CN114122881A - Dual-wavelength coaxial controllable switching output laser system - Google Patents

Dual-wavelength coaxial controllable switching output laser system Download PDF

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Publication number
CN114122881A
CN114122881A CN202111514664.6A CN202111514664A CN114122881A CN 114122881 A CN114122881 A CN 114122881A CN 202111514664 A CN202111514664 A CN 202111514664A CN 114122881 A CN114122881 A CN 114122881A
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laser
wavelength
lambda
light
output
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王小磊
成巍
马新强
任远
王靖雯
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Shandong Chanyan Qiangyuan Laser Technology Co ltd
Laser Institute of Shandong Academy of Science
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Shandong Chanyan Qiangyuan Laser Technology Co ltd
Laser Institute of Shandong Academy of Science
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Priority to CN202111514664.6A priority Critical patent/CN114122881A/en
Publication of CN114122881A publication Critical patent/CN114122881A/en
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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
    • H01S3/08086—Multiple-wavelength emission
    • H01S3/0809—Two-wavelenghth emission
    • 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
    • H01S3/106—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity
    • H01S3/108—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity using non-linear optical devices, e.g. exhibiting Brillouin or Raman scattering
    • H01S3/1083—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity using non-linear optical devices, e.g. exhibiting Brillouin or Raman scattering using parametric generation
    • 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
    • H01S3/106—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity
    • H01S3/108—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity using non-linear optical devices, e.g. exhibiting Brillouin or Raman scattering
    • H01S3/1086—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity using non-linear optical devices, e.g. exhibiting Brillouin or Raman scattering using scattering effects, e.g. Raman or Brillouin effect
    • 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
    • H01S3/106—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity
    • H01S3/108—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity using non-linear optical devices, e.g. exhibiting Brillouin or Raman scattering
    • H01S3/109—Frequency multiplication, e.g. harmonic generation
    • 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
    • H01S3/11—Mode locking; Q-switching; Other giant-pulse techniques, e.g. cavity dumping

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Lasers (AREA)

Abstract

The invention relates to a dual-wavelength coaxial controllable switching output laser system, which comprises a resonant cavity, a 45-degree reflector, a dichroic mirror and an electric baffle structure, wherein the resonant cavity is provided with a first end and a second end; the resonant cavity is provided with a wavelength lambda1Light exit and wavelength λ2A light outlet; wavelength lambda1The light emitted from the light outlet is reflected by the 45-degree reflecting mirror and the dichroic mirror and then emitted out to output lambda1Laser; from wavelength λ2The laser emitted from the light outlet penetrates through the dichroic mirror and then emits an output lambda2Laser, and output λ1Laser is coaxial; wavelength lambda1The light path from the light outlet to the 45-degree reflector is a light path 1 with a wavelength of lambda2The light path from the light outlet to the dichroic mirror is a light path 2, and the electric baffle plate structure is used for changing the light path1 and on-off state of the optical path 2; the resonant cavity sequentially comprises a first cavity mirror, a Q-switching system, a polarization element, a pumping module, a folding reflector A, a folding reflector B, a wavelength conversion crystal and a second cavity mirror, wherein the two folding reflectors B are 90 degrees. The technical scheme has the advantages of compact structure, high laser switching speed and high reliability.

Description

Dual-wavelength coaxial controllable switching output laser system
Technical Field
The invention relates to the technical field of lasers, in particular to a dual-wavelength coaxial controllable switching output laser system.
Background
The solid laser with freely switched dual wavelengths can switch and output laser with two wavelengths according to different requirements, and the output mode is generally divided into three forms: single output wavelength lambda1Laser of single output wavelength lambda2While outputting a wavelength lambda1And wavelength lambda2The laser of (1). The dual-wavelength freely-switched solid laser has very wide application prospect in the fields of laser ranging, infrared countermeasure, laser radar, environment detection, material processing and the like.
