CN106816807A - Optical fiber laser as pumping source intracavity pump optical parametric oscillator - Google Patents
Optical fiber laser as pumping source intracavity pump optical parametric oscillator Download PDFInfo
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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
- H01S3/09—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
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Abstract
The invention discloses a kind of optical fiber laser as pumping source intracavity pump optical parametric oscillator, laser in the pumping source transmitting single mode gain fibre absorption band of optical fiber laser, enter single mode gain fibre after bundling device, population inversion is formed, and laser generation is formed in resonant cavity of fibre-optical laser；Nonlinear crystal is placed in resonant cavity of fibre-optical laser, and the laser vibrated in chamber can produce OPO flashlights and OPO ideler frequency lights by nonlinear crystal；The resonator of OPO flashlights partially overlaps with resonant cavity of fibre-optical laser, can be effectively reduced the oscillation threshold of OPO and improve power conversion efficiency.Be placed in nonlinear crystal between a pair of curved mirrors by the present invention, and it is long to increase the chamber of OPO signal optical cavities using output coupling mirror and high reflective mirror, the facula area of OPO signals and pump light in nonlinear crystal can be reduced, the purpose for further reducing OPO oscillation thresholds is reached；The oscillation threshold of OPO can be effectively reduced, the power conversion efficiency and simple structure of OPO is improved.
Description
Technical field
The present invention relates to optical parametric oscillator field, more particularly, to a kind of optical fiber laser as pumping source chamber
Inside-pumping optical parametric oscillator.
Background technology
Optical parametric oscillator (OPO) utilizes second order nonlinear effect, and by incident laser, referred to as pump light is converted to two frequencies
The different shoot laser of rate, one of frequency the higher person is referred to as flashlight, another frequency lower referred to as ideler frequency light, pumping
The frequency of light is equal to the frequency sum of flashlight and ideler frequency light；Optical parametric oscillator is used to expand the output waveband of laser emission,
Realize the laser emission of wideband adjustable.
Continuous wave single-resonant optical parametric oscillator is typically using fiber amplifier as pumping source；Using cycle pole more long
The nonlinear crystal of change, such as period polarized lithium columbate crystal (PPLN), as gain media to reduce oscillation threshold, now
Oscillation threshold is generally 2W or so；When pump power is 10W, the ideler frequency luminous power of output is about 1W.Typical continuous wave list
The configuration of the optical parametric oscillator of resonance and experimental result such as document E.Andrieux, T.Zanon, M.Cadoret, A.Rihan,
And J.-J.Zondy, " 500GHz mode-hop-free idler tuning range with a frequency-
Stabilized singly resonant optical parametric oscillator, " Opt.Lett.36,1212-
Shown in 1214 (2011).
The structure of this kind of single-resonant optical parametric oscillator is relative complex, and when using continuous wave pumping source, oscillation threshold is inclined
High, conversion efficiency is low.Optical parametric oscillator is placed in the resonator of laser, the vibration threshold of optical parametric oscillator can be reduced
Value, and improve nonlinear conversion efficiency；Without using optoisolator element, thus structure is relatively easy.
The content of the invention
For the defect of prior art, it is an object of the invention to provide a kind of chamber using optical fiber laser as pumping source
Inside-pumping single-resonant optical parametric oscillator, it is intended to solve that prior art oscillation threshold is high, conversion efficiency is low and baroque ask
Topic.
The invention provides a kind of optical fiber laser as pumping source intracavity pump optical parametric oscillator, including：Pumping
Source, fiber grating speculum, single mode gain fibre, bundling device, collimation lens, polarizer, dichroic mirror, first surface mirror, non-thread
Property crystal and the second curved mirror；Laser in pumping source transmitting single mode gain fibre absorption band, increases after bundling device into single mode
Beneficial optical fiber simultaneously forms OPO pump lights；OPO pump lights are by the fiber grating speculum, single mode gain fibre, bundling device, standard
Laser generation is formed in the first resonator that straight lens, polarizer, dichroic mirror, first surface mirror and the second curved mirror are constituted；It is non-
Linear crystal is located in first resonator, and is arranged between the first surface mirror and second curved mirror；Institute
The laser for stating vibration in the first resonator can produce OPO flashlights and OPO ideler frequency lights by the nonlinear crystal；OPO signals
Vibration, the OPO are formed in the second resonator that light is constituted via the dichroic mirror, first surface mirror and second curved mirror
Ideler frequency light is exported respectively by the first surface mirror and second curved mirror.
