CN113540951A - Ultra-wideband light source based on bismuth-erbium co-doped optical fiber - Google Patents
Ultra-wideband light source based on bismuth-erbium co-doped optical fiber 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
- H01S3/0941—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a laser diode
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
- H01S3/06716—Fibre compositions or doping with active elements
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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
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
- H01S3/131—Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling the active medium, e.g. by controlling the processes or apparatus for excitation
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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
- H01S3/14—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range characterised by the material used as the active medium
- H01S3/16—Solid materials
- H01S3/1601—Solid materials characterised by an active (lasing) ion
- H01S3/162—Solid materials characterised by an active (lasing) ion transition metal
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Abstract
The invention provides an ultra-wideband light source based on a bismuth-erbium co-doped optical fiber, which comprises a pumping laser, an isolator, the bismuth-erbium co-doped optical fiber and a bent single-mode optical fiber, wherein the bismuth-erbium co-doped optical fiber is an active optical fiber mainly doped with bismuth and erbium ions and aluminum ions with certain concentration; the bent single-mode fiber is a common single-mode fiber which is bent with a certain diameter and coiled into a plurality of circles and is used for filtering a high-order mode and improving the quality of a light beam; the pump laser, the isolator, the bismuth-erbium co-doped optical fiber and the single-mode optical fiber are sequentially connected; the pump light emitted by the pump laser enters the bismuth-erbium co-doped fiber after passing through the isolator, and the outer layer electron transition of bismuth, erbium and the like in the bismuth-erbium co-doped fiber is excited to generate fluorescence, so that the high-brightness broadband spectrum with the diffraction limit can be obtained through the simple structure. The invention adopts a one-way pumping structure, has simple structure, low cost and high brightness, is easy to realize, and can output a high-brightness ultra-wideband fluorescence spectrum of 1400-1700 nm by adjusting the co-doping concentration of bismuth, erbium, aluminum and the like, the power of a pump spectrum laser and the length of an optical fiber.
Description
(I) technical field
The invention belongs to the field of rare earth doped optical fiber light sources, and particularly relates to an ultra-wideband light source based on a bismuth-erbium co-doped optical fiber.
(II) background of the invention
In recent years, broadband ASE fiber light sources radiating in the safe range of human eyes are becoming popular for research, and are widely applied in the fields of medical treatment, optical communication, fiber sensing, optical device testing and the like. At present, the research and application of erbium-doped fiber light sources are mature and commercialized, but the wavelength range is only 1527nm to 1625 nm. The development of the anhydrous optical fiber preparation technology enables the quartz optical fiber to have very low loss in the wavelength range of 1100-1700 nm, the development of the ultra-wideband optical fiber light source can play a great role in promoting the application and development of full-waveband communication, and the development of the fields of large-capacity optical fiber sensing, optical information processing, biology and the like can be promoted.
Because the rare earth doped glass fiber has a wider gain spectrum, the rare earth doped glass fiber is widely applied to the construction of active optical devices such as fiber amplifiers, lasers and the like, and is doped with erbium ions (Er)3+) The emission spectrum of the optical fiber is in a 1550nm communication window, and the optical fiber has the characteristics of reducing system coherent back scattering noise, phase noise caused by optical Rayleigh scattering and phase zero drift caused by an optical Kerr effect, and is an excellent broadband light source.
Compared with the current commercial broadband radiation light-emitting diode, the erbium-doped ultra-wideband optical fiber light source has the characteristics of good temperature stability, high output power, good spectral stability, low polarization correlation, long service life, easiness in coupling with a single-mode optical fiber sensing system and the like. Because the rare earth doped fiber is limited by the working bandwidth of the erbium-doped fiber at present, the bandwidth range of the erbium-doped fiber light source on the market is mostly concentrated in a C + L band (1527-1625 nm), and a few ultra-wide band fiber light sources with the bandwidth of 1460-1625 nm in an S + C + L band are available.
At present, the bismuth-doped material can sequentially realize ultra-wideband Near Infrared (NIR) and fluorescence covering the whole low-loss communication window at the waveband of 900-1800 nm by changing conditions such as a substrate material, a pumping wavelength and the like, and becomes one of the most promising active media at the waveband.
From the amplification effect of the light source, the doping concentration of bismuth ions and erbium ions is an important factor influencing the broadband light source technology, and the broadband optical fiber light source with large bandwidth, good flatness and high output power can be manufactured by adjusting the doping concentration of bismuth ions and erbium particles in the optical fiber.
