CN108777428A - Raman fiber amplifier - Google Patents
Raman fiber amplifier Download PDFInfo
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- CN108777428A CN108777428A CN201810676768.9A CN201810676768A CN108777428A CN 108777428 A CN108777428 A CN 108777428A CN 201810676768 A CN201810676768 A CN 201810676768A CN 108777428 A CN108777428 A CN 108777428A
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- Prior art keywords
- light
- laser
- amplification
- fiber amplifier
- input terminal
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Classifications
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- 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
- H01S3/06754—Fibre amplifiers
-
- 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
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
- H01S3/094042—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a fibre laser
- H01S3/094046—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a fibre laser of a Raman fibre laser
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Lasers (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
The invention discloses a kind of Raman Fiber Amplifiers, it includes laser, pre-amplification component, narrow linewidth laser, bundling device part, pump light source, pump combiner, gain fibre, collimating mirror, frequency doubling device, residue signal light separator part group；Laser is for generating the first seed light；First seed light of the pre-amplification component for being generated to laser carries out pre-amplification at least once and forms the first seed light after pre-amplification；Narrow linewidth laser is for generating second of sub-light；Bundling device part is used to the first seed light after second of sub-light and pre-amplification closing beam into synthesis light；Pump combiner is for entering coupling pump light in gain fibre covering；The first seed light that gain fibre is used to synthesize in light is amplified and is brought it about Raman frequency shift and is amplified for that will synthesize second of sub-light in light, final output high power laser light.The present invention can not only improve Raman transfer efficiency, effectively inhibit detrimental non-linear effect, and ensure that its reliability.
Description
Technical field
The present invention relates to a kind of Raman Fiber Amplifiers.
Background technology
Currently, the yellowish green laser of 560nm is in many fluorescence-based imaging techniques (such as optical resolution photoacoustic microscope
(ORPAM), stimulated emission depletion microscope etc.), there is extremely important application in semiconductor characterisation and biochemical analysis field.
In recent years, using generation (SHG) effect of stimulated Raman scattering in Yb dosed optical fiber (SRS) and second harmonic, the wavelength is obtained
Laser exports, and has proved to be an important technological approaches.But the insertion loss due to component and raman amplifier light
The presence of detrimental non-linear effect in fibre, although traditional raman amplifier only is used only, it has very greatly in target wavelength
Flexibility, but will be in high-power green-yellow light coupled into optical fibres, it is necessary to introduce the Collimation optics of high precision, simultaneously
Due to the presence of photoinduction damage, Problem of System Reliability is caused.
Invention content
The technical problem to be solved by the present invention is to overcome the deficiencies of existing technologies, a kind of Raman Fiber Amplifier is provided,
It can not only improve Raman transfer efficiency, effectively inhibit detrimental non-linear effect, and ensure that its reliability.
In order to solve the above-mentioned technical problem, the technical scheme is that：A kind of Raman Fiber Amplifier, it includes：
Laser, the laser is for generating the first seed light；
The first seed light for being generated to laser carries out pre-amplification at least once and forms the first seed light after pre-amplification
Pre-amplification component；
Narrow linewidth laser, the narrow linewidth laser is for generating second of sub-light；
Bundling device part for the first seed light after second of sub-light and pre-amplification to be closed beam into synthesis light；
Pump light source, for generating pump light；
Pump combiner for coupling pump light to be entered to gain fibre covering；
Amplify and bring it about Raman frequency shift and in light will to be synthesized for the first seed light in light will to be synthesized
Two seed lights are amplified, the gain fibre of final output high power laser light；
The collimating mirror that collimation forms laser after collimation is carried out for the high power laser light to output；
The frequency doubling device that process of frequency multiplication forms double-frequency laser is carried out for laser after collimation；
Residue signal light separator part for detaching laser needed for the residue signal light in double-frequency laser and final output
Group.
