CN202906187U - A passive mode-locking fiber laser, and a resonant cavity and a rotation angle adjusting device of the passive mode-locking fiber laser - Google Patents
A passive mode-locking fiber laser, and a resonant cavity and a rotation angle adjusting device of the passive mode-locking fiber laser Download PDFInfo
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- CN202906187U CN202906187U CN201220491262.9U CN201220491262U CN202906187U CN 202906187 U CN202906187 U CN 202906187U CN 201220491262 U CN201220491262 U CN 201220491262U CN 202906187 U CN202906187 U CN 202906187U
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Abstract
The utility model is suitable for the technical field of fiber laser design, a passive mode-locking fiber laser is provided, and a resonant cavity and a rotation angle adjusting device of the passive mode-locking fiber laser are also provided. The laser comprises a pumping source and a unidirectional annular resonant cavity, the resonant cavity comprises doped fibers, a first fiber coupling unit, an isolation unit, a wavelength division multiplexing unit, a rotation polarizer filtering partial laser with a second wavelength value and outputting linearly polarized light, a 1/2 rotation wave sheet changing polarization state of laser passing the rotation polarizer, and a 1/4 rotation wave sheet changing polarization state of laser passing the 1/2 rotation wave sheet, and elliptically polarized light is formed. The resonant cavity employs the rotation polarizer, and the 1/2 rotation wave sheet and the 1/4 rotation wave sheet are configured, and mode locking pulse can be formed by adjusting rotation angle of the rotation polarizer, the 1/2 rotation wave sheet and the 1/4 rotation wave sheet, so inner structure of the resonant cavity is simplified, and volume of the resonant cavity is reduced.
Description
Technical field
The utility model belongs to the fiber laser design field, relates in particular to a kind of passive mode-locking fiber laser and resonant cavity thereof, anglec of rotation adjusting device.
Background technology
In recent years, characteristics such as passive mode-locking fiber laser is high with its repetition rate, and efficient is high, and good beam quality is tunable, short pulse and developing rapidly, and in fields such as ultrafast optics, super continuous spectrums generation, communications important application is arranged.
Usually, the locked mode mode of passive mode-locking fiber laser has following a few class: saturable absorber locked mode, non-linear amplification annular chamber locked mode, nonlinear optics annular chamber locked mode and nonlinear polarization rotation locked mode.Because the formation of mode locking pulse is subject to the impact of polarization state in the resonant cavity, thereby various locked mode schemes often all need to be inserted some polarizers and reach the purpose that changes polarization state in the chamber and then form mode locking pulse in resonant cavity, polarizer commonly used has Polarization Controller, the polarizer and wave plate etc.
Fig. 1 shows the typical structure of the passive mode-locking fiber laser that prior art provides, and it comprises: pumping source is used for the pump light that output has the first wave long value; And the unidirectional loop resonant cavity, be used for exporting after pump light with pumping source output converts short-pulse laser to.Resonant cavity wherein specifically comprises: as the doped fiber of gain substance, be used for converting the pump light with first wave long value of pumping source output to Second Wave long value laser; The polarizer is used for the laser filtering to varying strength; Optic fiber coupling unit, the laser coupled that is used for partly having the Second Wave long value enters the polarizer; Polarization Controller utilizes the optical fiber elasto-optical effect to change birefringence in the optical fiber, with the polarization state of the laser of control Optical Fiber Transmission; Isolated location is for the one-way that guarantees the resonant cavity laser transmission; The wavelength division multiplexing unit is used for the pump light with first wave long value of pumping source output and the laser coupled behind isolated location are entered resonant cavity.Wherein, wavelength division multiplexing unit, doped fiber, optic fiber coupling unit, the polarizer, Polarization Controller and isolated location are arranged in turn along the direction of laser transmission in the resonant cavity.