The invention provides a kind of optical fiber laser as pumping source intracavity pump optical parametric oscillator, including：Pumping
Source, fiber grating speculum, single mode gain fibre, bundling device, collimation lens, polarizer, dichroic mirror, output coupling mirror, first
Curved mirror, nonlinear crystal and the second curved mirror；Laser in the pumping source transmitting single mode gain fibre absorption band, ECDC beam
Enter single mode gain fibre after device and form OPO pump lights；The OPO pump lights are by the fiber grating speculum, the list
Mould gain fibre, the bundling device, the collimation lens, the polarizer, the dichroic mirror, the first surface mirror and described
Laser generation is formed in the first resonator that second curved mirror is constituted；The nonlinear crystal is located in first resonator,
And be arranged between the first surface mirror and second curved mirror；The laser vibrated in first resonator is by institute
State nonlinear crystal and produce OPO flashlights and OPO ideler frequency lights；The OPO flashlights are by the output coupling mirror, described double-colored
Vibration is formed in the 3rd resonator that mirror, the first surface mirror and second curved mirror are constituted, the OPO flashlights pass through
The output coupling mirror output, the OPO ideler frequency lights are exported respectively by the first surface mirror and second curved mirror.
The invention provides a kind of optical fiber laser as pumping source intracavity pump optical parametric oscillator, including：Pumping
Source, fiber grating speculum, single mode gain fibre, bundling device, collimation lens, polarizer, dichroic mirror, first surface mirror, non-thread
Property crystal, the second curved mirror and high reflective mirror；Laser in pumping source transmitting single mode gain fibre absorption band, enters after bundling device
Single mode gain fibre forms OPO pump lights；The OPO pump lights are by the fiber grating speculum, the single mode gain light
Fine, described bundling device, the collimation lens, the polarizer, the dichroic mirror, the first surface mirror, second curved surface
Laser generation is formed in the 4th resonator that mirror and the high reflective mirror are constituted；The nonlinear crystal is located at the 4th resonator
It is interior, and be arranged between the first surface mirror and second curved mirror；The laser warp vibrated in the 4th resonator
Cross the nonlinear crystal and produce OPO flashlights and OPO ideler frequency lights；The OPO flashlights are by the dichroic mirror, described first
Vibration is formed in the 5th resonator that curved mirror, second curved mirror and the high reflective mirror are constituted, the OPO ideler frequency lights are passed through
The first surface mirror and second curved mirror are exported respectively.
The invention provides a kind of optical fiber laser as pumping source intracavity pump optical parametric oscillator, including：Pumping
Source, fiber grating speculum, single mode gain fibre, bundling device, collimation lens, polarizer, dichroic mirror, output coupling mirror, first
Curved mirror, nonlinear crystal, the second curved mirror and high reflective mirror；Swashing in the pumping source transmitting single mode gain fibre absorption band
Light, enters single mode gain fibre formation OPO pump lights after the bundling device；OPO pump lights reflect by the fiber grating
Mirror, single mode gain fibre, bundling device, collimation lens, polarizer, dichroic mirror, first surface mirror, the second curved mirror and the height are anti-
Laser generation is formed in the 4th resonator that mirror is constituted；Nonlinear crystal is located in the 4th resonator, and is arranged on described
Between first surface mirror and second curved mirror；The laser vibrated in the 4th resonator is by the nonlinear crystal
Produce OPO flashlights and ideler frequency light；The OPO flashlights are by the output coupling mirror, the dichroic mirror, the first surface
Vibration is formed in the 6th resonator that mirror, the nonlinear crystal, second curved mirror and the high reflective mirror are constituted, it is described
OPO flashlights are exported by the output coupling mirror, and the OPO ideler frequency lights are by the first surface mirror and second curved surface
Mirror is exported respectively.
In the present invention, fiber grating speculum provides OPO pump lights (laser i.e. produced by optical fiber laser) high anti-
Penetrate；Output coupling mirror plating OPO flashlights anti-or part reflectance coating high；Dichroic mirror plating OPO pump lights are anti-reflection, flashlight high-reflecting film；
First surface mirror and the second curved mirror plating OPO pump lights and flashlight anti-, ideler frequency light anti-reflection film high；Nonlinear crystal plates OPO pumps
Pu, signal and ideler frequency light anti-reflection film；High reflective mirror plates OPO pumpings and flashlight high-reflecting film；The reflectivity of high-reflecting film reach 99% or
More than, the transmissivity of anti-reflection film reaches 90% or more.
Realize OPO signals and pump light in nonlinear crystal using the purpose of first surface mirror and the second curved mirror
Focus on, to reduce the oscillation threshold of OPO；The chamber for increasing OPO signal optical cavities using output coupling mirror and high reflective mirror is long, it is therefore an objective to
The facula area of OPO signals and pump light in nonlinear crystal is further reduced, the oscillation threshold of OPO is further reduced.
Further, pumping source is semiconductor laser, solid state laser or the optical fiber laser of single mode or multimode.
Further, single mode gain fibre is to mix Nd, mix Yb, mix Er, mix Tm or mix single covering or double clad light of Ho
It is fine.
