CN107942529A - Pulsewidth switches coaxially with polarization laser and coaxially with polarization laser output method - Google Patents
Pulsewidth switches coaxially with polarization laser and coaxially with polarization laser output method Download PDFInfo
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- CN107942529A CN107942529A CN201711397172.7A CN201711397172A CN107942529A CN 107942529 A CN107942529 A CN 107942529A CN 201711397172 A CN201711397172 A CN 201711397172A CN 107942529 A CN107942529 A CN 107942529A
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- 230000010287 polarization Effects 0.000 title claims abstract description 147
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- 238000012360 testing method Methods 0.000 abstract description 21
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 description 5
- 210000001367 artery Anatomy 0.000 description 4
- 239000013307 optical fiber Substances 0.000 description 4
- 210000003462 vein Anatomy 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/286—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising for controlling or changing the state of polarisation, e.g. transforming one polarisation state into another
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/283—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for beam splitting or combining
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
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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
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- 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
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Abstract
The present invention provides a kind of pulsewidth switching coaxially with polarization laser and coaxially with polarization laser output method, including：First pulse width laser device, the second pulse width laser device, polarization 90 degree of circulators of coaxial device and removable polarization state；First pulse width laser device output level polarised light, the second pulse width laser device output orthogonal polarized light；Arrangement polarizes coaxial device on the output light path of the first pulse width laser device and the output light path of the second pulse width laser device, 90 degree of circulators of arranging movable polarization state on the output light path for polarizing coaxial device.Advantage is：Coaxial same polarization laser is switched by pulsewidth, it is changeable the first pulse width laser device and the second pulse width laser device is exported coaxially with polarization state laser, therefore, the laser beam of distinct pulse widths laser output can share same set of laser amplifier and the test system with same test parameter, reduce the cost of follow up amplifier and test application system and cumbersome degree.
Description
Technical field
The invention belongs to laser treatment technique field, and in particular to a kind of switching of pulsewidth is coaxially the same as polarization laser and same
Axis is the same as polarization laser output method.
Background technology
It is well known that semiconductor laser is because its is small, electricity conversion is high and extensive use the advantages that long lifespan
In every field, for example, being suffered from extensively in fields such as Solid State Laser pumping, material processing, laser medicine, optical fiber laser pumping sources
General application and larger development prospect.
At present, for laser, it is polarization coupling technology to study more technology, will by polarization coupling technology
The output of multiple optical fiber lasers synthesized by optical component it is a branch of, so that the output power of laser and bright be greatly improved
Degree, and single optical fiber laser is it also avoid to improve the situation that power is operated in the limit, ensure high power pulse output
The stabilization of performance and reliable.
The light beam formed by polarization coupling technology, is light that is a kind of while including two kinds of orthogonal polarization states, therefore, by
This obtained light beam can not be amplified by polarizing amplifier, directly output beam can only be used to specifically apply.
However, for some application scenarios, and need not be a branch of by the output synthesis of two optical fiber lasers.For example,
Some occasions, two lasers of separate configurations are respectively laser A and laser B, and the light beam of laser A outputs passes through laser
After amplifier A, into test light beam system；After the light beam of laser B outputs is by laser amplifier B, into test light beam system
System.Needed for test, the light beam of laser A outputs is different with the polarization state of the laser B light beams exported, thus occurs following
Problem：When adjustment test system test parameter, after being tested using test system the laser A light beams exported, it is necessary to
The test parameter of test system is readjusted, test system could be used to test the laser B light beams exported, is thus added
Big testing load；Further, since the polarization state of the laser A and laser B light beams exported is different, therefore, laser A and swash
Light device B needs one laser amplifier of separate configurations, can not share same laser amplifier, thus increase acquisition cost.
The content of the invention
In view of the defects existing in the prior art, the present invention provides a kind of switching of pulsewidth coaxially with polarization laser and coaxial
With polarization laser output method, can effectively solve the above problems.
