CN102163796A - Magnetic control type stabilizing device for output power of all solid-state laser - Google Patents
Magnetic control type stabilizing device for output power of all solid-state laser Download PDFInfo
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- CN102163796A CN102163796A CN 201110067721 CN201110067721A CN102163796A CN 102163796 A CN102163796 A CN 102163796A CN 201110067721 CN201110067721 CN 201110067721 CN 201110067721 A CN201110067721 A CN 201110067721A CN 102163796 A CN102163796 A CN 102163796A
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Abstract
The invention discloses a magnetic control type stabilizing device for output power of an all solid-state laser, which is characterized by comprising a magnetic control type lens translation device, a completely reflecting mirror, a laser head of the all solid-state laser, an output lens of the all solid-state laser, a 45-degree laser partially reflecting mirror, a photoelectric detector and a controller, wherein the magnetic control type lens translation device drives the completely reflecting mirror of the laser to horizontally move so as to change cavity length; the 45-degree laser partially reflecting mirror is arranged outside a cavity and used for reflecting a small amount of lasers to the photoelectric detector; the photoelectric detector is used for converting collected optical signals into electrical signals and then sending the electrical signals to the controller; and the controller calculates a proper change of the laser cavity length by using internal programs and then sends corresponding drive electrical signals to accurately regulate the horizontal displacement of the magnetic control type lens translation device so as to drive the completely reflecting mirror to horizontally displace to change the cavity length, thus changing losses in the laser cavity, and compensating power fluctuation. By using the device provided by the invention, the effect of stabilizing the output power of the laser can be reached.
Description
Technical field
The present invention relates to all solid state laser technical field, relate in particular to a kind of magnet controlled all solid state laser power output stabilizing arrangement.
Background technology
The power output of all solid state laser can produce periodically or the fluctuation of randomness in time, and its range of application is restricted.At present, the major technique that improves all solid state laser output power stability has the high stability power supply, improves outside laser mechanical stability, the chamber firm power system etc.
Improving the stability of all solid state laser excitation power supply and improving mechanical stability all is the assurance of stabilized lasers power output, but this dual mode has certain limitation, the power output of laser still can change with the change of external environment, and produces the random fluctuation that is difficult to avoid.
The another kind of technology that improves all solid state laser output power stability is to add the power stability system outside laser cavity, this technique device complexity, and the cost height, and can not fundamentally solve the problem of laser output power fluctuation.
Summary of the invention
(1) technical problem that will solve
In view of this,, improve its output power stability, the invention provides a kind of magnet controlled all solid state laser power output stabilizing arrangement in order to overcome the problem of all solid state laser system output-power fluctuation.
(2) technical scheme
For achieving the above object, the invention provides a kind of magnet controlled all solid state laser power output stabilizing arrangement, this device comprises the laser head 103 of magnet controlled eyeglass translating device 101, completely reflecting mirror 102, all solid state laser, outgoing mirror 104,45 ° of laser part speculums 105, photodetector 106 and controllers 107 of all solid state laser, wherein:
It is long that the completely reflecting mirror 102 that magnet controlled eyeglass translating device 101 drives laser moves forward and backward the change chamber; 45 ° of laser part speculums 105 are placed outside the chamber, be used for a small amount of laser-bounce to photodetector 106, photodetector 106 is converted to the signal of telecommunication with the light signal of collecting, then the signal of telecommunication is sent to controller 107, computing calculates the long change amount of suitable laser chamber to controller 107 through internal processes, and the front and back displacement of sending the magnet controlled eyeglass translating device 101 of the accurate adjusting of the corresponding driving signal of telecommunication, it is long to drive displacements change chamber, completely reflecting mirror 102 front and back, thereby change the cavity loss of laser cavity, the compensation power fluctuation.
In the such scheme, when described photodetector 106 detects the laser output power reduction, controller 107 will send and reduce the long signal of telecommunication instruction in chamber, it is long to the chamber that right translation reduces laser cavity that magnet controlled eyeglass translating device 101 drives completely reflecting mirror 102, this moment, cavity loss was corresponding to be reduced, and laser output power improves.When described photodetector 106 detects the laser output power rising, regulate oppositely that then power is reduced.
