CN108649418A - Can self-starting Spectral Broadening and offset filtering mode-locked laser - Google Patents
Can self-starting Spectral Broadening and offset filtering mode-locked laser Download PDFInfo
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- CN108649418A CN108649418A CN201810652332.6A CN201810652332A CN108649418A CN 108649418 A CN108649418 A CN 108649418A CN 201810652332 A CN201810652332 A CN 201810652332A CN 108649418 A CN108649418 A CN 108649418A
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- 238000001228 spectrum Methods 0.000 claims abstract description 56
- 230000003321 amplification Effects 0.000 claims abstract description 26
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 26
- 239000013307 optical fiber Substances 0.000 claims abstract description 25
- 230000000694 effects Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
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- 230000005540 biological transmission Effects 0.000 description 2
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- 239000006096 absorbing agent Substances 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/11—Mode locking; Q-switching; Other giant-pulse techniques, e.g. cavity dumping
- H01S3/1106—Mode locking
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/08—Construction or shape of optical resonators or components thereof
- H01S3/081—Construction or shape of optical resonators or components thereof comprising three or more reflectors
- H01S3/083—Ring lasers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/106—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity
- H01S3/108—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity using non-linear optical devices, e.g. exhibiting Brillouin or Raman scattering
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- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Lasers (AREA)
Abstract
It is a kind of can self-starting Spectral Broadening and offset filtering mode-locked laser, it includes first filter, second filter and one or two light amplification and spectrum widening device, first filter, a light amplification and spectrum widening device, second filter and another light amplification and spectrum widening device are linked to be annular or first filter, a light amplification and spectrum widening device and second filter by optical fiber and are linked to be line style by optical fiber；The laser further includes two light path switching components and a boot leg.Effect of the present invention：This mode-locked laser is a kind of ultra-short pulse laser generator; it the advantages of comprehensive two kinds traditional mode-locked lasers, can be ensureing it with high power tolerance and good environment stability under the premise of and realize the self-starting of ultrashort pulse laser using the switching of different mode locking mechanism.
Description
Technical field
The invention belongs to laser equipment technical field, more particularly to it is a kind of can self-starting Spectral Broadening and partially
Move filtering mode-locked laser.
Background technology
Since ultra-short pulse laser can provide very high peak power in moment, common laser technology can be completed not
The work that can be completed, therefore at present extensive use has been obtained in fields such as Science Explorations, information, Precision Machining and medical treatment.And it locks
Mode laser is typically the commonly used equipment for generating ultra-short pulse laser.
Traditional mode-locked laser is typically added mode locker to realize in the intracavitary of common lasers, as shown in Figure 1, Figure 2
Shown, laser roundtrip or cycle operation in annular chamber between intracavity reflecting mirror 1 can pass through image intensifer 2 every time
With mode locker 3.
Mode locker is a kind of nonlinear loss device, it has high loss to the light of low-power, and for high-power
Light has low-loss, has the function of that low low-powered optical signals can be cut by high power, in this way in mode-locked laser intracavitary
Laser power fluctuation can constantly amplify under the action of mode locker 3 and form light pulse.
Current mode locker is usually made using saturable absorber made of saturable absorption material, including semiconductor
Saturable absorbing mirror (SESAM) mode locker, carbon nanotube mode locker, graphene mode locker etc..The mode locker of this kind of technology is convenient for
It uses, self-starting easy to implement, but an existing serious problem is that its power tolerance is poor, in long-time peak value work(
The lower meeting aging of rate light pulse effect is burnt.
It is most recently newly a kind of novel mode-locked laser occur to overcome problem above --- Spectral Broadening and partially
Filtering mode-locked laser is moved, structure is as shown in Fig. 3, Fig. 4 and Fig. 5.
This kind of mode-locked laser includes mainly first filter 4, second filter 5 and one or two light amplification and spectrum exhibition
Wide device 6, as shown in fig. 6, the frequency spectrum of first filter 4 and second filter 5 is staggered, i.e. wavelength mismatch does not have frequency spectrum weight
It is folded.When high peak power pulse (centre wavelength is λ 0) transmits in the loop, in light amplification and the (tool of spectrum widening device 6
Have the gain fibre of nonlinear interaction) under the action of generate pulse amplifying and spectrum widening, the degree of spectrum widening depends on defeated
Enter the peak power of pulse, peak power more bloom spectrum widening is wider, and spectrum can enter first filter 4 and second filter
5 transmission range so that partial spectrum can be by first filter 4 and second filter 5, to form access, and can
Laser is constituted in the loop, and since low powder pulsed nonlinear interaction is small, transmission power is low, cannot maintain to transport in the loop
Row, realizes nonlinear loss (the small low-power consumption of high power loss is big), the i.e. function of mode locker, so as to defeated from principle
Go out high power mode locking pulse.Since such mode-locked laser does not use saturable absorption mode locker, thus with power tolerance
The advantages that power is strong, stability, long lifespan.
