CN114520459A - Device and method for switching and outputting continuous orthogonal polarization laser - Google Patents
Device and method for switching and outputting continuous orthogonal polarization laser Download PDFInfo
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- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
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- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/08—Construction or shape of optical resonators or components thereof
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
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Abstract
The invention discloses a device and a method for switching and outputting continuous orthogonal polarization laser, comprising the following steps: a 1.9 mu m horizontal line polarization continuous light laser, a resonant cavity input cavity mirror, a Brewster mirror, a Ho, an LLF laser crystal, a 2 mu m laser output coupling mirror, a 2 mu m semi-transmission semi-reflection mirror, an automatic closing switch, a first total reflection mirror, a light delayer, an optical attenuator, a second total reflection mirror, a half-wave plate and a signal synchronous controller; the optical delay circuit can realize 2-micron horizontal single-polarization light output, can also realize vertical-polarization continuous light output by properly adjusting the optical delay device and the optical attenuator, and can switch orthogonal-polarization continuous light output in real time by adjusting the circuit control system. The invention has the advantages of high switching efficiency, controllable polarization state, simple optical path structure, few used devices, low cost and the like, can realize the accurate control of the output time of two orthogonal beams of polarized light through a highly integrated circuit control system, and can self-select the output time of the polarized light.
Description
Technical Field
The invention belongs to the technical field of laser, and relates to a device and a method for switching and outputting continuous orthogonal polarization laser, in particular to a device and a method for switching and outputting continuous orthogonal polarization laser by a self-injection annular cavity.
Background
The laser with the wavelength of 2 mu m in the atmospheric transmission window can be applied to laser radar, wherein the laser used as a light source of the differential absorption radar can output two lasers with different polarization states, and the orthogonal polarization solid laser technology can meet the condition. Solid-state lasers have been extensively studied for orthogonal polarization technology, but there are many drawbacks to each orthogonal polarization solution. At present, most of solid-state lasers adopt polarizing devices such as a polarizing plate or a double-brewster mirror to realize polarization output, but only can realize single polarization state output, double polarization output is difficult to realize, the extinction ratio of output polarized light is low, and ideal effects are difficult to achieve. Although the switching of two beams of vertical-horizontal polarized light can be realized by adopting the half-wave plate at present, the phase instability is greatly aggravated and the polarization characteristic of the laser is greatly reduced due to the time delay in the switching process. The change of the polarization state of the light beam can be realized by applying a transverse half-wave voltage on a special electro-optical crystal (such as a doped magnesium oxide lithium niobate crystal), but the electro-optical crystal needs to have a very high damage-resistant threshold, and the crystal voltage cannot be too high to avoid damaging the crystal.
Patent No. CN201920037577.8, "a MgO-based: in the LN crystal electro-optical cavity emptying all-solid-state pulse laser, only single polarization output is realized and a polarizer is added, orthogonal polarization alternate output cannot be realized, the light-light conversion efficiency is low, and MgO is required: the LN crystal is required to have good damage resistance. In the "method for controlling and stabilizing a laser polarization state control and stabilization device" of patent No. cn201611253656.x, devices such as a polarization controller, a polarizer and a beam splitter are adopted, which increases the cost, adds the loss of the device to the optical power, and increases the complexity of the optical path. Patent No. CN201611087525.9Laser "use of bonded crystals is expensive and the crystals have severe thermal effects. Currently, special laser crystals such as Yb: GdAl are used3(BO3)4[Dual-polarization and dual-wavelength diode-pumped laser operation from a birefringent Yb3+-doped GdAl3(BO3)4nonlinear crystal]、Yb:YCa4O(BO3)3[Output-coupling-dependent polarization state of a continuous-wave Yb:YCa4O(BO3)3laser]The orthogonal polarization output is realized by adjusting the position of the output mirror or the transmittance of the output mirror, but the use value is limited by factors such as complex structure, low output power efficiency and the like.
Research on self-injection feedback has been carried out in China, polarization mode switching is realized under certain feedback intensity and detuning frequency conditions through VCSEL nonlinear characteristics [ dynamic characteristics of light injection VCSELs under photoelectric feedback ] under the light feedback action of orthogonal polarization injection, and a fiber laser can realize stable control in a laser Chaotic system through specific periodic modulation and light feedback in different modes [ Chaotic behavor in erbium-doped fiber-ring lasers ]. However, most of the non-linear researches are focused on semiconductor lasers and fiber lasers, and the researches on self-injection delay feedback of solid lasers are less. Patent No. CN111446608A also adopts fiber-type self-injection instead of self-injection of solid-state laser, and the use of fiber laser to obtain 2 μm laser requires higher requirements for fiber material.
