining a plurality of beams of pulse beacon sub lasers of low average-power and low repetition-frequency to generate pulse sodium beacon lasers of high average-power and high repetition-frequency. The device comprises a pulse sodium beacon laser system, a polarization combination system, an image transmission system and a time sequence combination synchronous control system. The device is characterized in that the pulse sodium beacon laser system can generate a set of time sequence pulse sodium beacon lasers under the control of the time sequence combination synchronous control system; the beams of pulse sodium beacon lasers of low average-power and low repetition-frequency are combined into a beam of pulse sodium beacon lasers of high average-power and high repetition-frequency through a polarization time sequence combination technology, and meanwhile the wave length and the line width of each beam of pulse sodium beacon sub lasers are enabled to be consistent through utilization of a seed injection technology. Compared with the effect before combination, according to the sodium beacon lasers, the polarization degree of single route of laser is not changed, the beam directivity is not changed, the beam quality is not changed, the wavelength is not changed and the line width is not changed, and performance of the sodium beacon lasers is effectively improved.

Description

technical field

[0001] The invention belongs to the field of solid-state lasers, in particular to a device for generating pulsed sodium beacon lasers with high average power and high repetition frequency. technical background

[0002] When large-scale ground-based telescopes observe space objects such as celestial bodies, the imaging resolution will be greatly reduced due to disturbances such as atmospheric turbulence. Adaptive optics technology can be used to correct these disturbance factors, so that the telescope can achieve theoretical diffraction-limited resolution, which is especially necessary for large-aperture astronomical telescopes with extremely high theoretical diffraction-limited resolution. When the adaptive optics system is used for image correction, a guide star (called a beacon) is needed, that is, a strong light source is generated or searched for at a certain height from the ground, and the wavefront of the optical signal emitted by it is used as a standa...

Examples

Embodiment 1

[0031] The specific structure of this embodiment refers to figure 2 a, figure 2 b is a pulse signal diagram; in this embodiment, a device based on two synthetic pulsed sodium beacon lasers of 1064nm and 1319nm fundamental frequency light sum frequencies is produced.

[0032] This embodiment includes a timing synthesis synchronous control system 1, a pulsed sodium beacon laser system 2, a polarization synthesis system 3 and an image transmission system 4;

[0033] Timing synthesis synchronous control system 1 is composed of a signal source and a power supply;

[0034] The pulsed sodium beacon laser system is composed of two pulsed sodium beacon sub-lasers; each pulsed sodium beacon sub-laser consists of a high-power narrow linewidth 1064nm fundamental frequency optical seed source 2-01, a high-power narrow linewidth 1319nm Fundamental frequency light seed source 2-02, high power narrow linewidth 1064nm laser amplifier 2-11, high power narrow linewidth 1319nm laser amplifier...

Embodiment 2

[0044] The specific structure of this embodiment refers to image 3 ; In this embodiment, a device for generating high average power and high repetition rate pulsed sodium beacon laser based on the synthesis of three beams of pulsed lasers based on the sum frequency of 1064nm and 1319nm fundamental frequencies.

[0045] This embodiment is similar to Embodiment 1, except that the device contains three pulsed sodium beacon sub-lasers, and the specific implementation method is:

[0046] The first high-power narrow linewidth 1064nm fundamental frequency optical seed source 2-01, the first high power narrow linewidth 1319nm fundamental frequency optical seed source 2-02, high power narrow linewidth 1064nm laser amplifier 2-111, high power Narrow linewidth 1319nm laser amplifier 2-121, the first 1064nm fundamental frequency optical image transmission system 4-1, the first 1319nm fundamental frequency optical image transmission system 4-2, the first folding mirror 2-21, the first Fo...

Embodiment 3

[0054] The specific structure of this embodiment refers to Figure 4 , a is the structure diagram of the device, and b is the pulse signal diagram; in this embodiment, a device of high average power and high repetition rate pulsed sodium beacon laser synthesized by four sub-pulse lasers is produced.

