CN205303938U - Saturable absorbent device that optic fibre mode -locking laser used - Google Patents
Saturable absorbent device that optic fibre mode -locking laser used Download PDFInfo
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- CN205303938U CN205303938U CN201520905880.7U CN201520905880U CN205303938U CN 205303938 U CN205303938 U CN 205303938U CN 201520905880 U CN201520905880 U CN 201520905880U CN 205303938 U CN205303938 U CN 205303938U
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- optical fiber
- saturable absorber
- mica
- locked laser
- optic fibre
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Abstract
The utility model relates to a saturable absorbent device that optic fibre mode -locking laser used, including first, the optical fiber head of optic fibre no. 2, ring flange and mica substrate, optic fibre is first to pass through ring flange fixed connection with optical fiber head no. 2, the mica substrate is fixed at the first and optical fiber head of optic fibre between two, be fixed with the saturable absorbent layer of at least one deck on the mica substrate. The utility model provides a present saturable absorbent device damage threshold than lower, exchange the technical problem a little less than the modulation capability who loses, the utility model provides an optic fibre mode -locking laser be the saturable absorbent device of substrate for the mica, can resist the highlight to harm and can reach higher modulation capability again.
Description
Technical field
This utility model belongs to optical field, relates to the method for designing of a kind of saturable absorber device with high laser damage threshold.
Background technology
High-energy ultrashort pulse optical fiber mode locked laser is all with a wide range of applications in fields such as communication, national defense construction and Precision Machining. The absorbent material kind that can be used for realizing passive mode-locking is a lot, such as CNT, Graphene, topological insulator etc. It is generally adopted absorbent material, with high molecular polymer compound, the methods such as field contacts that die, these materials is made saturable absorber device.
In absorbent material with polymer composite material method, it is generally adopted the absorbers such as high molecular polymer and CNT and is mixed and made into thin film. The unsaturation loss of the saturable absorber device that this method makes is typically in more than 20%, and modulation depth can reach more than 10%. But due to polythene material easy Aging Damage under the photothermy of light laser, cause that the damage threshold of the saturable absorber device that this method makes is generally relatively low (< 100MW/cm).
Die in ripple locked mode method, be generally adopted tapered fiber or the mode of side throwing optical fiber, by the effect of the field that dies, the damage threshold of absorber devices is greatly improved, but this method destroys the complete structure of optical fiber, considerably increase the cost of manufacture of absorber, also reduce the mechanical performance of device. Further, since die in field, only fractional transmission light interacts with absorbent material, and absorber devices is relatively weak to the modulation capability of transmission light, the saturated absorption (modulation depth) experimentally obtained at present general < 10%. Therefore, design a kind of can the damage of anti-high light can reach again the saturable absorber device of higher modulation ability in order to realize low startup in optical fiber laser seed source, the mode-locked laser operating of narrow spaces become a scientific research difficult problem. Having a kind of solution is find a kind of existing good light transmission to bear again the material substrate as saturable absorber material of high intensity laser beam.
Summary of the invention
The technical problem relatively low, the modulation capability of transmission light is weak in order to solve existing saturable absorber device damage threshold ratio, this utility model provides a kind of optical fiber mode locked laser in order to the saturable absorber device that Muscovitum is substrate, the damage of anti-high light can reach again higher modulation ability.
Technical solution of the present utility model:
A kind of saturable absorber device of optical fiber mode locked laser, its be characterized in that include that optical fiber is first, optical fiber head two, ring flange and mica substrate, described optical fiber is first to be connected by ring flange is fixing with optical fiber head two, described mica substrate is fixed on that optical fiber is first and between optical fiber head two, described mica substrate is fixed with least one layer of saturable absorber layer.
Sent out by vapour deposition, vapor phase epitaxial growth or saturable absorber layer is fixed in mica substrate by cracking process.
The material of above-mentioned saturable absorber layer is CNT, Graphene, topological insulator or WS2��
The material of above-mentioned mica substrate is Fluororystal mica, and chemical formula is KMg3(AlSi3O10)F2, the transmitance of 0.5-2 mu m waveband light wave is reached 85% by Fluororystal mica.
The thickness of above-mentioned mica substrate is between 20��100 ��m.
