CN202260110U - Narrow-linewidth tunable multi-wavelength optical fiber laser - Google Patents
Narrow-linewidth tunable multi-wavelength optical fiber laser Download PDFInfo
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- CN202260110U CN202260110U CN2011203747761U CN201120374776U CN202260110U CN 202260110 U CN202260110 U CN 202260110U CN 2011203747761 U CN2011203747761 U CN 2011203747761U CN 201120374776 U CN201120374776 U CN 201120374776U CN 202260110 U CN202260110 U CN 202260110U
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Abstract
The utility model discloses a narrow-linewidth tunable multi-wavelength optical fiber laser, wherein a pumping source is connected with the input end of a first wavelength division multiplexer, the other end of the first wavelength division multiplexer is connected with a first polarization controller, the other end of the first polarization controller is connected with an isolator, the other end of the isolator is connected with a polarization analyzer, the other end of the polarization analyzer is connected with a second polarization controller, the other end of the second polarization controller is connected with the first output end of a second coupler, the second output end of the second coupler is connected with an optical spectrum analyzer, the input end of the second coupler is connected with a programmable differential group delay line, the other end of the programmable differential group delay line is connected with a third polarization controller, the other end of the third polarization controller is connected with the output end of a second wavelength division multiplexer, the input end of the second wavelength division multiplexer is connected with a semiconductor optical amplifier, and the other end of the semiconductor optical amplifier is connected with the output end of the first wavelength division multiplexer. Above devices are connected all through optical fibers.
Description
Technical field
The utility model belongs to fiber laser manufacturing technology field; Be particularly related to a kind of multi-wavelength optical fiber laser that utilizes the deflection nonlinearity effect generation narrow linewidth of semiconductor optical amplifier (being SOA), it utilizes the Polarization-Dependent Gain of SOA to realize that the polarization on a large scale of multiple-wavelength laser is tuning.
Background technology
Along with the development of big Capacity Optical communication network, wavelength-division multiplex technique has acquired widely and has used.Multi-wavelength optical fiber laser has with optical fiber and advantages such as optical fibre device is compatible, noise is low, good beam quality; Not only become the important light source of wavelength-division multiplex system; But also be widely used in technical fields such as light sensing, gloss appearance, optical measurement and microwave photon, caused the extensive concern of industry.
In existing multi-wavelength optical fiber laser technology, Er-doped fiber (EDF) can provide bigger gain, higher saturation power and lower Polarization-Dependent Gain spectrum, is the laser gain medium that generally adopts.But; Er-doped fiber is a kind of HOMOGENEOUS BROADENING gain media, and the HOMOGENEOUS BROADENING live width surpasses 10nm under its room temperature, and this HOMOGENEOUS BROADENING characteristic will cause that cross-gain is saturated; Thereby produce the mode competition effect, cause power output shakiness based on the multiple-wavelength laser of Er-doped fiber.In addition; Adopt sampling optical-fiber grating, hi bi birefringence fiber annular mirror and common F-P etalon etc. as multiple wavelengths filter in addition; But there are phenomenons such as even broadening, cross-gain be saturated; Thereby cause interacting between the multiwavelength laser, make the multiple-wavelength laser can't operate as normal.