In the such scheme, described magnet controlled eyeglass translating device 101 integral body are cylindrical, are made of support 201 and electromagnetism translation piston 206 two parts.Described magnet controlled eyeglass translating device 101 also comprises permanent magnet 202, translation shaft 203, fixed spring stent 204, spring 205 and is wrapped in the conductive coil 207 of electromagnetism translation piston 206 outsides that the magnetic field that the magnetic effect of electric current produced when electric current passed through conductive coil 207 and the magnetic field interaction of permanent magnet 202 produce repulsive force or attraction driving electromagnetism translation piston 206 front and back on translation shaft 203 are mobile.
In the such scheme, closely contact and sufficient lubrication between described translation shaft 203 and the electromagnetism translation piston 206.
In the such scheme, have two movable spring supports 208 on the described electromagnetism translation piston 206, these two movable spring supports 208 are connected with spring 205, and the other end of four springs 205 is separately fixed on the fixed spring stent 204.
In the such scheme, the damping when described spring 205 is used to increase electromagnetism translation piston 206 and moves forward and backward, and for electromagnetism translation piston 206 provides restoring force, the electromagnetic force that produces with conductive coil 207 is kept the stress balance of electromagnetism translation piston 206 jointly.
In the such scheme, have gas port 209 on the described electromagnetism translation piston 206, be used for when electromagnetism translation piston 206 seesaws in time discharging the air in the air chamber 210, make interior air pressure of air chamber 210 and ambient pressure always.
In the such scheme, described conductive coil 207 is connected with controller 107, controller 107 is by changing the magnetic field intensity that the size of current Control current produces in the conductive coil 207, interaction force size thereby change is inducted between the magnetic field of magnetic field and permanent magnet 202 drives the 206 front and back displacements of translation piston.
(3) beneficial effect
Magnet controlled all solid state laser power output stabilizing arrangement provided by the invention, adopt adaptive comprehensive compensation method, promptly all can play certain compensating action for the multiple all solid state laser power output factors of instability (for example pumping current fluctuation, the fluctuation of the laser head state of cooling, ambient temperature fluctuation, mechanical oscillation) that cause.The technical solution used in the present invention Costco Wholesale is low, simple, and can utilize this device that existing solid laser system is transformed, and improves the stability of laser output power.
Description of drawings
Fig. 1 is the schematic diagram according to the magnet controlled all solid state laser power output stabilizing arrangement of the embodiment of the invention;
Fig. 2 is according to the structural representation of magnet controlled eyeglass translating device in the magnet controlled all solid state laser power output stabilizing arrangement of the embodiment of the invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in more detail.
Magnet controlled all solid state laser power output stabilizing arrangement provided by the invention, utilize the electro-optical feedback compensation technique, by the real-time dynamic monitoring laser output power and utilize monitor signal regulation and control, drive magnet controlled eyeglass translating device and move that to change the chamber long, dynamically change the cavity loss of laser cavity in real time, reach the effect of stable laser power output.
According to Principles of Laser and experimental results demonstrate, under certain pump power, the power output of all solid state laser changes with the long difference of laser chamber.Generally speaking, the chamber is long long more, and the endovenous laser loss is big more, and power output is low more.The chamber is long short more, and power output is high more.The present invention utilizes this principle, and according to the fluctuation situation of the laser output power of real-time measurement, the chamber that dynamically changes laser cavity is long, and appropriateness increases or reduces laser output power, to reach the purpose of stabilized lasers power output.