Can find out, in the prior art, because the polarization direction of the polarizer is fixed, can't adjust its polarization direction, therefore need in resonant cavity, insert Polarization Controller or a plurality of wave plate just can obtain mode locking pulse.In resonant cavity, insert under the mode of Polarization Controller, although insertion loss is less, but because Polarization Controller has mainly utilized the stress birfringence of looping of optical fiber, so the bending radius of optical fiber can not be too small, otherwise can cause fracture, thereby caused the volume of Polarization Controller larger, be unfavorable for the miniaturization of product.In resonant cavity, insert under the mode of a plurality of wave plates, often need λ/4, λ/2, the successively combination of λ/4 three wave plate could obtain by adjusting the output of mode locking pulse, so volume is also larger, is unfavorable for the miniaturization of product.
The utility model content
The purpose of this utility model is to provide a kind of passive mode-locking fiber laser, be intended to solve the passive mode-locking fiber laser that prior art provides, because the polarization direction of the polarizer is fixed in the resonant cavity, need to add the larger Polarization Controller of volume or the combination of a plurality of wave plates, cause the larger problem of volume of product.
The utility model is to realize like this, a kind of passive mode-locking fiber laser, comprise pumping source and unidirectional loop resonant cavity, described resonant cavity comprises that the pump light with first wave long value with described pumping source output converts the doped fiber of the laser with Second Wave long value to, the first optic fiber coupling unit, isolated location, the wavelength division multiplexing unit, described resonant cavity also comprises: to the rotation polarizer of polarization light output after the described laser filtering with Second Wave long value of part, change 1/2 rotating wave plate through the polarization state of the laser of the described rotation polarizer, and change polarization state through the laser of described 1/2 rotating wave plate to form 1/4 rotating wave plate of elliptically polarized light;
Described wavelength division multiplexing unit, doped fiber, the first optic fiber coupling unit, the rotation polarizer, 1/2 rotating wave plate, 1/4 rotating wave plate and isolated location are along the direction of laser transmission in described resonant cavity closed loop arrangement in turn.
Further, described laser can also comprise: an anglec of rotation adjusting device, it connects the described rotation polarizer, 1/2 rotating wave plate and 1/4 rotating wave plate, receive the described laser with Second Wave long value of another part, and the laser that has a Second Wave long value when another part is described drives the described rotation polarizer, 1/2 rotating wave plate and the rotation of 1/4 rotating wave plate when being continuous light and the laser that has a Second Wave long value when another part is described stops to drive the described rotation polarizer, 1/2 rotating wave plate and 1/4 rotating wave plate when being mode locking pulse and rotates.
Further, described anglec of rotation adjusting device can comprise:
The first stepping motor that connects the described rotation polarizer;
The second stepping motor that connects described 1/2 rotating wave plate and 1/4 rotating wave plate;
Input optical signal is converted to the first photodetection unit of exporting behind the signal of telecommunication;
Part in the described laser with Second Wave long value of another part is coupled into the second optic fiber coupling unit of described the first photodetection unit input;
Connect described the first photodetection unit output, the waveform that the signal of telecommunication that described the first photodetection unit is exported carries out exporting behind waveform amplification and the Shape correction amplifies and shaping unit;
Control unit, it connects described waveform and amplifies and shaping unit, the first stepping motor and the second stepping motor drive described rotation polarizer rotation by controlling described the first stepping motor when judging that according to the signal of telecommunication that described waveform amplifies and shaping unit is exported the described laser with Second Wave long value of another part is continuous light, and drive the rotation of described 1/2 rotating wave plate and 1/4 rotating wave plate by controlling described the second stepping motor, and when judging that the described laser with Second Wave long value of another part is mode locking pulse, stop to drive the described rotation polarizer by controlling described the first stepping motor, and stop to drive the rotation of described 1/2 rotating wave plate and 1/4 rotating wave plate by controlling described the second stepping motor.
Further, described laser can also comprise:
Place the second photodetection unit on another part transmission path of the described laser with Second Wave long value of another part of described the second optic fiber coupling unit.
Simultaneously, described the first photodetector unit can be a PIN structured light electric explorer; Described control unit can be a single-chip microcomputer.