SOA has that volume is little, the gain bandwidth broad and can be integrated etc. advantage, in optical fiber telecommunications system, obtained using widely.At present, the report of existing many multiple-wavelength lasers about SOA can produce different wavelengths number and wavelength interval.Adopting SOA fiber annular cavity configuration, is the multiple-wavelength laser of filter with the high birefringence optical fiber environment, has realized the stable output of 17 wavelength of continuously adjustable, and its channel spacing is 100GHz, and its peak work rate variance is less than 6dB, and signal to noise ratio is greater than 25dB.Employing has realized spacing 50GHz with the SOA optical fiber ring laser of Fabry-Perot fibre optic interferometer filtering, the continuous light radiation of 51 wavelength, and power unevenness degree is about 4dB.Inserting channel spacing is the SOA multi-wavelength optical fiber ring laser of the Mach-Zehnder optical fiber interferometer of 100GHz; The continuous light of exportable 24 wavelength; Extinction ratio is greater than 30dB; 22 wavelength in the 17.9nm spectral region wherein, power unevenness degree is merely 1.2dB, and gross output is 5.1dBm.More than the optical maser wavelength that produces based on the SOA multi-wavelength optical fiber laser of report at interval all with near the HOMOGENEOUS BROADENING live width (SOA HOMOGENEOUS BROADENING live width at room temperature is about 0.6nm 1550nm) of SOA at the same order of magnitude.Though also there is report the wavelength interval less than the multiple-wavelength laser of SOA HOMOGENEOUS BROADENING live width; For example utilize and have the fiber grating of three wavelength intervals for the reflection peak of 0.05nm; Realized that three road intensive laser of wavelength interval radiate simultaneously; But the number of wavelengths that this method produces is very limited, and the stability of optical grating reflection spectrum is difficult to guarantee.
Consider that SOA has gain and multiple nonlinear effect simultaneously; The utility model has made full use of the deflection nonlinearity effect (NPR) of SOA, studies and obtained realizing based on SOA the multi-wavelength optical fiber laser of ultra-density wavelength interval (wavelength interval is much smaller than SOA HOMOGENEOUS BROADENING live width at room temperature).
Summary of the invention
Cause deficiencies such as unstable, the untunable or tuning range of output is little to existing multiple-wavelength laser output linewidth broad, mode competition; The utility model provides the deflection nonlinearity effect of a kind of SOA of utilization to realize the multiwavelength laser radiation and has utilized the Polarization-Dependent Gain of SOA to realize the tuning multi-wavelength optical fiber laser of polarization on a large scale of multiwavelength laser; Obtain the output wavelength width, laser signal is stable and advantage such as light-controlled tunable; It also has low cost of manufacture, and is easy to and advantage such as fibre system is integrated.
The utility model is taked following technical scheme: the multi-wavelength optical fiber laser of narrow line width regulatable; Comprise pumping source, two wavelength division multiplexers, semiconductor optical amplifier, three Polarization Controllers, two couplers, optical-fiber type Differential Group Delay line able to programme, polarization analysis appearance, spectroanalysis instrument, isolator; Pumping source links to each other with first coupler through optical fiber; First coupler is connected through optical fiber with the input port of first wavelength division multiplexer again, and another input port of first wavelength division multiplexer links to each other through optical fiber with an end of first Polarization Controller; The other end of first Polarization Controller links to each other through optical fiber with an end of isolator; The other end of isolator links to each other through optical fiber with an end of polarization analysis appearance; The other end of polarization analysis appearance links to each other through optical fiber with an end of second Polarization Controller; The other end of second Polarization Controller links to each other through optical fiber with first output port of second coupler; Second output port of second coupler links to each other through optical fiber with spectroanalysis instrument; The input port of second coupler is connected through optical fiber with Differential Group Delay line able to programme, and the other end of Differential Group Delay line able to programme links to each other through optical fiber with an end of the 3rd Polarization Controller, and the other end of the 3rd Polarization Controller is connected through optical fiber with an output of second wavelength division multiplexer; Second wavelength division multiplexer is connected through optical fiber with an end of semiconductor optical amplifier with input, and the other end of semiconductor optical amplifier links to each other through optical fiber with the output of first wavelength division multiplexer.
Preferably, semiconductor optical amplifier, optical-fiber type Differential Group Delay line able to programme and second Polarization Controller, the 3rd Polarization Controller have constituted Lyot birefringence dressing filter, and the wavelength of this filter and channel spacing all can independently be carried out tuning.
Preferably, second coupler adopts 8: 2 coupler, and the other end of said second Polarization Controller links to each other through optical fiber with 80% output port of second coupler, and the output port of 20% splitting ratio of second coupler links to each other through optical fiber with spectroanalysis instrument.
Preferably, pumping source has two, links to each other with first coupler through optical fiber respectively.
