CN116260028A - Laser refractive index tuning method, system, device and laser - Google Patents
Laser refractive index tuning method, system, device and laser Download PDFInfo
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- CN116260028A CN116260028A CN202310542982.6A CN202310542982A CN116260028A CN 116260028 A CN116260028 A CN 116260028A CN 202310542982 A CN202310542982 A CN 202310542982A CN 116260028 A CN116260028 A CN 116260028A
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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
- H01S3/005—Optical devices external to the laser cavity, specially adapted for lasers, e.g. for homogenisation of the beam or for manipulating laser pulses, e.g. pulse shaping
- H01S3/0085—Modulating the output, i.e. the laser beam is modulated outside the laser cavity
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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
- H01S3/0014—Monitoring arrangements not otherwise provided for
-
- 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
- H01S3/005—Optical devices external to the laser cavity, specially adapted for lasers, e.g. for homogenisation of the beam or for manipulating laser pulses, e.g. pulse shaping
- H01S3/0078—Frequency filtering
-
- 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
- H01S5/00—Semiconductor lasers
- H01S5/0014—Measuring characteristics or properties thereof
-
- 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
- H01S5/00—Semiconductor lasers
- H01S5/005—Optical components external to the laser cavity, specially adapted therefor, e.g. for homogenisation or merging of the beams or for manipulating laser pulses, e.g. pulse shaping
- H01S5/0078—Optical components external to the laser cavity, specially adapted therefor, e.g. for homogenisation or merging of the beams or for manipulating laser pulses, e.g. pulse shaping for frequency filtering
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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
- H01S5/00—Semiconductor lasers
- H01S5/005—Optical components external to the laser cavity, specially adapted therefor, e.g. for homogenisation or merging of the beams or for manipulating laser pulses, e.g. pulse shaping
- H01S5/0085—Optical components external to the laser cavity, specially adapted therefor, e.g. for homogenisation or merging of the beams or for manipulating laser pulses, e.g. pulse shaping for modulating the output, i.e. the laser beam is modulated outside the laser cavity
Abstract
The invention discloses a laser refractive index tuning method, a system, a device and a laser, which comprise the steps of preprocessing an original laser source to obtain a laser beam to be tuned; setting an optical tuning cavity along the optical path of the laser beam to be tuned, inserting a tuning unit into the optical tuning cavity, enabling the laser beam to be tuned to pass through the tuning unit, and tuning the laser beam to be tuned by the tuning unit by utilizing current to output the tuning laser beam; a re-filtering unit and a detecting unit are arranged at the output end of the laser beam to be tuned passing through the tuning unit. According to the invention, after the original laser source is preprocessed, a regular laser beam is obtained, the regular laser beam is introduced into the optical tuning cavity and is subjected to current tuning through the tuning unit, so that the refractive index in the tuning unit is changed by the current, the tuning of the laser beam is realized, and the refractive index of the laser is changed according to the current. Namely, the defects of slow refractive index change and limited frequency tuning range in the prior art are effectively overcome.
Description
Technical Field
The present invention relates to the field of laser refractive index tuning technologies, and in particular, to a laser refractive index tuning method, system, device, and laser.
Background
In many applications, it is desirable to use a frequency tunable laser in order to accommodate different operating conditions and requirements. Common tuning methods include mechanical tuning and electro-optical tuning. Mechanical tuning typically requires the use of mechanical devices that adjust the cavity length or the position of the cavity mirror, which tend to be relatively complex and expensive. The electro-optic tuning requires voltage or current to control the refractive index in the electro-optic crystal and further adjust the refractive index in the resonant cavity, and the method is simpler than mechanical tuning, but has the problems of slow refractive index change, limited frequency tuning range and the like.
Disclosure of Invention
The invention aims to solve the defects of slow refractive index change and limited frequency tuning range in the prior art, and provides a laser refractive index tuning method, a laser refractive index tuning system, a laser refractive index tuning device and a laser.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the first aspect of the present invention provides a laser refractive index tuning method, comprising:
preprocessing an original laser source to obtain a laser beam to be tuned;
setting an optical tuning cavity along the optical path of the laser beam to be tuned, inserting a tuning unit into the optical tuning cavity, enabling the laser beam to be tuned to pass through the tuning unit, and tuning the laser beam to be tuned by the tuning unit by utilizing current to output the tuning laser beam;
setting a re-filtering unit and a detection unit at the output end of the laser beam to be tuned passing through the tuning unit, and filtering the output of the tuned laser beam by using the re-filtering unit to obtain the laser beam to be detected;
detecting the output power of the laser beam to be detected by using a detection unit, and directly outputting if the output power of the laser beam to be detected meets the rated requirement;
and if the output power of the laser beam to be detected does not meet the rated requirement, repeating the tuning operation of the tuning unit for the laser beam to be detected by using the current until the rated requirement is met.