Magnet controlled all solid state laser power output stabilizing arrangement provided by the invention is placed 45 ° of partially reflecting mirrors outside the chamber of laser outgoing mirror one end, reflectivity is 1%.The purpose of speculum be with a small amount of laser output reflection to photodetector, reflected optical power size needs suitably should accurately reflect the variation of laser output power, avoids the excessive defective detector of power again.Photodetector is converted to the light signal of collecting the signal of telecommunication and the signal of telecommunication is sent to controller.The signal of telecommunication that controller receives has reflected the size of laser output power in real time.The signal of telecommunication that controller will receive at every turn compares computing with the last signal that receives, calculate the long change amount in suitable chamber, and send and drive the front and back displacement that the signal of telecommunication is accurately regulated magnet controlled eyeglass translating device, change cavity loss, thereby compensation power fluctuation.Magnet controlled eyeglass translating device utilizes the magnetic effect of electric current to produce magnetic field, and acts on generation gravitation or repulsion mutually with the magnetic field of permanent magnet, thereby drives the front and back translation of eyeglass.This device has the characteristics of adaptivity, and it is long to change the chamber according to the change dynamics of power output, thereby reaches the purpose of stablizing power output.
As shown in Figure 1, Fig. 1 is the schematic diagram according to the magnet controlled all solid state laser power output stabilizing arrangement of the embodiment of the invention, and in the present embodiment, magnet controlled all solid state laser power output stabilizing arrangement is applied in the solid state laser.As seen from Figure 1, it is long that the completely reflecting mirror 102 that magnet controlled eyeglass translating device 101 drives laser moves forward and backward the change chamber, and the 103rd, the laser head of all solid state laser, the 104th, the outgoing mirror of all solid state laser.The effect of 45 ° of laser part speculums 105 placing outside the chamber is to photodetector 106 with a small amount of laser-bounce, photodetector 106 is converted to the light signal of collecting the signal of telecommunication of corresponding size, then the signal of telecommunication is sent to controller 107, computing calculates the long change amount of suitable laser chamber to controller 107 through internal processes, and the front and back displacement of sending the magnet controlled eyeglass translating device 101 of the accurate adjusting of the corresponding driving signal of telecommunication, it is long to drive displacements change chamber, completely reflecting mirror 102 front and back, thereby change the cavity loss of laser cavity, the compensation power fluctuation.
In present embodiment as shown in Figure 1, when photodetector 106 detects the laser output power reduction, controller 107 sends and reduces the long signal of telecommunication instruction in chamber, it is long to the chamber that right translation reduces laser cavity that magnet controlled eyeglass translating device 101 drives completely reflecting mirror 102, this moment, cavity loss was corresponding to be reduced, and laser output power improves.When photodetector 106 detected the laser output power rising, system reverse was regulated power is reduced.The magnet controlled all solid state laser power output of the present invention stabilizing arrangement is regulated so fast repeatedly, and the fluctuation of compensate for laser power output is to reach the purpose of stabilized lasers power output.
Described magnet controlled eyeglass translating device 101 is critical components of the present invention.This device 101 is whole cylindrical, and Fig. 2 is two profiles of this device 101.As shown in Figure 2, eyeglass translating device 101 mainly is made up of support 201 and electromagnetism translation piston 206 two large divisions.The 202nd, permanent magnet, the 203rd, translation shaft, the 204th, fixed spring stent, the 205th, spring.Electromagnetism translation piston 206 outside winding conductive coils 207, it is mobile that magnetic field that the magnetic effect of electric current produced when electric current passed through conductive coil 207 and the magnetic field interaction of permanent magnet 202 generation repulsive force or attraction drive electromagnetism translation piston 206 front and back on translation shaft 203.Closely contact and sufficient lubrication between translation shaft 203 and the electromagnetism translation piston 206.
Described electromagnetism translation piston 206 also is a lens supports simultaneously, and shown in Fig. 2 section B-B, electromagnetism translation piston 206 right-hand members are placed eyeglass.Two movable spring supports 208 on the electromagnetism translation piston 206 are connected with spring 205, and the other end of four springs 205 is separately fixed on the fixed spring stent 204.The effect of spring 205 is the dampings when increasing electromagnetism translation piston 206 and moving forward and backward, and for electromagnetism translation piston 206 provides restoring force, and the electromagnetic force that produces with conductive coil 207 is kept the stress balance of electromagnetism translation piston 206 jointly.Gas port 209 is the apertures on the electromagnetism translation piston 206, and its effect is the air of in time discharging when electromagnetism translation piston 206 seesaws in the air chamber 210, makes interior air pressure of air chamber 210 and ambient pressure always.
