CN101483308A - Precise tunable multiple wavelength annular optical fiber laser - Google Patents
Precise tunable multiple wavelength annular optical fiber laser Download PDFInfo
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- CN101483308A CN101483308A CNA2009101149046A CN200910114904A CN101483308A CN 101483308 A CN101483308 A CN 101483308A CN A2009101149046 A CNA2009101149046 A CN A2009101149046A CN 200910114904 A CN200910114904 A CN 200910114904A CN 101483308 A CN101483308 A CN 101483308A
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Abstract
The present invention discloses a precise tunable multi-wavelength ring optical fiber laser structure. A ring laser cavity includes Er-doped fiber that is taken as gain medium; a 980nm/1550nm wavelength-division multiplexer is used to couple pumping laser of 980nm into the Er-doped fiber; a polarization relevant isolator with tail optical fiber on two ends guaranties the laser work in one way, meanwhile plays the role of a polarizer; two polarization controllers respectively on two side of the polarization relevant isolator are used to control polarization state, a 10dB coupler with 10% of the terminal port used to output optical signal and 90% of the optical signal stays in the cavity for cycle. A segment of long single mode fiber is inserted in the laser cavity and used to increase nonlinear effect inside the laser cavity; a piece of polarization maintaining optical fiber and a polarization relevant isolator constitute a birefraction optical fiber periodicity filter; the on-line birefraction optical fiber filter simplifies structure of the optical fiber laser, makes the optical fiber laser be more easily integrated, and allow the multi- wavelength optical fiber laser with precise tenability.
Description
The technology neighborhood
The present invention relates to optical communication and fiber laser field, a kind of precise tunable multiple wavelength annular optical fiber laser particularly is provided.
Background technology
Multi-wavelength optical fiber laser is a LASER Light Source that the class cost is low, efficient is high, having very big application potential at the aspects such as chromatic dispersion test such as optical WDM communication system, Fibre Optical Sensor, optical device performance test and material, is that the another kind except that mode locked fiber laser causes the fiber laser that people greatly pay close attention in recent years.Er-doped fiber is immersed in suppresses its HOMOGENEOUS BROADENING mechanism in the liquid nitrogen (77K) and can realize Multiwavelength Erbium-doped Fiber Laser, but this method there is very big limitation, can not work at room temperature.So far having proposed several different methods makes fiber laser can at room temperature produce stable multi-wavelength: feed back the single-mode oscillation that stops laser by frequency displacement, utilize four-wave mixing effect in the nonlinear optical fiber to produce the multi-wavelength of self-stabilization, to have the semiconductor laser of non-homogeneous gain characteristic or raman amplifier is inserted in the fiber laser and adopts the stimulated Brillouin scattering of cascade to realize Brillouin's Multiwavelength Erbium-doped Fiber Laser.
Since 1988 multi-wavelength optical fiber laser is studied in the world, and realized first that by the N.Park of the U.S. etc. based on the Er-doped fiber laser output of 6 wavelength of single gain medium, the wavelength interval is 4.8nm in 1992.Afterwards, emerged in large numbers number of research projects like the mushrooms after rain, constantly promoted the understanding of multi-wavelength optical fiber laser mechanism and the improvement of performance in this field.And China takes the lead in beginning to carry out the research work of this aspect from the middle and later periods nineties 20th century by R﹠D institutions such as Nankai University, Beijing University of Post ﹠ Telecommunication, Tsing-Hua University.Through ten years development, especially in recent years, the research of multi-wavelength optical fiber laser aspect has caused widely to be paid close attention to, and has obtained remarkable progress, but the method that adopts mainly concentrates on several known methods.
On the other hand, usually need in laser cavity, insert periodic multiple wavelengths filter in order to realize that multi-wavelength is exported, such as the fixing Fabry-P é rot filter of wavelength, chirped fiber grating or the sampled-grating and the birefringence fiber annular mirror etc. of tunable wave length.Compare the present invention of these conventional filter and propose another simple relatively filter, i.e. birefringent light fiber filter, it is simple in structure, only can be made up of a polarizer and one section high birefringence optical fiber.And its wavelength interval can change by selecting suitable birefringence fiber length, and its wavelength can come fine tune by changing polarization.