The technical solution adopted by the present invention is as follows：
The present invention provides a kind of coaxial same polarization laser of pulsewidth switching, including：First pulse width laser device (1), the second arteries and veins
Wide laser (2), polarization 90 degree of circulators (4) of coaxial device (3) and removable polarization state；
First pulse width laser device (1) the output level polarised light, the second pulse width laser device (2) export vertical polarization
Light；Institute is arranged on the output light path of the first pulse width laser device (1) and the output light path of the second pulse width laser device (2)
The coaxial device (3) of polarization is stated, 90 degree of circulators (4) of arranging movable polarization state on the output light path of the coaxial device (3) of polarization.
Preferably, the coaxial device (3) of polarization includes the 1st horizontal polarizer (3.1) and the 2nd horizontal polarizer (3.2)；
On the output light path of the first pulse width laser device (1), the 1st horizontal polarizer is set by Brewster angle
(3.1), make the horizontal polarization light of the first pulse width laser device (1) output wholly transmissive by the 1st horizontal polarizer
(3.1), into main optical path；
On the output light path of the second pulse width laser device (2), the 2nd horizontal polarizer is set by Brewster angle
(3.2), the orthogonal polarized light of the second pulse width laser device (2) output, passes through the reflection of the 2nd horizontal polarizer (3.2)
After effect, the 1st horizontal polarizer (3.1) is reflexed to；Again by the reflex of the 1st horizontal polarizer (3.1) after,
Reflex to the main optical path.
Preferably, described 90 degree of circulators (4) of removable polarization state include 90 degree of circulator driving mechanism and polarization state
Circulator；The driving mechanism is used to drive described 90 degree of circulators of polarization state to enter or leave the main optical path.
Preferably, described 90 degree of circulators of polarization state are half-wave plate or 90 degree of rotors.
Preferably, the circulator driving mechanism includes motor.
Preferably, described moveable 90 degree of circulators (4) of polarization state further include limit switch；When 90 degree of the polarization state
When circulator enters the main optical path, the limit switch disconnects；When described 90 degree of circulators of polarization state leave the main optical path
When, trigger the limit switch conducting.
Preferably, controller is further included；
The controller respectively with the first pulse width laser device (1), the second pulse width laser device (2), the rotation
Device driving mechanism and the limit switch are electrically connected.
Exported the present invention also provides a kind of based on a kind of coaxial same polarization laser of pulsewidth switching coaxially with polarization laser
Method, comprises the following steps：
Step 1, when needing to obtain the coaxial same polarised light of first pulse width laser device (1) output light, controller detection is inclined
Whether 90 degree of circulators of polarization state are on the main optical path, if located in then driving described 90 degree of circulators of polarization state to leave the master
Light path, then performs step 2；If be not located at, step 2 is directly performed；
Step 2, controller starts the first pulse width laser device (1), first pulse width laser device (1) output level polarised light, water
Flat polarised light it is wholly transmissive by polarizing the 1st horizontal polarizer (3.1) in coaxial device (3) after, into main optical path, thus obtain
1st horizontal state of polarization laser beam；
Step 3, when needing to obtain the coaxial same polarised light of second pulse width laser device (2) output light, controller detection is inclined
Whether 90 degree of circulators of polarization state are on the main optical path, if located in then direct execution step 4；If be not located at, described in driving
90 degree of circulators of polarization state enter the main optical path, then perform step 4；
Step 4, controller starts the second pulse width laser device (2), and the second pulse width laser device (2) output orthogonal polarized light, hangs down
After straight reflex of the polarised light by the 2nd horizontal polarizer (3.2), the 1st horizontal polarizer (3.1) is reflexed to；Pass through the 1st again
After the reflex of horizontal polarizer (3.1), 90 degree of circulators of polarization state are incided, 90 degree of circulators of polarization state are by vertical polarization
Light is converted to horizontal polarization light, obtains the 2nd horizontal state of polarization laser beam；The 2nd horizontal state of polarization laser beam and the 1st water
Flat polarization state laser beam is coaxially with the laser beam of polarization state.
Pulsewidth provided by the invention switching coaxially with polarization laser and coaxially with polarization laser output method have with
Lower advantage：
Coaxial same polarization laser is switched by pulsewidth, it is changeable to make the first pulse width laser device and the second pulse width laser device defeated
Go out coaxially with polarization state laser, therefore, the laser beam of distinct pulse widths laser output can share same set of laser amplifier and
Test system with same test parameter, reduces the cost of follow up amplifier and test application system and cumbersome degree.
