CN208623096U - A kind of optical fiber laser applied to optical fiber telecommunications system - Google Patents
A kind of optical fiber laser applied to optical fiber telecommunications system Download PDFInfo
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- CN208623096U CN208623096U CN201821261506.8U CN201821261506U CN208623096U CN 208623096 U CN208623096 U CN 208623096U CN 201821261506 U CN201821261506 U CN 201821261506U CN 208623096 U CN208623096 U CN 208623096U
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Abstract
A kind of optical fiber laser applied to optical fiber telecommunications system of the utility model belongs to technical field of photo communication.Its primary structure has the first photo-coupler (1), 1 × N photoswitch (2), optical fiber group (3), 1 × N photo-coupler (4), saturable absorber (5), center wavelength tuning device (6), temperature-control circuit (23) etc..The utility model is by the single mode optical fiber of selection different length, and available a plurality of types of solitons are easy to use, and reproducible, when environmental parameter changes, the utility model has the function of stablizing central wavelength.
Description
Technical field
The utility model belongs to technical field of photo communication, in particular to a kind of optical-fiber laser applied to optical fiber telecommunications system
Device.
Background technique
Optical fiber laser is the important component in optic communication, is a kind of spy using the soliton that optical fiber laser generates
The ultrashort light pulse of different form, its shape, amplitude and speed during propagation all remain unchanged.The characteristics of soliton, determines
It has a wide range of applications in the communications field, first it message capacity it is big: transmission code rate is generally up to 20Gb/s, most
It is high up to 100Gb/s or more, secondly bit error rate is low, strong antijamming capability: soliton remains unchanged in transmission process and light is lonely
The insulating characteristics of son determine that the bit error rate of Propagation of Soliton is significantly less than conventional fiber optic communication, or even can realize that the bit error rate is lower than
The zero defect fiber optic communication of 10-12 can not have to relay station again:, can be by light as long as carrying out gain compensation to fibre loss
Signal transmit undistortedly it is extremely remote, thus eliminate photoelectric conversion, again shaping amplification, check error code, electro-optic conversion, again
The complex processes such as retransmission.It is well known that the soliton central wavelength of soliton generation system output is easy to by environment
The influence of the external conditions such as temperature, in practical applications, most important parameter of the central wavelength as soliton, stability is straight
The quality for determining soliton is connect, when soliton being especially applied to communication, the unstable of central wavelength will influence whether to communicate
Stability etc., and then influence communication quality.
It is that " one kind is mixed application No. is 2014102507203 Chinese patent with the immediate prior art of the utility model
The soliton pulses generator that erbium optical fiber laser is constituted ", the patent are controlled the length of single mode optical fiber by photoswitch, realized
The same device generates the purpose of different type soliton.But the patent is universal as other prior arts for generating soliton
Have the shortcomings that central wavelength is unstable.Therefore, the existing technology for generating soliton also needs further perfect.
Utility model content
In order to which the soliton central wavelength for overcoming existing optical fiber laser to generate leads to center vulnerable to environmental parameter influence
The unstable defect of wavelength, the utility model provide a kind of optical fiber laser of soliton that can generate sufficient center wavelength accuracy,
When environmental condition changes, and the central wavelength of soliton is caused to shift, the utility model inhibits outer using compensation circuit
The influence that boundary's environment generates, and then the central wavelength for the soliton for generating system remains unchanged, to improve in soliton
The long stability of cardiac wave.