Another purpose of the present utility model is, a kind of resonant cavity of passive mode-locking fiber laser also is provided, described resonant cavity is the unidirectional loop resonant cavity, comprise that the pump light with first wave long value with described pumping source output converts the doped fiber of the laser with Second Wave long value to, the first optic fiber coupling unit, isolated location, the wavelength division multiplexing unit, described resonant cavity also comprises: to the rotation polarizer of polarization light output after the described laser filtering with Second Wave long value of part, change 1/2 rotating wave plate through the polarization state of the laser of the described rotation polarizer, and change polarization state through the laser of described 1/2 rotating wave plate to form 1/4 rotating wave plate of elliptically polarized light;
Described wavelength division multiplexing unit, doped fiber, the first optic fiber coupling unit, the rotation polarizer, 1/2 rotating wave plate, 1/4 rotating wave plate and isolated location are along the direction of laser transmission in described resonant cavity closed loop arrangement in turn.
Further, the described rotation polarizer, 1/2 rotating wave plate and 1/4 rotating wave plate can all connect an anglec of rotation adjusting device, and described anglec of rotation adjusting device comprises:
The first stepping motor that connects the described rotation polarizer;
The second stepping motor that connects described 1/2 rotating wave plate and 1/4 rotating wave plate;
Input optical signal is converted to the first photodetection unit of exporting behind the signal of telecommunication;
Part in the described laser with Second Wave long value of another part is coupled into the second optic fiber coupling unit of described the first photodetection unit input;
Connect described the first photodetection unit output, the waveform that the signal of telecommunication that described the first photodetection unit is exported carries out exporting behind waveform amplification and the Shape correction amplifies and shaping unit;
Control unit, it connects described waveform and amplifies and shaping unit, the first stepping motor and the second stepping motor drive described rotation polarizer rotation by controlling described the first stepping motor when judging that according to the signal of telecommunication that described waveform amplifies and shaping unit is exported the described laser with Second Wave long value of another part is continuous light, and drive the rotation of described 1/2 rotating wave plate and 1/4 rotating wave plate by controlling described the second stepping motor, and when judging that the described laser with Second Wave long value of another part is mode locking pulse, stop to drive the described rotation polarizer by controlling described the first stepping motor, and stop to drive the rotation of described 1/2 rotating wave plate and 1/4 rotating wave plate by controlling described the second stepping motor.
Further, described the first photodetector unit can be a PIN structured light electric explorer; Described control unit can be a single-chip microcomputer.
Another purpose of the present utility model is, a kind of anglec of rotation adjusting device of passive mode-locking fiber laser also is provided, described anglec of rotation adjusting device connects the rotation polarizer of a unidirectional loop resonant cavity, 1/2 rotating wave plate and 1/4 rotating wave plate, described anglec of rotation adjusting device comprises:
The first stepping motor that connects the described rotation polarizer;
The second stepping motor that connects described 1/2 rotating wave plate and 1/4 rotating wave plate;
Input optical signal is converted to the first photodetection unit of exporting behind the signal of telecommunication;
Part in the described laser with Second Wave long value of another part is coupled into the second optic fiber coupling unit of described the first photodetection unit input;
Connect described the first photodetection unit output, the waveform that the signal of telecommunication that described the first photodetection unit is exported carries out exporting behind waveform amplification and the Shape correction amplifies and shaping unit;
Control unit, it connects described waveform and amplifies and shaping unit, the first stepping motor and the second stepping motor drive described rotation polarizer rotation by controlling described the first stepping motor when judging that according to the signal of telecommunication that described waveform amplifies and shaping unit is exported the described laser with Second Wave long value of another part is continuous light, and drive the rotation of described 1/2 rotating wave plate and 1/4 rotating wave plate by controlling described the second stepping motor, and when judging that the described laser with Second Wave long value of another part is mode locking pulse, stop to drive the described rotation polarizer by controlling described the first stepping motor, and stop to drive the rotation of described 1/2 rotating wave plate and 1/4 rotating wave plate by controlling described the second stepping motor.
