CN105759531B - A kind of super continuum source - Google Patents
A kind of super continuum source Download PDFInfo
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- CN105759531B CN105759531B CN201610311546.8A CN201610311546A CN105759531B CN 105759531 B CN105759531 B CN 105759531B CN 201610311546 A CN201610311546 A CN 201610311546A CN 105759531 B CN105759531 B CN 105759531B
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/365—Non-linear optics in an optical waveguide structure
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/3528—Non-linear optics for producing a supercontinuum
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
- G02F2201/20—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 delay line
- G02F2201/205—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 delay line of fibre type
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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
- H01S2301/00—Functional characteristics
- H01S2301/08—Generation of pulses with special temporal shape or frequency spectrum
- H01S2301/085—Generation of pulses with special temporal shape or frequency spectrum solitons
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- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lasers (AREA)
Abstract
The embodiment of the invention discloses a kind of super continuum source, light source includes seed source system, amplification system and white light generation system, wherein seed source system includes at least optical fiber laser, connect by single mode optical fiber with the amplification system, for generating ultrashort pulse；Amplification system, including at least main amplification subsystem, for the ultrashort pulse to be amplified, main amplification subsystem, it include: the first multimode laser diode, the first bundling device, the first pump light stripper, wherein, first bundling device is connect by the first large mode field gain fibre with first pump light stripper, and first bundling device is connect by optical fiber with first multimode laser diode；The white light generation system, including mould field adapter and photonic crystal fiber, for exporting super continuous spectrums white light, wherein the mould field adapter is connect with first isolator and the photonic crystal fiber respectively by optical fiber.Using the embodiment of the present invention, the output of mean power can be improved.
Description
Technical field
The present invention relates to light source field, in particular to a kind of super continuum source.
Background technique
Super continuous spectrums (super continuum, SC) generation is the linear effect of medium since pulse is in medium transmission
The spectrum of pulse is caused greatly to be widened with nonlinear effect.When pulse is transmitted in a fiber, time domain and frequency domain develop not
Only by such as Self-phase modulation (self-phase modulation, SPM), Cross-phase Modulation (cross phase
Modulation, XPM), four-wave mixing (four wave mixing, FWM), stimulated Raman scattering (stimulated Raman
Scattering, SRS) and stimulated Brillouin scattering (stimulated Brillouin scattering, SBS), Gu Zifen
A variety of nonlinear effects such as solution, soliton self-frequency sh, dispersive wave generate, orphan's (dispersive wave) capture, and light pulse is decomposed, but also by
The influence of fibre-optical dispersion characteristic, all these linear and nonlinear processes all generate new frequency content in pulse frequency spectrum.
Super continuum source can export ultra-wide spectrum laser, in coherent lights such as biology, medicine, physics, national defence and industry
Source or spectrum analysis have to be had important application on the field of high request.
As the functional requirement to super continuum source is higher and higher, super continuum source needs defeated with high-average power
The performance composed out with extremely wide continuous.Existing super continuum source, the mean power of output are about 3W, the mean power of output compared with
It is low, and then it is not able to satisfy the requirement to high-average power output.
Summary of the invention
The embodiment of the present invention is designed to provide a kind of super continuum source, to improve the output of mean power.
In order to achieve the above objectives, the embodiment of the invention discloses a kind of super continuum sources.Technical solution is as follows:
The light source includes seed source system, amplification system and white light generation system, wherein
The seed source system includes at least optical fiber laser, is connect, be used for the amplification system by single mode optical fiber
Generate ultrashort pulse；
The amplification system includes at least main amplification subsystem, for the ultrashort pulse to be amplified, main amplification
System, comprising:
First multimode laser diode, the first bundling device, the first pump light stripper, wherein first bundling device is logical
The first large mode field gain fibre is crossed to connect with first multimode laser diode, first bundling device by optical fiber with it is described
The connection of first pump light stripper；
The white light generation system, including mould field adapter and photonic crystal fiber, for exporting super continuous spectrums white light,
In, the mould field adapter is connect with first isolator and the photonic crystal respectively by optical fiber.
Preferably, the amplification system, further includes:
Amplification subsystem is assisted, the auxiliary amplification subsystem includes at least one level auxiliary amplifying device, and the auxiliary is put
The pump power of big subsystem is less than the pump power of main amplification subsystem.
