CN106226035B - A kind of Yb dosed optical fiber photon darkening test macro - Google Patents
A kind of Yb dosed optical fiber photon darkening test macro Download PDFInfo
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- CN106226035B CN106226035B CN201610586121.8A CN201610586121A CN106226035B CN 106226035 B CN106226035 B CN 106226035B CN 201610586121 A CN201610586121 A CN 201610586121A CN 106226035 B CN106226035 B CN 106226035B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/30—Testing of optical devices, constituted by fibre optics or optical waveguides
- G01M11/33—Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter being disposed at one fibre or waveguide end-face, and a light receiver at the other end-face
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Abstract
The invention discloses a kind of Yb dosed optical fiber photons to darken test macro, and the photon that system reliably effectively detects Yb dosed optical fiber darkens effect, provides effective help for the research of high-dopant concentration Yb dosed optical fiber and the stability of laser application performance.Yb dosed optical fiber photon of the present invention darkens practical situations of the test macro combination Yb dosed optical fiber in associated laser device, is irradiated by 1.064 μm of near-infrared pumping lights, causes Yb dosed optical fiber photon and darkens effect.The laser of low-power laser is exported as seed source by one, the laser of seed source output enters pre-amplification stage, signal after pre-amplification then enters main amplifier stage, gain fibre is Yb dosed optical fiber to be measured, tested optical fiber output end passes through cladding mode device for stripping, filter out cladding mode, so that entire light path system output signal light, output signal beam passes through the laggard optical power detector of collimating mirror, to monitor Yb dosed optical fiber with pump light action time increase and Output optical power reduce the phenomenon that, the phenomenon from photon darken effect.
Description
Technical field
The invention belongs to measuring techniques for optical fiber fields, and in particular to a kind of Yb dosed optical fiber photon darkening test macro, it can
The photon of effectively detection Yb dosed optical fiber darkens effect, and the research of high-dopant concentration Yb dosed optical fiber is developed in guidance, while to high power
The stability of laser application provides effective help.
Background technique
High power ytterbium-doping optical fiber laser with its high efficiency, high stability, high light beam quality, be easy to high power extend etc.
Advantage has a wide range of applications in fields such as industrial processes, advanced manufacture, national defence.In practical engineering applications, it not only wants
Laser output power with higher is sought, and laser is required to keep good stability and longer service life.?
In ytterbium-doping optical fiber laser, Yb dosed optical fiber can be described as optical fiber laser power as the gain media for generating laser, performance
Promote mostly important limiting factor.
In high power fiber laser, it is to influence optical-fiber laser that the photon of Yb dosed optical fiber, which darkens (Photodarkening),
An important factor for device service life and stability.Therefore, it is necessary to mix mirror optical fiber photon darken performance carry out deep study and analysis,
Reduction even is eliminated photon and darkens effect, to realize the long-time stability of Yb dosed optical fiber laser activity.
Photon the Opacitization most intuitively shows as the decaying of ytterbium-doping optical fiber laser and amplifier output power at any time.
The photon of Yb dosed optical fiber darkens effect and refers in ytterbium-doping optical fiber laser or amplifier, due to factors such as temperature, illumination, causes
The certain performance degradations of Yb dosed optical fiber, thus the phenomenon that influencing laser output power and stabilised efficiency.Wherein, light irradiation is to lead
One of an important factor for causing photon to darken.The major way that the radiation-induced photon of light darkens can be using ultraviolet light, blue violet light, close
Infrared photoinduction etc..
Yb-doped double-cladding fiber is to obtain one of the most important product of high power laser light output in 1 mu m waveband, public at present
The publication No. for developing table is CN 102252834A, entitled system for testing photodarkening of gain fiber, using band tail optical fiber visible light
630nm-650nm red-light source effectively detects gain fibre by the decline of the 633nm feux rouges power that detects at any time
Photon darken effect.This method can not intuitively reflect 1 μm of power down phenomenon of Yb dosed optical fiber signal in band, Er Qieke
Light-exposed 630nm-650nm red-light source finite energy, the photon that cannot be effectively detected under higher-wattage darken effect.
Summary of the invention
The object of the present invention is to provide a kind of Yb dosed optical fiber photons to darken test macro, and system, which reliably can be detected effectively, mixes
The photon of ytterbium optical fiber darkens effect, provides effectively for the research of high-dopant concentration Yb dosed optical fiber and the stability of laser application
It helps.