A kind of concrete structure of pre-amplification component is further provided, the pre-amplification component includes at least one pre-amplification
Device, the pre-amplification device include fiber amplifier and coupler, the output end of the fiber amplifier and coupler it is defeated
Enter end to be connected, the coupler is used to monitor the power of the first seed light after fiber amplifier pre-amplification, and prevents pre-
Amplified first seed light back-propagation.
Further, the pre-amplification device is provided with two-stage, respectively the first pre-amplification device and the second pre-amplification device,
The first pre-amplification device includes the first fiber amplifier and the first coupler, and the second pre-amplification device includes the second light
The input terminal of fiber amplifier and the second coupler, first fiber amplifier is connected with the output end of the laser, described
The input terminal of first coupler is connected with the output end of first fiber amplifier, an output end of first coupler with
The input terminal of second fiber amplifier is connected, and the input terminal of second coupler is defeated with second fiber amplifier
Outlet is connected, and an output end of second coupler is connected with an input terminal of bundling device part.
Further, an input terminal of the bundling device part is connected with the output end of pre-amplification component, the bundling device part
Another input terminal is connected with output end of the narrow linewidth laser through isolator, output end and the pump of the bundling device part
The input terminal of Pu bundling device is connected.
Further, the bundling device part is wavelength division multiplexer.
Further, the pumping light input end of the pump combiner is connected with the output end of the pump light source, the pump
The conjunction beam output end of Pu bundling device is connected with the input terminal of gain fibre.
Further for that can remove unabsorbed pump light in covering, the output end welding of the gain fibre has guarantor
Polarisation is fine, and the fusion point of polarization maintaining optical fibre and gain fibre is coated with high folding glue.
Further for can calibrate the second harmonic generated during process of frequency multiplication, the incidence end of the frequency doubling device with
On optowire between collimating mirror and/or the incidence end of the exit end of the frequency doubling device and residue signal light separator part group
Between optowire on be provided with planoconvex spotlight for calibrating the second harmonic generated during process of frequency multiplication.
It is calibrated further for laser after collimation, ensures its phase matched, the collimating mirror and close to described times
It is provided with half-wave plate on optowire between the planoconvex spotlight of the incidence end of frequency device.
Further, the residue signal light separator part group includes the first dichroscope and the second dichroscope, and described the
One dichroscope is used for the double-frequency laser that incident frequency doubling device is formed and is emitted the laser by first separation, the described 2nd 2 to
Look mirror is for the incident finally formed required laser after secondary separation by the laser of first separation and outgoing.
After using above-mentioned technical proposal, the present invention proposes Raman Fiber Amplifier technical solution, passes through frequency multiplication Raman position
The output laser of shifting fiber system, the signal light using the continuous signal light of narrow linewidth as SRS, can not only solve existing skill
The problem of needing to introduce the Collimation optics of high precision in art, can also solve the presence damaged due to photoinduction, cause
Problem of System Reliability, furthermore it is also possible to obtain high Raman transfer efficiency.
Description of the drawings
Fig. 1 is the structural schematic diagram of the Raman Fiber Amplifier of the present invention.
Specific implementation mode
In order that the present invention can be more clearly and readily understood, right below according to specific embodiment and in conjunction with attached drawing
The present invention is described in further detail.
As shown in Figure 1, a kind of Raman Fiber Amplifier, it includes：
Laser 1, the laser 1 is for generating the first seed light；The laser 1 is specially semiconductor laser；
The first seed light for being generated to laser 1 carries out pre-amplification at least once and forms the first seed light after pre-amplification
Pre-amplification component；
Narrow linewidth laser 6, the narrow linewidth laser 6 is for generating second of sub-light；
Bundling device part 7 for the first seed light after second of sub-light and pre-amplification to be closed beam into synthesis light；
Pump light source 8, for generating pump light；Pump light source 8 is specially multimode laser diode, the pump light generated
Wavelength be 976nm；
Pump combiner 9 for coupling pump light to be entered to gain fibre covering；Pump combiner 9 is specially multi-mode pump
Pu bundling device；
Amplify and bring it about Raman frequency shift and in light will to be synthesized for the first seed light in light will to be synthesized
Two seed lights are amplified, the gain fibre of final output high power laser light；The gain fibre is specially single-mode ytterbium-doping optical fiber,
The length of 6m；
The collimating mirror 10 that collimation forms laser after collimation is carried out for the high power laser light to output；Collimating mirror 10 is specially
It is coated with the non-spherical lens of anti-reflective film；
The frequency doubling device 12 that process of frequency multiplication forms double-frequency laser is carried out for laser after collimation；Frequency doubling device 12 is specially
Periodic polarized lithium tantalate (PPLT) crystal of 20mm long；
Residue signal light separator part for detaching laser needed for the residue signal light in double-frequency laser and final output
Group.