Further, bundling device is wavelength-division multiplex bundling device, pump combiner or laser bundling device.
Further, collimation lens is used to realize to the collimation of optical-fiber laser and realization and OPO pump cavities space
The matching of pattern.
Further, polarizer is used to select the laser polarization direction of optical fiber laser, meets the nonlinear crystal
Requirement to pumping light polarization.
Further, nonlinear crystal be period polarized lithium columbate crystal, potassium titanyl oxygenic phosphate(KTP) crystal or other can produce
The crystal of raw non-linear gain.
Compared with prior art, the present invention has following beneficial effect：
(1) compared with the optical parametric oscillator of pumping outside existing chamber, OPO is placed in the resonator of optical fiber laser,
So that OPO pump lights vibrate in OPO signal optical cavities, the oscillation threshold of OPO is reduced；Improve the power conversion of OPO
Efficiency；Without using optoisolator element, thus structure is relatively easy.
(2) compared with the optical parametric oscillator of existing intracavity pump, can provide more excellent using optical fiber laser
Beam quality and power conversion efficiency higher.
(3) OPO is placed in the resonator of optical fiber laser, due to the coupling loss of free space optical elements to optical fiber
It is larger, cause the Q values of resonant cavity of fibre-optical laser relatively low, the power density in laser resonant cavity is only carried than having outside chamber on a small quantity
Height, thus the oscillation threshold that OPO is placed in into OPO when in resonant cavity of fibre-optical laser is still higher；The present invention passes through will be non-linear
Crystal is placed between a pair of curved mirrors, and it is long to increase the chamber of OPO signal optical cavities using output coupling mirror and high reflective mirror, to reduce
The facula area of OPO signals and pump light in nonlinear crystal, reaches the purpose for further reducing OPO oscillation thresholds.
Brief description of the drawings
Fig. 1 is that the structure of the optical fiber laser intracavity pump single-resonant optical parametric oscillator that the embodiment of the present invention 1 is provided is shown
It is intended to.
Fig. 2 is that the structure of the optical fiber laser intracavity pump single-resonant optical parametric oscillator that the embodiment of the present invention 2 is provided is shown
It is intended to.
Fig. 3 is that the structure of the optical fiber laser intracavity pump single-resonant optical parametric oscillator that the embodiment of the present invention 3 is provided is shown
It is intended to.
Fig. 4 is that the structure of the optical fiber laser intracavity pump single-resonant optical parametric oscillator that the embodiment of the present invention 4 is provided is shown
It is intended to.
Wherein, 1 is the pumping source of optical fiber laser, and 2 is fiber grating speculum, and 3 is single mode gain fibre, 4 is conjunction beam
Device, 5 be collimation lens, 6 be polarizer, 7 be dichroic mirror, 8 be output coupling mirror, 9 be first surface mirror, 10 be non-linear crystalline substance
Body, 11 be the second curved mirror, 12 be high reflective mirror.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
As shown in figure 4, in the present invention, using optical fiber laser as the intracavity pump single resonance optical parametric oscillation of pumping source
Device, intracavity pump single-resonant optical parametric oscillator includes：The pumping source 1 of optical fiber laser, fiber grating speculum 2, single mode increase
Beneficial optical fiber 3, bundling device 4, collimation lens 5, polarizer 6, dichroic mirror 7, output coupling mirror 8, first surface mirror 9, nonlinear crystal
10th, the second curved mirror 11 and high reflective mirror 12, wherein,
Fiber grating speculum 2 provides high reflection to OPO pump lights (laser i.e. produced by optical fiber laser)；Output coupling
Close the plating OPO flashlights anti-or part reflectance coating high of mirror 8；The plating OPO pump lights of dichroic mirror 7 are anti-reflection, flashlight high-reflecting film；First surface
The plated film of 9 and second curved mirror of mirror 11, this film is high to OPO pump lights and flashlight anti-, anti-reflection to ideler frequency light；Nonlinear crystal 10 is plated
OPO pumpings, signal and ideler frequency light anti-reflection film；High reflective mirror 12 plates OPO pumpings and flashlight high-reflecting film；The reflection of high-reflecting film here
Rate reaches 99% or more, and the transmissivity of anti-reflection film reaches 90% or more.
