CN103199419A - Multi-wavelength fiber laser based on carbon nano tube positive dispersion area locked mode - Google Patents
Multi-wavelength fiber laser based on carbon nano tube positive dispersion area locked mode Download PDFInfo
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- CN103199419A CN103199419A CN2013101292727A CN201310129272A CN103199419A CN 103199419 A CN103199419 A CN 103199419A CN 2013101292727 A CN2013101292727 A CN 2013101292727A CN 201310129272 A CN201310129272 A CN 201310129272A CN 103199419 A CN103199419 A CN 103199419A
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Abstract
The invention discloses a multi-wavelength fiber laser based on a carbon nano tube positive dispersion area locked mode. The multi-wavelength fiber laser based on the carbon nano tube positive dispersion area locked mode comprises a wavelength division multiplexer, an erbium-doped fiber, an opto-isolator, a carbon nano tube and a coupler. A ring cavity is formed through single mode fibers. Pump light enters the ring cavity through the wavelength division multiplexer, passes through the erbium-doped fiber, the opto-isolator and the carbon nano tube successively, then enters a fiber Fabry-Perot filter outside the ring cavity through the coupler, and is filtered by the fiber Fabry-Perot filter to output a multi-wavelength laser. The multi-wavelength fiber laser based on the carbon nano tube positive dispersion area locked mode firstly combines frequency spectrum cutting technique of the carbon nano tube (CNT) in the positive dispersion area locked mode and the Fabry-Perot filter. The laser is simple in structure, easy to achieve, and succeeded in achieving output of multiple wavelengths at the same time, wherein a wavelength interval meets the ITU communication standard, and the multiple wavelengths are output smoothly and stably, stability is good, and the multi-wavelength laser can be acted as a light source of DWDM communication.
Description
Technical field
The present invention relates to the communication system light source, field of lasers is specifically related to a kind of multi-wavelength optical fiber laser based on carbon nano-tube positive dispersion district.
Background technology
Fiber laser relies on its special structure and performance, medical treatment, sensing, military affairs, industry, etc. various fields also play an important role, and multi-wavelength optical fiber laser is widely used in fields such as optical information processing, light sensing, spectrum analysis.
In order to improve capability of communication system, people have expected wavelength-division multiplex technique, and in the wavelength division multiplexing most critical be exactly the multiple-wavelength laser light source.Therefore thereby multi-wavelength optical fiber laser becomes the perfect light source in dense wave division multipurpose (DWDM) and the Optical Time Division Multiplexing novel optical communication systems such as (OTDM), has obtained people's close attention.Recently more than ten years get most of the attention and are able to flourishly, and this is mainly owing to it self distinct advantages, as multi-wavelength output, compact conformation, low cost, good beam quality, low insertion loss etc.
At present, the research purpose of multi-wavelength optical fiber laser mainly show as how to obtain to stablize, the wavelength interval is adjustable, the output wavelength number is abundant and the multi-wavelength of each wavelength power equalization swashs and to penetrate.For reaching above requirement, adopt different gain mediums, different comb filter and different cavity resonator structures, the researcher has carried out a lot of researchs both at home and abroad.But most of laser structure complexity, perhaps stability is not enough.
Summary of the invention
Technical problem to be solved by this invention provides a kind of multi-wavelength optical fiber laser of novelty, and is simple in structure, and good stability solves the characteristic of the HOMOGENEOUS BROADENING of Er-doped fiber EDF well, suppresses the mode competition of EDF.
For solving the problems of the technologies described above, the present invention proposes a kind of multi-wavelength optical fiber laser based on carbon nano-tube positive dispersion district locked mode, comprise pump light, wavelength division multiplexer, Er-doped fiber, optical isolator, carbon nano-tube, coupler, fiber Fabry-Perot filters, described wavelength division multiplexer, Er-doped fiber, optical isolator, carbon nano-tube and coupler form ring cavity by monomode fiber, described pump light enters ring cavity by described wavelength division multiplexer, earlier by described Er-doped fiber, optical isolator, carbon nano-tube, enter the outer fiber Fabry-Perot filters of ring cavity by coupler then, export multiwavelength laser after the described fiber Fabry-Perot filters filtering.