The Hol-LLF crystal has obvious anisotropy, is a natural birefringence crystal, can be used as a laser crystal in a solid laser, and can realize output light in two different polarization states by certain technical means. Meanwhile, the absorption peak of Ho: LLF is concentrated in the 1.9 mu m wave band, and the Tm is doped3+The output wavelength of the laser is 1.9 μm wave band, which is very beneficial to realizing high-efficiency in-band pumping, and finally the laser can output 2 μm wavelength laser.
Disclosure of Invention
In view of the foregoing prior art, the technical problem to be solved by the present invention is to provide an apparatus and a method for realizing switching output of continuous orthogonal polarization laser from an injection ring cavity.
To solve the above technical problem, the present invention provides a device for switching and outputting continuous orthogonal polarization laser, including: a 1.9 mu m horizontal line polarization continuous light laser, a resonant cavity input cavity mirror, a Brewster mirror, a Ho, an LLF laser crystal, a 2 mu m laser output coupling mirror, a 2 mu m semi-transmission semi-reflection mirror, an automatic closing switch, a first total reflection mirror, a light delayer, an optical attenuator, a second total reflection mirror, a half-wave plate and a signal synchronous controller; when the signal synchronous controller controls the automatic on-off switch to be switched off, 1.9 mu m horizontal linear polarized light generated by the 1.9 mu m horizontal linear polarized continuous light laser sequentially passes through the resonant cavity input cavity mirror and the Brewster mirror, and the pumping power of the laser is controlled to enable the 1.9 mu m horizontal linear polarized light to pass through the Ho, namely, the LLF laser crystal generates 2 mu m horizontal linear polarized light, and after the 2 mu m horizontal linear polarized light passes through the 2 mu m laser output coupling mirror, part of the 2 mu m horizontal linear polarized light passes through the 2 mu m semi-transmission semi-reflection mirror and is output; when the signal synchronous controller controls the automatic closing switch to be closed, 2 mu m horizontal line polarized light reflected by the 2 mu m semi-transmission semi-reflection mirror is reflected by the first total reflector and then passes through the light delayer to adjust the time delay of a light path, the light power is adjusted by the optical attenuator, 2 mu m horizontal polarized light reflected by the second total reflector is changed into 2 mu m vertical polarized light by the half-wave plate, and the 2 mu m vertical linear polarized light is sequentially output by the 2 mu m semi-transmission semi-reflection mirror after passing through the Brewster mirror, the Ho, the LLF laser crystal and the 2 mu m laser output coupling mirror.
The invention also includes a device for switching and outputting continuous orthogonal polarization laser, comprising: a 2-micron laser source, a Brewster mirror, a 2-micron laser output coupling mirror, a 2-micron semi-transmission semi-reflection mirror, an automatic closing switch, a first total reflection mirror, an optical delayer, an optical attenuator, a second total reflection mirror, a half-wave plate and a signal synchronous controller, wherein the laser source is composed of a 1.9-micron horizontal line polarization continuous light laser and Ho, and the laser output coupling mirror is composed of LLF laser crystals; when the signal synchronous controller controls the automatic on-off switch to be switched off, 2-micron horizontal linear polarized light generated by the 2-micron laser source passes through the 2-micron laser output coupling mirror, and partial 2-micron horizontal linear polarized light passes through the 2-micron semi-transmission semi-reflection mirror and is output; when the signal synchronous controller controls the automatic closing switch to be closed, 2 mu m horizontal line polarized light reflected by the 2 mu m semi-transmission semi-reflection mirror passes through the first total reflector and then passes through the light delayer to adjust the time delay of a light path, the light power is adjusted by the light attenuator, 2 mu m horizontal polarized light reflected by the second total reflector passes through the half-wave plate to become 2 mu m vertical polarized light, and the 2 mu m vertical polarized light passes through the Brewster mirror, the Ho, the LLF laser crystal and the 2 mu m laser output coupling mirror in sequence and then is output by the 2 mu m semi-transmission semi-reflection mirror.
The invention also comprises a device for switching and outputting the continuous orthogonal polarization laser, which comprises a 808nm semiconductor laser, a resonant cavity input cavity mirror, a Brewster mirror, Nd, a YAG laser crystal, a polarization switch, a 1064nm laser output coupling mirror, a 1064nm semi-transmission semi-reflection mirror, an automatic closing switch, a first total reflection mirror, an optical delayer, an optical attenuator, a second total reflection mirror, a half-wave plate, a signal synchronous controller and a polarization switch; when the signal synchronous controller controls the automatic closing switch to be switched off, 808nm laser generated by the 808nm semiconductor laser sequentially passes through the resonant cavity input cavity mirror and the Brewster mirror, the 808nm laser passes through the Nd, namely, the YAG laser crystal to generate 1064nm unpolarized light, the 1064nm unpolarized light passes through the polarization switching switch in the horizontal polarization state to obtain 1064nm horizontal linearly polarized light, and after the 1064nm horizontal linearly polarized light passes through the 1064nm laser output coupling mirror, part of the 1064nm horizontal linearly polarized light passes through the 1064nm semi-transmission semi-reflection mirror and is output; when the signal synchronous controller controls the automatic closing switch to be closed, 1064nm horizontal line polarized light reflected by the 1064nm semi-transmission semi-reflection mirror is reflected by the first total reflector and then passes through the light delayer to adjust the time delay of a light path, the light power is adjusted by the light attenuator, the 1064nm horizontal polarized light reflected by the second total reflector is changed into 1064nm vertical polarized light by the half-wave plate, the 1064nm vertical linear polarized light sequentially passes through the Brewster mirror, the Nd: YAG laser crystal and the polarization switch in the vertical polarization state, and the 1064nm laser passes through the 1064nm output coupling mirror and then is output by the 1064nm semi-transmission semi-reflection mirror.