Laser in the absorption band of the transmitting single mode of pumping source 1 gain fibre 3 of optical fiber laser, enters single after bundling device 4
Mould gain fibre 3；OPO pump lights are by fiber grating speculum 2, single mode gain fibre 3, bundling device 4, collimation lens 5, polarization
The optical fiber laser that piece 6, dichroic mirror 7, first surface mirror 9, nonlinear crystal 10, the second curved mirror 11 and high reflective mirror 12 are constituted is humorous
Shake and laser generation is formed in chamber；The laser vibrated in chamber can produce the increasing of OPO flashlights and ideler frequency light by nonlinear crystal 10
Benefit；OPO flashlights are by output coupling mirror 8, dichroic mirror 7, first surface mirror 9, nonlinear crystal 10, the second curved mirror 11 and height
Vibration is formed in the resonator that anti-mirror 12 is constituted, the OPO flashlights of generation are exported by the output coupling mirror, the OPO of generation
Ideler frequency light is exported by first surface mirror and the second curved mirror；It is to realize using the purpose of first surface mirror and the second curved mirror
The focusing of OPO signals and pump light in the nonlinear crystal, to reduce the oscillation threshold of OPO；Using output coupling mirror and
High reflective mirror is long to increase the chamber of OPO signal optical cavities, it is therefore an objective to further reduce OPO signals and pump light in the nonlinear crystal
Interior facula area, further to reduce the oscillation threshold of OPO.
In embodiments of the present invention, the pumping source of optical fiber laser is specifically as follows semiconductor laser, solid state laser
Or optical fiber laser；Single mode gain fibre is specifically as follows：Nd is mixed, Yb is mixed, is mixed Er, mixes Tm or mix single covering or double clad of Ho
Optical fiber.Bundling device is specifically as follows：Wavelength-division multiplex bundling device or pumping/laser bundling device.Collimation lens is used to realize to optical fiber
The collimation of laser, and for realizing being matched with OPO pump cavity spatial models.Polarizer is used to select optical fiber laser
Laser polarization direction, meets requirement of the nonlinear crystal to pumping light polarization.Nonlinear crystal can be period polarized niobic acid
Crystalline lithium, potassium titanyl oxygenic phosphate(KTP) crystal or other can produce the crystal of non-linear gain.
Wherein, fiber grating speculum provides high reflection to OPO pump lights；Output coupling mirror plating OPO flashlights it is high anti-or
Part reflectance coating；Dichroic mirror plating OPO pump lights are anti-reflection, flashlight high-reflecting film；First surface mirror and the second curved mirror plating identical
Film, this film is high to OPO pump lights and flashlight anti-, anti-reflection to ideler frequency light；The plated film of nonlinear crystal 10, this film be to OPO pumpings,
The anti-reflection film of signal and ideler frequency light；High reflective mirror 12 plates the high-reflecting film to OPO pumpings and flashlight.
In embodiments of the present invention, when single mode gain fibre 3 is using Yb-doped fiber, the pumping source 1 of optical fiber laser can
Wavelength is used for 976 nanometers of semiconductor laser, the reflection wavelength of fiber grating speculum 2 is 1064 nanometers, then optical fiber swashs
The wavelength of the wavelength of light device, i.e. OPO pump lights is 1064 nanometers；Nonlinear crystal 10 can select PPLN, when the polarization of PPLN
When cycle is 30.8 microns, the wavelength of flashlight and ideler frequency light is respectively 1570 nanometers and 3306 nanometers；By changing optical fiber light
The reflection wavelength of grid speculum 2 or the polarization cycle or temperature of change PPLN, it is possible to achieve to OPO output signal lights and ideler frequency light
The tuning of wavelength.
In embodiments of the present invention, single mode gain fibre 3 can be mixed Nd, mix Yb, mix Er, mix Tm or mix single covering of Ho
Or doubly clad optical fiber.Because different doping can be operated in different wavelength, wavelength that so can be as needed selects to fit
The doped dielectric answered.For the selection of single covering or doubly clad optical fiber, pumping source is to rely on, when pumping source 1 for single mode swashs
During light device, single mode gain fibre 3 is single cladded-fiber, and bundling device 4 is wavelength-division multiplex bundling device；When the multimode laser of pumping source 1
When, single mode gain fibre 3 is doubly clad optical fiber, and bundling device 4 is multimode pumping/laser bundling device.No matter so pumping source is single
Mould or multimode laser, are suitable for experiment.
In embodiments of the present invention, the pumping source 1 of optical fiber laser can realize grain in single mode gain fibre 3
The single mode of subnumber reversion or the semiconductor laser of multimode, solid state laser or optical fiber laser.
In embodiments of the present invention, collimation lens 5 is used for collimation of the realization to optical-fiber laser, and for realizing and OPO pumps
The matching of Pu resonator spatial model so that in space, relative to lens, image is conjugated two coaxial Gaussian beams each other
Relation.
In embodiments of the present invention, polarizer 6 is used to select the laser polarization direction of optical fiber laser, and polarization direction needs
It is consistent with the required direction of nonlinear crystal, to meet requirement of the nonlinear crystal to pumping light polarization.