Preferably, in the case where the auxiliary amplification subsystem includes N grades of auxiliary amplifying devices and N >=2,
The pump power of N grades of auxiliary amplifying devices is greater than the pump power of N-1 grades of auxiliary amplifying devices；
First order auxiliary amplifying device, including single mode laser diode, beam merging apparatus and the first isolator, the conjunction are got one's things ready
It sets and is connected by the first isolator described in the first gain fibre, the beam merging apparatus passes through single mode optical fiber and the seed source system
Connection, first isolator are connect by optical fiber with second level amplifying device；
I-stage auxiliary amplifying device, including the i-th multimode laser diode, the i-th bundling device, the i-th pump light stripper and
I isolator, wherein i belongs to 2 to N-1, and i-th bundling device is connect by optical fiber with i-th multimode laser diode, institute
It states the i-th bundling device to connect by the i-th large mode field gain fibre with i-th pump light stripper, i-th isolator passes through light
Fibre is connect with i-th pump light stripper and the i+1 grade auxiliary amplifying device respectively；
N grades of auxiliary amplifying devices, including N multimode laser diode, N bundling device, N pump light stripper and
N isolator, the N bundling device pass through the big mould of N by optical fiber and the N multimode laser diode, the N bundling device
Field gain fibre is connect with the N pump light stripper, and the N isolator is shelled with the N pump light respectively by optical fiber
It is connected from device with first bundling device.
Preferably, in the case where the auxiliary amplification subsystem includes level-one auxiliary amplifying device,
The auxiliary amplifying device includes single mode laser diode, beam merging apparatus and isolator, and the beam merging apparatus passes through
The connection of isolator described in gain fibre, the beam merging apparatus are connect by single mode optical fiber with the seed source system, the isolation
Device is connect by optical fiber with first bundling device.
Preferably, the seed source system further include:
Isolator, wherein the isolator is connect by single mode optical fiber with the optical fiber laser, by optical fiber with it is described
Amplification system connection.
Preferably, the beam merging apparatus are as follows:
Wavelength division multiplexer or bundling device.
Preferably, the central wavelength of the ultrashort pulse is in the operating wavelength range of the single mode optical fiber.
Preferably, first gain fibre are as follows:
Single-mode ytterbium-doping optical fiber.
Preferably, the first large mode field gain fibre, the i-th large mode field gain fibre and the N large mode field increase
Beneficial optical fiber is equal are as follows:
LMA-YDF。
Preferably, it is characterized in that, the optical fiber laser are as follows:
Totally positive dispersion cavity Active Mode-locked Fiber Laser.
As seen from the above technical solution, the embodiment of the present invention provides a kind of super continuum source, and light source includes seed source system
System, amplification system and white light generation system, wherein the seed source system includes at least optical fiber laser, passes through single mode optical fiber
It is connect with the amplification system, for generating ultrashort pulse；The amplification system includes at least main amplification subsystem, and being used for will
The ultrashort pulse amplification, the main amplification subsystem, comprising: the first multimode laser diode, the first bundling device, the first pumping
Photospallation device, wherein first bundling device is connected by the first large mode field gain fibre and first multimode laser diode
It connects, first bundling device is connect by optical fiber with first pump light stripper；The white light generation system, including mould field
Adapter and photonic crystal fiber, for exporting super continuous spectrums white light, wherein the mould field adapter by optical fiber respectively with institute
The first isolator is stated to connect with the photonic crystal fiber.The embodiment of the present invention puts ultrashort pulse power by amplification system
Greatly, it can be improved the output of mean power.
Certainly, it implements any of the products of the present invention or method must be not necessarily required to reach all the above excellent simultaneously
Point.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is a kind of structural schematic diagram of super continuum source provided in an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of another super continuum source provided in an embodiment of the present invention；
Fig. 3 is the intensity and spectrogram for the ultrashort pulse that the embodiment of the present invention generates；
Fig. 4 is the song that the output power of main amplification subsystem and the output power of super continuum source change with pump power
Line chart；
Fig. 5 is the super continuous spectrums schematic diagram that super continuum source generates in the embodiment of the present invention；
Fig. 6 is the structural schematic diagram of another super continuum source provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In order to solve prior art problem, the embodiment of the invention provides a kind of super continuum sources.Below by specific
The embodiment of the present invention is described in detail in embodiment.