The invention also comprises a method for switching and outputting the continuous orthogonal polarization laser by adopting the first device, when the signal synchronous controller controls the automatic on-off switch to be switched off, 1.9 mu m horizontal linear polarization generated by the 1.9 mu m horizontal linear polarization continuous light laser passes through the resonant cavity input cavity mirror and the Brewster mirror in sequence, and the pumping power of the laser is controlled to enable the 1.9 mu m horizontal linear polarization to pass through Ho, wherein LLF laser crystal generates 2 mu m horizontal linear polarization, and after the 2 mu m horizontal linear polarization passes through the 2 mu m laser output coupling mirror, part of the 2 mu m horizontal linear polarization passes through the 2 mu m semi-transmission semi-reflection mirror and is output; when the signal synchronous controller controls the automatic closing switch to be closed, 2 mu m horizontal line polarized light reflected by the 2 mu m semi-transmission semi-reflection mirror is reflected by the first total reflector and then passes through the light delayer to adjust the time delay of a light path, the light power is adjusted by the optical attenuator, 2 mu m horizontal polarized light reflected by the second total reflector is changed into 2 mu m vertical polarized light by the half-wave plate, and the 2 mu m vertical linear polarized light is sequentially output by the 2 mu m semi-transmission semi-reflection mirror after passing through the Brewster mirror, the Ho, the LLF laser crystal and the 2 mu m laser output coupling mirror.
The invention also comprises a method for switching output of continuous orthogonal polarization laser by adopting a second device, wherein a control signal synchronous controller is used for switching off an automatic on-off switch, 2 mu m horizontal linear polarization light generated by a 2 mu m laser source passes through a 2 mu m laser output coupling mirror, and part of the 2 mu m horizontal linear polarization light passes through a 2 mu m semi-transmission semi-reflection mirror and is output; the control signal synchronous controller closes the automatic closing switch, 2 mu m horizontal line polarized light reflected by the 2 mu m semi-transmission semi-reflection mirror is reflected by the first total reflection mirror and then passes through the light delayer to adjust the time delay of a light path, the light power is adjusted by the optical attenuator, 2 mu m horizontal polarized light reflected by the second total reflection mirror is changed into 2 mu m vertical polarized light by the half-wave plate, and the 2 mu m vertical linear polarized light is output by the 2 mu m semi-transmission semi-reflection mirror after sequentially passing through the Brewster mirror, the Ho, the LLF laser crystal and the 2 mu m laser output coupling mirror.
The invention also comprises a method for switching output of continuous orthogonal polarization laser by adopting a third device, when a signal synchronous controller controls an automatic closing switch to be switched off, 808nm laser generated by a 808nm semiconductor laser passes through a resonant cavity input cavity mirror and a Brewster mirror in sequence, the 808nm laser passes through Nd, namely a YAG laser crystal to generate 1064nm unpolarized light, 1064nm unpolarized light passes through a polarization switching switch in a horizontal polarization state to obtain 1064nm horizontal linear polarization, and after the 1064nm horizontal linear polarization passes through a 1064nm laser output coupling mirror, part of 1064nm horizontal linear polarization passes through a 1064nm semi-reflecting mirror and is output; when the signal synchronous controller controls the automatic closing switch to be closed, 1064nm horizontal line polarized light reflected by the 1064nm semi-transmission semi-reflection mirror is reflected by the first total reflector and then passes through the light delayer to adjust the time delay of a light path, the light power is adjusted by the light attenuator, the 1064nm horizontal polarized light reflected by the second total reflector is changed into 1064nm vertical polarized light by the half-wave plate, the 1064nm vertical linear polarized light sequentially passes through the Brewster mirror, the Nd: YAG laser crystal and the polarization switch in the vertical polarization state, and the 1064nm laser passes through the 1064nm output coupling mirror and then is output by the 1064nm semi-transmission semi-reflection mirror.