Brief description of the drawings
Fig. 1 switches coaxially with the principle schematic diagram of polarization laser for pulsewidth provided by the invention；
Wherein：
1- the first pulse width laser devices；2- the second pulse width laser devices；3- polarizes coaxial device；The 1st horizontal polarizers of 3.1-；3.2-
2nd horizontal polarizer；90 degree of circulators of 4- polarization states；5- polarization detectors.
Embodiment
In order to which technical problem, technical solution and beneficial effect solved by the invention is more clearly understood, below in conjunction with
Accompanying drawings and embodiments, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein only to
Explain the present invention, be not intended to limit the present invention.
The present invention provides a kind of coaxial same polarization laser of pulsewidth switching, at different moments respectively to two-way difference arteries and veins
The laser beam that wide laser is sent is handled, and the two-way laser beam after guarantee processing not only coaxially exported, but also same polarization state
Output, so as to dock follow-up same set of amplification light path system, test system or other concrete applications.
With reference to figure 1, pulsewidth switching coaxially includes with polarization laser：First pulse width laser device 1, the second pulse width laser device 2,
Polarize 90 degree of circulators 4 of coaxial device 3 and removable polarization state；Explanation is discussed in detail to this four devices below：
(1) pulse width laser device
Two pulse width laser devices, respectively the first pulse width laser device 1 and the second pulse width laser device 2, the first pulsewidth are configured altogether
1 output level polarised light of laser, the second pulse width laser device 2 output orthogonal polarized light.
(2) coaxial device is polarized
Arrangement polarization is coaxial on the output light path of the first pulse width laser device 1 and the output light path of the second pulse width laser device 2
Device 3, polarizes coaxial device and is used for realization the horizontal polarization light of the first pulse width laser device output and hanging down for the second pulse width laser device output
The same s function of straight polarised light, the present invention is not intended to limit the specific constructive form for polarizing coaxial device, all to realize two-way just
The coaxial structure of polarised light is handed over, in the scope of the present invention.For convenience of understanding the present invention, it is described below a kind of specific
The coaxial device of polarization of structure type：
Following structure type can be used by polarizing coaxial device：Polarizing coaxial device 3 includes the level of the 1st horizontal polarizer the 3.1 and the 2nd
Polarizer 3.2；
On the output light path of the first pulse width laser device 1, the 1st horizontal polarizer 3.1 is set by Brewster angle, makes first
The horizontal polarization light that pulse width laser device 1 exports is wholly transmissive by the 1st horizontal polarizer 3.1, into main optical path；
On the output light path of the second pulse width laser device 2, the 2nd horizontal polarizer 3.2, the second arteries and veins are set by Brewster angle
The orthogonal polarized light that wide laser 2 exports, after the reflex by the 2nd horizontal polarizer 3.2, reflexes to the 1st horizontal polarization
Piece 3.1；Again by the reflex of the 1st horizontal polarizer 3.1 after, reflex to main optical path.
It is coaxial to be achieved in the polarised light that the polarised light of the first pulse width laser device 1 output and the second pulse width laser device 2 export
Effect.
(3) 90 degree of circulators of polarization state are moved
Removable 90 degree of circulators 4 of polarization state are mainly used for carrying out the orthogonal polarized light of the second pulse width laser device 2 output
Polarization converted, is changed into horizontal polarization light, so that the polarization state of its horizontal polarization light exported with the first pulse width laser device
It is identical.
Therefore, 90 degree of circulators 4 of arranging movable polarization state on the output light path for polarizing coaxial device 3.When being switched to
During one pulse width laser device, removable 90 degree of circulators 4 of polarization state leave main optical path, not to the polarization of the first pulse width laser device output
Light processing；When being switched to the second pulse width laser device, removable 90 degree of circulators 4 of polarization state are moved into main optical path, by the second arteries and veins
The orthogonal polarized light of wide laser output is transformed to horizontal polarization light.