Above-mentioned saturable absorber layer is 1-10 layer, and integral thickness is less than 50nm.
Upper described optical fiber is first for optical fiber ceramic head.
This utility model have the advantage that:
1, this utility model by replacing high molecular polymer to do the substrate of saturable absorber material by mica sheet, is reduced within 20% by the insertion loss of saturable absorber device.
2, this utility model adopts mica substrate, and Muscovitum self light transmission is good, it is possible to is dissociated into the thin slice of tens microns, and has certain toughness, it is not easy to breaks, and inserts in optical fiber and does not result in the discrete of Laser Transmission.
3, this utility model saturable absorber device is heat-resist, it is greatly improved damage threshold, the current situation also not finding its irreversible damage of appearance experimentally, and then improve the output of mode-locked laser, enhance the long-time stability of pulse laser.
Accompanying drawing explanation
Fig. 1 is the structural representation of the saturable absorber device of this utility model optical fiber mode locked laser;
Fig. 2 is the mica substrate preparation flow schematic diagram that the present invention is previously mentioned;
Fig. 3 is the schematic flow sheet that cracking process provided by the present invention makes the saturable absorber device being substrate with mica sheet;
Fig. 4 is the device schematic diagram utilizing the saturable absorber device of the present invention to carry out optical fiber laser locked mode experiment.
Detailed description of the invention
The structure of the saturable absorber device being illustrated in figure 1 this utility model optical fiber mode locked laser is shown, including mica substrate 16, be fixed in mica substrate 16 least one layer of saturable absorber layer, optical fiber first 171 for fixing mica substrate and optical fiber head 2 172, mica substrate be attached to optical fiber first on, optical fiber head 2 172 is connected by ring flange 18 first with optical fiber 171.
Muscovitum selects Fluororystal mica, and its chemical formula is KMg3(AlSi3O10)F2, the transmitance of 0.5-2 mu m waveband light wave is reached 85% by it, can be used in realizing pulse output as locked mode element in optical fiber laser in 1��2 mu m waveband. Between optional 20��100 ��m of the thickness of mica sheet.
Saturable absorber material selects CNT, Graphene, topological insulator, WS2��
Saturable absorber material is produced on mica sheet.
The number of plies of saturable absorber material is 1-10 layer, and thickness is less than 50nm.
Referring to Fig. 2, the preparation of mica substrate: first Muscovitum 1 is allocated the mica sheet 2 to required thickness (20-200 ��m), then it is done cleaning process. Mica sheet 2 is immersed in deionized water 3 by the first step, with ultrasonic cleaning instrument 4 to it ultrasonic 20 minutes, removes surface dirt; Mica sheet 2 after ultrasonic is placed in the mixed solution 5 of dioxysulfate water and soaks one hour, remove its surface oil stain by second step; Mica sheet 2 is put in deionized water 3 and is soaked ten minutes by the 3rd step, removes its surface acidity liquid; Mica sheet 2 surface liquid is dried up by the 4th step nitrogen chamber 6.
Fix this saturable absorber material method on mica sheet and have vapour deposition, vapor phase epitaxial growth and cracking process.Here WS is grown with cracking process2For embodiment, referring to Fig. 3: the first step is by (the NH of 0.1g4)2WS4Powder 7 is dissolved in the dimethyl sulfoxide ((CH of 10ml3)2SO) in solution 8; Second step ultrasonic cleaning instrument 4, by ultrasonic 30 minutes of the solution 10 that obtains, so contributes to slightly oarse-grained dissolving; Ready mica sheet 2 is placed on equal glue machine 10 by the 3rd step, and sol evenning machine 10 operates with the speed of 2000r/min, by (NH4)2WS4Solution 9 is coated in mica sheet 2 substrate uniformly and forms one layer of uniform thin film, had (NH4)2WS4The mica sheet 11 of thin film; 4th step heats 20min with 120 DEG C by being placed on heating platform 12 with the mica sheet 11 of thin film, makes thin film be combined with mica sheet tightr; Tube furnace 13 is evacuated to 10 by the 5th step-3Pa, closes molecular pump, passes into gas Ar/H with the speed of 80/20sccm214, raise in-furnace temperature to 600 DEG C with the speed of 10 DEG C/min simultaneously, constant temperature one hour afterwards, can obtain having WS2The mica sheet 16 of 15 materials; 6th step will with WS2After the mica sheet 16 of material is attached on ceramic optical fibre head 17 after being cut to suitable dimension, by ring flange 18, it is connected to form a saturable absorber device 19 with another ceramic optical fibre head 17.