But the present invention proposes a kind of fine tune annular optical fiber laser that can at room temperature produce multi-wavelength output based on the nonlinear polarization rotation effect.Laser does not use traditional filter, but inserts one section polarization maintaining optical fibre in laser cavity, and polarization maintaining optical fibre constitutes the fine periodic filter of a birefringent light with the due relevant isolator of polarization with polarizer effect of nonlinear polarization spin fiber laser.The nonlinear polarization rotation effect is a kind of new mechanism that overcomes mode competition in the HOMOGENEOUS BROADENING gain media and method, makes fiber laser at room temperature can produce multi-wavelength output.Be used in the birefringence fiber periodicity comb filter of line style, simplified the structure of laser, it is integrated to make laser be easy to full optical fiber, but fine tune is the perfect light source of following dense wave division multipurpose optical fiber telecommunications system.
Summary of the invention
The object of the present invention is to provide a kind of precise tunable multiple wavelength annular optical fiber laser, have good wavelength selectivity, can be applicable in the division multiplex fibre-optic communication wave system.Comprise in the loop laser chamber that one section Er-doped fiber is as gain media, one 980/1550 wavelength division multiplexer is used for a 980nm pumping laser and is coupled into Er-doped fiber, the relevant isolator of the polarization of a two ends magnetic tape trailer fibre guarantees that the laser folk prescription is to work, also play the effect of a polarizer simultaneously, two Polarization Controllers are used for controlling polarization state in the both sides of the relevant isolator of polarization respectively, also has a 10dB coupler, its 10% port is used to export light signal, and 90% light signal continues to circulate in the chamber.If there have not been other devices, this is a passive mode-locking fiber laser structure of typically rotating based on nonlinear polarization.The multi-wavelength optical fiber laser of the present invention's design has inserted the long monomode fiber of volume and one section polarization maintaining optical fibre in laser chamber, relevant isolator of polarization and polarization maintaining optical fibre constitute a birefringence fiber periodic filter.According to the laser generation theory, a ring laser that has multiple wavelengths filter can have a plurality of wavelength to satisfy oscillating condition and starting of oscillation simultaneously, but because the HOMOGENEOUS BROADENING character of gain media Er-doped fiber, were it not for to introduce between these a plurality of wavelength lasers of other effects and have strong competition, thus very unstable.The basic principle of nonlinear polarization rotation passive mode locking is the relevant saturated absorption of intensity, and promptly LOIHT is absorbed, and high-strength light can pass through.But, the nonlinear polarization rotation effect itself is can be saturated, in other words when light intensity during greater than a certain critical value, the transfer rate of laser cavity is not to increase along with the increase of light intensity, but reduce along with the increase of light intensity, utilize the relevant loss of this intensity to realize stablize the multi-wavelength generation here just.Be different from passive mode-locking fiber laser, now in laser cavity, inserted one section long monomode fiber, be used for increasing nonlinear effect in the laser cavity, also have one section polarization maintaining optical fibre in addition, relevant isolator of polarization and polarization maintaining optical fibre have been formed a periodicity optical fiber filter in line style together.Its wavelength interval is by formula Δ λ=λ
2/ (Δ nL) decision, wherein Δ n and L are respectively the birefringence and the length of polarization maintaining optical fibre.
Compare with the fiber laser that background technology is mentioned, one of characteristics of the present invention and benefit are to have utilized the nonlinear effect of optical fiber to realize multi-wavelength optical fiber laser.The nonlinear polarization rotation effect is a kind of new mechanism that overcomes mode competition in the HOMOGENEOUS BROADENING gain media and method, make fiber laser at room temperature can produce stable multiwavelength laser output, and the optical maser wavelength quantity that produces is many, and representative value is greater than 20.Another characteristics of the present invention and benefit are the birefringence fiber periodicity comb filter that adopts in line style, opened up a kind of novel filter scheme on the one hand, made full use of the original device of laser (polarization be correlated with isolator) on the other hand, only need to insert one section birefringence fiber, but and this filter fine tune, the method is easy and practical.
Description of drawings
Fig. 1 is a structural principle schematic diagram of the present invention.
Among the figure: 1, Er-doped fiber, 2,980nm/1550nm wavelength division multiplexer, 3,980nm pumping laser, 4, the relevant isolator of polarization, 5, first Polarization Controller, 6, second Polarization Controller, 7, polarization maintaining optical fibre, 8, monomode fiber, 9, the 10dB coupler, 10,10% port of 10dB coupler, 11,90% port of 10dB coupler.
The spectrogram that Fig. 2 exports for the multi-wavelength that the present invention records under the spectroanalysis instrument test.
Embodiment
The present invention will be further described below in conjunction with the drawings and specific embodiments.