As shown in Figure 1, the pre-amplification component includes at least one pre-amplification device, the pre-amplification device includes optical fiber
Amplifier and coupler, fiber amplifier are specially ytterbium doped optical fiber amplifier, the output end and coupler of the fiber amplifier
Input terminal be connected, the coupler is used to monitor the power of the first seed light after fiber amplifier pre-amplification, and prevents
Only the first seed light back-propagation after pre-amplification.Specifically, the pre-amplification device is provided with two-stage, and respectively first puts in advance
Big device and the second pre-amplification device, the first pre-amplification device include the first fiber amplifier 2 and the first coupler 3, institute
It includes the second fiber amplifier 4 and the second coupler 5, the input terminal of first fiber amplifier 2 to state the second pre-amplification device
It is connected with the output end of the laser 1, the output of the input terminal of first coupler 3 and first fiber amplifier 2
End is connected, and an output end of first coupler 3 is connected with the input terminal of second fiber amplifier 4, second coupling
The input terminal of clutch 5 is connected with the output end of second fiber amplifier 4, an output end and the conjunction of second coupler 5
One input terminal of beam device is connected.
As shown in Figure 1, an input terminal of the bundling device part 7 and the second coupler 5 in the pre-amplification device of most final stage
Output end be connected, another input terminal and output end phase of the narrow linewidth laser 6 through isolator of the bundling device part 7
Even, the output end of the bundling device part 7 is connected with the input terminal of the pump combiner 9；
As shown in Figure 1, the bundling device part is wavelength division multiplexer, but not limited to this.
As shown in Figure 1, the pumping light input end of the pump combiner 9 is connected with the output end of the pump light source 8, institute
The conjunction beam output end for stating pump combiner 9 is connected with the input terminal of gain fibre.
In order to remove unabsorbed pump light in covering, the output end welding of the gain fibre has polarization-maintaining light
Fibre, and the fusion point of polarization maintaining optical fibre and gain fibre is coated with high folding glue；Specifically, the length of polarization maintaining optical fibre is 0.8m.
As shown in Figure 1, on optowire between the incidence end and collimating mirror 10 of the frequency doubling device 12 and described times
It is provided on optowire between the exit end and the incidence end of residue signal light separator part group of frequency device 12 for calibrating
The planoconvex spotlight of the second harmonic generated during process of frequency multiplication；Wherein, the incidence end of the frequency doubling device 12 and collimating mirror 10
Between the planoconvex spotlight of optowire be the first planoconvex spotlight 13, the exit end of the frequency doubling device 12 and residue signal light point
The planoconvex spotlight on the optowire between incidence end from device group is the second planoconvex spotlight 14.
In order to which laser is calibrated after collimation, ensure its phase matched, as shown in Figure 1, the collimating mirror 10 and close
Half-wave plate 11 is provided on optowire between the planoconvex spotlight of the incidence end of the frequency doubling device 12.
As shown in Figure 1, the residue signal light separator part group includes the first dichroscope 15 and the second dichroscope 16,
First dichroscope 15 is used for the double-frequency laser that incident frequency doubling device 12 is formed and is emitted the laser by first separation, institute
State the second dichroscope 16 for incidence by the laser of first separation and be emitted finally formed required after secondary separation
Laser.
In the present embodiment, the wavelength for the first seed light that laser 1 is sent out is 1064nm, and narrow linewidth laser 6 generates
The wavelength of second of sub-light be 1120nm, the wavelength of the required laser eventually formed is 560nm.
Working principle of the present invention is as follows：
The first seed light that laser 1 is sent out carries out pre-amplification through the first fiber amplifier 2, the second fiber amplifier 4,
After each fiber amplifier, all weldings have the coupler with isolation features, correspond to the first coupler 3, the second coupling respectively
Clutch 5, coupler prevent the signal light back-propagation of amplification for monitoring the first seed light power.Before Raman amplifiction,
Narrow linewidth laser 6 is closed through wavelength division multiplexer 7 and the first seed pulse signal light Jing Guo two-stage pre-amplification again by isolator
At a branch of, Raman amplification system uses the single-mode ytterbium-doping optical fiber of 6m long, and pump light source 8 is through the progress cladding pumping of pump combiner 9.
There are the polarization maintaining optical fibre of one section of 0.8m, the high folding glue of fusion point coating, to remove covering in the output end welding of single-mode ytterbium-doping optical fiber
In unabsorbed pump light.1120nm laser by polarization maintaining optical fibre output, through be coated with antireflection mould non-spherical lens carry out
After collimation, frequency multiplication is carried out to the laser of output using frequency doubling device 12.The linearly polarized photon of output is carried out using half-wave plate 11
Calibration, to ensure phase matched, generated second harmonic is calibrated using the first planoconvex spotlight 13 and the second planoconvex spotlight 14,
It is then detached with residue signal light using the first dichroscope 15 and the second dichroic Mirror 16, it is defeated finally to obtain 560nm laser
Go out.
Particular embodiments described above, pair present invention solves the technical problem that, technical solution and advantageous effect carry out
It is further described, it should be understood that the above is only a specific embodiment of the present invention, is not limited to this
Invention, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in this hair
Within bright protection domain.
Claims (10)
1. a kind of Raman Fiber Amplifier, which is characterized in that it includes：
Laser (1), the laser (1) is for generating the first seed light；
The first seed light for being generated to laser (1) carries out pre-amplification at least once and forms the first seed light after pre-amplification
Pre-amplification component；
Narrow linewidth laser (6), the narrow linewidth laser (6) is for generating second of sub-light；
Bundling device part (7) for the first seed light after second of sub-light and pre-amplification to be closed beam into synthesis light；
Pump light source (8), for generating pump light；
Pump combiner (9) for coupling pump light to be entered to gain fibre covering；
Amplify and bring it about Raman frequency shift and for second in light will to be synthesized for the first seed light in light will to be synthesized
Sub-light is amplified, the gain fibre of final output high power laser light；
The collimating mirror (10) that collimation forms laser after collimation is carried out for the high power laser light to output；
The frequency doubling device (12) that process of frequency multiplication forms double-frequency laser is carried out for laser after collimation；
Residue signal light separator part group for detaching laser needed for the residue signal light in double-frequency laser and final output.
2. Raman Fiber Amplifier according to claim 1, it is characterised in that：The pre-amplification component includes at least one
Pre-amplification device, the pre-amplification device include fiber amplifier and coupler, the output end of the fiber amplifier with couple
The input terminal of device is connected, and the coupler is used to monitor the power of the first seed light after fiber amplifier pre-amplification, and
Prevent the first seed light back-propagation after pre-amplification.
3. Raman Fiber Amplifier according to claim 2, it is characterised in that：The pre-amplification device is provided with two-stage,
Respectively the first pre-amplification device and the second pre-amplification device, the first pre-amplification device include the first fiber amplifier (2)
With the first coupler (3), the second pre-amplification device includes the second fiber amplifier (4) and the second coupler (5), and described the
The input terminal of one fiber amplifier (2) is connected with the output end of the laser (1), the input terminal of first coupler (3)
It is connected with the output end of first fiber amplifier (2), an output end and second optical fiber of first coupler (3)
The input terminal of amplifier (4) is connected, the output of the input terminal of second coupler (5) and second fiber amplifier (4)
End is connected, and an output end of second coupler (5) is connected with an input terminal of bundling device part (7).
4. Raman Fiber Amplifier according to claim 1, it is characterised in that：One input terminal of the bundling device part (7)
Be connected with the output end of pre-amplification component, another input terminal of the bundling device part (7) and the narrow linewidth laser (6) through every
It is connected from the output end after device, the output end of the bundling device part (7) is connected with the input terminal of the pump combiner (9).
5. Raman Fiber Amplifier according to claim 1 or 4, it is characterised in that：The bundling device part (7) is multiple for wavelength-division
Use device.
6. Raman Fiber Amplifier according to claim 1, it is characterised in that：The pump light of the pump combiner (9)
Input terminal is connected with the output end of the pump light source (8), and the pump combiner (9) closes beam output end and gain fibre
Input terminal is connected.
7. Raman Fiber Amplifier according to claim 1 or 6, it is characterised in that：The output end of the gain fibre is molten
It is connected to polarization maintaining optical fibre, and the fusion point of polarization maintaining optical fibre and gain fibre is coated with high folding glue.
8. Raman Fiber Amplifier according to claim 1, it is characterised in that：The incidence end of the frequency doubling device (12) with
On optowire between collimating mirror (10) and/or the exit end of the frequency doubling device (12) and residue signal light separator part group
Incidence end between optowire on be provided with planoconvex spotlight for calibrating the second harmonic generated during process of frequency multiplication.
9. Raman Fiber Amplifier according to claim 8, it is characterised in that：The collimating mirror (10) and close to described times
Half-wave plate (11) is provided on optowire between the planoconvex spotlight of the incidence end of frequency device (12).
10. Raman Fiber Amplifier according to claim 1, it is characterised in that：The residue signal light separator part group
Including the first dichroscope (15) and the second dichroscope (16), first dichroscope (15) is used for incident frequency doubling device
(12) double-frequency laser that is formed simultaneously is emitted laser by first separation, and second dichroscope (16) passes through one for incident
The laser of secondary separation is simultaneously emitted the finally formed required laser after secondary separation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810676768.9A CN108777428A (en) | 2018-06-27 | 2018-06-27 | Raman fiber amplifier |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810676768.9A CN108777428A (en) | 2018-06-27 | 2018-06-27 | Raman fiber amplifier |
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| CN108777428A true CN108777428A (en) | 2018-11-09 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102522693A (en) * | 2011-12-20 | 2012-06-27 | 山东理工大学 | Fiber Raman yellow laser based on main oscillation power amplifier |
| CN104104000A (en) * | 2014-07-10 | 2014-10-15 | 中国科学院上海光学精密机械研究所 | Multi-cladding raman optical fiber amplifier |
| CN106063056A (en) * | 2014-01-06 | 2016-10-26 | Ipg光子公司 | Ultra-high power single mode green fiber laser operating in continuous wave and quasi-continuous wave regimes |
| CN208401250U (en) * | 2018-06-27 | 2019-01-18 | 芜湖安瑞激光科技有限公司 | Raman fiber amplifier |
-
2018
- 2018-06-27 CN CN201810676768.9A patent/CN108777428A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102522693A (en) * | 2011-12-20 | 2012-06-27 | 山东理工大学 | Fiber Raman yellow laser based on main oscillation power amplifier |
| CN106063056A (en) * | 2014-01-06 | 2016-10-26 | Ipg光子公司 | Ultra-high power single mode green fiber laser operating in continuous wave and quasi-continuous wave regimes |
| CN104104000A (en) * | 2014-07-10 | 2014-10-15 | 中国科学院上海光学精密机械研究所 | Multi-cladding raman optical fiber amplifier |
| CN208401250U (en) * | 2018-06-27 | 2019-01-18 | 芜湖安瑞激光科技有限公司 | Raman fiber amplifier |
Non-Patent Citations (1)
| Title |
|---|
| 林怀钦等: "高功率全光纤掺镱皮秒光纤激光器", 中国激光 * |
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