The invention has the beneficial effects that: the invention adopts a linear laser resonant cavity and a ring-shaped self-injection light path, realizes the output of orthogonal polarization continuous laser by adjusting an automatic closing switch, a light delayer and a light attenuator on the self-injection light path, and the self-injection ring-shaped laser not only can realize the output of 2 mu m horizontal single polarization light, but also can realize the output of vertical polarization continuous light by properly adjusting the light delayer and the light attenuator, and can switch the output of orthogonal polarization continuous light in real time by adjusting a circuit control system. The orthogonal polarization switching continuous light output is realized based on self-injection, and the method has the advantages of high switching efficiency, controllable polarization state, simple light path structure, few used devices, low cost and the like. Through a highly integrated circuit control system, the output time of two orthogonal beams of polarized light can be accurately controlled, and the output time of the polarized light can be selected.
Drawings
FIG. 1 is a light path diagram of embodiment 1 of the present invention;
FIG. 2 is a circuit control system according to embodiment 1 of the present invention;
FIG. 3 is a flowchart of a circuit control system according to embodiment 1 of the present invention;
FIG. 4 is a side-pumping optical path diagram according to embodiment 2 of the present invention;
fig. 5 is a light path diagram of embodiment 3 of the present invention.
Detailed Description
The invention is further described with reference to the drawings and the specific embodiments in the following description.
Example 1:
with reference to fig. 1 and 2, 1 is a 1.9 μm horizontal linear polarization continuous light laser; 2 is a resonant cavity input cavity mirror (1.9 μm wave band antireflection, 2 μm wave band total reflection); 3 is Brewster's mirror; 4 is Ho, LLF laser crystal; 5 is a 2-micron laser output coupling mirror; 6 is a 2-micron semi-transmission and semi-reflection mirror; 7 is an automatic closing switch; 8 is a first total reflection mirror; 9 is a light delayer; 10 is an optical attenuator; 11 is a second holophote; 12 is a half-wave plate; 13 is a signal synchronous controller;
the laser mainly comprises a linear output cavity and a self-injection annular light path.
Linear laser cavity: the linear laser cavity sequentially comprises a 1.9 mu m horizontal line polarization continuous light laser 1, a resonant cavity input cavity mirror 2, a Brewster mirror 3, a Ho, an LLF laser crystal 4 and a 2 mu m laser output coupling mirror 5;
annular self-injection optical path: the self-injection annular light path sequentially comprises a 2-micron semi-transmission semi-reflection mirror 6, an automatic closing switch 7, a first total reflection mirror 8, a light delayer 9, an optical attenuator 10, a second total reflection mirror 11, a half-wave plate 12, a Brewster mirror 3, a Ho, an LLF laser crystal 4 and a 2-micron laser output coupling mirror 5;
linear laser cavity: a horizontal linear polarized continuous light laser 1 with the size of 1.9 mu m generates horizontal linear polarized light with the size of 1.9 mu m, the horizontal linear polarized light firstly passes through a resonant cavity input cavity mirror 2, wherein the resonant cavity input cavity mirror 2 is plated with an antireflection film with the size of 1.9 mu m, and the horizontal linear polarized light with the size of 1.9 mu m passes through a Brewster 3. By controlling the pumping power of the laser, the horizontal linear polarized light of 1.9 μm is enabled to pass through the Ho: LLF laser crystal 4 to generate the horizontal linear polarized light of 2 μm. The 2 μm horizontal linear polarized light is output from the 2 μm laser output coupling mirror 5, and then the partially linear polarized laser light is linearly output through the 2 μm semi-transmission semi-reflection mirror 6. (Linear cavity single optical path oscillation 2-3-4-5)
Self-injection annular optical path: after the laser has stabilized output, the auto-close switch is closed 7. The 2 μm horizontally linearly polarized light after passing through the 2 μm semi-transmissive half-reflective mirror 6 is reflected by the first total reflection mirror 8 to the light delayer 9. The 2 μm horizontal linear polarized light passes through the optical delayer 9 to adjust the optical path time delay and the optical power of the optical attenuator 10 to be reflected to the second total reflector 11. The 2 μm horizontally polarized light reflected by 11 is changed into 2 μm vertically polarized light by the half-wave plate 12. The vertical polarized light with the diameter of 2 mu m is reflected to a Ho-LLF laser crystal 4 through a Brewster mirror 3, and finally, a self-injection light loop is completed through a light output mirror 5. (self-injection annular optical circuit 6-7-8-9-10-11-12-3-4-5).
Circuit control system of orthogonal polarization continuous light output:
the circuit control system comprises: the signal synchronous controller 13 respectively controls the automatic closing switch 7, the optical delayer 9 and the optical attenuator 10, wherein the automatic closing switch 7 mainly realizes the opening or closing of the self-injection loop; the optical delayer 9 is used for adjusting the delay time of the transmission of the polarization mode in the cavity; the optical attenuator 10 adjusts the ratio of the polarization mode feedback intensity to the output intensity. The output of the orthogonal polarization continuous light can be realized by a precise control circuit control system.