At present, in terms of dual-wavelength switching output, common schemes include several ways as described below, and each has its own drawbacks:
(1) the laser output wavelength is changed by manually replacing the nonlinear crystal. This way, by manual operation, the conversion speed is very slow.
(2) The nonlinear crystal is driven by the electric mechanism to move in and out of the light path, and the output wavelength of the laser is changed. In the mode, the electric mechanism drives the nonlinear crystal to move and change, the operation of the electric mechanism has errors, the reliability is poor, and the switching speed is slow.
(3) The polarization state of the first wavelength laser is controlled by controlling whether high voltage is applied to the electro-optical crystal or not, then the transmission direction of the first wavelength laser is switched by utilizing the polarization light splitting element, and the first wavelength laser passes through or does not pass through the nonlinear crystal to realize wavelength conversion, so that two wavelength lasers are respectively output. In this manner, the high voltage applied to the electro-optic crystal tends to interfere with other electronic components.
Disclosure of Invention
The invention aims to solve the technical problem of making up the defects of the prior art and provides a dual-wavelength coaxial controllable switching output laser system.
To solve the technical problems, the technical scheme of the invention is as follows:
a dual-wavelength coaxial controllable switching output laser system is characterized in that: comprises a resonant cavity, a 45-degree reflector, a dichroic mirror and an electric baffle structure; the reflecting surfaces of the 45-degree reflecting mirror and the dichroic mirror are arranged in parallel, and the resonant cavity is provided with a wavelength lambda1Light exit and wavelength λ2A light outlet; from wavelength λ1The laser emitted from the light outlet is reflected by the 45-degree reflector and the dichroic mirror in sequence and then emitted, and the emitted light is output lambda1Laser; from wavelength λ2The laser emitted from the light outlet is transmitted through the dichroic mirror and then emitted, and the emitted light is output lambda2Laser; output lambda1Laser and output lambda2Laser is coaxial;
from wavelength λ1The light path from the light outlet to the 45-degree reflector is a light path 1 from the wavelength lambda2The light path from the light outlet to the dichroic mirror is a light path 2, and the electric baffle structure is used for enabling the states of the light path 1 and the light path 2 to be on or off;
a first cavity mirror, a Q-switching system, a polarization element, a pumping module, a folding reflector A, a folding reflector B, a wavelength conversion crystal and a second cavity mirror are sequentially arranged in the resonant cavity, and the reflecting surfaces of the folding reflector A and the folding reflector B are arranged at 90 degrees;
the pump module is used for generating a wave length of lambda1Of a laser of wavelength λ1The laser light of (2) passes through a polarization element and then becomes polarization lambda1Laser, polarization lambda1The laser light becomes a pulse lambda after passing through a Q-switching system1Laser, pulse lambda1The first part of the laser passes through the first cavity mirror and passes through the wavelength lambda1The light is emitted from the light outlet; pulse lambda1The second part of the laser is reflected by the first cavity mirror and then sequentially passes through the modulatorQ system, polarization element and crystal rod in pump module, then sequentially passing through the reflection of folding mirror A and folding mirror B to wavelength conversion crystal, pulse lambda1The second part of the laser light passes through the wavelength conversion crystal and becomes lambda2Of a laser of wavelength λ2The laser penetrates through the second cavity mirror and has a wavelength lambda2And the light outlet emits light.
Further, the coating of first chamber mirror is characterized by: let the wavelength be lambda1Is partially transmitted so that the wavelength is lambda2The light of (2) is highly reflective; the coating of second chamber mirror is characterized in that: let the wavelength be lambda2Is partially transmitted so that the wavelength is lambda1The light of (2) is highly reflective; the coating characteristics of the folding reflector A and the folding reflector B are as follows: let the wavelength be lambda1Of light and having a wavelength of lambda2All the light of (2) is highly reflective.
Further, an optical filter is arranged in the optical path 2 and used for filtering the wavelength λ1Of (2) is detected.
Further, the device also comprises an indicating light source, wherein the indicating light source emits light and outputs lambda1Laser, output lambda2Laser coaxial for indicating output lambda1Laser, output lambda2The direction of the laser light.