As preferably, also comprise Polarization Controller in the described ring cavity, the polarization state of control chamber inner laser.
Further, also comprise dispersion compensating fiber in the described ring cavity, be used for the dispersion compensation of ring cavity inner laser.
Know-why of the present invention is, the rectangle spectrum that has utilized the positive dispersion district locked mode of carbon nano-tube CNT to produce, and the correlation technique of frequency spectrum cutting.Er-doped fiber EDF provides gain in the chamber, and utilizes the good saturated absorption characteristic of CNT, can form mode-locked laser in the chamber, regulates the chromatic dispersion in the chamber simultaneously.Chamber internal dispersion value is by the length of control EDF and monomode fiber SMF, perhaps regulates chromatic dispersion in the chamber by increasing dispersion compensating fiber DCF, make net dispersion in the chamber be in suitable on the occasion of.Suitably regulate Polarization Controller PC, the polarization state of control chamber inner laser, this moment, ring cavity was output as a locked mode output in the positive dispersion district, its spectrum is a rectangle, the top is very smooth, and recycling fiber Fabry-Perot filters FFPF filtering has obtained multi-wavelength and exported simultaneously.
The present invention combines carbon nano-tube CNT first at positive dispersion district locked mode and fabry-perot filter frequency spectrum cutting technique, laser structure is simple, realize easily, output when successfully having realized a plurality of wavelength, the wavelength interval meets the ITU communication standard, and multi-wavelength output flat stable, stability is fine, can be used as the DWDM communication light source.
Description of drawings
Below in conjunction with the drawings and specific embodiments technical scheme of the present invention is further described in detail.
Fig. 1 is multi-wavelength optical fiber laser schematic diagram of the present invention.The pump light 980pump of 1-980nm wherein, 2-wavelength division multiplexer WDM, 3-Er-doped fiber EDF, 4-optical isolator ISO, 5-carbon nano-tube CNT, 6-90:10 coupler OC, 7-fiber Fabry-Perot filters FFPF, 8-Polarization Controller PC, 9-dispersion compensating fiber DCF.
Embodiment
As shown in Figure 1, wavelength division multiplexer 2, Er-doped fiber 3, optical isolator 4, carbon nano-tube 5 and coupler 6 form ring cavity by monomode fiber, and the pump light 1 of 980nm is coupled in the ring cavity by wavelength division multiplexer WDM2, excitation Er-doped fiber EDF3 makes it reach population inversion, has gain function.Optical isolator ISO4 can guarantee that the laser in the ring cavity turns round along a direction, the polarization state of Polarization Controller PC8 control chamber inner laser, the characteristic of regulating output light.Because the dispersion values of EDF is born, the dispersion values of monomode fiber SMF is positive, guarantees that EDF has under certain gain situation, the length of control monomode fiber SMF, make 2nd order chromatic dispersion value in the chamber for just, dispersion compensating fiber DCF9 also can further adjust ring cavity internal dispersion value.Regulate the power of 980nm pumping again to desired value, make CNT realize locked mode in the positive dispersion district, obtain rectangle spectrum.Come out by coupler 6 coupling unit laser, through fiber Fabry-Perot filters 7 filtering, just can obtain multi-wavelength output.
It should be noted last that, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although with reference to preferred embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (3)
1. multi-wavelength optical fiber laser based on carbon nano-tube positive dispersion district locked mode, it is characterized in that, comprise pump light, wavelength division multiplexer, Er-doped fiber, optical isolator, carbon nano-tube, coupler, fiber Fabry-Perot filters, described wavelength division multiplexer, Er-doped fiber, optical isolator, carbon nano-tube and coupler form ring cavity by monomode fiber, described pump light enters ring cavity by described wavelength division multiplexer, earlier by described Er-doped fiber, optical isolator, carbon nano-tube, enter the outer fiber Fabry-Perot filters of ring cavity by coupler then, export multiwavelength laser after the described fiber Fabry-Perot filters filtering.
2. the multi-wavelength optical fiber laser based on carbon nano-tube positive dispersion district locked mode according to claim 1 is characterized in that, also comprises Polarization Controller in the described ring cavity.
