CN116683270A - Adjustable orthogonal polarization dual-wavelength laser based on acousto-optic filter - Google Patents
Adjustable orthogonal polarization dual-wavelength laser based on acousto-optic filter Download PDFInfo
- Publication number
- CN116683270A CN116683270A CN202310856929.3A CN202310856929A CN116683270A CN 116683270 A CN116683270 A CN 116683270A CN 202310856929 A CN202310856929 A CN 202310856929A CN 116683270 A CN116683270 A CN 116683270A
- Authority
- CN
- China
- Prior art keywords
- light
- acousto
- polarization
- wedge angle
- optic filter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000010287 polarization Effects 0.000 title claims abstract description 83
- 230000003287 optical effect Effects 0.000 claims abstract description 39
- 230000009977 dual effect Effects 0.000 claims description 13
- LAJZODKXOMJMPK-UHFFFAOYSA-N tellurium dioxide Chemical compound O=[Te]=O LAJZODKXOMJMPK-UHFFFAOYSA-N 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 5
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 239000006185 dispersion Substances 0.000 abstract description 4
- 230000009471 action Effects 0.000 abstract description 2
- 238000005388 cross polarization Methods 0.000 abstract 1
- 239000013078 crystal Substances 0.000 description 14
- 230000001105 regulatory effect Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000005086 pumping Methods 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- 238000001069 Raman spectroscopy Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 1
- 238000010183 spectrum analysis Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
Classifications
-
- 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
- H01S3/10061—Polarization control
-
- 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
- H01S3/1068—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 an acousto-optical device
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
An adjustable orthogonal polarization dual-wavelength laser based on an acousto-optic filter comprises a broadband light source, a half-wave plate, the acousto-optic filter, a radio frequency drive, a light shielding plate, a first optical wedge angle block, a second optical wedge angle block, a reflecting mirror and a polarization beam splitting prism. The polarization direction of the broadband light source is controlled through the half wave plate, after linearly polarized light with a certain angle passes through the acousto-optic filter, two diffraction lights (o light and e light) with the cross polarization of +/-1 level, which are matched with the linearly polarized light, are diffracted under the action of ultrasonic waves with specific frequency, and finally, the two diffraction lights with similar wavelengths are combined into one beam to be output through the polarization beam splitting prism. The invention realizes the output of the wavelength and power tunable orthogonal polarization dual-wavelength laser signal by controlling the angles of the driving radio frequency signal and the half wave plate, and the first optical wedge angle block and the second optical wedge angle block are used for reducing the diffraction light drift caused by dispersion.
Description
Technical Field
The invention belongs to the technical field of laser, and particularly relates to an adjustable orthogonal polarization dual-wavelength laser based on an acousto-optic filter, which can output an orthogonal polarization dual-wavelength laser with variable wavelength and adjustable polarization power.
Background
The two lasers with similar wavelengths and orthogonal polarization states comprise two lasers which are linearly polarized and have orthogonal polarization states, and the wavelengths of the two lasers with the orthogonal polarization states are similar.
The dual-wavelength laser is widely applied to laser medical treatment, spectrum analysis, laser ranging, laser radar, terahertz wave and other aspects due to the unique polarization characteristics.
The laser crystal can obtain dual-wavelength laser output, and is influenced by crystal lattice structure, so that polarized laser is difficult to generate by the laser crystal with isotropic structure, and unbiased dual-wavelength laser output is mostly required to be obtained by means of spectral line inhibition or polarization modulation. And different polarization spectral lines emitted by transitions between different energy levels and sub-energy levels of the laser crystal with the anisotropic structure have orthogonal polarization characteristics, and orthogonal polarization dual-wavelength output with specific wave bands can be obtained through different cutting directions.
Nd doped with neodymium 3+ Is often used as a working medium to obtain orthogonally polarized dual wavelengths. For example, crystals such as Nd: YLF (Optics letters, vol.40, p3979-3981, 2010; NC 102468599B), nd: YAG (Photonics Research, vol.6 (8), p815-820, 2018) and the like can realize the same-light-path output of the orthogonal polarized dual-wavelength laser through a proper frequency selection mode, resonant cavity design and polarization control under the action of pumping light.