Yb dosed optical fiber photon of the present invention darkens practical application feelings of the test macro combination Yb dosed optical fiber in associated laser device
Condition is irradiated by 1.064 μm of near-infrared pumping lights, is caused Yb dosed optical fiber photon and is darkened effect.The present invention is using function admirable
1.064 μm of lasers of small-power inject pre-amplification stage Yb dosed optical fiber and Yb dosed optical fiber to be measured as seed source, seed laser, constitute
Casacade multi-amplifier system realizes high-energy output.
To achieve the goals above, the present invention provides a kind of Yb dosed optical fiber photons to darken test macro, the system
By seed source, the first fibre optic isolater, the first pumping source, wavelength division multiplexer, pre-amplification stage Yb dosed optical fiber, the second Fiber isolation
Device, the second pumping source, optical-fiber bundling device, Yb dosed optical fiber to be measured, cladding mode stripper, collimation lens and optical power detector group
At wherein the laser of seed source output passes through wave by the first fibre optic isolater, with the pump light of the first pumping source output
Division multiplexer synthesizes light beam, transmits along pre-amplification stage optical fiber Yb dosed optical fiber, and output light is by the second fibre optic isolater and the
The pump light of two pumping sources output passes through the signal arm of optical-fiber bundling device respectively and pumping arm inputs, the output light of optical-fiber bundling device
Transmitted along Yb dosed optical fiber to be measured, the output end of Yb dosed optical fiber to be measured and cladding mode stripper welding, cladding mode stripper it is defeated
Light beam enters optical power detector by collimation lens out.
In one embodiment of the present of invention, the output light of the seed source is near infrared light, and wavelength is 1.064 μm, output
Optical power long-time stability (25 DEG C, 8h) be ± 0.1db, Output optical power short-term stability (25 DEG C, 15min) be ±
0.05db.
In one embodiment of the present of invention, first fibre optic isolater is with the second fibre optic isolater to the close red of 1064nm
Outer smooth reverse isolation degree is greater than 50dB, and positive insertion loss is less than 1.0dB.
In one embodiment of the present of invention, first pumping source is that wavelength is 976nm, and power is the semiconductor of 400mw
Laser.
In one embodiment of the present of invention, the wavelength division multiplexer is 960~990nm/1020~1080nm, two wave band
Wavelength division multiplexer.
In one embodiment of the present of invention, the pre-amplification stage Yb dosed optical fiber be core Bao Jing be 5/125 μm or 7/128 μm or
10/130 μm of high-selenium corn Yb dosed optical fiber, depends primarily on the model of Yb dosed optical fiber to be measured, for example, when Yb dosed optical fiber to be measured is
When 10/130 μm of optical fiber, pre-amplification stage Yb dosed optical fiber can select 5/125 μm of optical fiber；When Yb dosed optical fiber to be measured be 20/130 μm or
25/250 μm or when 30/250 μm of optical fiber, pre-amplification stage Yb dosed optical fiber can select 10/130 μm or 7/128 μm of optical fiber.
In one embodiment of the present of invention, second pumping source is the semiconductor laser that wavelength is 915nm, power
The spontaneous radiation that needs to consider the absorbent properties of Yb dosed optical fiber to be measured and its can generate is selected to transmit in signal optical fibre, when to be measured
When Yb dosed optical fiber is 10/130 μm of optical fiber, the semiconductor laser of 10W can be selected；When Yb dosed optical fiber to be measured be 20/130 μm or
25/250 μm or when 30/250 μm of optical fiber, the semiconductor laser of 25W, 30W or 50W, power adjustable section can be selected.
In one embodiment of the present of invention, the optical-fiber bundling device is (1+1) × 1 optical-fiber bundling device.
In one embodiment of the present of invention, the central wavelength of the cladding mode stripper is 1064nm, and output optical fibre is single
Cladded-fiber.
In one embodiment of the present of invention, the system also includes the first pump protection device and the second pump protection device, institutes
The input terminal for stating the first pump protection device is connected with the output end of the first pumping source, the input terminal of second pump protection device with
The output end of second pumping source is connected.