Further, described the first photodetector unit can be a PIN structured light electric explorer; Described control unit can be a single-chip microcomputer.
In the utility model, the resonant cavity of passive mode-locking fiber laser has adopted the rotation polarizer, and be combined with 1/2 rotating wave plate and 1/4 rotating wave plate, by adjusting the rotation polarizer, the anglec of rotation of 1/2 rotating wave plate and 1/4 rotating wave plate, can form mode locking pulse, thereby simplify the internal structure of resonant cavity, reduce the volume of resonant cavity.
Description of drawings
Fig. 1 is the structure chart of the passive mode-locking fiber laser that provides of prior art;
Fig. 2 is the structure chart of the passive mode-locking fiber laser that provides of embodiment of the utility model;
Fig. 3 is the structure chart of the passive mode-locking fiber laser that provides of another embodiment of the utility model;
Fig. 4 is the structure chart of anglec of rotation adjusting device among Fig. 3.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
The larger problem of volume that the passive mode-locking fiber laser that provides for prior art exists, in the utility model, the resonant cavity of passive mode-locking fiber laser has adopted the rotation polarizer, and 1/2 rotating wave plate that is used and 1/4 rotating wave plate.
Fig. 2 shows the structure of the passive mode-locking fiber laser that embodiment of the utility model provides, and for convenience of explanation, only shows the part relevant with this embodiment of the utility model.
Among embodiment of the utility model, passive mode-locking fiber laser comprises: pumping source 11 is used for the pump light that output has the first wave long value; And unidirectional loop resonant cavity 12, be used for exporting after pump light with pumping source 11 outputs converts short-pulse laser to.Resonant cavity 12 wherein specifically comprises: as the doped fiber 127 of gain substance, be used for converting the pump light with first wave long value of pumping source 11 outputs to Second Wave long value laser; The rotation polarizer 123; The first optic fiber coupling unit 122, the laser coupled that is used for will part having the Second Wave long value enters to rotate the polarizer 123, and is had polarization light output after the laser filtering of Second Wave long value by 123 pairs of these parts of the rotation polarizer; 1/2 rotating wave plate 124 is used for changing the polarization state through the laser of the rotation polarizer 123; 1/4 rotating wave plate 125 be used for to change polarization state through the laser of 1/2 rotating wave plate 124 to form elliptically polarized light; Isolated location 126 is for the one-way that guarantees resonant cavity 12 laser transmission; Wavelength division multiplexing unit 121 is used for the pump light with first wave long value of pumping source 11 outputs and the laser coupled behind isolated location 126 are entered resonant cavity 12.
Wherein, wavelength division multiplexing unit 121, doped fiber 127, the first optic fiber coupling unit 122, the rotation polarizer 123,1/2 rotating wave plate 124,1/4 rotating wave plate 125 and isolated location 126 are along the direction (that is: direction shown in the empty arrow among Fig. 1) of laser transmission in the resonant cavity 12 closed loop arrangement in turn.
In the utility model, it is that a power is the 980nm semiconductor laser of 500mW that pumping source 11 can be not limited to; It is one 980/1550 wavelength division multiplexers that wavelength division multiplexing unit 121 can be not limited to; It is the long doped fiber of a 20m that doped fiber 127 can be not limited to, and the absorption coefficient of this doped fiber at the 975nm place is 7dB/m; It is the coupler of a 10:90 that the first optic fiber coupling unit 122 can be not limited to; It is that an isolation is 30dB and isolator polarization irrelevant that isolated location 126 can be not limited to.
In the utility model, the resonant cavity 12 of passive mode-locking fiber laser has adopted the rotation polarizer 123, and be combined with 1/2 rotating wave plate 124 and 1/4 rotating wave plate 125, by adjusting the rotation polarizer 123, the anglec of rotation of 1/2 rotating wave plate 124 and 1/4 rotating wave plate 125, can form mode locking pulse, thereby simplify the internal structure of resonant cavity 12, reduce the volume of resonant cavity 12.