Referring to Fig.1, a kind of super continuum source provided in an embodiment of the present invention, light source include seed source system 100, amplification
System 200 and white light generation system 300, wherein
The seed source system 100 includes at least optical fiber laser, passes through single mode optical fiber 101 and the amplification system 200
Connection, for generating ultrashort pulse；
The amplification system 200 includes at least main amplification subsystem 210, for amplifying the ultrashort pulse, the master
Amplification subsystem, comprising:
First multimode laser diode 213, the first bundling device 211, the first pump light stripper 212, wherein described first
Bundling device 211 is connect by the first large mode field gain fibre with first pump light stripper 212, first bundling device
211 are connect by optical fiber with first multimode laser diode 213；
The white light generation system 300, including mould field adapter 301 and photonic crystal fiber 302, it is super continuous for exporting
Compose white light, wherein the mould field adapter 301 is connect by optical fiber with first pump light stripper 212, and the mould field is suitable
Orchestration is connect with the photonic crystal fiber 302.
It will be appreciated by persons skilled in the art that ultrashort pulse (Ultra short pulse) is to continue in optics
Time is in femtosecond (10-15The power second) order of magnitude or shorter electromagnetic pulse.Ultrashort pulse can be generated by optical fiber laser, light
Fibre laser (Fiber Laser) refers to the laser for using optical fiber as gain media.The working principle of optical fiber laser is:
High power density is easily formed under the action of pump light in optical fiber, causing the laser levels of working-laser material, " population is anti-
Turn ", it is suitably added positive feedback loop (constituting resonant cavity), pulse output can be formed.
It should be noted that single mode optical fiber (SMF) 101 is the optical fiber that can only transmit one mode light, chirp can be caused,
When chirp is transmission single pulse the phenomenon that central wavelength instantaneous offsets.
It will be appreciated by persons skilled in the art that the main function of amplification system 200 is to put the power of ultrashort pulse
Greatly.First multimode laser diode (MM-LD) 213 is a kind of output laser diode of more transverse modes, can be with coupling multimode optical fiber
Output, the universal feature with laser diode, can generate pump light.In practical applications, can according to need will be ultrashort
The multiple of pulse amplifying and the attribute of itself determine the quantity of the first multimode laser diode 213, it is assumed that the first multi-mode laser two
The power of pole pipe 213 is 25W, and the power amplification of ultrashort pulse to predetermined power is needed 100W, then needs 4 the first MM-
LD213 needs 2 the first MM-LD213 if the power of the first MM-LD213 is 50W.Correspondingly, the first bundling device 211
Input terminal quantity changed accordingly according to the quantity of the first multi-mode diode 213.Optical fiber described in the embodiment of the present invention is energy
It is enough that pulse is transmitted, but not to the optical fiber that the power of pulse amplifies, the core diameter of optical fiber and large mode field gain
The core diameter of optical fiber is identical.In Fig. 1, different types of optical fiber is represented using the connecting line of different thicknesses, is represented with filament
Optical fiber mentioned here represents other optical fiber with thick line, for example, representing SMF101, first large mode field gain fibre etc. with thick line
Deng.
It will be appreciated by persons skilled in the art that the first bundling device 211 is by pump light and ultrashort pulse carries out and beam, it will
The power amplification of ultrashort pulse.First pump light stripper 212 fails to be inhaled for removing in the first large mode field gain fibre
The pump light of receipts prevents energy stacking so as to cause optical fiber scaling loss.First large mode field gain fibre is a kind of large mode field optical fiber, greatly
Mould field (Large mode area, LMA) optical fiber refers to the optical fiber possessed compared with big mode field area.LMA fiber is usually double clad knot
Structure has biggish core diameter.The inner cladding of LMA fiber is pumping optical channel, and fibre core is pulse passage.Pump light enters ruler
Very little biggish inner cladding, reflects in inner cladding and repeatedly passes through fibre core and be doped example absorption, realizes the amplification of arteries and veins, obtains height
Beam quality, high-power pulse output.Since the mode field area of LMA fiber is larger, the light energy on unit area is smaller, because
This effectively increases optical fiber damage threshold, while inhibiting the generation of nonlinear effect.