Polarization Controller (11) is used for the light of adjustment input DGDL able to programme (10) and the angle between the DGDL birefringence axis.Polarization Controller (8), polarization analysis appearance (7) are used to monitor and analyze the polarization output state of SOA.Spectroanalysis instrument (14) is used to monitor the output spectrum of filter.
Between Polarization Controller (5) and polarization analysis appearance (7), add an isolator (6), guarantee the light one-way transmission in the annular chamber, promptly utilize isolator (6) to confirm the optical transmission direction of annular chamber.
The Lyot birefringence comb filter that employing is made up of SOA (13), optical-fiber type Differential Group Delay line able to programme (10) and Polarization Controller (8,11) is as multiple wavelengths filter, and the wavelength of this filter and channel spacing all can independently be carried out tuning.Semiconductor optical amplifier (13), optical-fiber type Differential Group Delay line able to programme (10) and Polarization Controller (8,11) have constituted Lyot birefringence dressing filter, and the channel spacing FSR of Lyot birefringence dressing filter can be expressed as:
In the formula, Δ τ is the Differential Group Delay that DGDL produces, and Δ λ is the wavelength interval of filter,
Be the phase difference that SOA nonlinear polarization effect produces, C is the light velocity in the vacuum, λ
0It is the reference wavelength at 1550nm place.Δ λ can regulate through the Differential Group Delay Δ τ of optical-fiber type Differential Group Delay line able to programme (10); The transverse electric (TE) of light signal and the phase difference
between horizontal magnetic (TM) two components can realize that quick and continuous filter wavelength is tuning among the performance number may command SOA of the input pumping light of change SOA (13); Thereby control the phase change between two patterns (TE and TM) of SOA through changing the input pumping light watt level, to realize the SOA light-controlled tunable.
With the semiconductor optical amplifier is gain media, and the 3dB gain bandwidth of SOA generally can reach 50nm, and gain flatness is good, has guaranteed laser multi-wavelength output Time Bandwidth broad, and power fluctuation is less between different wave length.The semiconductor optical amplifier laser cavity is long shorter, need not to add pumping light.
Charge carrier is merely tens to the hundreds of psec recovery time, and much smaller than the ring cavity transit time of hundreds of nanosecond, so the relaxation oscillation of SOA is little, it is effective that super model suppresses, so this fiber laser working stability has bigger development potentiality.
The utility model multi-wavelength optical fiber laser has overcome the deficiency of existing multi-wavelength optical fiber laser, reduces mode competition and problem such as untunable.
The utility model utilizes the deflection nonlinearity effect of semiconductor optical amplifier to realize narrow band filter, and utilizes the Polarization-Dependent Gain of SOA to realize that the polarization on a large scale of multiple-wavelength laser is tuning, realizes the tunable of full light territory.
The convert light good stability that the utility model obtains, wavelength-tunable has high cost performance.
Simple in structure, the low cost of manufacture of the utility model, be easy to fibre system integrated, and through regulating the pumping light power size.
Description of drawings
Fig. 1 is the structural representation of the multi-wavelength optical fiber laser of narrow line width regulatable.
Embodiment
Elaborate below in conjunction with the preferred embodiment of accompanying drawing to the utility model.