[0055] This embodiment is similar to Embodiment 2, and the differences mainly include:

[0056] Four groups of time-sequence pulse sodium beacon laser systems are used to generate four-way time-sequence pulse sodium beacon laser signals; any two of the four-way time-sequence pulse sodium beacon laser signals are synthesized to generate two synthetic time-sequence pulse sodium beacon laser signals ; The two synthesizing timing pulsed sodium beacon laser signals are synthesized again to obtain one synthesizing sodium beacon laser.

[0057] Adopt unified seed source injection mode: one high-power narrow-linewidth 1064nm fundamental frequency optical seed source 2-01, four high-powe...

technical field

[0001] The invention belongs to the field of solid-state lasers, in particular to a device for generating pulsed sodium beacon lasers with high average power and high repetition frequency. technical background

[0002] When large-scale ground-based telescopes observe space objects such as celestial bodies, the imaging resolution will be greatly reduced due to disturbances such as atmospheric turbulence. Adaptive optics technology can be used to correct these disturbance factors, so that the telescope can achieve theoretical diffraction-limited resolution, which is especially necessary for large-aperture astronomical telescopes with extremely high theoretical diffraction-limited resolution. When the adaptive optics system is used for image correction, a guide star (called a beacon) is needed, that is, a strong light source is generated or searched for at a certain height from the ground, and the wavefront of the optical signal emitted by it is used as a standa...

Examples

Embodiment 1

[0031] The specific structure of this embodiment refers to figure 2 a, figure 2 b is a pulse signal diagram; in this embodiment, a device based on two synthetic pulsed sodium beacon lasers of 1064nm and 1319nm fundamental frequency light sum frequencies is produced.

[0032] This embodiment includes a timing synthesis synchronous control system 1, a pulsed sodium beacon laser system 2, a polarization synthesis system 3 and an image transmission system 4;

[0033] Timing synthesis synchronous control system 1 is composed of a signal source and a power supply;

[0034] The pulsed sodium beacon laser system is composed of two pulsed sodium beacon sub-lasers; each pulsed sodium beacon sub-laser consists of a high-power narrow linewidth 1064nm fundamental frequency optical seed source 2-01, a high-power narrow linewidth 1319nm Fundamental frequency light seed source 2-02, high power narrow linewidth 1064nm laser amplifier 2-11, high power narrow linewidth 1319nm laser amplifier...

Embodiment 2

[0044] The specific structure of this embodiment refers to image 3 ; In this embodiment, a device for generating high average power and high repetition rate pulsed sodium beacon laser based on the synthesis of three beams of pulsed lasers based on the sum frequency of 1064nm and 1319nm fundamental frequencies.

[0045] This embodiment is similar to Embodiment 1, except that the device contains three pulsed sodium beacon sub-lasers, and the specific implementation method is:

[0046] The first high-power narrow linewidth 1064nm fundamental frequency optical seed source 2-01, the first high power narrow linewidth 1319nm fundamental frequency optical seed source 2-02, high power narrow linewidth 1064nm laser amplifier 2-111, high power Narrow linewidth 1319nm laser amplifier 2-121, the first 1064nm fundamental frequency optical image transmission system 4-1, the first 1319nm fundamental frequency optical image transmission system 4-2, the first folding mirror 2-21, the first Fo...

Embodiment 3

[0054] The specific structure of this embodiment refers to Figure 4 , a is the structure diagram of the device, and b is the pulse signal diagram; in this embodiment, a device of high average power and high repetition rate pulsed sodium beacon laser synthesized by four sub-pulse lasers is produced.

[0055] This embodiment is similar to Embodiment 2, and the differences mainly include:

[0056] Four groups of time-sequence pulse sodium beacon laser systems are used to generate four-way time-sequence pulse sodium beacon laser signals; any two of the four-way time-sequence pulse sodium beacon laser signals are synthesized to generate two synthetic time-sequence pulse sodium beacon laser signals ; The two synthesizing timing pulsed sodium beacon laser signals are synthesized again to obtain one synthesizing sodium beacon laser.

[0057] Adopt unified seed source injection mode: one high-power narrow-linewidth 1064nm fundamental frequency optical seed source 2-01, four high-powe...

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