The present invention has designed a kind of precise tunable multiple wavelength annular optical fiber laser.Its structure as shown in Figure 1.
In the loop laser chamber, comprising: 1, Er-doped fiber, 2, the 980nm/1550nm wavelength division multiplexer, 3, the 980nm pumping laser, 4, the relevant isolator of polarization, 5, first Polarization Controller, 6, second Polarization Controllers, 7, polarization maintaining optical fibre, 8, monomode fiber, 9, the 10dB coupler.Annexation is: 980nm pumping laser (3) links to each other with Er-doped fiber (1) through 980nm/1550nm wavelength division multiplexer (2), the other end of Er-doped fiber (1) is connected to first Polarization Controller (5), relevant with polarization successively isolator (4) again, second Polarization Controller (6), polarization maintaining optical fibre (7), monomode fiber (8), 10dB coupler (9) common port is connected, 90% port (11) of 10dB coupler (9) is connected to the 1550nm end of 980nm/1550nm wavelength division multiplexer (2), and 10% port (10) of 10dB coupler (9) is the output of whole device.
The linearly polarized light that comes out from the relevant isolator (4) of polarization is because the effect of second Polarization Controller (6) becomes elliptically polarized light, the stack of the left and right circularly polarized light that the intensity of elliptically polarized light can regarding as does not wait, the left and right circularly polarized light that does not wait owing to optical kerr effect intensity during by monomode fiber (8) can experience the nonlinear phase shift that does not wait, therefore synthetic polarization state is rotated along with the propagation of light, and the angle of rotation is relevant with luminous intensity.Light arrives the relevant isolator (4) of polarization once more another Polarization Controller (5) before, regulates first Polarization Controller (5) and can change light intensity by the relevant isolator (4) of polarization.So play the effect of an intensity related device by the associating physical efficiency of first Polarization Controller (5), the relevant isolator (4) of polarization, second Polarization Controller (6) and monomode fiber (8) formation.Usually, for the association that a Polarization Controller, the relevant isolator of polarization, Polarization Controller and monomode fiber constitute, there are two different zones in the relation of its transmission and light intensity.First transmission improves with the increase of light intensity, and passive mode-locking fiber laser is operated in this zone exactly.Another one is that the increase of transmitting with light intensity reduces, and promptly high-strength light will experience more lossy, and at this moment association is equivalent to a power equalizer.The relevant non-homogeneous loss of this intensity can be used for overcoming the mode competition in the HOMOGENEOUS BROADENING MEDIUM, makes erbium doped fiber laser at room temperature produce stable multi-wavelength output.Regulate two Polarization Controllers in the laser cavity, choose suitable polarization state, the laser cavity transmission is reduced with the increase of light intensity, suppress chamber internal schema competitive effect, produce under the room temperature and stablize multiwavelength laser output.
The spectrogram of the multiwavelength laser that as shown in Figure 2, to be the present embodiment method record under the spectroanalysis instrument test.Among Fig. 2, by regulating the Polarization Controller in the laser cavity, can produce the wavelength more than 20, the wavelength interval of adjacent wavelength is-0.45nm that just the free spectral limit of birefringence fiber periodic filter is determined by polarization maintaining optical fibre length.Carefully regulate polarization again, multi-wavelength spectrum can be in the free spectral limit of birefringence fiber periodic filter fine tune.
Claims (5)
1, a kind of precise tunable multiple wavelength annular optical fiber laser, it is characterized in that, Er-doped fiber in the loop laser chamber (1) is as gain media, 980nm/1550nm wavelength division multiplexer (2) is coupled into Er-doped fiber to 980nm pumping laser (3), polarization is correlated with isolator (4) assurance laser folk prescription to operation, also play the effect of a polarizer simultaneously, two Polarization Controllers (5,6) be used for controlling polarization state in the both sides of the relevant isolator of polarization respectively, the relevant isolator with polarization of one section polarization maintaining optical fibre (7) (4) constitutes periodically birefringent light fiber filter, one section long monomode fiber (8) is used for increasing nonlinear effect in the laser cavity, 10% port (10) of 10dB coupler (9) is used to export light signal, and the light signal that 90% port (11) comes out continues to circulate in the chamber.
2, a kind of precise tunable multiple wavelength annular optical fiber laser according to claim 1 is characterized in that, comprises the polarization isolator of being correlated with in the fiber laser, and it has the function that has the isolator and the polarizer simultaneously.