Fig. 1 is the structural representation of the multi-wavelength optical fiber laser of narrow line width regulatable.Multi-wavelength optical fiber laser comprises pumping source 1,2, wavelength division multiplexer 4,12, semiconductor optical amplifier (being SOA) 13, Polarization Controller 5,8,11, coupler 3,9, optical-fiber type Differential Group Delay line able to programme 10, polarization analysis appearance 7, spectroanalysis instrument 14, isolator 6; Pumping source 1,2 links to each other with coupler 3 through optical fiber respectively; Coupler 3 is connected through optical fiber with the input port a of wavelength division multiplexer 4 again, and another input port b of wavelength division multiplexer 4 links to each other through optical fiber with an end of Polarization Controller 5; The other end of Polarization Controller 5 links to each other through optical fiber with an end of isolator 6; The other end of isolator 6 links to each other through optical fiber with an end of polarization analysis appearance 7; The other end of polarization analysis appearance 7 links to each other through optical fiber with an end of Polarization Controller 8; The other end of Polarization Controller 8 links to each other through optical fiber with 80% output port of coupler 9; The output port of 20% splitting ratio of coupler 9 and spectroanalysis instrument 14 link to each other through optical fiber; The input port of coupler 9 and Differential Group Delay line able to programme 10 are connected through optical fiber, and the other end of Differential Group Delay line 10 able to programme links to each other through optical fiber with an end of Polarization Controller 11, and the other end of Polarization Controller 11 is connected through optical fiber with an output c of wavelength division multiplexer 12; Wavelength division multiplexer 12 is connected through optical fiber with an end of semiconductor optical amplifier 13 with input, and the other end of semiconductor optical amplifier 13 links to each other through optical fiber with the output of wavelength division multiplexer 4.Through above-mentioned connection, semiconductor optical amplifier 13, coupler 9, Differential Group Delay line able to programme 10, light polarization analyzer 7, Polarization Controller 5,8,11, wavelength division multiplexer 4,12, the relevant isolator 6 of polarization have formed annular chamber.
The pump light that pumping source produces after coupler 3 couplings, by the input port a of the common port incoming wave division multiplexer 4 of coupler 3, an end of the common port input semiconductor optical amplifier 13 through wavelength division multiplexer 4 again.Under the semiconductor optical amplifier effect, produce the nonlinear polarization effect; Process is by two Polarization Controllers and the birefringence dressing filter that optical fiber type Differential Group Delay line able to programme is formed then; The power output size of filter is told 20% entering spectrometer 14 by coupler 9 and is monitored; Tell 80% light and continue in annular chamber, to transmit, export through behind the SOA.
When getting among the SOA, pump light signals amplified by the SOA gain; Linearly polarized light becomes elliptically polarized light through the effect of SOA and Polarization Controller 11; The stack of the left and right circularly polarized light that the intensity of elliptically polarized light can regarding as does not wait, but SOA is different to the gain of TE mould and TM, and it can be along with the variable power of input optical signal; Then experienced the nonlinear phase shift that does not wait through the left and right circularly polarized light behind the SOA; Therefore, synthetic polarization state can be rotated along with the propagation of light, and the angle of rotation is relevant with the input light intensity.Regulate Polarization Controller 8 and can change signal light intensity.The effect of an intensity related device has been played by the association that event is made up of Polarization Controller, semiconductor optical amplifier, Polarization Controller and polarization analysis appearance.Under different pumping light power effects, the phase difference between TE and TM two components changes from 0 to π, thereby to be biased to be a light-operated adjustable wave plate to SOA, and phase difference can accurately be controlled by luminous power.
The utility model fiber laser is realized narrow-band filtering through Lyot birefringence filter, can change channel spacing through the time delay value that changes Differential Group Delay line able to programme, thereby realizes the continuous dynamic-tuning of wavelength interval.
Claims (3)
1. the multi-wavelength optical fiber laser of a narrow line width regulatable; Comprise pumping source, two wavelength division multiplexers, semiconductor optical amplifier, three Polarization Controllers, two couplers, optical-fiber type Differential Group Delay line able to programme, polarization analysis appearance, spectroanalysis instrument, isolator; It is characterized in that: pumping source links to each other with first coupler through optical fiber; First coupler is connected through optical fiber with the input port of first wavelength division multiplexer again, and another input port of first wavelength division multiplexer links to each other through optical fiber with an end of first Polarization Controller; The other end of first Polarization Controller links to each other through optical fiber with an end of isolator; The other end of isolator links to each other through optical fiber with an end of polarization analysis appearance; The other end of polarization analysis appearance links to each other through optical fiber with an end of second Polarization Controller; The other end of second Polarization Controller links to each other through optical fiber with first output port of second coupler; Second output port of second coupler links to each other through optical fiber with spectroanalysis instrument; The input port of second coupler is connected through optical fiber with Differential Group Delay line able to programme, and the other end of Differential Group Delay line able to programme links to each other through optical fiber with an end of the 3rd Polarization Controller, and the other end of the 3rd Polarization Controller is connected through optical fiber with an output of second wavelength division multiplexer; Second wavelength division multiplexer is connected through optical fiber with an end of semiconductor optical amplifier with input, and the other end of semiconductor optical amplifier links to each other through optical fiber with the output of first wavelength division multiplexer.