Yb dosed optical fiber photon provided by the invention darkens test macro, can effectively detect Yb dosed optical fiber photon and darken effect
It answers, carries out deep study and analysis convenient for darkening performance to the photon for mixing mirror optical fiber, further instruct Yb dosed optical fiber manufacturing process, together
When to improve ytterbium-doping optical fiber laser output power, ensure output stability and reliability and solution optical fiber laser in other
Bottleneck problem is of great significance.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that Yb dosed optical fiber photon of the present invention darkens test macro；
Fig. 2 is that the photon of the Yb dosed optical fiber for two kinds of different process production that the present invention tests out darkens effect result figure；
Fig. 3 is the result of one 25/250 Double Cladding Ytterbium Doped Fiber tested out to reflect that the photon of this root optical fiber darkens
Benefit；
In all the appended drawings, identical appended drawing reference is used to denote the same element or structure, in which:
1- seed source 2- the first fibre optic isolater 3- the first pump protection device 4- the first pumping source 5- wavelength division multiplexer 6- is pre-
Amplifying stage Yb dosed optical fiber 7- the second fibre optic isolater 8- the second pump protection device 9- the second pumping source 10- optical-fiber bundling device 11- is waited for
Survey Yb dosed optical fiber 12- cladding mode stripper 13- collimation lens 14- optical power detector.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
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 long as in addition, technical characteristic involved in the various embodiments of the present invention described below
Not constituting a conflict with each other can be combined with each other.
In view of the simple 4f of ytterbium ion13Electronic structure, without Excited-state Absorption, cross-relaxation process and more upper turn
Change or internal mechanism caused by the consumption of upper energy level population and the reduction in effective laser section；The close hair of absorbing wavelength simultaneously
Ejected wave is long, and quantum defect is small so that hot loss is lower than 15%, and the sub- defect of neodymium-doped laser tolerance of identical operation wavelength is up to 30%
To 40%；Absorption and emissive porwer height and spectrum width；Therefore trivalent ytterbium ion is very suitable near infrared laser, using 900nm
Semiconductor laser to 980rnn carries out laser of the pumping realization operation wavelength near 1 μm.
Yb dosed optical fiber photon of the present invention darkens practical application feelings of the test macro combination Yb dosed optical fiber in associated laser device
Condition is irradiated by 1.064 μm of near-infrared pumping lights, and certain element energy level transitions, doping particle may occur for Yb dosed optical fiber to be measured
Number reversion and light microstructure change cause Yb dosed optical fiber photon and darken effect, reliably can effectively detect the light of Yb dosed optical fiber
Son darkens effect.
The structure that Yb dosed optical fiber photon of the present invention darkens test macro includes that seed signal light part, pre-amplification stage and master are put
Big grade.Seed signal light part by one export low-power laser laser be used as seed source, seed source export laser into
Enter pre-amplification stage, the signal after pre-amplification then enters main amplifier stage, and gain fibre is Yb dosed optical fiber to be measured.
As shown in Figure 1, Yb dosed optical fiber photon darkening test system structure proposed by the present invention is as follows:
Including seed source 1, the first fibre optic isolater 2, the first pump protection device 3, the first pumping source 4, wavelength division multiplexer 5,
Pre-amplification stage Yb dosed optical fiber 6, the second fibre optic isolater 7, the second pump protection device 8, the second pumping source 9, optical-fiber bundling device 10, to
Survey Yb dosed optical fiber 11, cladding mode stripper 12, collimation lens 13 and optical power detector 14.
The laser of seed source output passes through the first fibre optic isolater, multiple by wavelength-division with the pump light of the first pumping source output
It with device multiplex at light beam, is transmitted along pre-amplification stage Yb dosed optical fiber, output light is by the second fibre optic isolater and the second pumping
The pump light of source output passes through the signal arm and pumping arm of optical-fiber bundling device respectively, and total output light is passed along Yb dosed optical fiber to be measured
Defeated, Yb dosed optical fiber to be measured output filters out cladding mode by cladding mode stripper, output signal beam pass through collimation lens finally into
Optical power detector.