Based on above-mentioned design, removable 90 degree of circulators 4 of polarization state include 90 degree of circulator driving mechanism and polarization state
Circulator；Driving mechanism is used to drive 90 degree of circulators of polarization state to enter or leave main optical path.90 degree of circulators of polarization state are used for
The polarization state of orthogonal polarized light is converted, transforms it into horizontal polarization light, 90 degree of circulators of polarization state can specifically use half-wave plate
Or 90 degree of rotors are realized.
Circulator driving mechanism is any mechanism for driving 90 degree of circulator movements of polarization state, and the present invention drives circulator
The concrete form of motivation structure is not intended to limit, it is generally the case that circulator driving mechanism can use motor to realize.
In addition, to realize the detection to 90 degree of rotor-positions of polarization state, so as to whether judge 90 degree of circulators of polarization state
On main optical path, limit switch can be also set；Limit switch is arranged near main optical path, when 90 degree of circulators of polarization state into
When entering main optical path, limit switch disconnects；When 90 degree of circulators of polarization state leave main optical path, triggering limit switch conducting.
In the output terminal of main optical path, polarization detector can be also installed, for detecting the polarization of the laser beam finally obtained
State, after laser process of the present invention, the laser beam detected is horizontal state of polarization.
Switch coaxial same polarization laser for pulsewidth provided by the invention, can also be into one to realize automatic control function
Step design controller；Controller respectively with the first pulse width laser device 1, the second pulse width laser device 2, circulator driving mechanism and spacing
Switch is electrically connected.
Based on the above-mentioned coaxial same polarization laser of pulsewidth switching, coaxially exported the present invention also provides a kind of with polarization laser
Method, comprises the following steps：
Step 1, when needing to obtain the coaxial same polarised light of 1 output light of the first pulse width laser device, controller detection polarization
Whether 90 degree of circulators of state are on main optical path, if located in then driving 90 degree of circulators of polarization state leave main optical path, then hold
Row step 2；If be not located at, step 2 is directly performed；
Step 2, controller starts the first pulse width laser device 1, and 1 output level polarised light of the first pulse width laser device is horizontal inclined
The light that shakes it is wholly transmissive by polarizing the 1st horizontal polarizer 3.1 in coaxial device 3 after, into main optical path, it is horizontal thus to obtain the 1st
Polarization state laser beam；
Step 3, when needing to obtain the coaxial same polarised light of 2 output light of the second pulse width laser device, controller detection polarization
Whether 90 degree of circulators of state are on the main optical path, if located in then direct execution step 4；If be not located at, polarization state is driven
90 degree of circulators enter main optical path, then perform step 4；
Step 4, controller starts the second pulse width laser device 2, and the second pulse width laser device 2 output orthogonal polarized light is vertical inclined
Shake after reflex of the light by the 2nd horizontal polarizer 3.2, reflex to the 1st horizontal polarizer 3.1；Pass through the 1st horizontal polarization again
After the reflex of piece 3.1,90 degree of circulators of polarization state are incided, orthogonal polarized light is converted to water by 90 degree of circulators of polarization state
Flat polarised light, obtains the 2nd horizontal state of polarization laser beam；2nd horizontal state of polarization laser beam and the 1st horizontal state of polarization laser light
Beam is coaxially with the laser beam of polarization state.
Pulsewidth provided by the invention switching coaxially with polarization laser and coaxially with polarization laser output method have with
Lower advantage：
Coaxial same polarization laser is switched by pulsewidth, it is changeable to make the first pulse width laser device and the second pulse width laser device defeated
Go out coaxially with polarization state laser, therefore, the laser beam of distinct pulse widths laser output can share same set of laser amplifier and
Test system with same test parameter, reduces the cost of follow up amplifier and test application system and cumbersome degree.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also should
Depending on protection scope of the present invention.
Claims (8)
- A kind of 1. coaxial same polarization laser of pulsewidth switching, it is characterised in that including：First pulse width laser device (1), the second pulsewidth Laser (2), polarization 90 degree of circulators (4) of coaxial device (3) and removable polarization state；First pulse width laser device (1) the output level polarised light, the second pulse width laser device (2) export orthogonal polarized light； On the output light path of the first pulse width laser device (1) and the output light path of the second pulse width laser device (2) described in arrangement Coaxial device (3) is polarized, 90 degree of circulators (4) of arranging movable polarization state on the output light path of the coaxial device (3) of polarization.