Patent 201310560649.4 discloses an ultra-wideband fiber light source system, which utilizes a semiconductor pump laser to emit pump light, which is respectively pumped through an erbium particle doped fiber and a bismuth ion doped fiber by a wideband fiber coupler, thereby respectively forming erbium particle doped fiber superfluorescence and bismuth ion doped fiber superfluorescence, and then coupled by the wideband coupler, so as to obtain an ultra-wideband fiber light source with an emission spectrum range of 1100-1600 nm. The patent spectrum range can not cover 1600-1700 nm.
Patent 201310560641.8 discloses an ultra-wideband light source, which utilizes a pump light emitting device to emit pump light, wherein erbium, thulium and neodymium (or dysprosium, praseodymium) ions are respectively doped with optical fibers, after being pumped by the pump light emitting device, the generated three paths of spontaneous emission light are amplified under the pumping of the pump light to form three paths of fluorescence, the three paths of fluorescence are coupled through an optical fiber coupler, and the ultra-wideband fluorescence of 1100-1600 nm is obtained at the output end of the optical fiber coupler. The patent spectrum range can not cover 1600-1700 nm.
Patent 201310560042.6 discloses an ultra wide band light source based on erbium thulium neodymium codoped optic fibre, including pump laser, laser coupler and erbium thulium neodymium codoped optic fibre, the pump light that pump laser sent gets into erbium thulium neodymium codoped optic fibre through pump coupler, by erbium thulium neodymium codoped optic fibre output transmission 1280 ~ 1685nm broadband light. The fluorescence spectrum of the ultra-wideband light source has three large emission peaks at 1530nm, 1470nm and 1310nm, but the flatness of the light source is poor.
The utility model discloses a 201620273670.5 discloses a bipolar double-pumped C + L wave band's high power erbium-doped broadband light source, including the pump source, wavelength division multiplexer, isolator, erbium-doped optical fiber, optical fiber reflector, laser diode temperature and power control circuit, regard as the pump source with two 980nm and a 1480nm laser diode, regard as the optical fiber reflector with two 3dB bandwidth couplers, utilize power control circuit to let the light source export photostability, obtain power and be 169mW, the bandwidth scope is at 1525.112 ~ 1605.813 nm's output spectrum. The light source has good output flatness and narrow broadband.
The utility model 201721446384.5 discloses an er-thulium mixed doped fiber super-fluorescence ultra-wideband light source, which combines the thulium doped S-band light source and the er doped C + L-band light source to output through a coupler, thereby generating an S + C + L-band wideband light source, wherein the thulium doped S-band light source comprises a first annular mirror, a first er doped fiber, a first wavelength division multiplexer, a fiber emitter, a thulium doped fiber, a second wavelength division multiplexer, and a fiber circulator which are connected in sequence, the er doped C + L-band light source comprises a second annular mirror which is connected in sequence, the first erbium-doped fiber is pumped by a 980nm LD, the thulium-doped fiber is pumped by a 1400nm LD, the bandwidth of the ultra-wideband light source is 1460nm to 1610nm, and the total output power is about 15.6 dBm. The patent has a large spectral range, but cannot cover 1610nm to 1700 nm.
Patent 201810777894.3 discloses a flat erbium-ytterbium co-doped fiber light source, which comprises a pump light source, a beam combiner, an erbium-ytterbium co-doped double-clad fiber, a fiber circulator, a light circulator, a gain flattening filter and a reflector, wherein a 975nm multimode semiconductor pump laser is used as the pump light source, a single-pump single-stage double-pass backward structure is adopted, and the erbium-ytterbium co-doped double-clad fiber is used as the gain medium, thus the advantages of the structure of the fiber light source in volume, output spectral flatness and light source temperature performance are provided.
In summary, the bandwidth of the existing broadband light source based on spontaneous radiation is mostly concentrated in the S + C + L band of 1460-1610 nm, and the traditional rare earth doped broadband fiber light source cannot meet the application of full-band communication of 1100-1700 nm fibers. The invention provides an ultra-wideband light source based on a bismuth-erbium co-doped optical fiber, which is made of SiO2Is a substrate material, has good reliability, is compatible with the existing devices, is doped with a light source with a single-pass structure of bismuth ions, erbium particles and aluminum ions, forms erbium ion superfluorescence with the central wavelength of about 1530nm and superfluorescence radiated by multivalent bismuth ions under the pumping of a 940-980 nm single-mode semiconductor laser with the power of 50-300 mW, outputs an ultra-wideband fluorescence spectrum with the wavelength range of 1400-1700 nm, and has low cost,High brightness, output close to diffraction limit, large bandwidth, etc.
Disclosure of the invention
The invention aims to provide a low-cost and high-brightness ultra-wideband light source based on a bismuth-erbium co-doped optical fiber, which solves the problem that the bandwidth of the output spectrum of the conventional rare earth ion doped optical fiber light source is only limited to the S + C + L wave band of 1460-1610 nm, and realizes the output of the ultra-wideband high-brightness spectrum of 1400-1700 nm.