2. the multi-wavelength optical fiber laser of narrow line width regulatable as claimed in claim 1; It is characterized in that: semiconductor optical amplifier, optical-fiber type Differential Group Delay line able to programme and second Polarization Controller, the 3rd Polarization Controller have constituted Lyot birefringence dressing filter, and the wavelength of this filter and channel spacing all can independently be carried out tuning.
3. the multi-wavelength optical fiber laser of narrow line width regulatable as claimed in claim 1; It is characterized in that: second coupler adopts 8: 2 coupler; The other end of said second Polarization Controller links to each other through optical fiber with 80% output port of second coupler, and the output port of 20% splitting ratio of second coupler links to each other through optical fiber with spectroanalysis instrument.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011203747761U CN202260110U (en) | 2011-09-30 | 2011-09-30 | Narrow-linewidth tunable multi-wavelength optical fiber laser |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011203747761U CN202260110U (en) | 2011-09-30 | 2011-09-30 | Narrow-linewidth tunable multi-wavelength optical fiber laser |
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| CN202260110U true CN202260110U (en) | 2012-05-30 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104393920A (en) * | 2014-11-13 | 2015-03-04 | 李舒琴 | All-optical sampler based on phase-shifted fiber grating fiber loop mirror |
| CN106921440A (en) * | 2015-12-28 | 2017-07-04 | 上海贝尔股份有限公司 | A kind of inexpensive light adjustable transmitter for optical network unit |
| CN110995354A (en) * | 2019-12-19 | 2020-04-10 | 成都优博创通信技术股份有限公司 | Optical assembly and optical module |
| CN113933764A (en) * | 2021-09-30 | 2022-01-14 | 杭州电子科技大学 | Magnetic field sensing system based on ferromagnetic thin film and Fabry-Perot cavity |
| US11901699B2 (en) | 2020-11-20 | 2024-02-13 | Suzhou Institute Of Nano-Tech And Nano-Bionics (Sinano) , Chinese Academy Of Sciences | Narrow linewidth laser |
-
2011
- 2011-09-30 CN CN2011203747761U patent/CN202260110U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104393920A (en) * | 2014-11-13 | 2015-03-04 | 李舒琴 | All-optical sampler based on phase-shifted fiber grating fiber loop mirror |
| CN104393920B (en) * | 2014-11-13 | 2017-01-25 | 李舒琴 | All-optical sampler based on phase-shifted fiber grating fiber loop mirror |
| CN106921440A (en) * | 2015-12-28 | 2017-07-04 | 上海贝尔股份有限公司 | A kind of inexpensive light adjustable transmitter for optical network unit |
| CN110995354A (en) * | 2019-12-19 | 2020-04-10 | 成都优博创通信技术股份有限公司 | Optical assembly and optical module |
| US11901699B2 (en) | 2020-11-20 | 2024-02-13 | Suzhou Institute Of Nano-Tech And Nano-Bionics (Sinano) , Chinese Academy Of Sciences | Narrow linewidth laser |
| CN113933764A (en) * | 2021-09-30 | 2022-01-14 | 杭州电子科技大学 | Magnetic field sensing system based on ferromagnetic thin film and Fabry-Perot cavity |
| CN113933764B (en) * | 2021-09-30 | 2023-09-08 | 杭州电子科技大学 | Magnetic field sensing system based on ferromagnetic thin film and Fabry-Perot cavity |
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| EXPY | Termination of patent right or utility model |