The purpose of this utility model is achieved through the following technical solutions:
A kind of optical fiber laser applied to optical fiber telecommunications system, structure have, and the output end of optoisolator 7 passes through er-doped
Optical fiber 8 is connected with the common end of light wavelength division multiplexing 9, the end 980nm of light wavelength division multiplexing 9 and the output end phase of pump light source 10
Even, the end 1550nm of light wavelength division multiplexing 9 is connected with one end of Polarization Controller 11, the other end of Polarization Controller 11 and first
The public input terminal of photo-coupler 1 is connected；70% output end of the first photo-coupler 1 and the public input terminal of 1 × N photoswitch 2
It is connected, N output end of 1 × N photoswitch 2 passes through the different single mode optical fiber of the N item in optical fiber group 3 and 1 × N optical coupling respectively
N number of input terminal of device 4 is connected, and the optical fiber group 3 is made of the different single mode optical fiber of N length, N be 2~8 it is whole
Number, the public output of 1 × N photo-coupler 4 are connected with one end of saturable absorber 5；
It is characterized in that, structure is in addition, the other end of saturable absorber 5 and the input terminal of center wavelength tuning device 6
It is connected, the output end of center wavelength tuning device 6 is connected with the input terminal of optoisolator 7；30% output of the first photo-coupler 1
End be connected with the input terminal of the second photo-coupler 12,30% output end of the second photo-coupler 12 as the utility model most
Output, 70% output end of the second photo-coupler 12 are connected with an input terminal of third photo-coupler 13 eventually, third optical coupling
Another input terminal of device 13 is connected with the input terminal of photoelectric conversion circuit 19, an output end of third photo-coupler 13 and
The input terminal of one faraday rotation mirror 15 is connected, one end phase of another output and the optical fiber being wrapped on piezoelectric ceramics 14
Even, the other end for the optical fiber being wrapped on piezoelectric ceramics 14 is connected with the input terminal of the second faraday rotation mirror 16, photoelectric conversion
The output end of circuit 19 is connected with the input terminal of low-pass filter 20, the output end and phase-comparison circuit 21 of low-pass filter 20
An input terminal be connected, the output end of saw-tooth wave generating circuit 18 is connected with another input terminal of phase-comparison circuit, and also
It is connected with the input terminal of driver circuit for piezoelectric ceramics 17, the control of the output end and piezoelectric ceramics 14 of driver circuit for piezoelectric ceramics 17
End is connected, and the output end of phase-comparison circuit 21 is connected with single-chip microcontroller 22, and single-chip microcontroller 22 and the temperature of temperature-control circuit 23 are set
It sets end to be connected, the current output terminal of temperature-control circuit 23 is connected with the thermoelectric cooler of center wavelength tuning device 6, temperature control
The thermistor input terminal of circuit 23 processed is connected with the thermistor of center wavelength tuning device 6；
The structure of the center wavelength tuning device 6 is, aluminium block 61 lower surface and cooling fin 65 upper surface it
Between accompany thermoelectric cooling module 64；Thermistor 63 and Bragg grating 62 are attached to the upper surface of aluminium block 61；Thermistor 63 and temperature
The thermistor input terminal for spending control circuit 23 is connected；The current output terminal phase of thermoelectric cooling module 64 and temperature-control circuit 23
Even；One end of Bragg grating 62 is connected with the second port of optical circulator 66, centered on the first port of optical circulator 66
The input terminal of wave length tuning device 6 is connected, centered on the third port of optical circulator 66 with the saturable absorber 5
The output end of wave length tuning device 6 is connected with the input terminal of the optoisolator 7.
The preferred 980nm laser source of pump light source 10.
First photo-coupler 1 and the preferred splitting ratio of the second photo-coupler 12 is 1 × 2 photo-coupler of 30:70.
The preferred splitting ratio of third photo-coupler 13 is 2 × 2 photo-couplers of 50:50.
The utility model has the advantages that
1, the utility model introduces the center wavelength tuning device that can actively adjust, when environmental condition changes,
Compensating action can be played to the offset of central wavelength caused by environment, effectively increase the central wavelength of the soliton of system output
Stability.
2, the utility model facilitates by control 1 × N photoswitch and 1 × N photo-coupler and generates a variety of different types of light
Orphan.
Detailed description of the invention:
Fig. 1 is the overall structure block diagram of the utility model.
Fig. 2 is the center wavelength tuning apparatus structure block diagram that the utility model uses.
Specific embodiment
The working principle of the utility model is further illustrated with reference to the accompanying drawing, it should be appreciated that institute in bracket and in attached drawing
The component parameter of mark is the preferred parameter that following embodiment uses, rather than limiting of its scope.