1064nm seed source 1 with tail optical fiber and the 2 input terminal welding of the first fibre optic isolater with tail optical fiber in present invention implementation,
The input terminal welding of the first pumping source 4 and the first pump protection device 3 with tail optical fiber, the first fibre optic isolater 2 with tail optical fiber it is defeated
The output end of outlet and the first pump protection device 3 respectively with 1020~1080nm/960 of wavelength division multiplexer 5~990nm two
Channel welding, the output end of wavelength division multiplexer 5 and the 6 one end welding of pre-amplification stage Yb dosed optical fiber, pre-amplification stage Yb dosed optical fiber 6 it is another
Outer one end and the 7 input terminal welding of the second fibre optic isolater with tail optical fiber, the output end of the second pumping source 9 with tail optical fiber and the second pump
The input terminal welding of Pu protector 8, the output end of the second fibre optic isolater 7 with tail optical fiber and the output of the second pump protection device 8
Respectively with the signal arm optical fiber of optical-fiber bundling device 10 and pumping arm fused fiber splice, the output end optical fiber of optical-fiber bundling device 10 received at end
Survey Yb dosed optical fiber 11, the input terminal welding of the other end and cladding mode stripper 12 of Yb dosed optical fiber 11 to be measured, cladding mode stripper
Collimated 13 focussed collimated of lens of 12 output end is not incorporated ytterbium fiber absorption at a branch of directional light, by pump laser sending
Residual pump light is cladding light, passes through the major part of collimation lens 13 by cladding mode stripper 12 and single covering tail optical fiber, residue
Light is 1064nm signal light, into optical power detector 14, real-time function that bundled software received optical power detector 14 detects
Rate information.Alignment welding of the fused fiber splice all with fibre core to fibre core in whole system.
1 output light of seed source is near infrared light, and wavelength 1064nm, the pulsewidth of pulse signal is 26ns, pulse weight
Complex frequency is 100KHZ.
First fibre optic isolater is band tail optical fiber fibre optic isolater, output end of the welding in seed source.Second light
Fiber isolator is band tail optical fiber fibre optic isolater, output end of the welding in pre-amplification stage Yb dosed optical fiber 6.
First fibre optic isolater 2 is greater than near infrared light reverse isolation degree of second fibre optic isolater 7 to 1064nm
50dB, positive insertion loss are less than 1.0dB, echo reflection can be effectively prevented, and prevent the 1064nm signal exported to seed source
Light interferes.
The first pump protection device welding can be effectively isolated after the tail optical fiber of first pumping source and carry out self-reversal biography
The damage of defeated Active Optical Fiber bring spontaneous emission light Amplified spontaneous emission, ASE.
The wavelength division multiplexer be 960~990nm/1020~1080nm, two wavelength multiplexer, respectively welding with kind
After first fibre optic isolater 2 of component output end connection and the first pump protection device 3 being connect with 4 output end of the first pumping source,
The effect of two wavelength multiplexings is played, and since two channel wavelength intervals are wider, by laser wavelength drift bring train of signal
The influence disturbed to system is smaller, while can protect laser diode.
First pumping source 4 and the second pumping source 9 is respectively the semiconductor laser that wavelength is 976nm, 915nm,
It is that there is high quantum efficiency due to the Yb dosed optical fiber using ytterbium ion as gain ion, it is with higher in 915nm and 976nm
Absorption peak.Its power selection needs to consider the absorbent properties of Yb dosed optical fiber to be measured and its spontaneous radiation that can generate is in signal optical fibre
Middle transmission can select the semiconductor laser of 10W when Yb dosed optical fiber to be measured is 10/130 μm of optical fiber；Ytterbium light is mixed when to be measured
When fibre is 20/130 μm or 25/250 μm or 30/250 μm of optical fiber, the semiconductor laser of 25W, 30W or 50W, function can be selected
Rate is adjustable.
The pre-amplification stage Yb dosed optical fiber 6 is that the high-selenium corn that core Bao Jing is 5/125 μm or 7/128 μm or 10/130 μm is mixed
Ytterbium optical fiber depends primarily on the model of Yb dosed optical fiber 11 to be measured, connect with the output tail optical fiber of wavelength division multiplexer.For example, when to be measured
When Yb dosed optical fiber is 10/130 μm of optical fiber, pre-amplification stage Yb dosed optical fiber can select 5/125 μm of optical fiber；When Yb dosed optical fiber to be measured is
20/130 μm or 25/250 μm or when 30/250 μm of optical fiber, pre-amplification stage Yb dosed optical fiber can select 10/130 μm or 7/128 μm
Optical fiber.
The pre-amplification stage Yb dosed optical fiber 6 is that the high-selenium corn that core Bao Jing is 5/125 μm or 7/128 μm or 10/130 μm is mixed
Ytterbium optical fiber depends primarily on the model of Yb dosed optical fiber 11 to be measured, connect with the output tail optical fiber of wavelength division multiplexer.