In some possible embodiments, the tuning unit comprises:
the liquid medium is electrically controlled and is used for matching with the laser wavelength;
the electronic control subunit is electrically connected with the liquid medium and is used for tuning the refractive index in the liquid medium.
In some possible embodiments, the tuning unit uses a voltage method including:
adding a liquid medium into the optical tuning cavity, and enabling the liquid medium to be matched with the laser wavelength;
according to the addition amount of the liquid medium and the electric control tuning amount, an electric control subunit is utilized for inputting tuning current, and the refractive index of the liquid medium is adjusted by adjusting the temperature or the pressure of the liquid medium;
tuning the frequency of the laser beam to be tuned is achieved by changing the refractive index of the liquid medium versus the refractive index in the optical tuning cavity.
In some possible embodiments, the liquid medium comprises: a single liquid or a mixed liquid.
A second aspect of the present invention provides a laser refractive index tuning system, employing a laser refractive index tuning method as described in any one of the first aspects, the tuning system further comprising:
the microprocessor is used for controlling the electric control subunit to output current;
a power detector for detecting laser output power;
and the tunable output mirror is arranged in the optical tuning cavity and is used for carrying out re-filtering on laser output.
In some possible embodiments, the tuning system further comprises: a liquid medium;
wherein the liquid medium is a liquid crystal.
A third aspect of the present invention provides a laser refractive index tuning device employing a laser refractive index tuning method according to any one of the first aspects or a laser refractive index tuning system according to any one of the second aspects.
A fourth aspect of the invention provides a laser employing a laser refractive index tuning method according to any one of the first aspects or a laser refractive index tuning system according to any one of the second aspects.
The beneficial effects of the invention are as follows:
according to the method, after the original laser source is preprocessed, the regular laser beam is obtained, the regular laser beam is introduced into the optical tuning cavity and is subjected to current tuning through the tuning unit, the current changes the refractive index in the tuning unit, tuning of the laser beam is achieved, and the refractive index of the laser is changed according to the current. Namely, the defects of slow refractive index change and limited frequency tuning range in the prior art are effectively overcome.
Drawings
Fig. 1 is a schematic diagram of an overall flow structure of a laser refractive index tuning method according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a laser refractive index tuning method according to an embodiment of the present invention;
fig. 3 is a schematic flow chart of a laser refractive index tuning method according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
In the present invention, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
Examples
With reference to FIGS. 1, 2 and 3, the present invention is directed to solving the above-described background art
The prior art has the defects of slow refractive index change and limited frequency tuning range. According to the method, after the original laser source is preprocessed, the regular laser beam is obtained, the regular laser beam is introduced into the optical tuning cavity and is subjected to current tuning through the tuning unit, the current changes the refractive index in the tuning unit, tuning of the laser beam is achieved, and the refractive index of the laser is changed according to the current. Namely, the defects of slow refractive index change and limited frequency tuning range in the prior art are effectively overcome.
Specifically, the first aspect of the present invention provides a laser refractive index tuning method, which includes:
preprocessing an original laser source to obtain a laser beam to be tuned; wherein, the method for preprocessing the original laser source comprises, but is not limited to: after the filtering and impurity removal are carried out on the original laser source, the influence of stray light is removed after the original laser source is regulated, so that the subsequent tuning effect on laser is ensured.
Setting an optical tuning cavity along the optical path of the laser beam to be tuned, inserting a tuning unit into the optical tuning cavity, enabling the laser beam to be tuned to pass through the tuning unit, and tuning the laser beam to be tuned by the tuning unit by utilizing current to output the tuning laser beam;
setting a re-filtering unit and a detection unit at the output end of the laser beam to be tuned passing through the tuning unit, and filtering the output of the tuned laser beam by using the re-filtering unit to obtain the laser beam to be detected;
detecting the output power of the laser beam to be detected by using a detection unit, and directly outputting if the output power of the laser beam to be detected meets the rated requirement; and if the output power of the laser beam to be detected does not meet the rated requirement, repeating the work until the rated requirement is met. That is, in this embodiment, the tuning unit performs output tuning of the laser beam to be tuned by means of voltage.