In recent years, related scholars have conducted intensive studies on the related characteristics of the orthogonal polarized dual wavelengths. For example, by utilizing the fact that the raman main peak frequency shifts of the KGW crystal are different in different polarization directions and combining with a half-wave plate, the power adjustment (CN 111180987 a) of two wavelengths in the orthogonal polarized output light is realized, the power adjustment mode is simple, but the output laser wavelength is fixed, and flexible tuning is difficult to realize. Or two sets of pumping sources are used for pumping two working media, pumping power is controlled, the effect of adjusting and outputting dual-wavelength power is achieved, two sets of independent crystal temperature control systems drift the wavelength of output laser when the central temperature of the working media is changed, and the wavelength can be adjusted while the output power is controlled based on the system, but the whole structure is complex and is easy to be interfered by temperature.
Therefore, how to realize the orthogonal polarization dual-wavelength laser in a simple and easy-to-operate manner, and adjust the wavelength and power of the output laser becomes a technical problem to be solved in the prior art.
Disclosure of Invention
The invention aims to provide an adjustable orthogonal polarization dual-wavelength laser based on an acousto-optic filter. The laser output with double wavelengths, which are similar in wavelength and are orthogonally polarized, is obtained by utilizing the characteristics that the + -1 diffracted lights of the acousto-optic filter are mutually orthogonally polarized and have different tuning relations, and the wavelength tuning and the power adjustment of the output laser are realized through the control of the radio frequency and the polarization.
To achieve the purpose, the invention adopts the following technical scheme:
an acousto-optic filter based tunable cross-polarized dual wavelength laser comprising:
the device comprises a broadband light source, a half wave plate, an acousto-optic filter, a radio frequency drive, a first optical wedge angle block, a second optical wedge angle block, a reflecting mirror and a polarization beam splitter prism;
wherein the broadband light source is configured to emit a first linearly polarized light,
the half-wave plate is used for controlling the polarization direction of the first linearly polarized light to obtain second linearly polarized light, and the second linearly polarized light is incident to the acousto-optic filter;
the acousto-optic filter is used for diffracting the second linearly polarized light under the control of the radio frequency drive to diffract +1o-level light and-1e-level light, wherein the o-level light and the e-level light are mutually orthogonally polarized;
the radio frequency drive is connected with the acousto-optic filter and used for controlling the generation and frequency of ultrasonic waves;
the first optical wedge angle block is used for making the +1st-order o light incident to the polarization beam splitter prism;
the second optical wedge angle block is used for making the-1 level e light incident to the polarization beam splitter prism;
specifically, the reflecting mirror is used for guiding one beam of +1-level o light passing through the first optical wedge angle block and the-1-level e light passing through the second optical wedge angle block to be incident to the polarization beam splitter prism;
the other beam of the +1st-order o light passing through the first optical wedge angle block and the-1st-order e light passing through the second optical wedge angle block is directly incident to the polarization beam splitter prism;
the polarization beam splitter prism is used for outputting the incident +1st-level o light and the incident-1st-level e light in a same-light path mode.
Optionally, a light shielding plate is further provided on the other side of the acousto-optic filter opposite to the half-wave plate, and the light shielding plate is located on the same optical axis with the broadband light source, the half-wave plate and the acousto-optic filter.
Optionally, the wavelength of the broadband light source is selected according to the requirement.
Optionally, the broadband light source is a SLED light source with a bandwidth >40nm.
Optionally, the half wave plate, the acousto-optic filter, the first optical wedge angle block and the second optical wedge angle block are plated with antireflection films corresponding to the wavelengths of the light beams; the reflecting mirror is plated with a high-reflection film corresponding to the wavelength of the light beam; the reflection inclined plane of the polarization beam splitter prism is plated with a polarization film corresponding to the wavelength of the light source, and the transmission end face is plated with an antireflection film corresponding to the wavelength of the light source.
Optionally, the acousto-optic filter works based on an abnormal acousto-optic effect, and the selected acousto-optic medium is off-axis slow-cutting tellurium dioxide, and when acousto-optic diffraction occurs, the polarization state of diffracted light changes; the +1-level diffraction light and the-1-level diffraction light have different but similar tuning relations, and simultaneously output orthogonal polarized dual-wavelength laser with similar wavelengths.
Optionally, the half-wave plate is rotatable, the polarization direction of the incident ray polarized light is changed by rotating the half-wave plate, and the component ratio of the e light and the o light in the second linear polarized light in the two polarization directions is controlled, so that the power adjustment of the output orthogonal polarized dual-wavelength is realized.
Optionally, the light shielding plate is a metal panel with black oxidized surface and sandblasted.
The invention has the following advantages:
1. the polarization state of incident light is regulated by using a half-wave plate, so that the ratio of o light to e light after passing through an acousto-optic filter is controlled, and the power regulation of output orthogonal polarization dual-wavelength is realized.