The overall structure of 1 the utility model of embodiment
(series of the model MFOS-1N-9/125-S-1310-3U of OZ-OPTICS company production is complete for 1 × N photoswitch 2
Fiber-optical switch) public input terminal by optical fiber, (Shanghai Han Yu Fibre Optical Communication Technology Co., Ltd is given birth to the first photo-coupler 1
1 × 2 standard single-mode fiber coupler produced, splitting ratio 3: 7) 70% output end is connected, N number of output of 1 × N photoswitch 2
End passes through the different optical fiber and (the vast limited public affairs of space Fibre Optical Communication Technology in Shanghai of 1 × N photo-coupler 4 of the N item in optical fiber group 3 respectively
Take charge of production standard single-mode fiber coupler) N number of input terminal be connected, the optical fiber group 3 be by N item (N be 2~8 it is whole
Number) the different optical fiber of length (the SM1500 type general single mode fiber of FIBERCORE company) composition, 1 × N photo-coupler 4
The one of public output and saturable absorber 5 (German BATOP company SA-1550-25-2ps-FC/PC saturable absorber)
End is connected, and the other end of saturable absorber 5 is connected with the input terminal of center wavelength tuning device 6, center wavelength tuning device
6 output end is connected with the input terminal of optoisolator 7 (THORLABS company IO-H-1064B single mode optoisolator), optical isolation
The light output end of device 7 passes through (the C-Band er-doped light of the high-performance 980nm pumping of Nufern company, U.S. production of Er-doped fiber 8
Fibre, model EDFC-980-HP, 3 meters) with light wavelength division multiplexing 9 (production of Shanghai Han Yu Fibre Optical Communication Technology Co., Ltd
Fused tapered 980/1550nm pump light wave division multiplex coupler) common end be connected, the end 980nm of light wavelength division multiplexing 9
With pump light source 10 (the VENUS series 980nm high power single mode pump light source of Shanghai Ke Naite laser Science and Technology Ltd., type
Number be VLSS-980-B, maximum single-mode output optical power be 1200mW) output end be connected, the 1550nm of light wavelength division multiplexing 9
(the mechanical optical fiber polarisation of tricyclic of Shanghai Han Yu Fibre Optical Communication Technology Co., Ltd production controls with Polarization Controller 11 at end
Device) one end be connected, the other end of Polarization Controller 11 is connected with the public input terminal of 1 × 2 photo-coupler 1, the first optical coupling
12 (1 × 2 standard of Shanghai Han Yu Fibre Optical Communication Technology Co., Ltd production of 30% output end of device 1 and the second photo-coupler
Single-mode optical-fibre coupler, splitting ratio 3: 7) input terminal is connected, and 30% output end of the second photo-coupler 12 is practical as this
Novel final output, 70% output end and (2 × 2 standard single mode optical couplings of third photo-coupler 13 of the second photo-coupler 12
Device, splitting ratio 50:50) an input terminal be connected, another input terminal and photoelectric conversion circuit of third photo-coupler 13
19 input terminal is connected, and (THORLABS company is raw for an output end of third photo-coupler 13 and the first faraday rotation mirror 15
The MFI-1310 of production) input terminal be connected, another output and be wrapped in piezoelectric ceramics 14 (cylindrical piezoelectric ceramics, outer diameter
50mm, internal diameter 40mm, high 50mm) on one end of optical fiber be connected, be wrapped in the other end and the of the optical fiber on piezoelectric ceramics 14
The input terminal of two faraday rotation mirrors 16 (MFI-1310 of THORLABS company production) is connected, the output of photoelectric conversion circuit 19
End is connected with the input terminal of low-pass filter 20, the output end of low-pass filter 20 and an input terminal of phase-comparison circuit 21
It is connected, the output end of saw-tooth wave generating circuit 18 is connected with another input terminal of phase-comparison circuit, also drives with piezoelectric ceramics
The input terminal of dynamic circuit 17 is connected, and the output end of driver circuit for piezoelectric ceramics 17 is connected with the control terminal of piezoelectric ceramics 14, phase
The output end of comparison circuit 21 is connected with single-chip microcontroller 22 (STC89C52), the temperature setting of single-chip microcontroller 22 and temperature-control circuit 23
End is connected, and the current output terminal of temperature-control circuit 23 is connected with the thermoelectric cooler of center wavelength tuning device 6, temperature control
The thermistor input terminal of circuit 23 is connected with the thermistor of center wavelength tuning device 6.