It should be noted that mould field adapter 301 is for different core optical fibers butt coupling transition devices, in the present invention
In embodiment, mould field adapter 301 can be effectively reduced the welding of optical fiber and photonic crystal fiber and caused by transmission loss.
Micro- knot it should be noted that photonic crystal fiber (Photonic Crystal Fibers, PCF) 201 is otherwise known as
Structure optical fiber (Micro-Structured Fibers, MSF) has more complex index distribution on its cross section, usually contains
The stomata of different spread patterns, substantially in same magnitude, pulse can be limited in low the scale and optical wavelength of these stomatas
It propagates in the fiber cores area of refractive index.When ultrashort pulse is transmitted in PCF, due to the nonlinear effect of PCF, soliton effect etc.,
So that the pulse spectrum of output light broadens.
It should be noted that discharge time, discharge magnitude, strength of discharge etc. of the embodiment of the present invention by control heat sealing machine
Parameter ensure that the low loss welding of variety classes optical fiber, guarantees the higher light conversion efficiency of ultrashort pulse, helps to improve flat
The output of equal power.
Specifically, the seed source system 200 further include:
Isolator, wherein the isolator is connect by SMF201 with the optical fiber laser, is put by optical fiber with described
Big system 200 connects.
It will be appreciated by persons skilled in the art that isolator mentioned here is a kind of nothing for only Unidirectional light being allowed to pass through
Source optical device, its working principle is that the nonreciprocity of rotation.Isolator is mainly made using the Faraday effect of magneto-optical crystal, special
Property be: positive insertion loss is low, and reverse isolation degree is high, and return loss is high, so can be by by the pulse of optical fiber echo reflection
Isolator is isolated well, improves pulse efficiency of transmission.Here isolator can be good at the pulse of separating echo reflection, improve
Pulse efficiency of transmission prevents the pulse of echo reflection from damaging optical fiber laser.
Specifically, the central wavelength of the ultrashort pulse is in the operating wavelength range of the SMF.
It will be appreciated by persons skilled in the art that working as operating wavelength range of the central wavelength in SMF101 of ultrashort pulse
Interior, ultrashort pulse could be transmitted in SMF101.
Specifically, the optical fiber laser are as follows: Totally positive dispersion cavity Active Mode-locked Fiber Laser.
It will be appreciated by persons skilled in the art that being used as gain media in Totally positive dispersion cavity Active Mode-locked Fiber Laser
Optical fiber be entirely positive dispersion optical fiber, the characteristics of positive dispersion are as follows: with the increase of wavelength, refractive index value becomes smaller, angle dispersion
Rate becomes smaller, and the relationship between wavelength and refractive index value meets Cauchy's formula.Active mode locking is using periodic modulation resonant cavity
The method of parameter, i.e., one modulator modulated by external signal of insertion, periodical with certain modulating frequency in resonant cavity
Change resonant cavity in oscillation mode amplitude or phase.When the modulating frequency of selection and equal longitudinal mode spacing, to each mould
It is consistent with the frequency of two adjacent longitudinal modes to modulate the side frequency frequency generated.It is all moulds due to the interaction between mode
Reach synchronous under sufficiently strong modulation, forms mode locking pulse sequence.Active mode locking can pass through amplitude modulation or phase-modulation
To realize.The central wavelength for the ultrashort pulse that Totally positive dispersion cavity Active Mode-locked Fiber Laser generates can be in a certain range
Variation.
Using the embodiment of the present invention, amplification by amplification system to ultrashort pulse power can be improved mean power
Output.
Referring to Fig. 2, another kind super continuum source provided in an embodiment of the present invention, light source includes seed source system 100, is put
Big system 200 and white light generation system 300, wherein
The seed source system 100 includes at least optical fiber laser, is connect by SMF101 with the amplification system 200,
For generating ultrashort pulse；
The amplification system 200 includes at least main amplification subsystem 210, for amplifying the ultrashort pulse, the master
Amplification subsystem, comprising:
First MM-LD213, the first bundling device 211, the first pump light stripper 212, wherein first bundling device 211
It is connect by the first large mode field gain fibre with first pump light stripper 212, first bundling device 211 passes through optical fiber
It is connect with the first MM-LD213；
The amplification system 200, further includes:
Amplification subsystem 220 is assisted, the auxiliary amplification subsystem includes N grades of auxiliary amplifying devices and N >=2, described
The pump power of amplification subsystem is assisted to be less than the pump power of main amplification subsystem；
The pump power of N grades of auxiliary amplifying devices is greater than the pump power of N-1 grades of auxiliary amplifying devices；
First order auxiliary amplifying device, including SM-LD, beam merging apparatus and the first isolator, the beam merging apparatus pass through the
The connection of first isolator described in one gain fibre, the beam merging apparatus is connect by SMF101 with the seed source system, described
First isolator is connect by optical fiber with second level amplifying device；
I-stage auxiliary amplifying device, including the i-th MM-LD, the i-th bundling device, the i-th pump light stripper and the i-th isolator,
Wherein, i belongs to 2 to N-1, and i-th bundling device is connect by optical fiber with i-th MM-LD, and i-th bundling device passes through the
I large mode field gain fibre is connect with i-th pump light stripper, and i-th isolator is pumped with described i-th respectively by optical fiber
Pu photospallation device is connected with the i+1 grade auxiliary amplifying device；
N grades of auxiliary amplifying devices, including NMM-LD, N bundling device, N pump light stripper and N isolator,
The N bundling device by optical fiber and the N MM-LD, the N bundling device by N large mode field gain fibre with it is described
N pump light stripper connection, the N isolator by optical fiber respectively with the N pump light stripper and described first
Bundling device connection；
The white light generation system 300, including mould field adapter 301 and PCF302, for exporting super continuous spectrums white light,
In, the mould field adapter 301 is connect by optical fiber with first pump light stripper 212, the mould field adapter and institute
State PCF302 connection.
It should be noted that the pump power of auxiliary amplification subsystem 220 is less than the pumping function of main amplification subsystem 210
Rate can guarantee that the pump power for assisting amplification subsystem 220 is maintained at lower level, to effectively inhibit Ramam effect
It generates, is conducive to the power that ultrashort pulse is further amplified in main amplification subsystem 210.
It will be appreciated by persons skilled in the art that previous stage auxiliary amplifying device is made in auxiliary amplification subsystem 220
The core diameter of optical fiber is less than the core diameter of the used optical fiber of rear stage auxiliary amplifying device；Similarly, previous stage assists
The core diameter of gain fibre used in amplifying device is less than the fibre core of the used gain fibre of rear stage auxiliary amplifying device
Diameter.It assists in amplification subsystem 220, core diameter and this grade auxiliary of optical fiber used in every level-one auxiliary amplifying device are put
The core diameter of gain fibre used in big device is equal.It should be noted that gain fibre mentioned here is every level-one
The optical fiber amplified used in auxiliary amplifying device to the power of ultrashort pulse, such as the first gain fibre, the i-th large mode field increase
Beneficial optical fiber, N large mode field gain fibre.
Specifically, the seed source system 200 further include:
Isolator, wherein the isolator is connect by SMF101 with the optical fiber laser, is put by optical fiber with described
Big system 200 connects.
Specifically, the beam merging apparatus are as follows:
Wavelength division multiplexer or bundling device.
It will be appreciated by persons skilled in the art that wavelength division multiplexer is to believe the light carrier of two or more different wave lengths
It number merges together, and the optical carrier after converging is coupled to the device that same root optical fiber transmits.
Specifically, the central wavelength of the ultrashort pulse is in the operating wavelength range of the SMF101.
Specifically, first gain fibre are as follows:
Single-mode ytterbium-doping optical fiber (SM-YDF).
Those skilled in the art are it is understood that Yb dosed optical fiber refers to the optical fiber for mixing ytterbium (Yb+) ion in fibre core.Mix ytterbium
For optical fiber after absorbing pump light, ytterbium ion is excited to metastable energy level, by realizing more ultrashort pulse function after stimulated radiation
The amplification of rate.
Specifically, the first large mode field gain fibre, the i-th large mode field gain fibre and the N large mode field increase
Beneficial optical fiber is equal are as follows:
Large mode field Yb dosed optical fiber (LMA-YDF).
Specifically, the optical fiber laser are as follows: Totally positive dispersion cavity Active Mode-locked Fiber Laser.
It is specifically described below by the super continuum source for including three-level auxiliary amplifying device.
The pulse for the ultrashort pulse that Totally positive dispersion cavity Active Mode-locked Fiber Laser in seed source system 100 generates is as schemed
Shown in 3, a pulse is generated every the 65.2 nanoseconds laser, the width of pulse is about 20.4 picoseconds, repetition rate 15.33
Megahertz, for spectral centroid wavelength between for 1059 nanometers~1067 nanometers, three dB bandwidth is about 3.4 nanometers, and power is about 10 millis
Watt.
Seed source system 100 is connect by the SMF101 that one end is about 1.19km with the beam merging apparatus of amplification system 200,
The model XP-1060 of SMF101, ultrashort pulse are transmitted in SMF, introduce high-chip, ultrashort pulse is by auxiliary amplification
After system 220, it is transported to main amplification subsystem 210, main amplification subsystem is master oscillation power amplification (MOPA) system.
The first auxiliary amplification system in amplification subsystem 220 is assisted to use wavelength division multiplexer by ultrashort pulse and SM-LD
The pump light of generation carries out conjunction beam, and the power of SM-LD is 450 milliwatts, and the central wavelength for generating pump light is 975 nanometers, passes through
The pulse that wavelength division multiplexer closes beam is delivered to the first isolator by the first SM-YDF, and the core diameter of SM-YDF is 6 microns, packet
Outer layer diameter is 125 microns.The pump power of first order auxiliary amplifying device is 300 milliwatts.
The pump that second level auxiliary amplifying device generates the ultrashort pulse received by the second bundling device and the 2nd MM-LD
Pu light carries out conjunction beam, and the pulse after closing beam is delivered to the second pump light stripper, the second pumping photospallation by the 2nd LMA-YDF
The pulse received is delivered to the second isolator by device；Wherein, the power of the 2nd MM-LD is 9 watts, generates the middle cardiac wave of pump light
A length of 915 nanometers, the core diameter of the 2nd LMA-YDF is 10 microns, and packet outer layer diameter is 130 microns.Second level auxiliary amplification
The pump power of device is 820 milliwatts.
The pump that third level auxiliary amplifying device generates the ultrashort pulse received by third bundling device and the 3rd MM-LD
Pu light carries out conjunction beam, and the pulse after closing beam is delivered to third pump light stripper by the 3rd LMA-YDF, and third pumps photospallation
The pulse received is delivered to third isolator by device；Wherein, the power of the 3rd MM-LD is 25 watts, generates the center of pump light
Wavelength is 975 nanometers, and the core diameter of the 2nd LMA-YDF is 15 microns, and packet outer layer diameter is 130 microns.Third level auxiliary is put
The pump power of big device is 2.2 watts.Power amplification by three-level amplifying device to ultrashort pulse, the power quilt of ultrashort pulse
It is amplified to about 280 milliwatts.
The first bundling device 211 in main amplification subsystem 210 is by the pulse received from third isolator and the first MM-
The pump light that LD213 is generated carries out conjunction beam, and the pulse after conjunction beam is delivered to the first pumping photospallation by the first LMA-YDF
Device 212 connects, and the pulse received is delivered to mould field adapter 301 by optical fiber by the first pump light stripper 212.Wherein,
The power of first MM-LD is 25 watts, and the central wavelength for generating pump light is 975 nanometers, and the quantity of the first MM-LD is 5, the
The core diameter of one LMA-YDF is 20 microns, and packet outer layer diameter is 130 microns.The pump power of main amplification subsystem 210 is about
98.6 watts.Power amplification by main amplification subsystem 210 to ultrashort pulse, the power of ultrashort pulse are amplified to about 63.3
Watt.
By the ultrashort pulse of amplification system amplification after mould field adapter 301 and PCF302, available 30.4 watts
Super continuous spectrums white light output, the spectral region of white light covers 385 nanometers~2400 nanometers.
Fig. 4 is that the output power of main amplification subsystem 210 and the output power of super continuum source change with pump power
Curve graph, it can be seen from the figure that with the increase of pump power, the output power of main amplification subsystem 210 and super continuous
The output power of spectrum light source can all increase, but the trend that the output power of super continuum source increases is less than main amplification subsystem
The trend that 210 output power increases.