2. By varying the frequency signal output by the RF drivefThe wavelength of the + -1 diffracted light is adjusted, and the diffraction wavelength lambda of the final output can be controlled.
3. The first optical wedge angle block and the second optical wedge angle block are used for reducing diffraction light drift caused by chromatic dispersion.
Drawings
Fig. 1 is a schematic structural diagram of an acousto-optic filter-based tunable orthogonal polarization dual wavelength laser according to an embodiment of the present invention.
FIG. 2 is a first set of tuning relationships for orthogonally polarized light in the 1060+ -30 nm wavelength range, in accordance with an embodiment of the present invention.
FIG. 3 is a second set of tuning relationships for orthogonally polarized light in the 1060+ -30 nm wavelength range, in accordance with an embodiment of the present invention.
FIG. 4 is a set of tuning relationships for orthogonally polarized light in the 600-1400nm wavelength range, in accordance with an embodiment of the present invention.
The technical features indicated by the reference numerals in the drawings are as follows:
10. a broadband light source; 11. a half-wave plate; 12. a first linearly polarized light; 13. a second linearly polarized light; 20. a radio frequency drive; 21. an acousto-optic filter; 22. partial light; 23. o light; 24. e, light; 4. a light shielding plate; 5. a first wedge block; 6. a first wedge block; 7. a reflecting mirror; 8. a polarization beam splitter prism.
Description of the embodiments
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
The invention mainly comprises the following steps: the polarized broadband light source is used as a light source, the polarization state of incident light is regulated by the half-wave plate, so that the o-light and e-light ratio after passing through the acousto-optic filter is controlled, the power of a light beam is regulated, the wavelength of + -1 diffracted light is regulated by the acousto-optic filter, and finally the two light beams are combined, so that the dual-wavelength laser with similar wavelength and orthogonal polarization is obtained.
Specifically, referring to fig. 1, there is shown an acousto-optic filter based tunable orthogonal polarization dual wavelength laser comprising: the device comprises a broadband light source 10, a half-wave plate 11, an acousto-optic filter 21, a radio frequency driver 20, a first optical wedge angle block 5, a second optical wedge angle block 6, a reflecting mirror 7 and a polarization splitting prism 8;
wherein the broadband light source 10 is configured to emit a first linearly polarized light 12 of high polarization, and in an alternative embodiment is a SLED light source having a bandwidth of >40nm.
The wavelength of the broadband light source 10 may be selected according to the need, for example, 1060±30nm wavelength range, or 600-1400nm wavelength range.
The half-wave plate 11 is configured to control a polarization direction of the first linearly polarized light 12 to obtain a second linearly polarized light 13, where the second linearly polarized light 13 is incident to the acousto-optic filter 21;
the acousto-optic filter 21 is configured to diffract the second linearly polarized light 13 passing through under the control of the rf driver 20, and diffract the +1st-order o-light 23 and the-1st-order e-light 24, where the o-light 23 and the e-light 24 are polarized orthogonally to each other;
the radio frequency driver 20 is connected with the acousto-optic filter 21 and is used for controlling the generation and frequency of ultrasonic waves;
the first optical wedge angle block 5 is used for making the +1st-order o light 23 incident to the reflecting mirror 7;
the second optical wedge angle block 6 is configured to directly make the-1 level e light 24 incident on the polarization beam splitter prism 8;
in the invention, the first optical wedge angle block and the second optical wedge angle block are used for reducing diffraction light drift caused by dispersion.
The reflecting mirror 7 is used for making the +1st-order o light incident to the polarization beam splitter prism 8;
the polarization beam splitter prism 8 is used for outputting the incident +1st-order o light and the incident-1st-order e light in a same-path and beam combination mode.
In an alternative embodiment, after +1 level o light 23 passes through the first wedge angle block 5, the +1 level o light is reflected by the reflecting mirror 7 and enters the polarization beam splitter prism 8 to be reflected out, while the-1 level e light 24 passes through the second wedge angle block 6 and directly enters the polarization beam splitter prism 8 to be transmitted out, and through adjusting the angles of the reflecting mirror 7 and the polarization beam splitter prism 8, two-level light beams (23, 24) are vertically incident on the surface of the polarization beam splitter prism 8, and finally two orthogonal polarized light beams are output from the same light path.
The invention is not limited thereto, and the-1 level e light 24 can be made to enter the polarization beam splitter through the reflector, the +1 level o light 23 can be directly made to enter the polarization beam splitter 8, and the polarization beam splitter 8 combines the two light beams.