Further, the wavelength range of the light emitted by the indicating light source is 500-700 nm.
Further, still include power monitoring devices, power monitoring devices's probe setting is in dichroscope department for thereby obtain output lambda through detecting the energy of revealing the laser1Laser and/or output lambda2The energy of the laser.
Furthermore, a probe of the power monitoring device is of a pyroelectric type, and energy monitoring is achieved by detecting heat of laser light irradiating a photosensitive element of the probe.
Furthermore, the Q-switching mode of the Q-switching system is one of electro-optical Q-switching, acousto-optical Q-switching and passive Q-switching.
Further, the wavelength conversion crystal is one of a frequency doubling crystal, an optical parametric oscillation crystal and a Raman crystal.
Further, the electric blocking piece structure comprises a motor and a light shielding piece, the light shielding piece is fixed on an output shaft of the motor, the output shaft of the motor is positioned between the light path 1 and the light path 2, and when the output shaft of the motor rotates by 90 degrees, the light shielding piece enables the state of the light path 2 to be 'off' and the state of the light path 1 to be 'on'; when the output shaft of the motor rotates to 90 degrees, the shading sheet enables the state of the light path 1 to be off, and simultaneously the state of the light path 2 to be on; when the output shaft of the motor rotates by 0 degree, the states of the light path 1 and the light path 2 are both 'on'.
The invention can achieve the following beneficial effects:
(1) the state of the light path 1 and the light path 2 is 'on' or 'off' through the electric baffle plate structure, and coaxial output lambda is obtained through the dichroic mirror1Laser and output lambda2Laser, so as to realize the coaxial controllable switching output of the dual-wavelength laser;
(2) the folding reflector A and the folding reflector B are adopted to enable the resonant cavity to be a folding cavity, so that the size of the laser can be greatly reduced, and the compactness of the laser can be improved;
(3) no interference is caused to any electronic element in the process of switching output;
(4) the time length of driving the shading sheet to rotate 180 degrees by adopting a commercially available motor is less than 1ms, the switching speed is very high, and the reliability is high.
Drawings
FIG. 1 shows an embodiment of the present invention emitting an output λ simultaneously1Laser and output lambda2A state schematic diagram of the laser;
FIG. 2 shows an embodiment of the present invention emitting an output λ1A state schematic diagram of the laser;
FIG. 3 shows an embodiment of the present invention emitting an output λ2A state schematic diagram of the laser;
in the figure: the device comprises a first cavity mirror 1, a second cavity mirror 2, a Q-switching system 3, a polarization element 4, a pumping module 5, a folding reflector A, a folding reflector B6, a wavelength conversion crystal 7, a second cavity mirror 8, an optical filter 9, an electric baffle structure 10, a power monitoring device 11, a dichroic mirror 12, a reflector 13-45 degrees and an indicating light source 14.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Examples
A dual-wavelength coaxial controllable switching output laser system comprises a resonant cavity, a 45-degree reflector 13, a dichroic mirror 12 and an electric baffle structure 10; the reflecting surfaces of the 45-degree reflecting mirror 13 and the dichroic mirror 12 are arranged in parallel, and the resonant cavity is provided with a wavelength lambda1Light exit and wavelength λ2A light outlet; from wavelength λ1The laser emitted from the light outlet is reflected by the 45-degree reflecting mirror 13 and the dichroic mirror 12 in sequence and then emitted, and the emitted light is output lambda1Laser; from wavelength λ2The laser light emitted from the light outlet passes through the dichroic mirror 12 and is emitted as output λ2Laser; output lambda1Laser and output lambda2The laser is coaxial.
From wavelength λ1The light path from the light outlet to the 45 DEG reflector 13 is a light path 1 from the wavelength lambda2The light path from the light outlet to the dichroic mirror 12 is the light path 2, and the electric barrier structure 10 is used to make the states of the light path 1 and the light path 2 "on" or "off".