But since the first filter 4 of the mode-locked laser intracavitary of this structure and the spectrum of second filter 5 are inclined
From it is to disconnect, therefore (there has been no pulses in the initial state that this, which is equivalent to the light path of mode-locked laser under low power scenarios,
When injection) only have spontaneous radiation (ASE) and exists, power far can not reach the level of non-linear spectrum broadening, to can not
Simultaneously by the filter of two mismatches, therefore laser output can not be generated.Only high power seed pulse is injected from the external world
Afterwards, these pulses could keep on the go under the action of Spectral Broadening, can not self-starting limit non-linear spectral exhibition
Wide and offset filtering mode-locked laser practical application.
It can be seen that above-mentioned several mode-locked lasers are in power tolerance, environmental stability and can be in terms of self-starting
With respective advantage and disadvantage.
Invention content
To solve the above-mentioned problems, the purpose of the present invention is to provide it is a kind of can self-starting Spectral Broadening and partially
Move filtering mode-locked laser.
In order to achieve the above object, it is provided by the invention can self-starting Spectral Broadening and offset filtering mode locking swash
Light device is ring cavity structure, including first filter, second filter and two light amplification and spectrum widening device, wherein the first filter
Wave device, a light amplification and spectrum widening device, second filter and another light amplification and spectrum widening device are linked to be by optical fiber
Annular, and first filter and second filter have different frequency spectrums；It is described can self-starting Spectral Broadening
Further include two light path switching components and a boot leg with offset filtering mode-locked laser；It is set on each light path switching component
There are two light path switch；A light path switch groups are installed respectively on two optical fiber being connected with first filter or second filter
Part, a light path switch on light path switching component are connected with first filter or second filter；Boot leg is by passing through light
The third filter and mode locker of fibre connection are constituted, and third filter and mode locker are cut by optical fiber and a light path respectively
Another light path switch changed on component is connected.
The third filter and the second filter or first filter that are not connected with light path switching component have phase
Same frequency spectrum.
It is provided by the invention can self-starting Spectral Broadening and offset filtering mode-locked laser be linear cavity structure,
Including two speculums, first filter, second filter and light amplification and spectrum widening device, one of speculum, first
Filter, light amplification and spectrum widening device, second filter and another speculum are linked to be line style, and successively by optical fiber
One filter and second filter have different frequency spectrums；It is described can self-starting Spectral Broadening and offset filtering lock
Mode laser further includes light path switching component and a boot leg；It is set on light path switching component there are two light path switch, is connected
On the optical fiber between light amplification and spectrum widening device and first filter or second filter, one of light path switch
It is connected with first filter or second filter；Boot leg is made of the third filter and mode locker connected by optical fiber,
And mode locker is connected by optical fiber with another light path switch on light path switching component simultaneously.
The third filter is reflection bandstop filter, and the second filter that is not connected with light path switching component or
First filter frequency spectrum having the same.
It is provided by the invention can self-starting Spectral Broadening and offset filtering mode-locked laser have it is following beneficial
Effect：The advantages of this mode-locked laser is a kind of ultra-short pulse laser generator, comprehensive two kinds of tradition mode-locked laser, using not
Switching with mode locking mechanism can realize ultrashort arteries and veins ensureing it with high power tolerance and good environment stability under the premise of
Rush the self-starting of laser.This mode-locked laser can be operated in traditional mode locker and non-linear broadening and two kinds of offset filtering
Under working condition and seamless switching can be carried out.And two kinds of operating modes share most light paths, so that when starting
Intracavitary number of pulses can control, and avoid uncontrollable using caused intracavitary pulse in the case of seed injection light pulse outside chamber
Disadvantage.
Description of the drawings
Fig. 1 is the mode-locked laser structural schematic diagram of the linear cavity structure of prior art.
Fig. 2 is the mode-locked laser structural schematic diagram of the ring-like cavity configuration of prior art.
Fig. 3 is Spectral Broadening and the offset filtering mode-locked laser structural representation of the ring-like cavity configuration of prior art
Figure.
Fig. 4 is a kind of Spectral Broadening of the linear cavity structure of prior art and offset filtering mode-locked laser structure
Schematic diagram.
Fig. 5 is the Spectral Broadening and offset filtering mode-locked laser knot of the linear cavity structure of another prior art
Structure schematic diagram.
Fig. 6 is the filter and pulse spectrum schematic diagram of Spectral Broadening and offset filtering mode-locked laser.
Fig. 7 be the ring cavity structure that provides of the embodiment of the present invention one can self-starting Spectral Broadening and offset filter
Wave mode-locked laser structural schematic diagram.
Fig. 8 be linear cavity structure provided by Embodiment 2 of the present invention can self-starting Spectral Broadening and offset filter
Wave mode-locked laser structural schematic diagram.
Specific implementation mode
In the following with reference to the drawings and specific embodiments to it is provided by the invention can self-starting Spectral Broadening and offset
Filtering mode-locked laser is described in detail.Component identical with prior art uses identical drawing reference numeral.
Embodiment one
As shown in fig. 7, it is provided in this embodiment can self-starting Spectral Broadening and offset filtering mode-locked laser
For ring cavity structure, including first filter 4, second filter 5 and two light amplification and spectrum widening device 6, wherein the first filter
The 4, light amplification of wave device and spectrum widening device 6, second filter 5 and another light amplification and spectrum widening device 6 pass through optical fiber
It is linked to be annular, and first filter 4 and second filter 5 have different frequency spectrums；It is described can self-starting nonlinear optical
Spectrum widening and offset filtering mode-locked laser further include two light path switching components 7 and a boot leg；Each light path switching
Light path switch there are two being set on component 7；One is installed respectively on two optical fiber being connected with first filter 4 or second filter 5
A light path switching component 7, a light path switch on light path switching component 7 are connected with first filter 4 or second filter 5；
Boot leg is made of the third filter 8 and mode locker 9 connected by optical fiber, and third filter 8 and mode locker 9 are distinguished
It is connected with another light path switch on a light path switching component 7 by optical fiber.
The third filter 8 and the second filter 5 not being connected with light path switching component 7 or first filter 4 tool
There is identical frequency spectrum.
Now by it is provided in this embodiment can self-starting Spectral Broadening and offset filtering mode-locked laser work
Principle is described below：
It is first turned on the light path switch being connected with boot leg on light path switching component 7 when startup, thereby turns on startup branch
Road, conducting with mode locker 9 traditional co-wavelength resonant tank, in the case, with same frequency spectrum first filter 4 or
Second filter 5 works with third filter 8 and mode locker 9, which can be under the action of mode locker 9 voluntarily
Start, intracavitary generate light pulse, it is sufficiently high after pulse power so that can spectrum widening be generated after, utilize light path switching component
7 are switched on another light path switch, disconnect boot leg to protect mode locker 9, thus constitute spectrum widening and offset filtering swashs
Light circuit, in the case, first filter 4 and second filter 5 with different spectral work, in light amplification and spectrum
Stretcher 6 and the lower start-up operation of two first filters 4 and 5 effect of second filter with different spectral, are able to maintain that
Pulse operates and further hoisting power, final output ultra-short pulse laser.
In this way it is provided by the invention can self-starting Spectral Broadening and offset filtering mode-locked laser can structure
At two performance loops：Using Spectral Broadening and offset filtering principle spectrum widening and offset filtering laser circuit and
Start the co-wavelength resonant tank of mode locker with tradition.The two performance loops share the light path and device of the overwhelming majority, tool
There is almost the same chamber long, the circuit light path that the pulse generated in two performance loops is undergone is almost the same.This mode-locked laser
Two performance loops of device can be switched over by the light path switch on light path switching component, can be also also turned on and be worked at the same time,
Thus, it is possible to realize the seamless switching of mode-locked laser working mechanism.
Embodiment two
As shown in figure 8, it is provided in this embodiment can self-starting Spectral Broadening and offset filtering mode-locked laser
For linear cavity structure, including two speculums 1, first filter 4, second filter 5 and light amplification and spectrum widening device 6,
In a speculum 1, first filter 4, light amplification and spectrum widening device 6, second filter 5 and another speculum 1 pass through
Optical fiber is linked to be line style successively, and first filter 4 and second filter 5 have different frequency spectrums；It is described can self-starting
Spectral Broadening and offset filtering mode-locked laser further include light path switching component 7 and a boot leg；Light path switches
It is set on component 7 there are two light path switch, is connected to positioned at light amplification and spectrum widening device 6 and the filtering of first filter 4 or second
On optical fiber between device 5, one of light path switch is connected with first filter 4 or second filter 5；Boot leg is by passing through
The third filter 8 and mode locker 9 of optical fiber connection are constituted, and mode locker 9 is simultaneously by optical fiber and light path switching component 7
Another light path switch is connected.
The third filter 8 is reflection bandstop filter, and the second filter not being connected with light path switching component 7
5 or 4 frequency spectrum having the same of first filter.
Now by it is provided in this embodiment can self-starting Spectral Broadening and offset filtering mode-locked laser work
Principle is described below：
It is first turned on the light path switch being connected with boot leg on light path switching component 7 when startup, thereby turns on startup branch
Road, conducting with mode locker 9 traditional co-wavelength resonant tank, in the case, with same frequency spectrum first filter 4 or
Second filter 5 works with third filter 8 and mode locker 9, which can be under the action of mode locker 9 voluntarily
Start, intracavitary generate light pulse, it is sufficiently high after pulse power so that can spectrum widening be generated after, utilize light path switching component
7 are switched on another light path switch, disconnect boot leg to protect mode locker 9, thus constitute spectrum widening and offset filtering swashs
Light circuit, in the case, first filter 4 and second filter 5 with different spectral work, in light amplification and spectrum
Stretcher 6 and the lower start-up operation of two first filters 4 and 5 effect of second filter with different spectral, are able to maintain that
Pulse operates and further hoisting power, final output ultra-short pulse laser.
Claims (4)
1. it is a kind of can self-starting Spectral Broadening and offset filtering mode-locked laser, it is characterised in that：Described can be certainly
The Spectral Broadening and offset filtering mode-locked laser of startup are ring cavity structure, including first filter (4), the second filter
Wave device (5) and two light amplification and spectrum widening device (6), wherein first filter (4), a light amplification and spectrum widening device
(6), second filter (5) and another light amplification and spectrum widening device (6) are linked to be annular, and first filter by optical fiber
(4) and second filter (5) has different frequency spectrums；It is described can self-starting Spectral Broadening and offset filtering mode locking
Laser further includes two light path switching components (7) and a boot leg；Light there are two being set on each light path switching component (7)
Way switch；A light path switching component is installed respectively on two optical fiber being connected with first filter (4) or second filter (5)
(7), a light path switch on light path switching component (7) is connected with first filter (4) or second filter (5)；Start branch
The third filter (8) and mode locker (9) for being routed through optical fiber connection are constituted, and third filter (8) and mode locker (9) point
It is not connected with another light path switch on a light path switching component (7) by optical fiber.
2. it is according to claim 1 can self-starting Spectral Broadening and offset filtering mode-locked laser, feature
It is：The third filter (8) and the second filter (5) or first filter not being connected with light path switching component (7)
(4) frequency spectrum having the same.
3. it is a kind of can self-starting Spectral Broadening and offset filtering mode-locked laser, it is characterised in that：Described can be certainly
The Spectral Broadening and offset filtering mode-locked laser of startup are linear cavity structure, including two speculums (1), the first filter
Wave device (4), second filter (5) and light amplification and spectrum widening device (6), one of speculum (1), first filter (4),
Light amplification and spectrum widening device (6), second filter (5) and another speculum (1) are linked to be line style successively by optical fiber, and
First filter (4) and second filter (5) have different frequency spectrums；It is described can self-starting Spectral Broadening and partially
It further includes light path switching component (7) and a boot leg to move filtering mode-locked laser；There are two being set on light path switching component (7)
Light path switch is connected between light amplification and spectrum widening device (6) and first filter (4) or second filter (5)
On optical fiber, one of light path switch is connected with first filter (4) or second filter (5)；Boot leg is by passing through optical fiber
The third filter (8) and mode locker (9) of connection are constituted, and mode locker (9) while passing through optical fiber and light path switching component (7)
On another light path switch be connected.
4. it is according to claim 3 can self-starting Spectral Broadening and offset filtering mode-locked laser, feature
It is：The third filter (8) is reflection bandstop filter, and the second filtering not being connected with light path switching component (7)
Device (5) or first filter (4) frequency spectrum having the same.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810652332.6A CN108649418B (en) | 2018-06-22 | 2018-06-22 | Self-starting nonlinear spectrum broadening and offset filtering mode-locked laser |
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| CN201810652332.6A CN108649418B (en) | 2018-06-22 | 2018-06-22 | Self-starting nonlinear spectrum broadening and offset filtering mode-locked laser |
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| CN108649418B CN108649418B (en) | 2024-02-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114389132A (en) * | 2022-01-14 | 2022-04-22 | 中国人民解放军国防科技大学 | Fiber pulse laser oscillator and oscillation starting method |
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| CN108649418B (en) | 2024-02-02 |
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