Further, the other side of the acousto-optic filter 21 opposite to the half-wave plate 11 is further provided with a light shielding plate 4, and the light shielding plate 4 is located on the same optical axis as the broadband light source 10, the half-wave plate 11 and the acousto-optic filter 21, so that a part of the light 22 which is not diffracted can be shielded. The light shielding plate 4 may be a metal panel with black oxidized surface and sandblasted.
The acousto-optic filter works based on an abnormal acousto-optic effect, the selected acousto-optic medium is off-axis slow-shear tellurium dioxide, and when acousto-optic diffraction occurs, the polarization state of diffracted light can be changed. The +1-level diffraction light and the-1-level diffraction light have different but similar tuning relations, and can output orthogonal polarized dual-wavelength laser with similar wavelengths.
Specifically, the acousto-optic filter 21 employs an and [110 ]]The direction (also called the t-direction) has an ultrasound pattern with a certain off-axis angle. In this acoustic wave mode, the acousto-optic diffraction has an e→o diffraction mode and an o→e diffraction mode, and both diffraction modes are similar, and the acousto-optic interaction of the e→o diffraction mode is analyzed below. Incident light wave vector in acousto-optic interaction planeK i Diffraction light wave vectorK d And ultrasonic vectorK a Meets the momentum matching conditionK d =K i +K a ). The incident light in the e- & gt o diffraction mode is e light, and diffraction is obtained after the acousto-optic effect occursThe light is o light, and the refractive index of the incident lightn ie And refractive index of diffracted lightn do Decibels are expressed as:
in the method, in the process of the invention,θ i andθ do the incident polar angle and the diffraction polar angle;n e andn o the refractive indices of e-light and o-light for tellurium dioxide crystals are a function of wavelength.
The combination of tangential parallel conditions can be seen as follows:
and then the tuning relation of the non-collinear acousto-optic filter under the e-o diffraction mode is obtained as follows:
similarly, in the o- > e diffraction mode, the tuning relationship of the non-collinear acousto-optic filter is as follows:
in the method, in the process of the invention,V t is a rimtA slow shear wave velocity in the direction of the shear wave,V z is a rimzThe fast shear wave velocity of the direction,θ a is in crystal withtzIn-plane acoustic wave vectortThe angle of the axes, also called off-axis angle.
According to the tuning relation of the two diffraction modes, the two-stage diffraction light is orthogonally polarized and similar in wavelength under the same radio frequency signal by the non-collinear acousto-optic filter, and the frequency signal output by the radio frequency drive is changedfCan control the diffraction wavelength of final outputλ。
The power ratio of the o light and the e light with mutually orthogonal polarization is dependent on the e light and the o light components entering the acousto-optic filter, the polarization direction of the high-polarization broadband light source 10 is changed by rotating the half-wave plate 11, and the component ratio of the e light and the o light in the second linear polarization 13 in the two polarization directions is controlled, so that the power adjustment of outputting orthogonal polarization dual-wavelength is realized.
Further, the half-wave plate 11, the acousto-optic filter 21, the first optical wedge angle block 5 and the second optical wedge angle block 6 are plated with antireflection films corresponding to the wavelengths of the light sources; the reflecting mirror 7 is plated with a high-reflection film corresponding to the wavelength of the broadband light source 10; the reflecting inclined plane of the polarization beam splitter prism 8 is plated with a polarization film corresponding to the light source wavelength, and the transmitting end face is plated with an antireflection film corresponding to the light source wavelength.
Three corresponding embodiments of the invention are shown below:
examples
FIG. 2 shows a set of tuning relationships for orthogonally polarized light in the 1060+ -30 nm wavelength range, with a non-collinear acousto-optic filter having an off-axis angle of 15℃and an incident polar angle of 36.8 ℃. It can be seen that the tuning relationship of the o light and the e light output is different but similar, and the o light and the e light with different groups of wavelengths can be output by adjusting the frequency of the radio frequency drive. For example, at 113.2MHz frequency, 1064nm o light and 1083nm e light are output; at 115MHz, 1049nm of o-light and 1067nm of e-light are output.
Example two
FIG. 3 shows a second set of tuning relationships for orthogonally polarized light in the 1060+ -30 nm wavelength range, using a non-collinear acousto-optic filter with an off-axis angle of 13 and an incident polar angle of 31. The tuning relation of the output can be controlled by changing the parameters of the acousto-optic filter crystal, and under the tuning relation, the o light of 1049nm and the e light of 1081nm are output at the frequency of 96.9 MHz.