Wherein, the temperature-control circuit 23, driver circuit for piezoelectric ceramics 17, photoelectric conversion circuit 19, low-pass filtering
Device 20, saw-tooth wave generating circuit 18, phase-comparison circuit 21 are the prior art.
2 center wavelength tuning device of embodiment
The structure of the center wavelength tuning device 6 is, aluminium block 61 lower surface and cooling fin 65 upper surface it
Between accompany thermoelectric cooling module 64 (TEC12705)；Thermistor 63 (25 ° of 10k Ω@) and Bragg grating 62 (JH-FGA-A101)
It is attached to the upper surface of aluminium block 61；Thermistor 63 is connected with the thermistor input terminal of temperature-control circuit 22；Thermoelectric cooling module
64 are connected with the current output terminal of temperature-control circuit 22；(THORLABS is public for one end of Bragg grating 62 and optical circulator 66
The products C IR1064 of department) second port be connected, wave length tuning device 6 is defeated centered on the first port of optical circulator 66
Enter end, is connected with the saturable absorber 5, wave length tuning device 6 is defeated centered on the third port of optical circulator 66
Outlet is connected with the input terminal of the optoisolator 7.When the soliton central wavelength of system detection to output changes
When, it can reversely be adjusted by center wavelength tuning device 6, and then stablize the central wavelength of output soliton.
The working principle of 3 the utility model of embodiment
In entire block diagram shown in Fig. 1, by the first photo-coupler 1,1 × N photoswitch 2, optical fiber 3~Polarization Controller of group
11 constitute optical fiber lasers main part -- fundamental resonance chamber, for generating soliton, when pass through 1 × N photoswitch 2 and 1 × N
When photo-coupler 4 selects the optical fiber of different length from optical fiber group 3, resonant cavity can generate different types of soliton, produced
A part of signal of soliton by the second photo-coupler 12 enter by third photo-coupler 13, piezoelectric ceramics 14, piezoelectricity pottery
The Michelson's interferometer that porcelain driving circuit 17, the first faraday rotation mirror 15, the second faraday rotation mirror 16 are constituted is done
It relates to, while saw-tooth wave generating circuit 18 provides a sawtooth wave control signal for Michelson's interferometer, the signal is in interferometer
In influenced by soliton central wavelength, then after photoelectric conversion circuit 19 is converted into electric signal and carries out low-pass filtering, gained
Compared with former sawtooth signal, phase changes signal, is come out the phase difference detection of the two by phase-comparison circuit 21
And it is sent into single-chip microcontroller 22, the central wavelength of phase difference soliton caused by fundamental resonance chamber is determined, when single-chip microcontroller 22
It, can be by temperature-control circuit 23 to central wavelength tune when detecting that central wavelength and preset central wavelength change
The temperature of Bragg grating in humorous device 6 is adjusted, to adversely affect the central wavelength of soliton in fundamental resonance chamber, into
And realize the purpose for stablizing central wavelength, final soliton signal carries out defeated from 30% output end of the second photo-coupler 12
Out.
