CN108767635A - Niobic acid lithium doping silica fibre Raman optical amplification device - Google Patents
Niobic acid lithium doping silica fibre Raman optical amplification device Download PDFInfo
- Publication number
- CN108767635A CN108767635A CN201810434970.0A CN201810434970A CN108767635A CN 108767635 A CN108767635 A CN 108767635A CN 201810434970 A CN201810434970 A CN 201810434970A CN 108767635 A CN108767635 A CN 108767635A
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- CN
- China
- Prior art keywords
- silica fibre
- acid lithium
- niobic acid
- lithium doping
- optoisolator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
- H01S3/06716—Fibre compositions or doping with active elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/02057—Optical fibres with cladding with or without a coating comprising gratings
- G02B6/02076—Refractive index modulation gratings, e.g. Bragg gratings
- G02B6/02123—Refractive index modulation gratings, e.g. Bragg gratings characterised by the method of manufacture of the grating
- G02B6/02133—Refractive index modulation gratings, e.g. Bragg gratings characterised by the method of manufacture of the grating using beam interference
- G02B6/02138—Refractive index modulation gratings, e.g. Bragg gratings characterised by the method of manufacture of the grating using beam interference based on illuminating a phase mask
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/0675—Resonators including a grating structure, e.g. distributed Bragg reflectors [DBR] or distributed feedback [DFB] fibre lasers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/30—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range using scattering effects, e.g. stimulated Brillouin or Raman effects
- H01S3/302—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range using scattering effects, e.g. stimulated Brillouin or Raman effects in an optical fibre
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Manufacturing & Machinery (AREA)
- General Physics & Mathematics (AREA)
- Lasers (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
The present invention relates to a kind of niobic acid lithium doping silica fibre Raman amplifiction devices, it includes signal source, optoisolator first, fiber bragg grating, niobic acid lithium doping silica fibre, wavelength-division multiplex coupling, the parts such as high power pump laser, optoisolator second and light power meter.Device each section is connected by silica fibre, and the niobic acid lithium doping silica fibre is prepared by Modified Chemical vapour deposition process, and preparation process is simple, and finished product fibre loss is low, and Raman gain coefficienct is high.Fiber bragg grating is inscribed on niobic acid lithium doping silica fibre, and the junction loss caused by external grating is eliminated.High power pump laser provides the required pump light of amplifying device, and with signal light stimulated raman scattering occurs in a fiber for pump light to amplified signal light.The configuration of the present invention is simple, safety and stability, amplification effect are good, it can be achieved that batch production.
Description
Technical field
The present invention relates to a kind of niobic acid lithium doping silica fibre Raman amplifiction device, affiliated fiber optic communication and Fibre Optical Sensor neck
Domain.
Background technology
With high-speed, big bandwidth, the arrival in low-loss All fiber communication epoch, it is applied to the fiber amplifier of full optic relay
The research of device is at the task of top priority.Traditional erbium-doped fiber amplifier（EDFA）With high-gain, high-output power, low noise,
, there is good amplification characteristic in the advantages that unrelated with polarization in current communication band.
But as wavelength-division multiplex system is studied towards more capacity, the direction of farther transmission range is developed, and EDFA is gradual
" bottleneck " further promoted as power system capacity distance product.EDFA is limited by erbium ion first, and the gain bandwidth provided is about
70nm only accounts for the very small part of the 400nm low-loss available windows of all-wave fiber offer（M. N. Islam. Raman
amplifiers for telecommunications[J]. IEEE J. of Selected Topics in Quantum
Electronics, 2002,8(3): 548-559）.Secondly as EDFA needs the optical fiber of special er-doped as gain media,
Thus it is appropriate only for centralized amplification.
Therefore limited gain bandwidth and the pattern of centralization amplification so that EDFA is intensive from meeting large capacity of new generation
Wavelength-division multiplex（DWDM）The requirement that power system capacity distance product is further promoted.And fiber Raman amplifier（FRA）Effectively overcome
These problems, amplification wavelength is only related with pump wavelength, can theoretically amplify the light of arbitrary wavelength, and utilize more pumpings
Technology theoretically can reach arbitrary amplification bandwidth；FRA can do online amplification using Transmission Fibers, can effectively inhibit non-
Linear effect（N. Shu and E. Yoshihiro. Ultrabroad-Band Raman Amplifiers Pumped and
Gain-Equalized by Wavelength-Division-Multiplexed High-Power Laser Diodes[J].
IEEE Journal on selected topics in quantum electronics, 2011, 7(1): 3-16）.But
It is that traditional FRA mainly uses general single mode fiber as gain media, and gain coefficient is smaller, it is desirable that pumped over long distances with height
Apparent gain can be just obtained under conditions of Pu.
The gain coefficient of gain fibre how is improved, the fiber Raman amplifying device of more high-gain is obtained, it has also become is modern
One important research topic of optical communication field.
Invention content
Shortcoming in view of the above technology, the purpose of the present invention is to provide a kind of niobic acid lithium dopings of high Raman gain
Silica fibre Raman optical amplification device.The device has used the novel niobic acid lithium doping silica fibre with high Raman gain to replace
Traditional single mode optical fiber can effectively improve the amplification effect of signal light after the optimization of pump power and fiber lengths.