Example III
FIG. 4 shows a set of tuning relationships for orthogonally polarized light in the 600-1400nm wavelength range, using a non-collinear acousto-optic filter with an off-axis angle of 15 and an incident polar angle of 36.8. After the bandwidth of the acousto-optic filter is optimized, the tuning relation in the figure 4 can be applied to a wider wavelength range, and 780nm o light and 793nm e light are output at 158.6MHz frequency; at 88.8MHz, 1342nm of o-light and 1366nm of e-light are output.
The off-axis angle and the incidence polar angle are characteristic parameters of the slow-cutting tellurium dioxide crystal, and the slow-cutting tellurium dioxide crystal is realized by designing and processing the crystal. The tuning curves of the crystals with different designs are different, and can be selected according to the use requirement, for example, in the first embodiment, the radio frequency driving frequency is 115M, o light of 1049nm and e light of 1067nm are output, and the wavelength interval is 18nm; in the second embodiment, the radio frequency driving frequency is 96,9M, the o light of 1049nm and the e light of 1081nm are output, and the wavelength interval is 32nm. Although all o-wavelengths having 1049nm were obtained, the frequencies used were different, the e-lights of the control were also different, and the wavelength intervals were also different.
In summary, the invention has the following advantages:
1. the polarization state of incident light is regulated by using a half-wave plate, so that the ratio of o light to e light after passing through an acousto-optic filter is controlled, and the power regulation of output orthogonal polarization dual-wavelength is realized.
2. By varying the frequency signal output by the RF drivefThe wavelength of the + -1 diffracted light is adjusted, and the diffraction wavelength lambda of the final output can be controlled.
3. The first optical wedge angle block and the second optical wedge angle block are used for reducing diffraction light drift caused by chromatic dispersion.
While the invention has been described in detail in connection with specific preferred embodiments thereof, it is not to be construed as limited thereto, but rather as a result of a simple deduction or substitution by a person having ordinary skill in the art without departing from the spirit of the invention, which is to be construed as falling within the scope of the invention defined by the appended claims.
Claims (8)
1. An acousto-optic filter-based tunable cross-polarized dual wavelength laser, comprising:
the device comprises a broadband light source, a half wave plate, an acousto-optic filter, a radio frequency drive, a first optical wedge angle block, a second optical wedge angle block, a reflecting mirror and a polarization beam splitter prism;
wherein the broadband light source is configured to emit a first linearly polarized light,
the half-wave plate is used for controlling the polarization direction of the first linearly polarized light to obtain second linearly polarized light, and the second linearly polarized light is incident to the acousto-optic filter;
the acousto-optic filter is used for diffracting the second linearly polarized light under the control of the radio frequency drive to diffract +1o-level light and-1e-level light, wherein the o-level light and the e-level light are mutually orthogonally polarized;
the radio frequency drive is connected with the acousto-optic filter and used for controlling the generation and frequency of ultrasonic waves;
the first optical wedge angle block is used for making the +1st-order o light incident to the polarization beam splitter prism;
the second optical wedge angle block is used for making the-1 level e light incident to the polarization beam splitter prism;
specifically, the reflecting mirror is used for guiding one beam of +1-level o light passing through the first optical wedge angle block and the-1-level e light passing through the second optical wedge angle block to be incident to the polarization beam splitter prism;
the other beam of the +1st-order o light passing through the first optical wedge angle block and the-1st-order e light passing through the second optical wedge angle block is directly incident to the polarization beam splitter prism;
the polarization beam splitter prism is used for outputting the incident +1st-level o light and the incident-1st-level e light in a same-light path mode.
2. The tunable orthogonal polarization dual wavelength laser of claim 1, comprising:
the other side of the acousto-optic filter, which is opposite to the half-wave plate, is also provided with a light shielding plate, and the light shielding plate, the broadband light source, the half-wave plate and the acousto-optic filter are positioned on the same optical axis.
3. The tunable cross-polarized dual wavelength laser of claim 1 or 2, comprising:
the wavelength of the broadband light source is selected as required.
4. The tunable orthogonal polarization dual wavelength laser of claim 3, comprising:
the broadband light source is a SLED light source with a bandwidth of >40nm.