Referring to fig. 3, when the circuit control system controls the automatic closing switch 7 to be turned off, the 2 μm horizontally polarized light cannot pass through the self-injection loop, but oscillates in the linear resonant cavity, and continuous light in a 2 μm horizontally polarized state is output; when the circuit control system 7 controls the automatic closing switch to be closed, the horizontal polarized light enters the annular cavity through the self-injection loop, after the optical delayer 9 and the optical attenuator 10 are adjusted, the horizontal polarized light is changed into vertical polarized light by the half-wave plate 12, the vertical polarized light enters the linear cavity through the Brewster lens 3, and the horizontal polarized light is inhibited due to mode competition of the vertical polarized light, so that 2 mu m continuous light in a vertical polarized state can be output.
The circuit control system controls the automatic closing switch to be opened and the optical delayer to adjust the feedback of the injection optical path (for example: the time delay is 2.3 mus): when the optical attenuator feedback coefficient is high (e.g. k)a0.5), the vertical polarized light generated by the self-injection annular light path can start to vibrate in the linear cavity, so that the aim of inhibiting the horizontal polarized light is fulfilled; when the feedback coefficient of the optical attenuator is low (e.g. k)a0.001), the horizontal polarization cannot be suppressed by the vertically polarized lightWhen the light is oscillated, the light output from the laser output mirror is still horizontally polarized.
Example 2:
the structure of embodiment 2 is different from that of embodiment 1 in that the end-pumped mode is adopted in embodiment 1, and the side-pumped mode is also suitable in embodiment 2. The device 2 in fig. 1 is removed, a 2 μm waveband total reflection film is plated on the device 3, and a side pumping mode optical path diagram thereof is shown in fig. 4, and includes: a 2-micron laser source consisting of a 1.9-micron horizontal line polarization continuous light laser 1 and a Ho-a 2-micron laser source consisting of an LLF laser crystal 4, a Brewster mirror 3 (coating film: 2-micron wave band total reflection), a 2-micron laser output coupling mirror 5, a 2-micron semi-transmission semi-reflection mirror 6, an automatic closing switch 7, a first total reflection mirror 8, a light delayer 9, an optical attenuator 10, a second total reflection mirror 11, a half-wave plate 12 and a signal synchronization controller 13; when the signal synchronous controller 13 controls the automatic closing switch 7 to be switched off, 2-micron horizontal linear polarized light generated by the 2-micron laser source passes through the 2-micron laser output coupling mirror 5, and part of the 2-micron horizontal linear polarized light passes through the 2-micron semi-transmission semi-reflection mirror 6 to be output; when the signal synchronous controller 13 controls the automatic closing switch 7 to close, 2 mu m horizontal line polarized light reflected by the 2 mu m semi-transmission semi-reflection mirror 6 is reflected by the first total reflection mirror 8 and then passes through the light delayer 9 to adjust the time delay of the light path, the light power is adjusted by the light attenuator 10, 2 mu m horizontal polarized light reflected by the second total reflection mirror 11 is changed into 2 mu m vertical polarized light by the half-wave plate 12, and the 2 mu m vertical polarized light is output by the 2 mu m semi-transmission semi-reflection mirror 6 after sequentially passing through the Brewster mirror 3, the Ho, the LLF laser crystal 4 and the 2 mu m laser output coupling mirror 5.
Example 3:
the invention can not only realize the light with the wave band of 2 μm, but also be applicable to other wave bands, for example, 1064nm orthogonal polarization switching output continuous laser can also be realized, as shown in figure 5. Wherein 1 is a 808nm semiconductor laser; 2, a resonant cavity input cavity mirror (808nm wave band antireflection and 1064nm wave band total reflection); 3 is Brewster's mirror; YAG laser crystal as Nd; 5 is a 1064nm laser output coupling mirror; 6 is a 1064nm semi-transmission half-reflecting mirror; 7 is an automatic closing switch; 8 is a first total reflection mirror; 9 is a light delayer; 10 is an optical attenuator; 11 is a second holophote; 12 is a half-wave plate; 13 is a signal synchronous controller; and 14 is a polarization switch.