Illustrate how the purpose of the present invention is realize with reference to Fig. 1：
Fiber bragg grating 3 is inscribed on niobic acid lithium doping silica fibre 4 with phase masks, inscribes the main function of grating
It is reflected pump light, to improve pumping light utilization ratio.Grating is inscribed on gain fibre simultaneously can be to avoid using external light
The loss that grid are brought.
Raman optical amplification device is built by the way of backward pump, in addition to niobic acid lithium doping silica fibre 4, it is also necessary to use
To devices such as wave division multiplex coupler 5, optoisolator first 2 and second 7, high power pump lasers 6.
Coupling pump light can be entered niobic acid lithium doping silica fibre 4, pump light and signal light by wave division multiplex coupler 5
Stimulated Raman scattering enlarge-effect is generated in niobic acid lithium doping silica fibre 4, and letter is transferred to so as to cause pumping light power
Number light, realizes the amplification of signal light.
The output power of high power pump laser 6 is adjustable, and the device can be changed by pumping optical output power by adjusting
Amplification effect, to change the power of output signal light.
Optoisolator first 2 and second 7 there are one respectively being connect after the signal source 1 of apparatus of the present invention and before light power meter 8, it is therefore an objective to every
From the higher pump light of power, the safety in protection signal source 1 and light power meter 8 prevents because excessively high laser power damage is set
It is standby.
Signal light 1 is inputted from the input terminal of 4 Raman optical amplification device of niobic acid lithium doping silica fibre, via optoisolator first
2, fiber bragg grating 3 enters niobic acid lithium doping silica fibre 4, because stimulated raman scattering is in niobic acid lithium doping quartz light
It is amplified in fibre, and light power meter 8 is output to through wave division multiplex coupler 5 and optoisolator second 7.
According to above-mentioned explanation, the present invention uses following technical proposals：
A kind of niobic acid lithium doping silica fibre Raman optical amplification device, including signal source 1, optoisolator first 2, optical fiber Bragg light
Grid 3, niobic acid lithium doping silica fibre 4, wave division multiplex coupler 5, high power pump laser 6, optoisolator second 7, luminous power
Meter 8, it is characterised in that：The signal source 1 connects optoisolator first 2 by silica fibre, and optoisolator first 2 is mixed by lithium niobate
Miscellaneous silica fibre 4 connects wave division multiplex coupler, and the fiber bragg grating 3 is led on niobic acid lithium doping silica fibre 4
It crosses phase masks to inscribe, the wave division multiplex coupler 5 connects high power pump laser 6 and light by silica fibre
Isolator second 7, optoisolator second 7 connect light power meter 8 by silica fibre.
The niobic acid lithium doping silica fibre Raman optical amplification device is mixed using the lithium niobate of the low high Raman gain coefficienct of damage
Gain media of the miscellaneous silica fibre as amplifying device.Fiber bragg grating 3 for reflected pump light is as amplification
It is inscribed on the doped lithium niobate silica fibre 4 of medium, reduces the junction loss between device.Its amplification range be 1200 ~
1650nm。
The present invention compared with prior art, has following obvious substantive distinguishing features and remarkable advantage outstanding：
Using low-loss, gain fibre of the niobic acid lithium doping silica fibre 4 as raman amplifier of high Raman gain, produce
Raman optical amplification device gain be apparently higher than general single mode fiber raman amplifier.By changing 3 He of fiber bragg grating
The amplification of signal light within the scope of 1200 ~ 1650nm may be implemented in the wavelength of high power pump laser 6.
Description of the drawings
Fig. 1 is the structural schematic diagram of apparatus of the present invention.
Specific implementation mode
Details are as follows for embodiments of the present invention combination attached drawing：
Embodiment one：
Referring to Fig. 1, this niobic acid lithium doping silica fibre Raman optical amplification device, including signal source 1, optoisolator first 2, optical fiber cloth
Glug grating 3, niobic acid lithium doping silica fibre 4, wave division multiplex coupler 5, high power pump laser 6, optoisolator second 7,
Light power meter 8, it is characterised in that：The signal source 1 connects optoisolator first 2 by silica fibre, and optoisolator first 2 passes through niobium
Sour lithium doping silica fibre 4 connects wave division multiplex coupler, and the fiber bragg grating 3 is in niobic acid lithium doping silica fibre
It is inscribed by phase masks on 4, the wave division multiplex coupler 5 connects high power pump laser by silica fibre
6 and optoisolator second 7, optoisolator second 7 passes through silica fibre and connects light power meter 8.