The operation principle of the passive mode-locking fiber laser that this embodiment of the utility model provides is as follows: be coupled into laser that the part of the rotation polarizer 123 has a Second Wave long value by the rotation polarizer 123 rear formation linearly polarized lights, form elliptically polarized lights through 1/4 rotating wave plate 125 again; In Optical Fiber Transmission subsequently, because non-linear rotation effect, the peak value of short pulse has the different anglecs of rotation with the both wings of pulse, through for a long time accumulation, when peak value and the both wings anglec of rotation differ 90 °, the angle of reasonably adjusting 1/2 rotating wave plate 124 makes peak value of pulse see through the both wings that rotate the polarizer 123 and stop pulse fully, and can form this moment stablizes level and smooth mode locking pulse, and through 122 outputs of the first optic fiber coupling unit.
In order further to realize the rotation polarizer 123, the automatic adjusting of the anglec of rotation of 1/2 rotating wave plate 124 and 1/4 rotating wave plate 125, the another kind of passive mode-locking fiber laser of the utility model, show the structure of the passive mode-locking fiber laser that another embodiment of the utility model provides such as Fig. 3, for convenience of explanation, only show the part relevant with this embodiment of the utility model.
From shown in Figure 2 different, the passive mode-locking fiber laser that another embodiment of the utility model provides is on basis shown in Figure 2, increased by one with the rotation polarizer 123, the anglec of rotation adjusting device 13 that 1/2 rotating wave plate 124 and 1/4 rotating wave plate 125 connect, the another part that is used for 122 outputs of reception the first optic fiber coupling unit has the laser of Second Wave long value, and the laser that has a Second Wave long value when this another part driven rotary polarizer 123 when being continuous light, 1/2 rotating wave plate 124 and 125 rotations of 1/4 rotating wave plate, and the laser that has a Second Wave long value when this another part stops the driven rotary polarizer 123 when being mode locking pulse, 1/2 rotating wave plate 124 and 125 rotations of 1/4 rotating wave plate, after this passive mode-locking fiber laser rests under the locked mode operating state, and the mode locking pulse of stable output, thereby realized the rotation polarizer 123, the automatic rotation regulatory function of 1/2 rotating wave plate 124 and 1/4 rotating wave plate 125, convenient for users to use.
Fig. 4 shows the structure of anglec of rotation adjusting device 13 among Fig. 3.
Particularly, anglec of rotation adjusting device 13 comprises: the first stepping motor 135 that connects the rotation polarizer 123; The second stepping motor 136 that connects 1/2 rotating wave plate 124 and 1/4 rotating wave plate 125; Input optical signal is converted to the first photodetection unit 132 of exporting behind the signal of telecommunication; Another part of the first optic fiber coupling unit 122 output is had a part in the laser of Second Wave long value and be coupled into the second optic fiber coupling unit 131 of the first photodetection unit 132 inputs; Connect the first photodetection unit 132 outputs, the waveform that the signal of telecommunication that the first photodetection unit 132 is exported carries out exporting behind waveform amplification and the Shape correction amplifies and shaping unit 133; Connecting waveform amplifies and shaping unit 133, the first stepping motor 135 and the second stepping motor 136 amplify and the driven rotary polarizer 123 rotations by control the first stepping motor 135 when judging that laser that another part of the first optic fiber coupling unit 122 outputs has a Second Wave long value is continuous light of the signal of telecommunication of shaping unit 133 outputs according to waveform, and drive 1/2 rotating wave plate 124 and the rotation of 1/4 rotating wave plate 125 by controlling the second stepping motor 136, and the laser that has a Second Wave long value when another part of judging 122 outputs of the first optic fiber coupling unit stops the driven rotary polarizer 123 by controlling the first stepping motor 135 when being mode locking pulse, and stop to drive the control unit 134 of 1/2 rotating wave plate 124 and 125 rotations of 1/4 rotating wave plate by controlling the second stepping motor 136.