The device 14 is a polarization switch, when the automatic on-off switch 7 is in an off state, the polarization switch 14 is in a horizontal polarization state, and light passing through the polarization switch 14 changes into the horizontal polarization state; when the automatic closing switch 7 is in a closed state, the polarization switch 14 is in a vertical polarization state, and light passing through the polarization switch 14 is in the vertical polarization state; and the polarization switch of the self-injection loop is switched from the vertical polarization state to the horizontal polarization state every time the polarization switch of the self-injection loop is completed; when the signal synchronous controller controls the automatic closing switch 7 to be switched off, 808nm laser light generated by the 808nm semiconductor laser 1 sequentially passes through the resonant cavity input cavity mirror 2 and the Brewster mirror 3, and the 808nm laser light passes through the Nd, namely, the YAG laser crystal 4 to generate 1064nm unpolarized light, the 1064nm unpolarized light passes through the polarization switch 14 in a horizontal polarization state to obtain 1064nm horizontal linearly polarized light, and after the 1064nm horizontal linearly polarized light passes through the 1064nm laser output coupling mirror 5, part of the 1064nm horizontal linearly polarized light passes through the 1064nm semi-transmission semi-reflection mirror 6 and is output; when the signal synchronous controller controls the automatic closing switch 7 to be closed, 1064nm horizontal line polarized light reflected by the 1064nm semi-transmission semi-reflection mirror 6 is reflected by the first total reflector, then passes through the light delayer to adjust 9 the light path time delay, passes through the light attenuator to adjust 10 the light power, passes through the half-wave plate 12 to change the 1064nm horizontal polarized light reflected by the second total reflector 11 into 1064nm vertical polarized light, the 1064nm vertical linear polarized light passes through the Brewster mirror 3, the Nd: YAG laser crystal 4 and the polarization switch 14 in the vertical polarization state in sequence, and the 1064nm laser passes through the 1064nm output coupling mirror 5 and then is output by the 1064nm semi-reflection mirror 6 to be vertically polarized 1064nm laser.
Claims (6)
1. An apparatus for switching output of continuous orthogonal polarization laser, characterized in that: the method comprises the following steps: a 1.9 mu m horizontal line polarization continuous light laser, a resonant cavity input cavity mirror, a Brewster mirror, a Ho, an LLF laser crystal, a 2 mu m laser output coupling mirror, a 2 mu m semi-transmission semi-reflection mirror, an automatic closing switch, a first total reflection mirror, a light delayer, an optical attenuator, a second total reflection mirror, a half-wave plate and a signal synchronous controller; when the signal synchronous controller controls the automatic closing switch to be switched off, 1.9 mu m horizontal linear polarized light generated by the 1.9 mu m horizontal linear polarized continuous light laser sequentially passes through the resonant cavity input cavity mirror and the Brewster mirror, and the pumping power of the laser is controlled to enable the 1.9 mu m horizontal linear polarized light to pass through the Hol, LLF laser crystal to generate 2 mu m horizontal linear polarized light, and after the 2 mu m horizontal linear polarized light passes through the 2 mu m laser output coupling mirror, part of the 2 mu m horizontal linear polarized light passes through the 2 mu m semi-transmission semi-reflection mirror and is output; when the signal synchronous controller controls the automatic closing switch to be closed, 2 mu m horizontal line polarized light reflected by the 2 mu m semi-transmission semi-reflection mirror is reflected by the first total reflector and then passes through the light delayer to adjust the time delay of a light path, the light power is adjusted by the optical attenuator, 2 mu m horizontal polarized light reflected by the second total reflector is changed into 2 mu m vertical polarized light by the half-wave plate, and the 2 mu m vertical linear polarized light is sequentially output by the 2 mu m semi-transmission semi-reflection mirror after passing through the Brewster mirror, the Ho, the LLF laser crystal and the 2 mu m laser output coupling mirror.
2. An apparatus for switching output of continuous orthogonal polarization laser, characterized in that: the method comprises the following steps: a 2-micron laser source, a Brewster mirror, a 2-micron laser output coupling mirror, a 2-micron semi-transmission semi-reflection mirror, an automatic closing switch, a first total reflection mirror, a light delayer, a light attenuator, a second total reflection mirror, a half-wave plate and a signal synchronous controller, wherein the 2-micron laser source, the Brewster mirror, the 2-micron laser output coupling mirror, the 2-micron semi-transmission semi-reflection mirror, the automatic closing switch, the first total reflection mirror, the light delayer, the light attenuator, the second total reflection mirror, the half-wave plate and the signal synchronous controller are formed by LLF laser crystals; when the signal synchronous controller controls the automatic closing switch to be switched off, 2-micron horizontal linear polarized light generated by the 2-micron laser source passes through the 2-micron laser output coupling mirror, and part of the 2-micron horizontal linear polarized light passes through the 2-micron semi-transmission semi-reflection mirror and is output; when the signal synchronous controller controls the automatic closing switch to be closed, 2 mu m horizontal line polarized light reflected by the 2 mu m semi-transmission semi-reflection mirror is reflected by the first total reflector and then passes through the light delayer to adjust the time delay of a light path, the light power is adjusted by the optical attenuator, 2 mu m horizontal polarized light reflected by the second total reflector is changed into 2 mu m vertical polarized light by the half-wave plate, and the 2 mu m vertical linear polarized light is sequentially output by the 2 mu m semi-transmission semi-reflection mirror after passing through the Brewster mirror, the Ho, the LLF laser crystal and the 2 mu m laser output coupling mirror.