Embodiment two：
The present embodiment and embodiment one are essentially identical, and special feature is as follows：
The niobic acid lithium doping silica fibre Raman optical amplification device is using the low niobic acid lithium doping stone for damaging high Raman gain coefficienct
Gain media of the English optical fiber as amplifying device.Fiber bragg grating 3 for reflected pump light is as amplification medium
Doped lithium niobate silica fibre 4 on inscribe, reduce the junction loss between device.Its amplification range be 1200 ~
1650nm。
Embodiment three：
As shown in Figure 1, this niobic acid lithium doping silica fibre Raman optical amplification device, including signal source 1, optoisolator first 2, optical fiber
Bragg grating 3, niobic acid lithium doping silica fibre 4, wave division multiplex coupler 5, high power pump laser 6, optoisolator second
7, light power meter 8；Each section has silica fibre to be connected, and wherein fiber bragg grating 3 is in niobic acid lithium doping silica fibre 4
On inscribe, optoisolator first 2, optoisolator second 7, the centre wavelength of fiber bragg grating 3 and high power pump laser
6 wavelength of device matches.
The operating principle of the present apparatus is as follows：
By opening signal source 1,6 power of pump laser is then adjusted, input signal light and pump light can be in niobic acid lithium doping stones
Stimulated raman scattering occurs in English optical fiber, to which by signal light amplification, light power meter 8 can measure amplified signal light work(
Rate.
Claims (4)
1. a kind of niobic acid lithium doping silica fibre Raman optical amplification device, including signal source（1）, optoisolator first（2）, optical fiber cloth
Glug grating（3）, niobic acid lithium doping silica fibre（4）, wave division multiplex coupler（5）, high power pump laser（6）, light every
From device second（7）, light power meter（8）, it is characterised in that：The signal source（1）Optoisolator first is connected by silica fibre（2）,
Optoisolator first（2）Pass through niobic acid lithium doping silica fibre（4）Connect wave division multiplex coupler, the fiber bragg grating
（3）It is in niobic acid lithium doping silica fibre（4）It is upper to be inscribed by phase masks, the wave division multiplex coupler（5）It is logical
Cross silica fibre connection high power pump laser（6）With optoisolator second（7）, optoisolator second（7）Connected by silica fibre
Connect light power meter（8）.
2. according to claim 1 niobic acid lithium doping silica fibre Raman optical amplification device, it is characterised in that：Using the low high Raman of damage
Gain media of the niobic acid lithium doping silica fibre of gain coefficient as amplifying device.
3. according to claim 1 niobic acid lithium doping silica fibre Raman optical amplification device, it is characterised in that：For reflected pump light
Fiber bragg grating（3）It is in the doped lithium niobate silica fibre as amplification medium（4）On inscribe, reduce device
Between junction loss.
4. according to claim 1 niobic acid lithium doping silica fibre Raman optical amplification device, it is characterised in that：Amplification range is 1200
~1650nm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810434970.0A CN108767635A (en) | 2018-05-09 | 2018-05-09 | Niobic acid lithium doping silica fibre Raman optical amplification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810434970.0A CN108767635A (en) | 2018-05-09 | 2018-05-09 | Niobic acid lithium doping silica fibre Raman optical amplification device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108767635A true CN108767635A (en) | 2018-11-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810434970.0A Pending CN108767635A (en) | 2018-05-09 | 2018-05-09 | Niobic acid lithium doping silica fibre Raman optical amplification device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110148876A (en) * | 2019-05-10 | 2019-08-20 | 上海大学 | A kind of Raman amplifiction device based on vulcanized lead doping silica fibre |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1369733A (en) * | 2001-06-27 | 2002-09-18 | 天津大学 | Distributed optical-fibre Raman Amplifier using novel pump source |
| US20030142389A1 (en) * | 2002-01-30 | 2003-07-31 | Stuart Gray | Double-pumped raman amplifier |
| US20040053768A1 (en) * | 2002-08-26 | 2004-03-18 | Alcatel | Raman-active opetical fiber |
| US20040196530A1 (en) * | 2003-03-06 | 2004-10-07 | Hunt Jeffrey H | Stimulated spin-flip raman optical amplifier |
| US20050237602A1 (en) * | 2004-04-26 | 2005-10-27 | Nec Corporation | Light amplification element, light amplification apparatus and light amplification system |
| CN105048270A (en) * | 2015-07-13 | 2015-11-11 | 山东大学 | Laser amplifier based on lithium niobate crystals and application thereof |
-
2018
- 2018-05-09 CN CN201810434970.0A patent/CN108767635A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1369733A (en) * | 2001-06-27 | 2002-09-18 | 天津大学 | Distributed optical-fibre Raman Amplifier using novel pump source |
| US20030142389A1 (en) * | 2002-01-30 | 2003-07-31 | Stuart Gray | Double-pumped raman amplifier |
| US20040053768A1 (en) * | 2002-08-26 | 2004-03-18 | Alcatel | Raman-active opetical fiber |
| US20040196530A1 (en) * | 2003-03-06 | 2004-10-07 | Hunt Jeffrey H | Stimulated spin-flip raman optical amplifier |
| US20050237602A1 (en) * | 2004-04-26 | 2005-10-27 | Nec Corporation | Light amplification element, light amplification apparatus and light amplification system |
| CN105048270A (en) * | 2015-07-13 | 2015-11-11 | 山东大学 | Laser amplifier based on lithium niobate crystals and application thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110148876A (en) * | 2019-05-10 | 2019-08-20 | 上海大学 | A kind of Raman amplifiction device based on vulcanized lead doping silica fibre |
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Application publication date: 20181106 |