In this embodiment, in order to facilitate understanding of how the tuning unit performs laser refractive index tuning using current or voltage, the tuning unit includes: the liquid medium is electrically controlled and is used for matching with the laser wavelength; the electronic control subunit is electrically connected with the liquid medium and is used for tuning the refractive index in the liquid medium. In addition, to facilitate understanding how the tuning unit controls the refractive index by using current, the tuning unit uses a voltage method including:
adding a liquid medium into the optical tuning cavity, and enabling the liquid medium to be matched with the laser wavelength;
according to the addition amount of the liquid medium and the electric control tuning amount, an electric control subunit is utilized for inputting tuning current, and the refractive index of the liquid medium is adjusted by adjusting the temperature or the pressure of the liquid medium;
tuning the frequency of the laser beam to be tuned is achieved by changing the refractive index of the liquid medium versus the refractive index in the optical tuning cavity. I.e. adding a certain liquid medium in the optical path along the laser beam and matching it with the laser wavelength; regulating the temperature or pressure of the liquid medium by inputting current, and regulating the refractive index of the liquid medium; the refractive index in the liquid medium is further changed, so that the refractive index of the laser tuning cavity is adjusted, and the frequency adjustment of the laser is realized. In the above method, the liquid medium may be a single liquid or a mixed liquid, and the selection thereof should be determined according to a desired wavelength range and refractive index variation range. The liquid medium can be added through a reserved small hole and the small hole is sealed after injection; it may also be directly injected into the laser tuning cavity and discharged after the laser tuning experiment is completed. In the embodiment of the invention, the refractive index of the liquid medium used for laser can be widely adjusted by adjusting the temperature and the pressure, so that a larger frequency tuning range is realized on one hand. On the other hand, the refractive index of the liquid medium can respond quickly to changes in temperature and pressure, and therefore, the tuning speed is very fast. And compared with the traditional mechanical tuning and electro-optical tuning, the method provided by the invention does not need any complicated mechanical device or electrical element, and has the advantages of simple structure, low maintenance cost and the like. In addition, the cost of preparing the liquid medium used in the present invention is relatively low compared to electro-optic tuning, and therefore, the cost of the present invention is also relatively low.
It should be noted that, in the present invention, the specific implementation of tuning the laser by using different liquid media should be determined according to the actual situation and needs. The refractive index of the liquid medium may also be adjusted, if desired, by adding other substances, for example ionic liquids in appropriate concentrations to the liquid medium. During experimentation, the laser frequency may be monitored and recorded using a spectrometer or other related instrument to ensure tuning range and frequency stability.
What is claimed is intended to cover in the claims the selection of the type and amount of liquid medium used in the present invention and the specific details of the operation of adjusting the temperature and pressure of the liquid medium. Those skilled in the art will be able to make variations and modifications in light of the specific embodiments of the present invention without departing from the spirit or scope of the invention.
A second aspect of the present invention provides a laser refractive index tuning system, employing a laser refractive index tuning method as described in any one of the first aspects, the tuning system further comprising:
the microprocessor is used for controlling the electric control subunit to output current;
and the power detector is used for detecting the laser output power.
And the tunable output mirror is arranged in the optical tuning cavity and is used for carrying out re-filtering on laser output.
In some possible embodiments, the liquid medium is a liquid crystal. In this embodiment, in the method, the liquid crystal may be a single kind or a mixture, and is determined according to a desired wavelength range and refractive index variation range. The injection of the liquid crystal can be carried out through a reserved small hole, and the small hole is sealed after the injection; it may also be injected directly into the cavity and expelled after the experiment is completed. Setting the liquid medium as liquid crystal, the refractive index in the liquid crystal can be adjusted rapidly by changing the electric field, and thus the tuning speed is faster. In addition, the refractive index of the liquid crystal can realize a large frequency tuning range by changing the electric field. In addition, compared with the traditional mechanical tuning and electro-optical tuning, the method provided by the invention does not need any complicated mechanical device or electrical element, and has the advantages of simple structure, low maintenance cost and the like. It should also be noted that the liquid crystal electro-optic tuning method can obtain higher tuning accuracy, and the frequency stability and repeatability are better.