By testing the light that super continuum source exports, obtained result as shown in figure 5, in figure, AQ6373 and
AQ6375 is respectively the model of spectroanalysis instrument.Super continuum source can generate the spectral coverage of ultra-wide: 385 nanometers~
2400 nanometers, and spectrum is relatively flat, the mean power of output is about 30.4 watts higher.
Using the embodiment of the present invention, amplification by amplification system to ultrashort pulse power can be improved mean power
Output.
Referring to Fig. 6, another kind super continuum source provided in an embodiment of the present invention, light source includes seed source system 100, is put
Big system 200 and white light generation system 300, wherein
The seed source system 100 includes at least optical fiber laser, is connect by SMF101 with the amplification system 200,
For generating ultrashort pulse；
The amplification system 200, including auxiliary amplification subsystem 220 and main amplification subsystem 210, being used for will be described ultrashort
The pump power of pulse amplifying, the auxiliary amplification subsystem is less than the pump power of main amplification subsystem；
Assisting amplification subsystem includes an auxiliary amplifying device, and the auxiliary amplifying device includes two pole of single-mode laser
Pipe, beam merging apparatus and isolator, the beam merging apparatus are passed through by the connection of isolator described in gain fibre, the beam merging apparatus
SMF101 is connect with the seed source system, and the isolator is connect by optical fiber with first bundling device.
The main amplification subsystem, comprising:
First MM-LD213, the first bundling device 211, the first pump light stripper 212, wherein first bundling device 211
It is connect by the first large mode field gain fibre with first pump light stripper 212, first bundling device 211 passes through optical fiber
It is connect with the first MM-LD213；
The white light generation system 300, including mould field adapter 301 and PCF302, for exporting super continuous spectrums white light,
In, the mould field adapter 301 is connect by optical fiber with first pump light stripper 212, the mould field adapter and institute
State PCF302 connection.
Specifically, the seed source system 200 further include:
Isolator, wherein the isolator is connect by SMF101 with the optical fiber laser, is put by optical fiber with described
Big system 200 connects.
Specifically, the beam merging apparatus are as follows:
Wavelength division multiplexer or bundling device.
Specifically, the central wavelength of the ultrashort pulse is in the operating wavelength range of the SMF101.
Specifically, first gain fibre are as follows:
SM-YDF。
Specifically, the first large mode field gain fibre, the i-th large mode field gain fibre and the N large mode field increase
Beneficial optical fiber is equal are as follows:
LMA-YDF。
Specifically, the optical fiber laser are as follows: Totally positive dispersion cavity Active Mode-locked Fiber Laser.
Using the embodiment of the present invention, amplification by amplification system to ultrashort pulse power can be improved mean power
Output.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
Each embodiment in this specification is all made of relevant mode and describes, same and similar portion between each embodiment
Dividing may refer to each other, and each embodiment focuses on the differences from other embodiments.Especially for device reality
For applying example, since it is substantially similar to the method embodiment, so being described relatively simple, related place is referring to embodiment of the method
Part explanation.
Those of ordinary skill in the art will appreciate that all or part of the steps in realization above method embodiment is can
It is completed with instructing relevant hardware by program, the program can store in computer-readable storage medium,
The storage medium designated herein obtained, such as: ROM/RIM, magnetic disk, CD.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the scope of the present invention.It is all
Any modification, equivalent replacement, improvement and so within the spirit and principles in the present invention, are all contained in protection scope of the present invention
It is interior.
Claims (9)
1. a kind of super continuum source, which is characterized in that the light source includes seed source system, and amplification system and white light generate system
System, wherein
The seed source system includes at least optical fiber laser, is connect by single mode optical fiber with the amplification system, for generating
Ultrashort pulse；
The amplification system includes at least main amplification subsystem, for amplifying the ultrashort pulse, the main amplification subsystem
System, comprising:
First multimode laser diode, the first bundling device, the first pump light stripper, wherein first bundling device passes through the
One large mode field gain fibre is connect with first pump light stripper, and first bundling device passes through optical fiber and more than described first
The connection of mould laser diode；
The amplification system, further includes:
Amplification subsystem is assisted, the auxiliary amplification subsystem includes at least one level auxiliary amplifying device, auxiliary amplification
The pump power of system is less than the pump power of main amplification subsystem；
In the case where the auxiliary amplification subsystem includes N grades of auxiliary amplifying devices and N >=2, N grades of auxiliary amplifying devices
Pump power is greater than the pump power of N-1 grades of auxiliary amplifying devices；
The white light generation system, including mould field adapter and photonic crystal fiber, for exporting super continuous spectrums white light, wherein
The mould field adapter is connect by optical fiber with first pump light stripper, the mould field adapter and the photonic crystal
Optical fiber connection.