3. An apparatus for switching output of continuous orthogonal polarization laser, characterized in that: the laser comprises a 808nm semiconductor laser, a resonant cavity input cavity mirror, a Brewster mirror, Nd, a YAG laser crystal, a polarization switch, a 1064nm laser output coupling mirror, a 1064nm semi-transmission semi-reflection mirror, an automatic closing switch, a first total reflection mirror, an optical delayer, an optical attenuator, a second total reflection mirror, a half-wave plate, a signal synchronous controller and a polarization switch; when the signal synchronous controller controls the automatic closing switch to be switched off, 808nm laser generated by the 808nm semiconductor laser sequentially passes through the resonant cavity input cavity mirror and the Brewster mirror, the 808nm laser passes through the Nd, namely, the YAG laser crystal to generate 1064nm unpolarized light, the 1064nm unpolarized light passes through the polarization switching switch in the horizontal polarization state to obtain 1064nm horizontal linearly polarized light, and after the 1064nm horizontal linearly polarized light passes through the 1064nm laser output coupling mirror, part of the 1064nm horizontal linearly polarized light passes through the 1064nm semi-transmission semi-reflection mirror and is output; when the signal synchronous controller controls the automatic closing switch to be closed, 1064nm horizontal line polarized light reflected by the 1064nm semi-transmission semi-reflection mirror is reflected by the first total reflector and then passes through the light delayer to adjust the time delay of a light path, the light power is adjusted by the light attenuator, the 1064nm horizontal polarized light reflected by the second total reflector is changed into 1064nm vertical polarized light by the half-wave plate, the 1064nm vertical linear polarized light sequentially passes through the Brewster mirror, the Nd: YAG laser crystal and the polarization switch in the vertical polarization state, and the 1064nm laser passes through the 1064nm output coupling mirror and then is output by the 1064nm semi-transmission semi-reflection mirror.
4. A method of switching output continuous orthogonally polarized laser light using the apparatus of claim 1, characterized by: when the signal synchronous controller controls the automatic closing switch to be switched off, 1.9 mu m horizontal linear polarized light generated by the 1.9 mu m horizontal linear polarized continuous light laser sequentially passes through the resonant cavity input cavity mirror and the Brewster mirror, and the pumping power of the laser is controlled to enable the 1.9 mu m horizontal linear polarized light to pass through the Hol, LLF laser crystal to generate 2 mu m horizontal linear polarized light, and after the 2 mu m horizontal linear polarized light passes through the 2 mu m laser output coupling mirror, part of the 2 mu m horizontal linear polarized light passes through the 2 mu m semi-transmission semi-reflection mirror and is output; when the signal synchronous controller controls the automatic closing switch to be closed, 2 mu m horizontal line polarized light reflected by the 2 mu m semi-transmission semi-reflection mirror is reflected by the first total reflector and then passes through the light delayer to adjust the time delay of a light path, the light power is adjusted by the optical attenuator, 2 mu m horizontal polarized light reflected by the second total reflector is changed into 2 mu m vertical polarized light by the half-wave plate, and the 2 mu m vertical linear polarized light is sequentially output by the 2 mu m semi-transmission semi-reflection mirror after passing through the Brewster mirror, the Ho, the LLF laser crystal and the 2 mu m laser output coupling mirror.
5. A method of switching output continuous orthogonal polarization laser using the apparatus of claim 2, characterized by: the control signal synchronous controller switches off the automatic closing switch, 2-micron horizontal linear polarized light generated by the 2-micron laser source passes through the 2-micron laser output coupling mirror, and part of the 2-micron horizontal linear polarized light passes through the 2-micron semi-transmission semi-reflection mirror and is output; the control signal synchronous controller closes the automatic closing switch, 2 mu m horizontal line polarized light reflected by the 2 mu m semi-transmission semi-reflection mirror is reflected by the first total reflection mirror and then passes through the light delayer to adjust the time delay of a light path, the light power is adjusted by the optical attenuator, 2 mu m horizontal polarized light reflected by the second total reflection mirror is changed into 2 mu m vertical polarized light by the half-wave plate, and the 2 mu m vertical linear polarized light is output by the 2 mu m semi-transmission semi-reflection mirror after sequentially passing through the Brewster mirror, the Ho, the LLF laser crystal and the 2 mu m laser output coupling mirror.