- 2. a kind of coaxial same polarization laser of pulsewidth switching according to claim 1, it is characterised in that the polarization is coaxial Device (3) includes the 1st horizontal polarizer (3.1) and the 2nd horizontal polarizer (3.2)；On the output light path of the first pulse width laser device (1), the 1st horizontal polarizer is set by Brewster angle (3.1), make the horizontal polarization light of the first pulse width laser device (1) output wholly transmissive by the 1st horizontal polarizer (3.1), into main optical path；On the output light path of the second pulse width laser device (2), the 2nd horizontal polarizer is set by Brewster angle (3.2), the orthogonal polarized light of the second pulse width laser device (2) output, passes through the reflection of the 2nd horizontal polarizer (3.2) After effect, the 1st horizontal polarizer (3.1) is reflexed to；Again by the reflex of the 1st horizontal polarizer (3.1) after, Reflex to the main optical path.
- 3. a kind of coaxial same polarization laser of pulsewidth switching according to claim 1, it is characterised in that described removable inclined 90 degree of circulators (4) of polarization state include 90 degree of circulators of circulator driving mechanism and polarization state；The driving mechanism is used to drive Described 90 degree of circulators of polarization state enter or leave the main optical path.
- A kind of 4. coaxial same polarization laser of pulsewidth switching according to claim 3, it is characterised in that the polarization state 90 It is half-wave plate or 90 degree of rotors to spend circulator.
- 5. a kind of coaxial same polarization laser of pulsewidth switching according to claim 3, it is characterised in that the circulator drives Motivation structure includes motor.
- 6. a kind of coaxial same polarization laser of pulsewidth switching according to claim 3, it is characterised in that described moveable 90 degree of circulators (4) of polarization state further include limit switch；It is described when described 90 degree of circulators of polarization state enter the main optical path Limit switch disconnects；When described 90 degree of circulators of polarization state leave the main optical path, the limit switch conducting is triggered.
- 7. a kind of coaxial same polarization laser of pulsewidth switching according to claim 6, it is characterised in that further include control Device；The controller drives with the first pulse width laser device (1), the second pulse width laser device (2), the circulator respectively Motivation structure and the limit switch are electrically connected.
- 8. a kind of a kind of pulsewidth switching based on described in claim 7 is coaxially the same as the coaxial same polarization laser output of polarization laser Method, it is characterised in that comprise the following steps：Step 1, when needing to obtain the coaxial same polarised light of first pulse width laser device (1) output light, controller detection polarization state Whether 90 degree of circulators are located on main optical path, if located in, then drive described 90 degree of circulators of polarization state to leave the main optical path, Then step 2 is performed；If be not located at, step 2 is directly performed；Step 2, controller starts the first pulse width laser device (1), and first pulse width laser device (1) output level polarised light is horizontal inclined The light that shakes it is wholly transmissive by polarizing the 1st horizontal polarizer (3.1) in coaxial device (3) after, into main optical path, thus obtain the 1st Horizontal state of polarization laser beam；Step 3, when needing to obtain the coaxial same polarised light of second pulse width laser device (2) output light, controller detection polarization state Whether 90 degree of circulators are on main optical path, if located in then direct execution step 4；If be not located at, the polarization is driven 90 degree of circulators of state enter the main optical path, then perform step 4；Step 4, controller starts the second pulse width laser device (2), and the second pulse width laser device (2) output orthogonal polarized light is vertical inclined Shake after reflex of the light by the 2nd horizontal polarizer (3.2), reflex to the 1st horizontal polarizer (3.1)；It is horizontal by the 1st again After the reflex of polarizer (3.1), 90 degree of circulators of polarization state are incided, 90 degree of circulators of polarization state turn orthogonal polarized light Horizontal polarization light is changed to, obtains the 2nd horizontal state of polarization laser beam；The 2nd horizontal state of polarization laser beam and the 1st level are partially Polarization state laser beam is coaxially with the laser beam of polarization state.
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