In embodiments of the present invention, nonlinear crystal 10 can be period polarized lithium columbate crystal, potassium titanium oxide phosphate crystalline substance
Body or other can produce the crystal of non-linear gain.Periodically poled lithium niobate crystal (PPLN crystal) is that a kind of efficient wavelength turns
The non-linear crystal for changing, transparency range is wide, 0.4~4.5 micron of interval, covers near, mid infrared region, and long service life can
Amplify for frequency multiplication, difference frequency and frequency and optical parametric oscillator and optical parameter etc..Potassium titanium oxide phosphate (KTP) crystal is a kind of tool
There is excellent nonlinear optical property, obtained the nonlinear optical crystal of extensive attention and application, ktp crystal is positive photosensitiveness
Twin crystal, its transmission region be 350nm~4.5um, it is possible to achieve 1.064um neodymium ions laser and its all band laser freuqency doubling and
Frequently, the non-colinear position of optical parametric oscillation.
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only used for explaining the present invention, not
For limiting the present invention.As long as additionally, technical characteristic involved in invention described below each implementation method that
Conflict is not constituted between this can be just mutually combined.
In order to further description optical fiber laser provided in an embodiment of the present invention is used as the intracavity pump light of pumping source
Parametric oscillator, with reference to instantiation and accompanying drawing, the present invention is described in further detail.
As shown in figure 1, the optical fiber laser intracavity pump single-resonant optical parametric oscillator bag that the embodiment of the present invention 1 is provided
Include：The pumping source 1 of optical fiber laser, fiber grating speculum 2, single mode gain fibre 3, bundling device 4, collimation lens 5, polarizer
6th, dichroic mirror 7, first surface mirror 9, the curved mirror 11 of nonlinear crystal 10 and second；The pumping source 1 of wherein optical fiber laser is launched
Laser in the absorption band of single mode gain fibre 3, enters single mode gain fibre 3 after bundling device 4, and the pumping of OPO is formed herein
Light；OPO pump lights are by fiber grating speculum 2, single mode gain fibre 3, bundling device 4, collimation lens 5, polarizer 6, double-colored
Laser is formed in the resonant cavity of fibre-optical laser that mirror 7, first surface mirror 9,10 and second curved mirror of nonlinear crystal 11 are constituted to shake
Swing；The laser vibrated in chamber can produce OPO flashlights and ideler frequency light by nonlinear crystal 10；OPO flashlights are by dichroic mirror
7th, vibration, the OPO ideler frequencies of generation are formed in the resonator that first surface mirror 9,10 and second curved mirror of nonlinear crystal 11 are constituted
Light is exported by first surface mirror and the second curved mirror.
Compared with the optical parametric oscillator of existing intracavity pump, using the intracavity pump optical parameter based on optical fiber laser
Oscillator can provide more excellent beam quality and power conversion efficiency higher；However, OPO is placed in into optical fiber laser
In resonator, because the coupling loss of free space optical elements to optical fiber is larger, cause the Q values of resonant cavity of fibre-optical laser partially
It is low；Thus compared with the optical parametric oscillator of pumping outside chamber, OPO is placed in laser resonant cavity can only be reduced by a small margin
The oscillation threshold of OPO, the facula area of OPO signals and pump light in nonlinear crystal can be reduced with curved mirror, reached
Further reduce the purpose of OPO oscillation thresholds；Now the second curved mirror 11 is used as the end of OPO flashlights and pumping optical cavity
Mirror, and dichroic mirror 7 is used as another end mirror of OPO signal optical cavities.
As shown in Fig. 2 the optical fiber laser intracavity pump single-resonant optical parametric oscillator bag that the embodiment of the present invention 2 is provided
Include：The pumping source 1 of optical fiber laser, fiber grating speculum 2, single mode gain fibre 3, bundling device 4, collimation lens 5, polarizer
6th, dichroic mirror 7, output coupling mirror 8, first surface mirror 9, the curved mirror 11 of nonlinear crystal 10 and second；Wherein, optical fiber laser
The absorption band of the transmitting of pumping source 1 single mode gain fibre 3 in laser, single mode gain fibre 3 is entered after bundling device 4, herein
Form the pump light of OPO；OPO pump lights by fiber grating speculum 2, single mode gain fibre 3, bundling device 4, collimation lens 5,
The resonant cavity of fibre-optical laser that polarizer 6, dichroic mirror 7, first surface mirror 9,10 and second curved mirror of nonlinear crystal 11 are constituted
Interior formation laser generation；The laser vibrated in chamber can produce the gain of OPO flashlights and ideler frequency light by nonlinear crystal 10；
OPO flashlights are constituted by output coupling mirror 8, dichroic mirror 7, first surface mirror 9, the curved mirror 11 of nonlinear crystal 10 and second
Vibration is formed in resonator, the OPO flashlights of generation are exported by the output coupling mirror, the OPO ideler frequency lights of generation are by the
One curved mirror and the second curved mirror are exported.