The electric baffle structure 10 has the following specific structure: the light path protection device comprises a motor and a light shielding sheet, wherein the light shielding sheet is fixed on an output shaft of the motor, the output shaft of the motor is positioned between a light path 1 and a light path 2, and when the output shaft of the motor rotates by 90 degrees, the light shielding sheet enables the state of the light path 2 to be 'off' and the state of the light path 1 to be 'on'; when the output shaft of the motor rotates to 90 degrees, the shading sheet enables the state of the light path 1 to be off, and simultaneously the state of the light path 2 to be on; when the output shaft of the motor rotates by 0 degree, the states of the light path 1 and the light path 2 are both 'on'. The duration of driving the shading sheet to rotate 180 degrees by adopting a commercially available motor is less than 1ms, namely the switching time of the light path is less than 1ms, the switching speed is very high, and the reliability is high.
The resonant cavity is sequentially provided with a first cavity mirror 1, a Q-switching system 2, a polarization element 3, a pumping module 4, a folding reflector A5, a folding reflector B6, a wavelength conversion crystal 7 and a second cavity mirror 8, and the reflection surfaces of the folding reflector A5 and the folding reflector B6 are arranged at 90 degrees.
The pump module 4 is used for generating a wave length λ1The laser light of (2) is,the pumping module 4 is embodied as a semiconductor laser pumping Nd: YAG crystal, lambda1=1.06 μm, and the temperature control mode of the pumping module 4 is the temperature control of the semiconductor refrigeration chip.
The Q-switching system 2 comprises a DKDP electro-optical Q-switch and a lambda/4 wave plate, and the Q-switching mode is electro-optical Q-switching.
The wavelength conversion crystal 7 is specifically an optical parametric oscillation crystal KTP, and the coating film of the wavelength conversion crystal 7 is characterized by light transmittance increase of 1.06 μm and 1.57 μm in wavelength, and has a transmittance of more than 99%, and adopts class ii non-critical phase matching (the cutting direction is θ =90 °, Φ =0 °).
The wavelength generated by the pump module 4 is λ1The laser light of (2) passes through the polarization element 3 and then becomes a polarization lambda1Laser, polarization lambda1The laser light becomes a pulse lambda after passing through the Q-switched system 21Laser, pulse lambda1The laser is shot to the first cavity mirror 1, [ due to the first cavity mirror 1 for the pulse λ1The transmittance of the laser light is not 100%, which makes the pulse λ1The laser is divided into two parts, a first part and a second part, pulse lambda1The first part of the laser light is in particular the light that is to be transmitted through the first cavity mirror 1, the pulse lambda1The second part of the laser light refers in particular to the light that is to be reflected by the first cavity mirror 1. Pulse λ1A first part of the laser is emitted out through a first cavity mirror 1 through a light outlet with the wavelength lambda 1; pulse lambda1The second part of the laser is reflected by the first cavity mirror 1, then sequentially passes through the Q-switch system 2, the polarizing element 3 and the crystal rod in the pumping module 4 after being reflected, and then sequentially passes through the folding mirror A5 and the folding mirror B6 to be reflected to the wavelength conversion crystal 7, and the pulse lambda is1The second part of the laser light passes through the wavelength conversion crystal 7 and becomes at wavelength λ2λ of laser light of2=1.57 μm and wavelength λ2The laser light passes through the second cavity mirror 8 via the wavelength lambda2And the light outlet emits light. Non-passing wavelength lambda1Light exit and wavelength λ2The light emitted from the light outlet oscillates in the resonant cavity.
The coating characteristics of the first cavity mirror 1 are as follows: let the wavelength be lambda1The light is partially transmitted, and the transmittance is 20-30%; let the wavelength be lambda2High reflection, reflection of lightThe rate is more than 99.8 percent.
The coating characteristics of the second cavity mirror 8 are as follows: let the wavelength be lambda2Is partially transmitted, the transmittance is about 40%; let the wavelength be lambda1The light is high in reflectivity which is more than 99.8%.
The coating characteristics of the folding reflector A5 and the folding reflector B6 are as follows: let the wavelength be lambda1Of light and having a wavelength of lambda2The light is high in reflectivity, and the reflectivity is more than 99.8%.