Referring to Fig. 4, in the saturable absorber device 19 incoming fiber optic laser resonant cavity of above-mentioned making, will include for pulse mode-locked embodiment: saturable absorber device 19, Polarization Controller 20, gain fibre 21, pumping 22, wavelength division multiplexer 23, band filter 24, coupling beam divider 25 and isolator 26.
Claims (7)
1. the saturable absorber device of an optical fiber mode locked laser, it is characterized in that: include that optical fiber is first, optical fiber head two, ring flange and mica substrate, described optical fiber is first to be connected by ring flange is fixing with optical fiber head two, described mica substrate is fixed on that optical fiber is first and between optical fiber head two, described mica substrate is fixed with least one layer of saturable absorber layer.
2. the saturable absorber device of optical fiber mode locked laser according to claim 1, it is characterised in that: sent out by vapour deposition, vapor phase epitaxial growth or saturable absorber layer is fixed in mica substrate by cracking process.
3. the saturable absorber device according to arbitrary described optical fiber mode locked laser of claim 1-2, it is characterised in that: the material of described saturable absorber layer is CNT, Graphene, topological insulator or WS2��
4. the saturable absorber device of optical fiber mode locked laser according to claim 3, it is characterised in that: the material of described mica substrate is Fluororystal mica, and chemical formula is KMg3(AlSi3O10)F2, the transmitance of 0.5-2 mu m waveband light wave is reached 85% by Fluororystal mica.
5. the saturable absorber device of optical fiber mode locked laser according to claim 4, it is characterised in that: the thickness of described mica substrate is between 20��100 ��m.
6. the saturable absorber device of optical fiber mode locked laser according to claim 5, it is characterised in that: described saturable absorber layer is 1-10 layer, and integral thickness is less than 50nm.
7. the saturable absorber device of optical fiber mode locked laser according to claim 6, it is characterised in that: described optical fiber is first for optical fiber ceramic head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520905880.7U CN205303938U (en) | 2015-11-13 | 2015-11-13 | Saturable absorbent device that optic fibre mode -locking laser used |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520905880.7U CN205303938U (en) | 2015-11-13 | 2015-11-13 | Saturable absorbent device that optic fibre mode -locking laser used |
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| CN205303938U true CN205303938U (en) | 2016-06-08 |
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| CN201520905880.7U Expired - Fee Related CN205303938U (en) | 2015-11-13 | 2015-11-13 | Saturable absorbent device that optic fibre mode -locking laser used |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106684676A (en) * | 2016-12-07 | 2017-05-17 | 山东师范大学 | Saturable absorber device based on WS2 and preparation method and application of saturable absorber device |
| CN106936065A (en) * | 2017-04-27 | 2017-07-07 | 西安石油大学 | Carboxylated graphene oxide saturable absorber device and preparation method thereof and its application in optical fiber laser |
| CN111525374A (en) * | 2020-04-28 | 2020-08-11 | 中国人民解放军国防科技大学 | Broadband wavelength-adjustable laser pulse signal generating device and fiber laser |
-
2015
- 2015-11-13 CN CN201520905880.7U patent/CN205303938U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106684676A (en) * | 2016-12-07 | 2017-05-17 | 山东师范大学 | Saturable absorber device based on WS2 and preparation method and application of saturable absorber device |
| CN106936065A (en) * | 2017-04-27 | 2017-07-07 | 西安石油大学 | Carboxylated graphene oxide saturable absorber device and preparation method thereof and its application in optical fiber laser |
| CN111525374A (en) * | 2020-04-28 | 2020-08-11 | 中国人民解放军国防科技大学 | Broadband wavelength-adjustable laser pulse signal generating device and fiber laser |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160608 Termination date: 20161113 |
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| CF01 | Termination of patent right due to non-payment of annual fee |