The optical-fiber bundling device is the optical-fiber bundling device of 1+1 × 1, second after signal arm and pre-amplification stage Yb dosed optical fiber 6
8 welding of pump protection device after the output end welding of fibre optic isolater 7, pumping arm and the second pumping source 9.Optical-fiber bundling device it is defeated
Tail optical fiber and Yb dosed optical fiber welding to be measured out, the fiber numerical aperture Numerical of the output tail optical fiber of optical-fiber bundling device
Aperture, NA value are matched with the fiber numerical aperture NA value of testing fiber.
The Yb dosed optical fiber to be measured can be that core Bao Jing is 10/130 μm or 20/130 μm or 25/250 μm or 30/250 μ
M or 20/400 μm of Yb dosed optical fiber.
The Yb dosed optical fiber to be measured can be that core Bao Jing is 10/130 μm or 20/130 μm or 25/250 μm or 30/250 μ
M or 20/400 μm of Yb dosed optical fiber.
For the cladding mode stripper for stripping cladding mode from optical fiber, it is 1064nm that center, which can pass through wavelength,
Optical signal, output tail optical fiber is that single cladded-fiber only needs because photon darkens the area Can Yi that effect occurs over just fibre core
The signal light transmitted in fibre core is monitored.
The collimation lens is non-spherical lens, for the signal light collimation focusing to output.
The optical power detector is thermocouple detector, for real-time detection and tracer signal optical power, convenient for seeing
Examine and handle data.
Further, the embodiment of the present invention can protect each first device in whole system using the heat dissipation of air-cooled and aluminium sheet
Part.
Example 1:
For testing core cored diameter than the Double Cladding Ytterbium Doped Fiber for 10/130, Active Optical Fiber to be measured is melted with heat sealing machine
It connecing between optical-fiber bundling device 10 and cladding mode stripper 12,10 tail optical fiber of optical-fiber bundling device is 10/130 double clad passive fiber,
It is 10/130 single covering passive fiber that cladding mode stripper 12, which connects optical fiber, and pre-amplification stage Yb dosed optical fiber 6 is that core Bao Jing is 5/125
μm high-selenium corn Yb dosed optical fiber, check whether entire test platform is put up according to above-mentioned, first open 1064nm seed source 1, then
4 electric current of the first pumping source of 976nm is adjusted, it can be by infrared viewer and ammeter observation laser and pumping ource electric current setting
Situation has adjusted the first pump power and then has adjusted 9 electric current of the second pumping source of 915nm, while optical power spy can be observed
The changed power for surveying 14 bundled software of device and power meter gauge outfit, stablizes the second pumping current, stablizes entire test macro, software connects
The realtime power information that optical power detector 14 detects is received, the power data changed over time is finally acquired and handles data.
Fig. 2 is 10/130 Double Cladding Ytterbium Doped Fiber of the two kinds of different process production tested out as a result, the 1064nm letter detected
Number optical power declines faster at any time, i.e., slope is bigger, then shows that photon darkens efficiency and is more obvious.
Example 2:
For testing core cored diameter than the Double Cladding Ytterbium Doped Fiber for 25/250, testing fiber cut-in method such as figure example
1, replacement 10 tail optical fiber of optical-fiber bundling device is 25/250 double clad passive fiber, and it is 25/250 single that cladding mode stripper 12, which connects optical fiber,
Covering passive fiber, pre-amplification stage Yb dosed optical fiber 6 are the high-selenium corn Yb dosed optical fiber that core Bao Jing is 10/130 μm, first open 1064nm
Seed source 1, then adjust 4 electric current of the first pumping source of 976nm, can be by infrared viewer and ammeter observation laser and pump
Pu ource electric current facilities have adjusted the first pump power and then have adjusted 9 electric current of the second pumping source of 915nm, while considerable
The changed power for observing 14 bundled software of optical power detector and power meter gauge outfit stablizes the second pumping current, stablizes entire survey
Test system, the realtime power information that software received optical power detector 14 detects, finally acquires the power number changed over time
According to and handle data.Fig. 3 is the result of one 25/250 Double Cladding Ytterbium Doped Fiber tested out to reflect the light of this root optical fiber
Son darkens benefit.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should all include
Within protection scope of the present invention.