2. light source according to claim 1, which is characterized in that
First order auxiliary amplifying device, including single mode laser diode, beam merging apparatus and the first isolator, the beam merging apparatus are logical
It crosses the first gain fibre to connect with first isolator, the beam merging apparatus is connected by single mode optical fiber and the seed source system
It connects, first isolator is connect by optical fiber with second level amplifying device；
I-stage auxiliary amplifying device, including the i-th multimode laser diode, the i-th bundling device, the i-th pump light stripper and i-th every
From device, wherein i belongs to 2 to N-1, and i-th bundling device is connect by optical fiber with i-th multimode laser diode, and described the
I bundling device is connect by the i-th large mode field gain fibre with i-th pump light stripper, and i-th isolator passes through optical fiber point
It is not connect with i-th pump light stripper and the i+1 grade auxiliary amplifying device；
N grades of auxiliary amplifying devices, including N multimode laser diode, N bundling device, N pump light stripper and N every
From device, the N bundling device passes through N large mode field by optical fiber and the N multimode laser diode, the N bundling device
Gain fibre is connect with the N pump light stripper, and the N isolator pumps photospallation with the N respectively by optical fiber
Device is connected with first bundling device.
3. light source according to claim 1, which is characterized in that the auxiliary amplification subsystem include level-one auxiliary amplification dress
In the case where setting,
The auxiliary amplifying device includes single mode laser diode, beam merging apparatus and isolator, and the beam merging apparatus passes through gain
The connection of isolator described in optical fiber, the beam merging apparatus are connect by single mode optical fiber with the seed source system, and the isolator is logical
Optical fiber is crossed to connect with first bundling device.
4. light source according to any one of the claim 1 to 3, which is characterized in that the seed source system further include:
Isolator, wherein the isolator is connect by single mode optical fiber with the optical fiber laser, and optical fiber and the amplification are passed through
System connection.
5. the light source according to Claims 2 or 3, which is characterized in that the beam merging apparatus are as follows:
Wavelength division multiplexer or bundling device.
6. light source according to any one of the claim 1 to 3, which is characterized in that the central wavelength of the ultrashort pulse is described
In the operating wavelength range of single mode optical fiber.
7. light source according to claim 2, which is characterized in that first gain fibre are as follows:
Single-mode ytterbium-doping optical fiber.
8. light source according to claim 2, which is characterized in that the first large mode field gain fibre, i-th large mode field increase
Beneficial optical fiber and the N large mode field gain fibre are equal are as follows:
LMA-YDF。
9. according to any one of right 1 to 3 light source, which is characterized in that the optical fiber laser are as follows:
Totally positive dispersion cavity Active Mode-locked Fiber Laser.
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| CN106785834A (en) * | 2016-12-12 | 2017-05-31 | 武汉长进激光技术有限公司 | Super continuum source based on noise like mode locking pulse pumping |
| CN106785839A (en) * | 2016-12-16 | 2017-05-31 | 中国电子科技集团公司电子科学研究院 | A kind of optical fiber laser with super continuous spectrum |
| CN106785865A (en) * | 2016-12-22 | 2017-05-31 | 北京大学深圳研究生院 | A kind of super continuum light composes generation device |
| CN109818241B (en) * | 2019-01-14 | 2023-11-17 | 中国工程物理研究院激光聚变研究中心 | High-power supercontinuum laser system |
| CN110243494A (en) * | 2019-06-03 | 2019-09-17 | 太原理工大学 | Temperature measuring device for high-voltage cable and method based on the single-ended BOTDA of super continuum source |
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| CN101447636A (en) * | 2008-11-20 | 2009-06-03 | 中国科学院物理研究所 | Method for generating white light with high steadiness and super-continuum used for ultra-fast photoparametric amplifier |
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