The coating characteristics of the dichroic mirror 12 are: let the wavelength be lambda1The light is highly reflective, and the reflectivity is 90-95%; let the wavelength be lambda2The light transmittance of the light source is high and is 90-95%.
An optical filter 9 is arranged in the light path 2 for filtering out wavelengths λ1The filter 9 is specifically a narrow band infrared filter with a center wavelength of 1570 nm.
The folding mirror A5 and the folding mirror B6 are adopted, so that the resonant cavity becomes a folding cavity, the size of the laser can be greatly reduced, and the compactness of the laser can be improved; the resonant cavity of the embodiment can effectively compress the wavelength to be lambda2Laser divergence angle of (1).
Further comprises an indicating light source 14, light emitted by the indicating light source 14 and an output lambda1Laser, output lambda2Laser coaxial for indicating output lambda1Laser, output lambda2The direction of the laser; the wavelength range of the light emitted by the indicating light source 14 is 500-700 nm.
The laser detection device further comprises a power monitoring device 11, wherein a probe of the power monitoring device 11 is arranged at the dichroic mirror 12 and used for detecting the energy of leaked laser and combining the dichroic mirror 12 to ensure that the wavelength is lambda1And a wavelength of λ2The reflectivity of the light of (a) is calculated to obtain an output lambda1Laser and/or output lambda2The energy of the laser. The probe of the power monitoring device 11 is of a pyroelectric type, and energy monitoring is realized by detecting heat of laser light irradiated on a photosensitive element of the probe. After detection, the output λ finally obtained after passing through the dichroic mirror 12 in this embodiment1The energy of the laser is about 20 mJ, and the final output lambda is obtained2The energy of the laser is about 5 mJ.
In the description of the present invention, words such as "inner", "outer", "upper", "lower", "front", "rear", etc., indicating orientations or positional relationships, are used for convenience in describing the present invention, and do not indicate or imply that the indicated devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
The above description is only one embodiment of the present invention, and the scope of the present invention is not limited to the above embodiments, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the spirit of the present invention.

Claims (10)

1. A dual-wavelength coaxial controllable switching output laser system is characterized in that: comprises a resonant cavity, a 45-degree reflector (13), a dichroic mirror (12) and an electric baffle structure (10); the reflecting surfaces of the 45-degree reflecting mirror (13) and the dichroic mirror (12) are arranged in parallel, and the resonant cavity is provided with a wavelength lambda1Light exit and wavelength λ2A light outlet; from wavelength λ1The laser emitted from the light outlet is reflected by a 45-degree reflector (13) and a dichroic mirror (12) in sequence and then emitted, and the emitted light is output lambda1Laser; from wavelength λ2The laser light emitted from the light outlet is transmitted through the dichroic mirror (12) and emitted as an output lambda2Laser; output lambda1Laser and output lambda2Laser is coaxial;
from wavelength λ1The light path from the light outlet to the 45-degree reflector (13) is a light path 1 from the wavelength lambda2The light path between the light outlet and the dichroic mirror (12) is a light path 2, and the electric baffle structure (10) is used for enabling the states of the light path 1 and the light path 2 to be 'on' or 'off';
a first cavity mirror (1), a Q-switching system (2), a polarizing element (3), a pumping module (4), a folding reflector A (5), a folding reflector B (6), a wavelength conversion crystal (7) and a second cavity mirror (8) are sequentially arranged in the resonant cavity, and the reflecting surfaces of the folding reflector A (5) and the folding reflector B (6) are arranged at 90 degrees;
the pump module (4) is used for generating a wave length of lambda1Of a laser of wavelength λ1The laser light of (2) passes through a polarization element (3) and then becomes a polarization lambda1Laser, polarization lambda1The laser light becomes a pulse lambda after passing through a Q-switching system (2)1Laser, pulse lambda1The first part of the laser passes through the first cavity mirror (1) and passes through the wavelength lambda1The light is emitted from the light outlet; pulse lambda1The second part of the laser is reflected by a first cavity mirror (1), and after being reflected, the second part of the laser sequentially passes through a Q-switching system (2), a polarization element (3) and a crystal rod in a pumping module (4), and then is reflected to a wavelength conversion crystal (7) sequentially through a folding reflector A (5) and a folding reflector B (6), and a pulse lambda is generated1The second part of the laser light passes through the wavelength conversion crystal (7) and becomes the wavelength lambda2Of a laser of wavelength λ2The laser penetrates through the second cavity mirror (8) and passes through the wavelength lambda2And the light outlet emits light.