5. The tunable orthogonal polarization dual wavelength laser of claim 3, comprising:
the half wave plate, the acousto-optic filter, the first optical wedge angle block and the second optical wedge angle block are plated with antireflection films corresponding to the wavelengths of the light beams; the reflecting mirror is plated with a high-reflection film corresponding to the wavelength of the light beam; the reflection inclined plane of the polarization beam splitter prism is plated with a polarization film corresponding to the wavelength of the light source, and the transmission end face is plated with an antireflection film corresponding to the wavelength of the light source.
6. The tunable orthogonal polarization dual wavelength laser of claim 3, comprising:
the acousto-optic filter works based on an abnormal acousto-optic effect, the selected acousto-optic medium is off-axis slow-cutting tellurium dioxide, and when acousto-optic diffraction occurs, the polarization state of diffracted light changes; the +1-level diffraction light and the-1-level diffraction light have different but similar tuning relations, and simultaneously output orthogonal polarized dual-wavelength laser with similar wavelengths.
7. The tunable orthogonal polarization dual wavelength laser of claim 3, comprising:
the half-wave plate is rotatable, the polarization direction of incident ray polarized light is changed by rotating the half-wave plate, the component ratio of e light and o light in the second linear polarized light in the two polarization directions is controlled, and power adjustment of output orthogonal polarized dual-wavelength is achieved.
8. The tunable orthogonal polarization dual wavelength laser of claim 2, comprising:
the light shielding plate is a metal panel with black oxidized surface and sandblasted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310856929.3A CN116683270A (en) | 2023-07-13 | 2023-07-13 | Adjustable orthogonal polarization dual-wavelength laser based on acousto-optic filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310856929.3A CN116683270A (en) | 2023-07-13 | 2023-07-13 | Adjustable orthogonal polarization dual-wavelength laser based on acousto-optic filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116683270A true CN116683270A (en) | 2023-09-01 |
Family
ID=87787511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310856929.3A Pending CN116683270A (en) | 2023-07-13 | 2023-07-13 | Adjustable orthogonal polarization dual-wavelength laser based on acousto-optic filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116683270A (en) |
-
2023
- 2023-07-13 CN CN202310856929.3A patent/CN116683270A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107463007B (en) | Dual-channel phase jitter suppression device and method for Raman laser system | |
| US4791631A (en) | Wide tolerance, modulated blue laser source | |
| CN109256658A (en) | Infrared double-frequency laser system during one kind is tunable | |
| US20040012837A1 (en) | Programmable acousto-optic device | |
| CN113067239A (en) | Intermediate infrared femtosecond pulse laser | |
| CN109445228B (en) | Double-color same-phase femtosecond infrared laser wavelength conversion device | |
| CN116683270A (en) | Adjustable orthogonal polarization dual-wavelength laser based on acousto-optic filter | |
| CN102354897B (en) | External secondary cascading difference frequency terahertz light source generation device and implementation method | |
| CN111929962A (en) | Device and method for generating multi-wavelength vacuum ultraviolet and deep ultraviolet coherent light source | |
| CN117039604A (en) | Double interference filter special angle composite feedback quantity adjustable semiconductor laser | |
| CN111711059A (en) | High-efficiency femtosecond laser frequency doubling device based on combined lens and adjusting method thereof | |
| CN115102626B (en) | Device and method for realizing space multi-polarization coding | |
| CN106340797B (en) | 2 μm of tunable laser of annular chamber optical parametric oscillator are constituted based on body grating | |
| US6723977B1 (en) | System and method for sensing atmospheric contaminants using transmitter with dual optical parametric oscillators and receiver for the same | |
| CN113078536B (en) | Lateral pumping Nd-MgO-PPLN mid-infrared laser and double-prism wavelength control method thereof | |
| CN114784607A (en) | Tunable optical parametric oscillator | |
| WO2022110284A1 (en) | Method for regulating output power of 213 nm laser, and apparatus thereof | |
| WO2022057695A1 (en) | Spectral broadening device for laser pulse, and laser device | |
| CN113964637A (en) | Laser wavelength switching device | |
| CN216450928U (en) | High-power long-wave infrared ultrafast laser system with adjustable wavelength | |
| CN202817480U (en) | Laser with tunable wavelength | |
| CN202308766U (en) | External twice-cascade-difference-frequency terahertz light source generator | |
| Krizsán et al. | New generation terahertz pulse sources utilizing volume phase holographic gratings | |
| CN1036556C (en) | Multiple wavelength optical parameter laser | |
| CN111416263B (en) | Terahertz source based on non-collinear phase matching difference frequency of phosphorus-germanium-zinc crystal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |