CN203690700U - 1027nm pulse laser - Google Patents
1027nm pulse laser Download PDFInfo
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- CN203690700U CN203690700U CN201320828268.5U CN201320828268U CN203690700U CN 203690700 U CN203690700 U CN 203690700U CN 201320828268 U CN201320828268 U CN 201320828268U CN 203690700 U CN203690700 U CN 203690700U
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- convex lens
- pumping
- photonic crystal
- pulse laser
- dichroic mirror
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- 238000005086 pumping Methods 0.000 claims abstract description 37
- 239000000835 fiber Substances 0.000 claims abstract description 33
- 239000004038 photonic crystal Substances 0.000 claims abstract description 28
- 230000003287 optical effect Effects 0.000 claims abstract description 25
- 239000004065 semiconductor Substances 0.000 claims abstract description 21
- 239000013307 optical fiber Substances 0.000 claims description 15
- 238000005253 cladding Methods 0.000 claims description 8
- 238000010521 absorption reaction Methods 0.000 claims description 6
- 229910052769 Ytterbium Inorganic materials 0.000 claims description 4
- 230000005855 radiation Effects 0.000 claims description 4
- 238000002834 transmittance Methods 0.000 claims description 4
- 230000004907 flux Effects 0.000 claims description 3
- 230000000737 periodic effect Effects 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical compound [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 claims description 2
- 239000006096 absorbing agent Substances 0.000 abstract 2
- 238000005516 engineering process Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
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- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000005311 autocorrelation function Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
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- 230000017525 heat dissipation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000005459 micromachining Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
The utility model discloses a 1027nm pulse laser which comprises a pumping source and a resonant cavity which sequentially comprises a first plano-convex lens, a first dichroscope, a second plano-convex lens, gain photonic crystal fiber, a second dichroscope, a wave-plate set, an optical isolator, a third plano-convex lens, a semiconductor saturable absorber mirror, a half wave-plate and a fourth plano-convex lens. The pumping light generated by the pumping source sequentially coupled by the first plano-convex lens, the first dichroscope and the second plano-convex lens and then enters into gain photonic crystal fiber for pumping. The stimulated radiant light generated is collimated by the second plano-convex lens, reflected by the first dichroscopes, and then sequentially enters into the second dichroscope, the wave-plate set, the optical isolator, the third plano-convex lens and the semiconductor saturable absorber mirror, and after being reflected back to the optical isolator, the stimulated radiant light is irradiated out from an escape window and then sequentially enters into the half wave-plate and the fourth plano-convex lens. The stimulated radiant light is gathered by the fourth plano-convex lens and then enters into the gain photonic crystal fiber. The 1027nm pulse laser is simple in structure, convenient for use, and good in stability.
Description
Technical field
The utility model relates to laser technology field, particularly a kind of 1027nm pulse laser.
Background technology
Passive mode-locking fiber laser is owing to having the advantages such as compact conformation, good heat dissipation effect, good beam quality, become in recent years the focus of research, along with development and the progress of optical fiber technology and mode-locking technique, the performance of the ultrashort pulse that fiber laser produces has reached the level of conventional solid mode-locked laser substantially, has been widely used in the fields such as optical communication, Laser Micro-Machining and optical detection.
In numerous doped fiber pulse lasers, Yb-doped photon crystal optical fiber laser developments is the rapidest.Ytterbium ion has very wide transmitted bandwidth, can support shorter mode locking pulse, and quantum defect is low, not upper conversion and heavy absorption loss; Simultaneously photonic crystal fiber is due to its unique leaded light mechanism, flexible and changeable structure with enrich unique superior function, for new thinking has been opened up in the development of various optical fibre devices and technology.When transmitting in long optical fibers, ultrashort pulse that conventional single mode fiber causes due to little core structure accumulates thereby adopt big mode field area photonic crystal fiber to overcome problem that nonlinear phase shift easily causes that pulse division Limited Pulses energy further improves, realized dispersion and non-linear controlled, double clad structure has improved the coupling efficiency of pumping light simultaneously.And compared with common large mould area double-cladding optical fiber, photonic crystal fiber also can keep single-mode output when core diameter increases, while having avoided locked mode, there is coupling influence quality of mode-locked between high-rder mode and pattern and the problem of stability.Simultaneously photonic crystal fiber has large surface-volume ratio, dispels the heat fabulous, and these superior characteristics make large mould field photon crystal have unique advantage realizing aspect high power locked mode.
Utility model content
In order to solve the problem of prior art, it is simple in structure that the utility model provides one to have, easy to use, and have the 1027nm pulse laser of having stablized.
Described technical scheme is as follows:
A kind of 1027nm pulse laser, comprising: pumping source resonant cavity, and described resonant cavity is annular chamber, it comprises the first planoconvex spotlight successively, the first dichroic mirror, the second planoconvex spotlight, gain photonic crystal fiber, the second dichroic mirror, wave plate group, optical isolator, the 3rd planoconvex spotlight, semiconductor saturable absorbing mirror, / 2nd wave plates and Siping City's convex lens, the pumping light that described pumping source produces is successively through the first described planoconvex spotlight, the first dichroic mirror, after the second planoconvex spotlight is coupled, enter described gain photonic crystal fiber and carry out pumping, the excited radiation light that the photonic crystal fiber that gains described in pumping optical pumping produces enters the second dichroic mirror through the first dichroic mirror reflection after being collimated by described the second planoconvex spotlight, arrives successively described wave plate group through reflection, optical isolator, on the 3rd planoconvex spotlight and semiconductor saturable absorbing mirror, be reflected back after described optical isolator by entering successively 1/2nd described wave plates after an escape window outgoing on it, Siping City's convex lens, are converged and are entered described gain photonic crystal fiber by described Siping City's convex lens.
Described pumping source is the 915nm semiconductor laser with tail optical fiber.
Described gain photonic crystal fiber is for mixing the large mould area double-cladding of ytterbium photonic crystal fiber, and its core diameter is 40 μ m, inner cladding diameter 170 μ m, and there is the airport of hexagon periodic arrangement.
Described wave plate group comprises the quarter-wave plate and 1/2nd wave plates that be arranged in parallel, and described quarter-wave plate is near described optical isolator setting, and 1/2nd described wave plates are near the second described dichroic mirror setting.
On the first described dichroic mirror, be coated with 915nm high transmittance film and 980nm high-reflecting film, for separating of pumping light and obtain 1027nm laser.
The second described dichroic mirror is coated with 915nm high transmittance film and 980nm high-reflecting film,
Near the linear absorption rate of described semiconductor saturable absorbing mirror 1030nm is 65%, and modulation depth is 35%, saturation flux 30 μ J/cm2, and be 500fs recovery time.
The spot size focusing on described semiconductor saturable absorbing mirror is micron dimension.
The beneficial effect that the technical scheme that the utility model provides is brought is:
A. ytterbium ion has two absworption peaks at 915nm and 976nm place, the utility model has used 915nm semiconductor laser as pumping source, it is very wide and steady at 915nm place absorption band, and the factor such as variations in temperature, wave length shift of pumping source is less on the impact of oscillator, does not need accurate temperature controlling.
B. the result of study of having reported is at present mostly the locked mode output that realizes the above wave band of 1030nm, in the utility model, use the optical element of plated film centre wavelength below 1030nm, use the shorter optical fiber of length simultaneously, be conducive to the starting of oscillation of short-wave band laser, finally realize 1027nm optical fiber mode locked laser.
C. the utility model adopts the structure of annular chamber to realize the large mould area double-cladding of 1027nm photonic crystal fiber pulse laser, its advantage is: (1) laser is the mode-locked laser system based on large mode area pcf, less than traditional solid state laser phase specific volume, simple in structure, good stability.(2), owing to adopting large mode area pcf, obtained the pulse output of high repetition frequency high light beam quality.(3) realize the pulse output of Yb dosed optical fiber short-wave band 1027nm, after frequency multiplication, can produce 514nm blue green light, the field such as detection has significant application value under water.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is 1027nm pulse laser structural representation provided by the utility model.
In figure:
1-pumping source; 2-the first planoconvex spotlight; 3-the first dichroic mirror; 4-the second planoconvex spotlight; The 5-photonic crystal fiber that gains; 6-the second dichroic mirror; 7-1/2nd wave plates; 8-quarter-wave plate; 9-optical isolator; 10-the 3rd planoconvex spotlight; 11-semiconductor saturable absorbing mirror; 12-1/2nd wave plates; 13-Siping City convex lens.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing, the utility model execution mode is described in further detail.
As shown in Figure 1, the utility model provides a kind of 1027nm pulse laser, comprising: pumping source resonant cavity, and resonant cavity is annular chamber, it comprises the first planoconvex spotlight successively, the first dichroic mirror, the second planoconvex spotlight, gain photonic crystal fiber, the second dichroic mirror, wave plate group, optical isolator, the 3rd planoconvex spotlight, semiconductor saturable absorbing mirror, / 2nd wave plates and Siping City's convex lens, the pumping light that pumping source produces is successively through the first planoconvex spotlight, the first dichroic mirror, after the second planoconvex spotlight is coupled, enter described gain photonic crystal fiber and carry out pumping, the excited radiation light that pumping optical pumping gain photonic crystal fiber produces enters the second dichroic mirror through the first dichroic mirror reflection after being collimated by described the second planoconvex spotlight, arrives successively wave plate group through reflection, optical isolator, on the 3rd planoconvex spotlight and semiconductor saturable absorbing mirror, after reflected light isolator by entering successively 1/2nd described wave plates after an escape window outgoing on it, Siping City's convex lens, are converged and are entered gain photonic crystal fiber by Siping City's convex lens.
The 915nm semiconductor laser with tail optical fiber is wherein by core diameter 200 μ m, and the tail optical fiber that numerical aperture is 0.22 is exported, and the corresponding 915nm laser of LD maximum current 39A peak power output is 30W.After convex lens group 2,4 collimation focusings that 915nm pumping light is 8mm through two focal lengths, be coupled into double-clad photon crystal optical fibre and carry out pumping.The core diameter of photonic crystal fiber is 40 μ m, and inner cladding diameter 170 μ m have the airport of hexagon periodic arrangement, be 4.5dB/m to the absorption coefficient of 915nm pumping light, length is 1m, and in order to prevent the generation of self-oscillation laser, optical fiber two ends are all polished into 8 degree angles after subsiding.After being collimated by planoconvex spotlight 4 again, the excited radiation light that pumping optical pumping gain fibre produces reflects through dichroic mirror 3, through dichroic mirror, 6 reflections arrive wave plate group again, wherein dichroic mirror 3 objects are to separate pumping light and wish the 1027nm laser obtaining, dichroic mirror 6 objects are further to separate 1027nm laser and 915nm pumping light, and reflected light path looping chamber.1/2nd and the effect of quarter-wave plate group be mainly regulation output ratio, thereby regulate chamber self-energy density, reach the threshold value of locked mode.Light is after wave plate group arrives optical isolator, vertically polarised light output, horizontal polarization light passes through, the effect of converging through planoconvex spotlight 10 focuses on semiconductor saturable absorbing mirror 11, after reflected light isolator, by an escape window outgoing of optical isolator, by 1/2nd wave plates 12, regulate laser polarization state corresponding with optical fiber fast and slow axis, converge and enter gain fibre 5 by planoconvex spotlight 13, form complete resonant cavity and complete gain amplification process, optical isolator has guaranteed that endovenous laser keeps Unidirectional.Near the linear absorption rate of semiconductor saturable absorbing mirror 1030nm is 65%, modulation depth is 35%, saturation flux 30 μ J/cm2, be 500fs recovery time, the spot size focusing on semiconductor saturable absorbing mirror by change obtains the needed power density of startup locked mode.In the time of 915nm semiconductor laser electric current 39A, obtain the stable mode-locking pulse output of power 150mW, repetition rate is up to 93.33MHz, accord with laser chamber appearance, pulse duration is 2.3ps through autocorrelation function analyzer measurement result, and laser center wavelength is 1027nm, and spectral half-width is 1nm.
In the utility model design, use has large mould area double-cladding photonic crystal fiber as gain media, with its excellent characteristic, again parameter and the optical element by well-designed laser oscillator, build multi-functional optical experimental device and obtained 1027nm mode locking pulse Photonic Crystal Fiber Lasers simple in structure, good stability, can establish light source basis for the research in the forward position of laser technology application in the future.
Above-mentioned the utility model embodiment sequence number, just to describing, does not represent the quality of embodiment.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection range of the present utility model.
Claims (8)
1. a 1027nm pulse laser, comprising: pumping source resonant cavity, it is characterized in that, and described resonant cavity is annular chamber, it comprises the first planoconvex spotlight successively, the first dichroic mirror, the second planoconvex spotlight, gain photonic crystal fiber, the second dichroic mirror, wave plate group, optical isolator, the 3rd planoconvex spotlight, semiconductor saturable absorbing mirror, / 2nd wave plates and Siping City's convex lens, the pumping light that described pumping source produces is successively through the first described planoconvex spotlight, the first dichroic mirror, after the second planoconvex spotlight is coupled, enter described gain photonic crystal fiber and carry out pumping, the excited radiation light that the photonic crystal fiber that gains described in pumping optical pumping produces enters the second dichroic mirror through the first dichroic mirror reflection after being collimated by described the second planoconvex spotlight, arrives successively described wave plate group through reflection, optical isolator, on the 3rd planoconvex spotlight and semiconductor saturable absorbing mirror, be reflected back after described optical isolator by entering successively 1/2nd described wave plates after an escape window outgoing on it, Siping City's convex lens, are converged and are entered described gain photonic crystal fiber by described Siping City's convex lens.
2. 1027nm pulse laser according to claim 1, is characterized in that, described pumping source is the 915nm semiconductor laser with tail optical fiber.
3. 1027nm pulse laser according to claim 1, it is characterized in that, described gain photonic crystal fiber is for mixing the large mould area double-cladding of ytterbium photonic crystal fiber, and its core diameter is 40 μ m, inner cladding diameter 170 μ m, and there is the airport of hexagon periodic arrangement.
4. 1027nm pulse laser according to claim 1, it is characterized in that, described wave plate group comprises the quarter-wave plate and 1/2nd wave plates that be arranged in parallel, described quarter-wave plate is near described optical isolator setting, and 1/2nd described wave plates are near the second described dichroic mirror setting.
5. 1027nm pulse laser according to claim 1, is characterized in that, is coated with 915nm high transmittance film and 980nm high-reflecting film on the first described dichroic mirror, for separating of pumping light and obtain 1027nm laser.
6. 1027nm pulse laser according to claim 4, is characterized in that, the second described dichroic mirror is coated with 915nm high transmittance film and 980nm high-reflecting film.
7. 1027nm pulse laser according to claim 1, is characterized in that, near the linear absorption rate of described semiconductor saturable absorbing mirror 1030nm is 65%, and modulation depth is 35%, saturation flux 30 μ J/cm2, and be 500fs recovery time.
8. 1027nm pulse laser according to claim 6, is characterized in that, the spot size focusing on described semiconductor saturable absorbing mirror is micron dimension.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320828268.5U CN203690700U (en) | 2013-12-16 | 2013-12-16 | 1027nm pulse laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320828268.5U CN203690700U (en) | 2013-12-16 | 2013-12-16 | 1027nm pulse laser |
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| Publication Number | Publication Date |
|---|---|
| CN203690700U true CN203690700U (en) | 2014-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320828268.5U Expired - Lifetime CN203690700U (en) | 2013-12-16 | 2013-12-16 | 1027nm pulse laser |
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|---|---|
| CN (1) | CN203690700U (en) |
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2013
- 2013-12-16 CN CN201320828268.5U patent/CN203690700U/en not_active Expired - Lifetime
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140702 |