3. the multi-wavelength optical fiber laser based on carbon nano-tube positive dispersion district locked mode according to claim 1 and 2 is characterized in that, also comprises dispersion compensating fiber in the described ring cavity.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013101292727A CN103199419A (en) | 2013-04-15 | 2013-04-15 | Multi-wavelength fiber laser based on carbon nano tube positive dispersion area locked mode |
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| CN2013101292727A CN103199419A (en) | 2013-04-15 | 2013-04-15 | Multi-wavelength fiber laser based on carbon nano tube positive dispersion area locked mode |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104048685A (en) * | 2014-07-01 | 2014-09-17 | 华中科技大学 | Quasi-distributed optical fiber sensing system based on spectrum limitation chaos optical signals |
| CN110649452A (en) * | 2019-09-27 | 2020-01-03 | 北京航空航天大学 | High-power wavelength-adjustable all-fiber nanosecond pulse laser and system |
| CN113725704A (en) * | 2020-05-25 | 2021-11-30 | 北京石墨烯研究院 | Saturable absorber and all-fiber mode-locked laser |
Citations (5)
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| US6570893B1 (en) * | 1998-11-25 | 2003-05-27 | Science & Technology Corporation @ Unm | Precisely wavelength-tunable and wavelength-switchable narrow linewidth lasers |
| CN1588151A (en) * | 2004-07-16 | 2005-03-02 | 清华大学 | Multiple wave length simultaneously exciting erbium blended optical fiber laser working and room temperature |
| CN101303507A (en) * | 2006-12-01 | 2008-11-12 | 华中科技大学 | Full optical wavelength converting device based on non-linear optical waveguide |
| CN101557071A (en) * | 2009-05-15 | 2009-10-14 | 哈尔滨工业大学深圳研究生院 | Erbium doped fiber laser with convertible multi-wavelength and mode locking and realization method thereof |
| CN101714738A (en) * | 2008-09-25 | 2010-05-26 | Ofs飞泰尔公司 | Passively modelocked fiber laser using carbon nanotubes |
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2013
- 2013-04-15 CN CN2013101292727A patent/CN103199419A/en active Pending
Patent Citations (5)
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| US6570893B1 (en) * | 1998-11-25 | 2003-05-27 | Science & Technology Corporation @ Unm | Precisely wavelength-tunable and wavelength-switchable narrow linewidth lasers |
| CN1588151A (en) * | 2004-07-16 | 2005-03-02 | 清华大学 | Multiple wave length simultaneously exciting erbium blended optical fiber laser working and room temperature |
| CN101303507A (en) * | 2006-12-01 | 2008-11-12 | 华中科技大学 | Full optical wavelength converting device based on non-linear optical waveguide |
| CN101714738A (en) * | 2008-09-25 | 2010-05-26 | Ofs飞泰尔公司 | Passively modelocked fiber laser using carbon nanotubes |
| CN101557071A (en) * | 2009-05-15 | 2009-10-14 | 哈尔滨工业大学深圳研究生院 | Erbium doped fiber laser with convertible multi-wavelength and mode locking and realization method thereof |
Non-Patent Citations (1)
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| SZE Y. SET等: "Laser mode locking using a saturable absorber incorpoating carbon nanotubes", 《JOURNAL OF LIGHTWAVE TECHNOLOGY》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104048685A (en) * | 2014-07-01 | 2014-09-17 | 华中科技大学 | Quasi-distributed optical fiber sensing system based on spectrum limitation chaos optical signals |
| CN104048685B (en) * | 2014-07-01 | 2017-01-11 | 华中科技大学 | Quasi-distributed optical fiber sensing system based on spectrum limitation chaos optical signals |
| CN110649452A (en) * | 2019-09-27 | 2020-01-03 | 北京航空航天大学 | High-power wavelength-adjustable all-fiber nanosecond pulse laser and system |
| CN113725704A (en) * | 2020-05-25 | 2021-11-30 | 北京石墨烯研究院 | Saturable absorber and all-fiber mode-locked laser |
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Application publication date: 20130710 |