In addition, the passive mode-locking fiber laser that this embodiment of the utility model provides can also comprise: place another part through the second optic fiber coupling unit 131 to have the second photodetection unit 14 on another part transmission path of laser of Second Wave long value; The second optic fiber coupling unit 131 also is used for another part that another part with 122 outputs of the first optic fiber coupling unit has the laser of Second Wave long value and is coupled into one second photodetection unit.
Certainly, the rotation polarizer 123,1/2 rotating wave plate 124 and 1/4 rotating wave plate 125 also can be controlled by same stepping motor, perhaps rotate the polarizer 123,1/2 rotating wave plate 124 and 1/4 rotating wave plate 125 and adopt respectively different stepping motors to control, or adopt the control mode of other combination.
In the utility model, it is a PIN structured light electric explorer that the first photodetector unit 132 can be not limited to; It is that a model is the photodetector of NEWPORT 818BB-31 that the second photodetection unit can be not limited to; It is a single-chip microcomputer that control unit 134 can be not limited to.
The utility model also provides a kind of resonant cavity of passive mode-locking fiber laser, and its structure does not repeat them here as shown in Figures 2 and 3.
The utility model also provides a kind of anglec of rotation adjusting device of passive mode-locking fiber laser, and its structure does not repeat them here as shown in Figures 3 and 4.
In the utility model, the resonant cavity 12 of passive mode-locking fiber laser has adopted the rotation polarizer 123, and be combined with 1/2 rotating wave plate 124 and 1/4 rotating wave plate 125, by adjusting the rotation polarizer 123, the anglec of rotation of 1/2 rotating wave plate 124 and 1/4 rotating wave plate 125, can form mode locking pulse, thereby simplify the internal structure of resonant cavity 12, reduce the volume of resonant cavity 12.And further, passive mode-locking fiber laser of the present utility model can also comprise anglec of rotation adjusting device 13, it is that continuous light or mode locking pulse are judged by the laser with Second Wave long value to 122 outputs of the first optic fiber coupling unit, and according to the judged result control rotation polarizer 123, whether the rotation of 1/2 rotating wave plate 124 and 1/4 rotating wave plate 125, thereby realized the rotation polarizer 123, the automatic rotation regulatory function of 1/2 rotating wave plate 124 and 1/4 rotating wave plate 125, convenient for users to use.
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of within spirit of the present utility model and principle, doing, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (10)
1. passive mode-locking fiber laser, comprise pumping source and unidirectional loop resonant cavity, described resonant cavity comprises that the pump light with first wave long value with described pumping source output converts the doped fiber of the laser with Second Wave long value to, the first optic fiber coupling unit, isolated location, the wavelength division multiplexing unit, it is characterized in that, described resonant cavity also comprises: to the rotation polarizer of polarization light output after the described laser filtering with Second Wave long value of part, change 1/2 rotating wave plate through the polarization state of the laser of the described rotation polarizer, and change polarization state through the laser of described 1/2 rotating wave plate to form 1/4 rotating wave plate of elliptically polarized light;
Described wavelength division multiplexing unit, doped fiber, the first optic fiber coupling unit, the rotation polarizer, 1/2 rotating wave plate, 1/4 rotating wave plate and isolated location are along the direction of laser transmission in described resonant cavity closed loop arrangement in turn.
2. passive mode-locking fiber laser as claimed in claim 1, it is characterized in that, described laser also comprises: an anglec of rotation adjusting device, it connects the described rotation polarizer, 1/2 rotating wave plate and 1/4 rotating wave plate, receive the described laser with Second Wave long value of another part, and the laser that has a Second Wave long value when another part is described drives the described rotation polarizer when being continuous light, 1/2 rotating wave plate and the rotation of 1/4 rotating wave plate, and the laser that has a Second Wave long value when another part is described stops to drive the described rotation polarizer when being mode locking pulse, 1/2 rotating wave plate and the rotation of 1/4 rotating wave plate.