2. The dual wavelength coaxial controllable switched output laser system of claim 1, wherein: the coating of first chamber mirror (1) is characterized in that: let the wavelength be lambda1Is partially transmitted so that the wavelength is lambda2The light of (2) is highly reflective; the coating of second chamber mirror (8) is characterized in that: let the wavelength be lambda2Is partially transmitted so that the wavelength is lambda1The light of (2) is highly reflective; the coating characteristics of the folding reflector A (5) and the folding reflector B (6) are as follows: let the wavelength be lambda1Of light and having a wavelength of lambda2All the light of (2) is highly reflective.
3. The dual wavelength coaxial controllable switched output laser system of claim 1, wherein: an optical filter (9) is arranged in the light path 2 and used for filtering the wavelength lambda1Of (2) is detected.
4. The dual wavelength coaxial controllable switched output laser system of claim 1, wherein: also comprises an indicating light source (14), the light emitted by the indicating light source (14) and the output lambda1Laser, output lambda2Laser coaxial for indicating output lambda1Laser, output lambda2The direction of the laser light.
5. The dual wavelength coaxial controllable switched output laser system of claim 4, wherein: the wavelength range of the light emitted by the indicating light source (14) is 500-700 nm.
6. The dual wavelength coaxial controllable switched output laser system of claim 1, wherein: the laser light source further comprises a power monitoring device (11), wherein a probe of the power monitoring device (11) is arranged at the position of the dichroic mirror (12) and used for detecting the energy of leaked laser light to obtain output lambda1Laser and/or output lambda2The energy of the laser.
7. The dual wavelength in-line controllable switched output laser system of claim 6, wherein: the probe of the power monitoring device (11) is of a pyroelectric type, and energy monitoring is achieved by detecting heat of laser irradiated on a photosensitive element of the probe.
8. The dual wavelength coaxial controllable switched output laser system of claim 1, wherein: the Q-switching mode of the Q-switching system (2) is one of electro-optical Q-switching, acousto-optical Q-switching and passive Q-switching.
9. The dual wavelength coaxial controllable switched output laser system of claim 1, wherein: the wavelength conversion crystal (7) is one of a frequency doubling crystal, an optical parametric oscillation crystal and a Raman crystal.
10. The dual wavelength coaxial controllable switched output laser system of claim 1, wherein: the electric blocking piece structure (10) comprises a motor and a shading piece, the shading piece is fixed on an output shaft of the motor, the output shaft of the motor is positioned between the light path 1 and the light path 2, and when the output shaft of the motor rotates by 90 degrees, the shading piece enables the state of the light path 2 to be 'off' and the state of the light path 1 to be 'on'; when the output shaft of the motor rotates to 90 degrees, the shading sheet enables the state of the light path 1 to be off, and simultaneously the state of the light path 2 to be on; when the output shaft of the motor rotates by 0 degree, the states of the light path 1 and the light path 2 are both 'on'.
CN202111514664.6A 2021-12-13 2021-12-13 Dual-wavelength coaxial controllable switching output laser system Pending CN114122881A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116148817A (en) * 2023-04-21 2023-05-23 常州星宇车灯股份有限公司 Dual-wavelength-based TOF laser radar system and anti-interference method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116148817A (en) * 2023-04-21 2023-05-23 常州星宇车灯股份有限公司 Dual-wavelength-based TOF laser radar system and anti-interference method thereof

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