Described conductive coil 207 is connected with controller 107, controller 107 is by changing the magnetic field intensity that the size of current Control current produces in the conductive coil 207, interaction force size thereby change is inducted between the magnetic field of magnetic field and permanent magnet 202 drives the 206 front and back displacements of translation piston.
It is pointed out that in addition Fig. 1 has only provided one embodiment of the present of invention and schematic diagram, still above description to this embodiment does not constitute any limitation of the invention.The present invention also can be at the laser that is used for other type under the prerequisite of spirit of the present invention.Therefore, be intended to that the present invention is covered and drop in appended claims and the equivalence techniques scheme scope thereof to modification of the present invention and distortion.
Above-described specific embodiment; purpose of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the above only is specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. magnet controlled all solid state laser power output stabilizing arrangement, it is characterized in that, this device comprises the laser head (103) of magnet controlled eyeglass translating device (101), completely reflecting mirror (102), all solid state laser, outgoing mirror (104), 45 ° of laser part speculums (105), photodetector (106) and the controller (107) of all solid state laser, wherein:
It is long that the completely reflecting mirror (102) of magnet controlled eyeglass translating device (101) drive laser moves forward and backward the change chamber; 45 ° of laser part speculums (105) are placed outside the chamber, be used for a small amount of laser-bounce to photodetector (106), photodetector (106) is converted to the signal of telecommunication with the light signal of collecting, then the signal of telecommunication is sent to controller (107), computing calculates the long change amount of suitable laser chamber to controller (107) through internal processes, and the front and back displacement of sending the accurate magnet controlled eyeglass translating device of adjusting of the corresponding driving signal of telecommunication (101), displacement change chamber is long before and after driving completely reflecting mirror (102), thereby change the cavity loss of laser cavity, the compensation power fluctuation.
2. magnet controlled all solid state laser power output stabilizing arrangement according to claim 1, it is characterized in that, when described photodetector (106) detects the laser output power reduction, controller (107) will send and reduce the long signal of telecommunication instruction in chamber, it is long to the chamber that right translation reduces laser cavity that magnet controlled eyeglass translating device (101) drives completely reflecting mirror (102), this moment, cavity loss was corresponding to be reduced, and laser output power improves.
3. magnet controlled all solid state laser power output stabilizing arrangement according to claim 2 is characterized in that, when described photodetector (106) detects the laser output power rising, regulates oppositely that then power is reduced.
4. magnet controlled all solid state laser power output stabilizing arrangement according to claim 1 is characterized in that, described magnet controlled eyeglass translating device (101) is whole cylindrical, is made of support (201) and electromagnetism translation piston (206) two parts.
5. magnet controlled all solid state laser power output stabilizing arrangement according to claim 4, it is characterized in that, described magnet controlled eyeglass translating device (101) also comprises permanent magnet (202), translation shaft (203), fixed spring stent (204), spring (205) and is wrapped in the outside conductive coil (207) of electromagnetism translation piston (206) that magnetic field that the magnetic effect of electric current produced when electric current passed through conductive coil (207) and the magnetic field interaction of permanent magnet (202) generation repulsive force or attraction driving electromagnetism translation piston (206) are gone up front and back at translation shaft (203) and moved.
6. magnet controlled all solid state laser power output stabilizing arrangement according to claim 5 is characterized in that, closely contacts and sufficient lubrication between described translation shaft (203) and the electromagnetism translation piston (206).
7. magnet controlled all solid state laser power output stabilizing arrangement according to claim 5, it is characterized in that, have two movable spring supports (208) on the described electromagnetism translation piston (206), these two movable spring supports (208) are connected with spring (205), and the other end of four springs (205) is separately fixed on the fixed spring stent (204).