3. passive mode-locking fiber laser as claimed in claim 2 is characterized in that, described anglec of rotation adjusting device comprises:
The first stepping motor that connects the described rotation polarizer;
The second stepping motor that connects described 1/2 rotating wave plate and 1/4 rotating wave plate;
Input optical signal is converted to the first photodetection unit of exporting behind the signal of telecommunication;
Part in the described laser with Second Wave long value of another part is coupled into the second optic fiber coupling unit of described the first photodetection unit input;
Connect described the first photodetection unit output, the waveform that the signal of telecommunication that described the first photodetection unit is exported carries out exporting behind waveform amplification and the Shape correction amplifies and shaping unit;
Control unit, it connects described waveform and amplifies and shaping unit, the first stepping motor and the second stepping motor drive described rotation polarizer rotation by controlling described the first stepping motor when judging that according to the signal of telecommunication that described waveform amplifies and shaping unit is exported the described laser with Second Wave long value of another part is continuous light, and drive the rotation of described 1/2 rotating wave plate and 1/4 rotating wave plate by controlling described the second stepping motor, and when judging that the described laser with Second Wave long value of another part is mode locking pulse, stop to drive the described rotation polarizer by controlling described the first stepping motor, and stop to drive the rotation of described 1/2 rotating wave plate and 1/4 rotating wave plate by controlling described the second stepping motor.
4. passive mode-locking fiber laser as claimed in claim 3 is characterized in that, described laser also comprises:
Place the second photodetection unit on another part transmission path of the described laser with Second Wave long value of another part of described the second optic fiber coupling unit.
5. passive mode-locking fiber laser as claimed in claim 3 is characterized in that, described the first photodetector unit is a PIN structured light electric explorer; Described control unit is a single-chip microcomputer.
6. the resonant cavity of a passive mode-locking fiber laser, described resonant cavity is the unidirectional loop resonant cavity, comprise that the pump light with first wave long value with described pumping source output converts the doped fiber of the laser with Second Wave long value to, the first optic fiber coupling unit, isolated location, the wavelength division multiplexing unit, it is characterized in that, described resonant cavity also comprises: to the rotation polarizer of polarization light output after the described laser filtering with Second Wave long value of part, change 1/2 rotating wave plate through the polarization state of the laser of the described rotation polarizer, and change polarization state through the laser of described 1/2 rotating wave plate to form 1/4 rotating wave plate of elliptically polarized light;
Described wavelength division multiplexing unit, doped fiber, the first optic fiber coupling unit, the rotation polarizer, 1/2 rotating wave plate, 1/4 rotating wave plate and isolated location are along the direction of laser transmission in described resonant cavity closed loop arrangement in turn.
7. the resonant cavity of passive mode-locking fiber laser as claimed in claim 6 is characterized in that, the described rotation polarizer, and 1/2 rotating wave plate and 1/4 rotating wave plate all connect an anglec of rotation adjusting device, and described anglec of rotation adjusting device comprises:
The first stepping motor that connects the described rotation polarizer;
The second stepping motor that connects described 1/2 rotating wave plate and 1/4 rotating wave plate;
Input optical signal is converted to the first photodetection unit of exporting behind the signal of telecommunication;
Part in the described laser with Second Wave long value of another part is coupled into the second optic fiber coupling unit of described the first photodetection unit input;
Connect described the first photodetection unit output, the waveform that the signal of telecommunication that described the first photodetection unit is exported carries out exporting behind waveform amplification and the Shape correction amplifies and shaping unit;
Control unit, it connects described waveform and amplifies and shaping unit, the first stepping motor and the second stepping motor drive described rotation polarizer rotation by controlling described the first stepping motor when judging that according to the signal of telecommunication that described waveform amplifies and shaping unit is exported the described laser with Second Wave long value of another part is continuous light, and drive the rotation of described 1/2 rotating wave plate and 1/4 rotating wave plate by controlling described the second stepping motor, and when judging that the described laser with Second Wave long value of another part is mode locking pulse, stop to drive the described rotation polarizer by controlling described the first stepping motor, and stop to drive the rotation of described 1/2 rotating wave plate and 1/4 rotating wave plate by controlling described the second stepping motor.