3, a kind of precise tunable multiple wavelength annular optical fiber laser according to claim 1, it is characterized in that, inserted one section long monomode fiber in the laser cavity, increased the nonlinear effect in the laser chamber, particularly the relevant non-homogeneous loss of the intensity of inducing of the nonlinear polarization rotation effect in the optical fiber can suppress the mode competition in the HOMOGENEOUS BROADENING gain media effectively, makes fiber laser at room temperature produce stable multi-wavelength output.
4, a kind of precise tunable multiple wavelength annular optical fiber laser according to claim 1, it is characterized in that, inserted one section polarization maintaining optical fibre in the laser cavity, the relevant isolator with polarization of polarization maintaining optical fibre constitutes a birefringence fiber periodic filter, simplified the structure of fiber laser, be easier to integrated.
5, a kind of precise tunable multiple wavelength annular optical fiber laser according to claim 1 is characterized in that, regulates the Polarization Controller in the laser, the multiwavelength laser of output can be in the free spectral limit of periodic filter fine tune.
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Cited By (17)
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| CN102412499A (en) * | 2011-09-22 | 2012-04-11 | 杭州电子科技大学 | Adjustable ring-shaped cavity erbium-doped optical-fiber multi-wavelength laser based on cascade HiBi optical fibers and Sagnac rings |
| CN102437501A (en) * | 2011-12-07 | 2012-05-02 | 北京工业大学 | Mode-locked laser based on doped fiber array |
| CN102610987A (en) * | 2012-02-22 | 2012-07-25 | 上海大学 | Switchable multi-wavelength erbium-doped optical fiber laser based on optical fiber Mach-Zehnder interferometer |
| CN103067092A (en) * | 2012-12-28 | 2013-04-24 | 华为技术有限公司 | Multi-wavelength light source device |
| CN103515836A (en) * | 2013-10-08 | 2014-01-15 | 吉林大学 | Dual-wavelength ring cavity single-frequency fiber laser |
| CN103855598A (en) * | 2014-03-21 | 2014-06-11 | 山东理工大学 | Multiple wavelength convertible tunable fiber laser based on tapered fiber |
| CN106410578A (en) * | 2016-11-15 | 2017-02-15 | 长春理工大学 | 2[mu]m waveband all-fiber dual-wavelength wide-tuning mode-locking laser |
| CN107895881A (en) * | 2017-10-20 | 2018-04-10 | 上海理工大学 | The fine nonlinear polarization rotation mode-locked laser of full polarization |
| CN108493749A (en) * | 2018-04-24 | 2018-09-04 | 南京邮电大学 | A kind of Tunable Multi-wavelength Fiber Laser based on high birefringence micro-nano fiber |
| CN108574195A (en) * | 2018-05-25 | 2018-09-25 | 安徽大学 | A kind of highly doped erbium doped fiber laser of the tunable multi-wavelength of stabilization |
| CN109038188A (en) * | 2018-07-26 | 2018-12-18 | 昆山瞬刻激光科技有限公司 | A kind of erbium doped fiber laser and adjusting method |
| CN109638625A (en) * | 2018-12-20 | 2019-04-16 | 北京航空航天大学 | Multi-wavelength tunable all-fiber pulse laser and system |
| CN109768460A (en) * | 2019-03-11 | 2019-05-17 | 安徽天琢激光科技有限公司 | A kind of single column arrow pattern output pulse optical fiber of ring cavity |
| CN111509537A (en) * | 2020-03-27 | 2020-08-07 | 中国科学院西安光学精密机械研究所 | All-fiber ultrashort pulse mode-locked laser generation method and laser |
| CN112448256A (en) * | 2020-12-01 | 2021-03-05 | 杭州电子科技大学 | Fiber laser capable of simultaneously realizing mode locking and switching single and double wavelengths |
| CN113783092A (en) * | 2021-09-16 | 2021-12-10 | 安徽光智科技有限公司 | Picosecond seed laser based on annular cavity structure |
| CN114039266A (en) * | 2021-11-05 | 2022-02-11 | 重庆两江卫星移动通信有限公司 | Q-switched fiber laser based on all-fiber structure filter |