Claims (6)
1. a kind of Yb dosed optical fiber photon darkens test macro, which is characterized in that the system is by seed source (1), the first Fiber isolation
Device (2), the first pumping source (4), wavelength division multiplexer (5), pre-amplification stage Yb dosed optical fiber (6), the second fibre optic isolater (7), second
Pumping source (9), optical-fiber bundling device (10), Yb dosed optical fiber to be measured (11), cladding mode stripper (12), collimation lens (13) He Guanggong
Rate detector (14) composition, wherein the laser of the seed source (1) output is pumped by the first fibre optic isolater (2) with first
The pump light of source (4) output synthesizes light beam by wavelength division multiplexer (5), transmits along pre-amplification stage optical fiber Yb dosed optical fiber (6),
Pump light of the output light by the second fibre optic isolater (7) and the second pumping source (9) output passes through optical-fiber bundling device (10) respectively
Signal arm and pumping arm input, the output light of optical-fiber bundling device (10) is transmitted along Yb dosed optical fiber to be measured (11), to be measured to mix ytterbium
The output beam of the output end of optical fiber (11) and cladding mode stripper (12) welding, cladding mode stripper (12) passes through collimation lens
(13) enter optical power detector (14)；
The output light of the seed source (1) be near infrared light, wavelength 1064nm, Output optical power long-time stability be ±
0.1db, Output optical power short-term stability are ± 0.05db；
The central wavelength of the cladding mode stripper (12) is 1064nm, and output optical fibre is single cladded-fiber；
First pumping source (4) is that wavelength is 976nm, and power is the semiconductor laser of 400mw；
Second pumping source (9) is the semiconductor laser that wavelength is 915nm.
2. Yb dosed optical fiber photon as described in claim 1 darkens test macro, which is characterized in that first fibre optic isolater
(2) it is greater than 50dB with the near infrared light reverse isolation degree of the second fibre optic isolater (7) to 1064nm, positive insertion loss is less than
1.0dB。
3. Yb dosed optical fiber photon as described in claim 1 darkens test macro, which is characterized in that the wavelength division multiplexer (5)
For the wavelength division multiplexer of 960~990nm/1020~1080nm, two wave band.
4. Yb dosed optical fiber photon as described in claim 1 darkens test macro, which is characterized in that the pre-amplification stage mixes ytterbium light
Fine (6) are the high-selenium corn Yb dosed optical fiber that core Bao Jing is 5/125 μm or 7/128 μm or 10/130 μm.
5. Yb dosed optical fiber photon as described in claim 1 darkens test macro, which is characterized in that the optical-fiber bundling device (10)
For (1+1) × 1 optical-fiber bundling device.
6. Yb dosed optical fiber photon as described in claim 1 darkens test macro, which is characterized in that further include the first pumping protection
Device (3) and the second pump protection device (8), the input terminal of first pump protection device (3) and the output end of the first pumping source (4)
It is connected, the input terminal of second pump protection device (8) is connected with the output end of the second pumping source (9).
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| CN102252834A (en) * | 2011-06-28 | 2011-11-23 | 武汉锐科光纤激光器技术有限责任公司 | Photon darkening test system for gain fiber |
| CN102853996A (en) * | 2012-08-17 | 2013-01-02 | 华中科技大学 | Photon darkening test device of active rare earth doped fiber |
| CN103311786A (en) * | 2013-06-19 | 2013-09-18 | 深圳大学 | Erbium-ytterbium doped fiber laser device for restraining Yb (ytterbium)-ASE (amplifier spontaneous emission) |
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| JP2008270246A (en) * | 2007-04-16 | 2008-11-06 | Fujikura Ltd | Rare-earth-doped optical fiber and fiber laser |
| JP2009290203A (en) * | 2008-04-30 | 2009-12-10 | Sumitomo Electric Ind Ltd | Optical amplification module and laser light source device |
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| CN102252834A (en) * | 2011-06-28 | 2011-11-23 | 武汉锐科光纤激光器技术有限责任公司 | Photon darkening test system for gain fiber |
| CN102853996A (en) * | 2012-08-17 | 2013-01-02 | 华中科技大学 | Photon darkening test device of active rare earth doped fiber |
| CN103311786A (en) * | 2013-06-19 | 2013-09-18 | 深圳大学 | Erbium-ytterbium doped fiber laser device for restraining Yb (ytterbium)-ASE (amplifier spontaneous emission) |
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