Compared with Example 1, output coupling mirror 8 is added, now the second curved mirror 11 is humorous with pump light as OPO flashlights
Shake the end mirror in chamber.The chamber that the present invention increases OPO signal optical cavities using output coupling mirror is long, can reduce OPO signals and pumping
Facula area of the light in nonlinear crystal, reaches the purpose for further reducing OPO oscillation thresholds.
As shown in figure 3, the optical fiber laser intracavity pump single-resonant optical parametric oscillator bag that the embodiment of the present invention 3 is provided
Include：The pumping source 1 of optical fiber laser, fiber grating speculum 2, single mode gain fibre 3, bundling device 4, collimation lens 5, polarizer
6th, dichroic mirror 7, first surface mirror 9, nonlinear crystal 10, the second curved mirror 11 and high reflective mirror 12；The wherein pump of optical fiber laser
The laser in the absorption band of single mode gain fibre 3 is launched in Pu source 1, and single mode gain fibre 3 is entered after bundling device 4, is formed herein
The pump light of OPO；OPO pump lights are by fiber grating speculum 2, single mode gain fibre 3, bundling device 4, collimation lens 5, polarization
The optical fiber laser that piece 6, dichroic mirror 7, first surface mirror 9, nonlinear crystal 10, the second curved mirror 11 and high reflective mirror 12 are constituted is humorous
Shake and laser generation is formed in chamber；The laser vibrated in chamber can produce the increasing of OPO flashlights and ideler frequency light by nonlinear crystal 10
Benefit；OPO flashlights are being made up of dichroic mirror 7, first surface mirror 9, nonlinear crystal 10, the second curved mirror 11 and high reflective mirror 12
Vibration is formed in resonator, the OPO ideler frequency lights of generation are exported by first surface mirror and the second curved mirror.
Compared with Example 1, high reflective mirror 12 is added, now dichroic mirror 7 is used as the end mirror of OPO signal optical cavities.This hair
The bright chamber for increasing OPO signal optical cavities using high reflective mirror is long, can reduce the light of OPO signals and pump light in nonlinear crystal
Spot area, reaches the purpose for further reducing OPO oscillation thresholds.
As shown in figure 4, the optical fiber laser intracavity pump single-resonant optical parametric oscillator bag that the embodiment of the present invention 4 is provided
Include：The pumping source 1 of optical fiber laser, fiber grating speculum 2, single mode gain fibre 3, bundling device 4, collimation lens 5, polarizer
6th, dichroic mirror 7, output coupling mirror 8, first surface mirror 9, nonlinear crystal 10, the second curved mirror 11 and high reflective mirror 12；Wherein, light
Laser in the absorption band of the transmitting single mode of pumping source 1 gain fibre 3 of fibre laser, enters single mode gain fibre after bundling device 4
3, the pump light of OPO is formed herein；OPO pump lights are by fiber grating speculum 2, single mode gain fibre 3, bundling device 4, standard
What straight lens 5, polarizer 6, dichroic mirror 7, first surface mirror 9, nonlinear crystal 10, the second curved mirror 11 and high reflective mirror 12 were constituted
Laser generation is formed in resonant cavity of fibre-optical laser；The laser vibrated in chamber can produce OPO flashlights by nonlinear crystal 10
With the gain of ideler frequency light；OPO flashlights are by output coupling mirror 8, dichroic mirror 7, first surface mirror 9, nonlinear crystal 10, second
Vibration is formed in the resonator that curved mirror 11 and high reflective mirror 12 are constituted, the OPO flashlights of generation are defeated by the output coupling mirror
Go out, the OPO ideler frequency lights of generation are exported by first surface mirror and the second curved mirror.
Compared with Example 1, high reflective mirror 12 and output coupling mirror 8 are added, the present invention utilizes output coupling mirror and high reflective mirror
Chamber to increase OPO signal optical cavities is long, can reduce the facula area of OPO signals and pump light in nonlinear crystal, reaches
Further reduce the purpose of OPO oscillation thresholds.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of several preferred embodiments.The foregoing is only this
The preferred embodiment of invention, is not intended to limit the invention, it is all made within the spirit and principles in the present invention it is any
Modification, equivalent and improvement etc., should be included within the scope of the present invention.