6. A method of switching output continuous orthogonal polarization laser using the apparatus of claim 3, characterized by: when the signal synchronous controller controls the automatic closing switch to be switched off, 808nm laser generated by the 808nm semiconductor laser sequentially passes through the resonant cavity input cavity mirror and the Brewster mirror, the 808nm laser passes through the Nd, namely, the YAG laser crystal to generate 1064nm unpolarized light, the 1064nm unpolarized light passes through the polarization switching switch in the horizontal polarization state to obtain 1064nm horizontal linearly polarized light, and after the 1064nm horizontal linearly polarized light passes through the 1064nm laser output coupling mirror, part of the 1064nm horizontal linearly polarized light passes through the 1064nm semi-transmission semi-reflection mirror and is output; when the signal synchronous controller controls the automatic closing switch to be closed, 1064nm horizontal line polarized light reflected by the 1064nm semi-transmission semi-reflection mirror is reflected by the first total reflector and then passes through the light delayer to adjust the time delay of a light path, the light power is adjusted by the light attenuator, the 1064nm horizontal polarized light reflected by the second total reflector is changed into 1064nm vertical polarized light by the half-wave plate, the 1064nm vertical linear polarized light sequentially passes through the Brewster mirror, the Nd: YAG laser crystal and the polarization switch in the vertical polarization state, and the 1064nm laser passes through the 1064nm output coupling mirror and then is output by the 1064nm semi-transmission semi-reflection mirror.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115173207A (en) * | 2022-06-24 | 2022-10-11 | 云南师范大学 | Structure for switching laser wavelength based on optical switch and use method |
| CN115166985A (en) * | 2022-06-28 | 2022-10-11 | 四川大学 | Method for preparing polarization-dependent attenuation element by utilizing ultrafast laser direct writing |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005317743A (en) * | 2004-04-28 | 2005-11-10 | Miyachi Technos Corp | Laser apparatus and laser processing method |
| DE102012222544A1 (en) * | 2012-12-07 | 2014-06-12 | High Finesse Gmbh Laser And Electronic Systems | Laser system i.e. titanium-sapphire laser, for delivering laser light, has splitter surface is aligned such that backreflected portion is divided into beams, and amplifier medium arranged in one of beams against reflected portion of path |
| CN106410585A (en) * | 2016-06-17 | 2017-02-15 | 北京国科世纪激光技术有限公司 | One-way cycle intracavity frequency doubling laser |
| CN111404009A (en) * | 2020-03-21 | 2020-07-10 | 哈尔滨工程大学 | Device and method for outputting orthogonal polarization laser based on double Brewster window multiports |
| US20210234330A1 (en) * | 2018-06-05 | 2021-07-29 | South China University Of Technology | A Transverse Mode Switchable All-Fiber High-Order Mode Brillouin Laser |
| CN113285339A (en) * | 2021-05-19 | 2021-08-20 | 张振国 | Polarization output ring resonator with tunable output rate and adjustable output mirror |
-
2022
- 2022-01-20 CN CN202210066922.7A patent/CN114520459B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005317743A (en) * | 2004-04-28 | 2005-11-10 | Miyachi Technos Corp | Laser apparatus and laser processing method |
| DE102012222544A1 (en) * | 2012-12-07 | 2014-06-12 | High Finesse Gmbh Laser And Electronic Systems | Laser system i.e. titanium-sapphire laser, for delivering laser light, has splitter surface is aligned such that backreflected portion is divided into beams, and amplifier medium arranged in one of beams against reflected portion of path |
| CN106410585A (en) * | 2016-06-17 | 2017-02-15 | 北京国科世纪激光技术有限公司 | One-way cycle intracavity frequency doubling laser |
| US20210234330A1 (en) * | 2018-06-05 | 2021-07-29 | South China University Of Technology | A Transverse Mode Switchable All-Fiber High-Order Mode Brillouin Laser |
| CN111404009A (en) * | 2020-03-21 | 2020-07-10 | 哈尔滨工程大学 | Device and method for outputting orthogonal polarization laser based on double Brewster window multiports |
| CN113285339A (en) * | 2021-05-19 | 2021-08-20 | 张振国 | Polarization output ring resonator with tunable output rate and adjustable output mirror |
Non-Patent Citations (2)
| Title |
|---|
| BING BAI ECT.: "Double Q-switched 946 nm laser with MgO:LN electro-optic crystal and MoSe2 saturable absorber", 《CHINESE OPTICS LETTERS》, pages 031402 * |
| 许祺峰: "自注入延时反馈Ho:LLF正交偏振激光动力学特性研究", 《中国优秀硕士学位论文全文数据库 (基础科学辑)》, pages 005 - 135 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115173207A (en) * | 2022-06-24 | 2022-10-11 | 云南师范大学 | Structure for switching laser wavelength based on optical switch and use method |
| CN115166985A (en) * | 2022-06-28 | 2022-10-11 | 四川大学 | Method for preparing polarization-dependent attenuation element by utilizing ultrafast laser direct writing |
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