8. magnet controlled all solid state laser power output stabilizing arrangement according to claim 7, it is characterized in that, described spring (205) is used to increase the damping of electromagnetism translation piston (206) when moving forward and backward, and provide restoring force for electromagnetism translation piston (206), the electromagnetic force that produces with conductive coil (207) is kept the stress balance of electromagnetism translation piston (206) jointly.
9. magnet controlled all solid state laser power output stabilizing arrangement according to claim 5, it is characterized in that, has gas port (209) on the described electromagnetism translation piston (206), be used in time discharging air in the air chamber (210) when seesawing, make interior air pressure of air chamber (210) and ambient pressure always at electromagnetism translation piston (206).
10. magnet controlled all solid state laser power output stabilizing arrangement according to claim 5, it is characterized in that, described conductive coil (207) is connected with controller (107), controller (107) is by changing the magnetic field intensity that the interior size of current Control current of conductive coil (207) produces, interaction force size thereby change is inducted between the magnetic field of magnetic field and permanent magnet (202) drives translation piston (206) front and back displacement.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011100677210A CN102163796B (en) | 2011-03-21 | 2011-03-21 | Magnetic control type stabilizing device for output power of all solid-state laser |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011100677210A CN102163796B (en) | 2011-03-21 | 2011-03-21 | Magnetic control type stabilizing device for output power of all solid-state laser |
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| CN102163796A true CN102163796A (en) | 2011-08-24 |
| CN102163796B CN102163796B (en) | 2012-07-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013159456A1 (en) * | 2012-04-25 | 2013-10-31 | 青岛镭创光电技术有限公司 | Laser module structure with optical feedback |
| CN105137553A (en) * | 2015-09-10 | 2015-12-09 | 安徽航天生物科技股份有限公司 | Optical fiber adaptive coupling device for solid-state laser |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107171174B (en) * | 2017-06-30 | 2019-04-09 | 中国船舶重工集团公司第七一九研究所 | A kind of laser power stability device based on auxiliary laser |
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| US4972424A (en) * | 1989-05-17 | 1990-11-20 | Hughes Aircraft Company | Automatic dither stabilization of a laser cavity |
| CN1103161A (en) * | 1993-11-26 | 1995-05-31 | 清华大学 | High precision measuring method and device for laser cavity change displacement and refractive index |
| CN1884991A (en) * | 2006-05-26 | 2006-12-27 | 北京工业大学 | Method for measuring tangential and radial thermal focuses of solid laser |
| CN101350494A (en) * | 2008-09-10 | 2009-01-21 | 哈尔滨工业大学 | Method and apparatus for frequency stabilization of accurate separated longitudinal Zeeman laser base on optical power |
| CN101604815A (en) * | 2009-06-26 | 2009-12-16 | 哈尔滨工业大学（威海） | The laser frequency stabiliz ation method of a kind of control impuls laser settling time |
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2011
- 2011-03-21 CN CN2011100677210A patent/CN102163796B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4972424A (en) * | 1989-05-17 | 1990-11-20 | Hughes Aircraft Company | Automatic dither stabilization of a laser cavity |
| CN1103161A (en) * | 1993-11-26 | 1995-05-31 | 清华大学 | High precision measuring method and device for laser cavity change displacement and refractive index |
| CN1884991A (en) * | 2006-05-26 | 2006-12-27 | 北京工业大学 | Method for measuring tangential and radial thermal focuses of solid laser |
| CN101350494A (en) * | 2008-09-10 | 2009-01-21 | 哈尔滨工业大学 | Method and apparatus for frequency stabilization of accurate separated longitudinal Zeeman laser base on optical power |
| CN101604815A (en) * | 2009-06-26 | 2009-12-16 | 哈尔滨工业大学（威海） | The laser frequency stabiliz ation method of a kind of control impuls laser settling time |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2013159456A1 (en) * | 2012-04-25 | 2013-10-31 | 青岛镭创光电技术有限公司 | Laser module structure with optical feedback |
| CN105137553A (en) * | 2015-09-10 | 2015-12-09 | 安徽航天生物科技股份有限公司 | Optical fiber adaptive coupling device for solid-state laser |
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| CN102163796B (en) | 2012-07-04 |
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