The specific embodiments of the present invention should be determined according to actual situations and requirements. The liquid crystal may be a single kind or a mixture, and the selection of the kind and amount of the liquid crystal may be determined according to a desired wavelength range and refractive index variation range. During experimentation, the laser frequency may be monitored and recorded using a spectrometer or other related instrument to ensure tuning range and frequency stability. The injection of the liquid crystal can be carried out through a reserved small hole, and the small hole is sealed after the injection; it may also be injected directly into the cavity and expelled after the experiment is completed. The invention also comprises a circuit and an electric element related to the circuit so as to realize the control of the liquid crystal electric field.
What is claimed is intended to cover in the claims the selection of the type and amount of liquid crystal used in the present invention and the specific details of the operation of the circuits and electrical elements that regulate the electric field of the liquid crystal. Those skilled in the art will be able to make variations and modifications in light of the specific embodiments of the present invention without departing from the spirit or scope of the invention.
A third aspect of the present invention provides a laser refractive index tuning device employing a laser refractive index tuning method according to any one of the first aspects or a laser refractive index tuning system according to any one of the second aspects.
A fourth aspect of the invention provides a laser employing a laser refractive index tuning method according to any one of the first aspects or a laser refractive index tuning system according to any one of the second aspects.
The foregoing description is only of the preferred embodiments of the present disclosure and description of the principles of the technology being employed. It will be appreciated by those skilled in the art that the scope of the invention in the embodiments of the present disclosure is not limited to the specific combination of the above technical features, but encompasses other technical features formed by any combination of the above technical features or their equivalents without departing from the spirit of the invention. Such as the above-described features, are mutually substituted with (but not limited to) the features having similar functions disclosed in the embodiments of the present disclosure.
Claims (8)
1. A method of tuning the refractive index of a laser, comprising:
preprocessing an original laser source to obtain a laser beam to be tuned;
setting an optical tuning cavity along the optical path of the laser beam to be tuned, inserting a tuning unit into the optical tuning cavity, enabling the laser beam to be tuned to pass through the tuning unit, and tuning the laser beam to be tuned by the tuning unit by utilizing current to output the tuning laser beam;
setting a re-filtering unit and a detection unit at the output end of the laser beam to be tuned passing through the tuning unit, and filtering the output of the tuned laser beam by using the re-filtering unit to obtain the laser beam to be detected;
detecting the output power of the laser beam to be detected by using a detection unit, and directly outputting if the output power of the laser beam to be detected meets the rated requirement;
and if the output power of the laser beam to be detected does not meet the rated requirement, repeating the tuning operation of the tuning unit for the laser beam to be detected by using the current until the rated requirement is met.
2. The laser refractive index tuning method according to claim 1, wherein the tuning unit comprises:
the liquid medium is electrically controlled and is used for matching with the laser wavelength;
the electronic control subunit is electrically connected with the liquid medium and is used for tuning the refractive index in the liquid medium.
3. A method of tuning the refractive index of a laser beam according to claim 2, wherein said tuning unit is voltage-dependent, comprising:
adding a liquid medium into the optical tuning cavity, and enabling the liquid medium to be matched with the laser wavelength;
according to the addition amount of the liquid medium and the electric control tuning amount, an electric control subunit is utilized for inputting tuning current, and the refractive index of the liquid medium is adjusted by adjusting the temperature or the pressure of the liquid medium;
tuning the frequency of the laser beam to be tuned is achieved by changing the refractive index of the liquid medium versus the refractive index in the optical tuning cavity.
4. A method of tuning the refractive index of a laser light as claimed in claim 2 or 3, wherein the liquid medium comprises: a single liquid or a mixed liquid.
5. A laser refractive index tuning system employing a laser refractive index tuning method according to any one of claims 1-4, said tuning system further comprising:
the microprocessor is used for controlling the electric control subunit to output current;
a power detector for detecting laser output power;
and the tunable output mirror is arranged in the optical tuning cavity and is used for carrying out re-filtering on laser output.
6. The laser refractive index tuning system of claim 5, wherein the tuning system further comprises: a liquid medium;
wherein the liquid medium is a liquid crystal.
7. A laser refractive index tuning device characterized in that a laser refractive index tuning method according to any one of claims 1-4 or a laser refractive index tuning system according to claim 5 or 6 is used.
8. A laser, characterized in that a laser refractive index tuning method according to any one of claims 1-4 or a laser refractive index tuning system according to claim 5 or 6 is used.
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| CN202310542982.6A CN116260028A (en) | 2023-05-15 | 2023-05-15 | Laser refractive index tuning method, system, device and laser |
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| CN202310542982.6A CN116260028A (en) | 2023-05-15 | 2023-05-15 | Laser refractive index tuning method, system, device and laser |
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