8. the resonant cavity of passive mode-locking fiber laser as claimed in claim 7 is characterized in that, described the first photodetector unit is a PIN structured light electric explorer; Described control unit is a single-chip microcomputer.
9. the anglec of rotation adjusting device of a passive mode-locking fiber laser, it is characterized in that, described anglec of rotation adjusting device connects the rotation polarizer of a unidirectional loop resonant cavity, 1/2 rotating wave plate and 1/4 rotating wave plate, and described anglec of rotation adjusting device comprises:
The first stepping motor that connects the described rotation polarizer;
The second stepping motor that connects described 1/2 rotating wave plate and 1/4 rotating wave plate;
Input optical signal is converted to the first photodetection unit of exporting behind the signal of telecommunication;
Part in the described laser with Second Wave long value of another part is coupled into the second optic fiber coupling unit of described the first photodetection unit input;
Connect described the first photodetection unit output, the waveform that the signal of telecommunication that described the first photodetection unit is exported carries out exporting behind waveform amplification and the Shape correction amplifies and shaping unit;
Control unit, it connects described waveform and amplifies and shaping unit, the first stepping motor and the second stepping motor drive described rotation polarizer rotation by controlling described the first stepping motor when judging that according to the signal of telecommunication that described waveform amplifies and shaping unit is exported the described laser with Second Wave long value of another part is continuous light, and drive the rotation of described 1/2 rotating wave plate and 1/4 rotating wave plate by controlling described the second stepping motor, and when judging that the described laser with Second Wave long value of another part is mode locking pulse, stop to drive the described rotation polarizer by controlling described the first stepping motor, and stop to drive the rotation of described 1/2 rotating wave plate and 1/4 rotating wave plate by controlling described the second stepping motor.
10. the anglec of rotation adjusting device of passive mode-locking fiber laser as claimed in claim 9 is characterized in that, described the first photodetector unit is a PIN structured light electric explorer; Described control unit is a single-chip microcomputer.
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| CN201220491262.9U CN202906187U (en) | 2012-04-28 | 2012-09-25 | A passive mode-locking fiber laser, and a resonant cavity and a rotation angle adjusting device of the passive mode-locking fiber laser |
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| CN201220191991.2 | 2012-04-28 | ||
| CN201220191991 | 2012-04-28 | ||
| CN201220491262.9U CN202906187U (en) | 2012-04-28 | 2012-09-25 | A passive mode-locking fiber laser, and a resonant cavity and a rotation angle adjusting device of the passive mode-locking fiber laser |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109309338A (en) * | 2018-12-13 | 2019-02-05 | 华南理工大学 | The tunable mode-locked optical fiber laser of Gao Zhongying and laser generation method and application |
| CN109361144A (en) * | 2018-12-13 | 2019-02-19 | 华南理工大学 | The tunable mode-locked optical fiber laser of Gao Zhongying and laser generation method and application |
| CN113363795A (en) * | 2021-06-01 | 2021-09-07 | 中国电子科技集团公司第四十一研究所 | Nonlinear polarization rotation mode-locking fiber laser |
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2012
- 2012-09-25 CN CN201220491262.9U patent/CN202906187U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109309338A (en) * | 2018-12-13 | 2019-02-05 | 华南理工大学 | The tunable mode-locked optical fiber laser of Gao Zhongying and laser generation method and application |
| CN109361144A (en) * | 2018-12-13 | 2019-02-19 | 华南理工大学 | The tunable mode-locked optical fiber laser of Gao Zhongying and laser generation method and application |
| CN113363795A (en) * | 2021-06-01 | 2021-09-07 | 中国电子科技集团公司第四十一研究所 | Nonlinear polarization rotation mode-locking fiber laser |
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