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2009
- 2009-02-03 CN CNA2009101149046A patent/CN101483308A/en active Pending
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| CN102412499A (en) * | 2011-09-22 | 2012-04-11 | 杭州电子科技大学 | Adjustable ring-shaped cavity erbium-doped optical-fiber multi-wavelength laser based on cascade HiBi optical fibers and Sagnac rings |
| CN102437501A (en) * | 2011-12-07 | 2012-05-02 | 北京工业大学 | Mode-locked laser based on doped fiber array |
| CN102610987A (en) * | 2012-02-22 | 2012-07-25 | 上海大学 | Switchable multi-wavelength erbium-doped optical fiber laser based on optical fiber Mach-Zehnder interferometer |
| WO2014101427A1 (en) * | 2012-12-28 | 2014-07-03 | 华为技术有限公司 | Multi-wavelength light source device |
| JP2015504612A (en) * | 2012-12-28 | 2015-02-12 | ▲ホア▼▲ウェイ▼技術有限公司 | Multi-wavelength light source device |
| CN103067092A (en) * | 2012-12-28 | 2013-04-24 | 华为技术有限公司 | Multi-wavelength light source device |
| CN103515836A (en) * | 2013-10-08 | 2014-01-15 | 吉林大学 | Dual-wavelength ring cavity single-frequency fiber laser |
| CN103515836B (en) * | 2013-10-08 | 2016-01-20 | 吉林大学 | Dual-wavelength annular cavity single frequency optical fiber laser |
| CN103855598A (en) * | 2014-03-21 | 2014-06-11 | 山东理工大学 | Multiple wavelength convertible tunable fiber laser based on tapered fiber |
| CN106410578A (en) * | 2016-11-15 | 2017-02-15 | 长春理工大学 | 2[mu]m waveband all-fiber dual-wavelength wide-tuning mode-locking laser |
| CN106410578B (en) * | 2016-11-15 | 2018-12-28 | 长春理工大学 | 2 mu m waveband all -fiber dual wavelength broad tuning mode-locked lasers |
| CN107895881B (en) * | 2017-10-20 | 2019-08-30 | 上海理工大学 | The nonlinear polarization rotation mode-locked laser of full polarization fibre |
| CN107895881A (en) * | 2017-10-20 | 2018-04-10 | 上海理工大学 | The fine nonlinear polarization rotation mode-locked laser of full polarization |
| CN108493749A (en) * | 2018-04-24 | 2018-09-04 | 南京邮电大学 | A kind of Tunable Multi-wavelength Fiber Laser based on high birefringence micro-nano fiber |
| CN108493749B (en) * | 2018-04-24 | 2023-09-08 | 南京邮电大学 | Tunable multi-wavelength fiber laser based on high-birefringence micro-nano fiber |
| CN108574195A (en) * | 2018-05-25 | 2018-09-25 | 安徽大学 | A kind of highly doped erbium doped fiber laser of the tunable multi-wavelength of stabilization |
| CN109038188A (en) * | 2018-07-26 | 2018-12-18 | 昆山瞬刻激光科技有限公司 | A kind of erbium doped fiber laser and adjusting method |
| CN109038188B (en) * | 2018-07-26 | 2024-04-23 | 昆山瞬刻激光科技有限公司 | Erbium-doped fiber laser and adjusting method |
| CN109638625A (en) * | 2018-12-20 | 2019-04-16 | 北京航空航天大学 | Multi-wavelength tunable all-fiber pulse laser and system |
| CN109768460A (en) * | 2019-03-11 | 2019-05-17 | 安徽天琢激光科技有限公司 | A kind of single column arrow pattern output pulse optical fiber of ring cavity |
| CN111509537A (en) * | 2020-03-27 | 2020-08-07 | 中国科学院西安光学精密机械研究所 | All-fiber ultrashort pulse mode-locked laser generation method and laser |
| CN112448256A (en) * | 2020-12-01 | 2021-03-05 | 杭州电子科技大学 | Fiber laser capable of simultaneously realizing mode locking and switching single and double wavelengths |
| CN112448256B (en) * | 2020-12-01 | 2021-09-07 | 杭州电子科技大学 | Fiber laser capable of simultaneously realizing mode locking and switching single and double wavelengths |
| CN113783092A (en) * | 2021-09-16 | 2021-12-10 | 安徽光智科技有限公司 | Picosecond seed laser based on annular cavity structure |
| CN114039266A (en) * | 2021-11-05 | 2022-02-11 | 重庆两江卫星移动通信有限公司 | Q-switched fiber laser based on all-fiber structure filter |
| CN114039266B (en) * | 2021-11-05 | 2024-03-22 | 重庆两江卫星移动通信有限公司 | Q-switched fiber laser based on all-fiber structure filter |
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