Claims (4)
1. a kind of optical fiber laser applied to optical fiber telecommunications system, structure have, the output end of optoisolator (7) passes through er-doped
Optical fiber (8) is connected with the common end of light wavelength division multiplexing (9), the end 980nm and pump light source (10) of light wavelength division multiplexing (9)
Output end is connected, and the end 1550nm of light wavelength division multiplexing (9) is connected with one end of Polarization Controller (11), Polarization Controller (11)
The other end and the first photo-coupler (1) public input terminal be connected；70% output end and 1 × N light of first photo-coupler (1)
The public input terminal for switching (2) is connected, and it is different that N number of output end of 1 × N photoswitch (2) passes through the N item in optical fiber group (3) respectively
Single mode optical fiber be connected with N number of input terminal of 1 × N photo-coupler (4), the optical fiber group (3) is the list different by N length
What mode fiber was constituted, N is 2~8 integer, the public output of 1 × N photo-coupler (4) and the one end of saturable absorber (5)
It is connected；
It is characterized in that, structure is in addition, the other end of saturable absorber (5) and the input terminal of center wavelength tuning device (6)
It is connected, the output end of center wavelength tuning device (6) is connected with the input terminal of optoisolator (7)；First photo-coupler (1)
30% output end is connected with the input terminal of the second photo-coupler (12), and 30% output end of the second photo-coupler (12) is as this reality
With novel final output, an input terminal phase of 70% output end and third photo-coupler (13) of the second photo-coupler (12)
Even, another input terminal of third photo-coupler (13) is connected with the input terminal of photoelectric conversion circuit (19), third photo-coupler
(13) a output end is connected with the input terminal of the first faraday rotation mirror (15), and another output is made pottery with piezoelectricity is wrapped in
One end of optical fiber on porcelain (14) is connected, and is wrapped in the other end and the second faraday rotation mirror of the optical fiber on piezoelectric ceramics (14)
(16) input terminal is connected, and the output end of photoelectric conversion circuit (19) is connected with the input terminal of low-pass filter (20), low pass filtered
The output end of wave device (20) is connected with an input terminal of phase-comparison circuit (21), the output end of saw-tooth wave generating circuit (18)
It is connected with another input terminal of phase-comparison circuit, is also connected with the input terminal of driver circuit for piezoelectric ceramics (17), piezoelectricity pottery
The output end of porcelain driving circuit (17) is connected with the control terminal of piezoelectric ceramics (14), the output end and list of phase-comparison circuit (21)
Piece machine (22) is connected, and single-chip microcontroller (22) is connected with the temperature setting end of temperature-control circuit (23), temperature-control circuit (23)
Current output terminal is connected with the thermoelectric cooler of center wavelength tuning device (6), and the thermistor of temperature-control circuit (23) is defeated
Enter end to be connected with the thermistor of center wavelength tuning device (6)；
The structure of the center wavelength tuning device (6) is, in the lower surface of aluminium block (61) and the upper surface of cooling fin (65)
Between accompany thermoelectric cooling module (64)；Thermistor (63) and Bragg grating (62) are attached to the upper surface of aluminium block (61)；Temperature-sensitive
Resistance (63) is connected with the thermistor input terminal of temperature-control circuit (23)；Thermoelectric cooling module (64) and temperature-control circuit
(23) current output terminal is connected；One end of Bragg grating (62) is connected with the second port of optical circulator (66), ring of light shape
The input terminal of wave length tuning device (6) centered on the first port of device (66) is connected with the saturable absorber (5),
The output end of wave length tuning device (6) centered on the third port of optical circulator (66), it is defeated with the optoisolator (7)
Enter end to be connected.
2. a kind of optical fiber laser applied to optical fiber telecommunications system according to claim 1, which is characterized in that described
Pump light source (10) is 980nm laser light source.
3. a kind of optical fiber laser applied to optical fiber telecommunications system according to claim 1, which is characterized in that described
First photo-coupler (1) and the second photo-coupler (12) are 1 × 2 photo-couplers that splitting ratio is 30:70.
4. a kind of any optical fiber laser applied to optical fiber telecommunications system, feature exist according to claim 1~3
In the third photo-coupler (13) is 2 × 2 photo-couplers that splitting ratio is 50:50.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821261506.8U CN208623096U (en) | 2018-08-07 | 2018-08-07 | A kind of optical fiber laser applied to optical fiber telecommunications system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821261506.8U CN208623096U (en) | 2018-08-07 | 2018-08-07 | A kind of optical fiber laser applied to optical fiber telecommunications system |
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| CN208623096U true CN208623096U (en) | 2019-03-19 |
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| CN201821261506.8U Active CN208623096U (en) | 2018-08-07 | 2018-08-07 | A kind of optical fiber laser applied to optical fiber telecommunications system |
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