Claims (10)
1. a kind of optical fiber laser as pumping source intracavity pump optical parametric oscillator, it is characterised in that including：Pumping source
(1), fiber grating speculum (2), single mode gain fibre (3), bundling device (4), collimation lens (5), polarizer (6), dichroic mirror
(7), first surface mirror (9), nonlinear crystal (10) and the second curved mirror (11)；
Laser in pumping source (1) the transmitting single mode gain fibre absorption band, enters the single mode after the bundling device (4)
Gain fibre (3) simultaneously forms OPO pump lights；
The OPO pump lights are by the fiber grating speculum (2), single mode gain fibre (3), bundling device (4), collimation lens
(5), formed in the first resonator that polarizer (6), dichroic mirror (7), first surface mirror (9) and the second curved mirror (11) are constituted and swashed
Light generation；
The nonlinear crystal (10) is arranged on the first surface mirror (9) and described in first resonator
Between two curved mirrors (11)；The laser vibrated in first resonator can produce OPO by the nonlinear crystal (10)
Flashlight and OPO ideler frequency lights；
The OPO flashlights are constituted via the dichroic mirror (7), the first surface mirror (9) and second curved mirror (11)
The second resonator in formed vibration, the OPO ideler frequency lights are by the first surface mirror (9) and second curved mirror (11)
Export respectively.
2. a kind of optical fiber laser as pumping source intracavity pump optical parametric oscillator, it is characterised in that including：Pumping source
(1), fiber grating speculum (2), single mode gain fibre (3), bundling device (4), collimation lens (5), polarizer (6), dichroic mirror
(7), output coupling mirror (8), first surface mirror (9), nonlinear crystal (10) and the second curved mirror (11)；
Laser in pumping source (1) the transmitting single mode gain fibre absorption band, enters single mode gain fibre after bundling device (4)
(3) OPO pump lights are formed；
The OPO pump lights by the fiber grating speculum (2), the single mode gain fibre (3), the bundling device (4),
The collimation lens (5), the polarizer (6), the dichroic mirror (7), the first surface mirror (9) and second curved mirror
(11) laser generation is formed in the first resonator for constituting；
The nonlinear crystal (10) is arranged on the first surface mirror (9) and described in first resonator
Between two curved mirrors (11)；The laser vibrated in first resonator produces OPO to believe by the nonlinear crystal (10)
Number light and OPO ideler frequency lights；
The OPO flashlights are by the output coupling mirror (8), the dichroic mirror (7), the first surface mirror (9) and described
Vibration is formed in the 3rd resonator that second curved mirror (11) is constituted, the OPO flashlights are defeated by the output coupling mirror (8)
Go out, the OPO ideler frequency lights are exported respectively by the first surface mirror (9) and second curved mirror (11).
3. a kind of optical fiber laser as pumping source intracavity pump optical parametric oscillator, it is characterised in that including：Pumping source
(1), fiber grating speculum (2), single mode gain fibre (3), bundling device (4), collimation lens (5), polarizer (6), dichroic mirror
(7), first surface mirror (9), nonlinear crystal (10), the second curved mirror (11) and high reflective mirror (12)；
Laser in pumping source (1) the transmitting single mode gain fibre absorption band, enters single mode gain fibre after bundling device (4)
(3) OPO pump lights are formed；
The OPO pump lights by the fiber grating speculum (2), the single mode gain fibre (3), the bundling device (4),
The collimation lens (5), the polarizer (6), the dichroic mirror (7), the first surface mirror (9), second curved mirror
(11) and in the 4th resonator of the high reflective mirror (12) composition laser generation is formed；
The nonlinear crystal (10) is arranged on the first surface mirror (9) and described in the 4th resonator
Between two curved mirrors (11)；The laser vibrated in the 4th resonator produces OPO to believe by the nonlinear crystal (10)
Number light and OPO ideler frequency lights；
The OPO flashlights are by the dichroic mirror (7), the first surface mirror (9), second curved mirror (11) and described
Vibration is formed in the 5th resonator that high reflective mirror (12) is constituted, the OPO ideler frequency lights are by the first surface mirror (9) and described
Second curved mirror (11) is exported respectively.
4. a kind of optical fiber laser as pumping source intracavity pump optical parametric oscillator, it is characterised in that including：Pumping source
(1), fiber grating speculum (2), single mode gain fibre (3), bundling device (4), collimation lens (5), polarizer (6), dichroic mirror
(7), output coupling mirror (8), first surface mirror (9), nonlinear crystal (10), the second curved mirror (11) and high reflective mirror (12)；
Laser in pumping source (1) the transmitting single mode gain fibre absorption band, enters single mode gain after the bundling device (4)
Optical fiber (3) forms OPO pump lights；
The OPO pump lights by the fiber grating speculum (2), the single mode gain fibre (3), the bundling device (4),
The collimation lens (5), the polarizer (6), the dichroic mirror (7), the first surface mirror (9), second curved mirror
(11) and in the 4th resonator of the high reflective mirror (12) composition laser generation is formed；
The nonlinear crystal (10) is arranged on the first surface mirror (9) and described in the 4th resonator
Between two curved mirrors (11)；The laser vibrated in the 4th resonator produces OPO to believe by the nonlinear crystal (10)
Number light and ideler frequency light；
The OPO flashlights are by the output coupling mirror (8), the dichroic mirror (7), the first surface mirror (9), described non-
Vibration is formed in the 6th resonator that linear crystal (10), second curved mirror (11) and the high reflective mirror (12) are constituted,
The OPO flashlights are exported by the output coupling mirror (8), and the OPO ideler frequency lights are by the first surface mirror (9) and institute
The second curved mirror (11) is stated to export respectively.
5. the intracavity pump optical parametric oscillator as described in claim any one of 1-4, it is characterised in that the pumping source (1)
It is the semiconductor laser of single mode or multimode, solid state laser or optical fiber laser.
6. the intracavity pump optical parametric oscillator as described in claim any one of 1-4, it is characterised in that the single mode gain light
Fine (3) are to mix Nd, mix Yb, mix Er, mix Tm or mix single covering or doubly clad optical fiber of Ho.
7. the intracavity pump optical parametric oscillator as described in claim any one of 1-4, it is characterised in that the bundling device (4)
It is wavelength-division multiplex bundling device, pump combiner or laser bundling device.
8. the intracavity pump optical parametric oscillator as described in claim any one of 1-4, it is characterised in that the collimation lens
(5) for realizing to the collimation of optical-fiber laser and realizing being matched with OPO pump cavity spatial models.
9. the intracavity pump optical parametric oscillator as described in claim any one of 1-4, it is characterised in that the polarizer (6)
Laser polarization direction for selecting optical fiber laser, meets requirement of the nonlinear crystal to pumping light polarization.
10. the intracavity pump optical parametric oscillator as described in claim any one of 1-4, it is characterised in that the non-linear crystalline substance
Body (10) be period polarized lithium columbate crystal, potassium titanyl oxygenic phosphate(KTP) crystal or other can produce the crystal of non-linear gain.
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| CN107104352A (en) * | 2017-06-28 | 2017-08-29 | 中国工程物理研究院激光聚变研究中心 | Optical fiber laser and optical system |
| CN107994453A (en) * | 2017-12-29 | 2018-05-04 | 西南大学 | The Yb of laser diode-pumped tungsten disulfide tune Q：GYSO all solid state lasers |
| CN109687274A (en) * | 2019-01-18 | 2019-04-26 | 南京邮电大学 | A kind of all solid laser for lasing 350nm laser |
| CN114156727A (en) * | 2021-10-26 | 2022-03-08 | 西安电子科技大学 | High-power intermediate infrared tunable femtosecond laser generating device |
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| US6108356A (en) * | 1999-03-05 | 2000-08-22 | Photonics Industries International, Inc. | Intracavity optical parametric oscillators |
| CN102842847A (en) * | 2012-09-13 | 2012-12-26 | 天津大学 | Intracavity single resonant optical parametric oscillator (ICSRO) |
| CN103715593A (en) * | 2014-01-06 | 2014-04-09 | 天津大学 | Single-frequency intermediate infrared light source system of 2-micron fiber laser pump |
| CN103872562A (en) * | 2014-03-27 | 2014-06-18 | 天津大学 | Inner-cavity single-resonance optical parametric oscillator of fiber laser pump |
| CN104064947A (en) * | 2014-07-03 | 2014-09-24 | 西安电子科技大学 | Femtosecond optical parameter oscillator for synchronous pump of all-solid-state mode-locking Yb laser |
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| US6108356A (en) * | 1999-03-05 | 2000-08-22 | Photonics Industries International, Inc. | Intracavity optical parametric oscillators |
| CN102842847A (en) * | 2012-09-13 | 2012-12-26 | 天津大学 | Intracavity single resonant optical parametric oscillator (ICSRO) |
| CN103715593A (en) * | 2014-01-06 | 2014-04-09 | 天津大学 | Single-frequency intermediate infrared light source system of 2-micron fiber laser pump |
| CN103872562A (en) * | 2014-03-27 | 2014-06-18 | 天津大学 | Inner-cavity single-resonance optical parametric oscillator of fiber laser pump |
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|---|---|---|---|---|
| CN107104352A (en) * | 2017-06-28 | 2017-08-29 | 中国工程物理研究院激光聚变研究中心 | Optical fiber laser and optical system |
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| CN107994453A (en) * | 2017-12-29 | 2018-05-04 | 西南大学 | The Yb of laser diode-pumped tungsten disulfide tune Q：GYSO all solid state lasers |
| CN107994453B (en) * | 2017-12-29 | 2024-05-14 | 西南大学 | Tungsten disulfide phosphor QYb of laser diode pump: GYSO all-solid-state laser |
| CN109687274A (en) * | 2019-01-18 | 2019-04-26 | 南京邮电大学 | A kind of all solid laser for lasing 350nm laser |
| CN114156727A (en) * | 2021-10-26 | 2022-03-08 | 西安电子科技大学 | High-power intermediate infrared tunable femtosecond laser generating device |
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