The purpose of the invention is realized as follows:
an ultra-wideband light source based on a bismuth-erbium co-doped fiber comprises a pump laser, an isolator, the bismuth-erbium co-doped fiber and a bent single-mode fiber, wherein the bismuth-erbium co-doped fiber is an active fiber mainly doped with bismuth and erbium ions and aluminum ions with a certain concentration; the bent single-mode fiber is a common single-mode fiber which is bent with a certain diameter and coiled into a plurality of circles and is used for filtering a high-order mode and improving the quality of a light beam; the pump laser, the isolator, the bismuth-erbium co-doped optical fiber and the single-mode optical fiber are sequentially connected; the pump light emitted by the pump laser enters the bismuth-erbium co-doped fiber after passing through the isolator, the outer layer electron transition of bismuth and erbium plasma in the bismuth-erbium co-doped fiber is excited to generate fluorescence, and the high-brightness broadband spectrum with the diffraction limit can be obtained through the simple one-way pump structure. The invention adopts a one-way pumping structure, has simple structure, low cost and high brightness, is easy to realize, and can output a high-brightness ultra-wideband fluorescence spectrum of 1400-1700 nm by adjusting the co-doping concentration of bismuth, erbium, aluminum and the like, the power of a pump spectrum laser and the length of an optical fiber.
The pump laser is a single-mode semiconductor laser, the central wavelength of laser emitted by the single-mode semiconductor laser is 940-980 nm, the power range of pump light emitted by the single-mode semiconductor laser is 50-300 mW, and the bismuth-erbium co-doped optical fiber is pumped after passing through the isolator. The insertion loss of the isolator is less than or equal to 1dB, and the reverse isolation is more than or equal to 40 dB.
The length of the bismuth-erbium co-doped fiber is 0.5-1.5 m, the diameter of a fiber core of the fiber is 7.0-8.5 mu m, the relative refractive index difference of the fiber core is 0.80-1.15%, the cut-off wavelength of the fiber is more than or equal to 1400nm, the doping concentration range of erbium ions in the bismuth-erbium co-doped fiber is 2000-3500 ppm, the doping concentration range of bismuth ions is 50-150 ppm, the doping concentration range of aluminum ions is 200-500 ppm, the maximum absorption coefficient of the bismuth-erbium co-doped fiber near 1530nm is 50-91 dB/m, and the ultra-wideband flat fluorescence spectrum is obtained under a laser pump by adjusting the concentrations and the proportions of the three ions. The basic range of the fluorescence spectrum of the conventional erbium-doped fiber is 1525nm to 1568 nm; the fluorescence spectrum of the erbium-doped optical fiber with the assistance of a double-pass structure or other complex optical cavities can cover 1525nm to 1620 nm. The fluorescence spectrum of the bismuth-erbium co-doped optical fiber can cover 1300 nm-1610 nm, which shows that the current exploration of a wide-spectrum light source has certain limitation. The bismuth-erbium co-doped optical fiber forms erbium ion superfluorescence with the central wavelength of about 1530nm and superfluorescence radiated by multi-valence bismuth ions under the pumping of pumping light, and an ultra-wideband fluorescence spectrum with the emission wavelength range of 1400-1700 nm is obtained under the combined action of the bismuth-erbium co-doped optical fiber and the pumping light, and the main reason is that the ion energy level is split into more fine structures through the optical fiber design and the doping design, so that the spectrum range of multi-level transition is widened to 1700 nm.
Because the cut-off wavelength of the bismuth-erbium co-doped optical fiber used in the invention is long, the output light source may not be a single-mode light source. In order to solve the problem, experiments show that mode stripping is formed on the output tail fiber through bending, and the ultra-wideband diffraction limit light source output can be realized. The bending single-mode fiber is a common single-mode fiber which is bent at a certain diameter and coiled into a plurality of circles so as to play a role in filtering a high-order mode, and experiments prove that the bending diameter and the number of the coiling circles of the single-mode fiber can be phi 30mm multiplied by 1, also can be phi 40mm multiplied by 5, also can be phi 50mm multiplied by 20, and also can be phi 60mm multiplied by 100, so that the output light source can be ensured to be a single-mode light source.
The invention provides an ultra-wideband light source based on a bismuth-erbium co-doped optical fiber, which is made of SiO2The light source is a substrate, ensures good thermal stability and environmental stability of the light source, and can be compatible with all devices in the existing optical fiber communication. The spontaneous radiation light source mainly doped with bismuth ions, erbium particles and aluminum ions generates spontaneous radiation and reception by bismuth ions and erbium ions in the bismuth-erbium co-doped optical fiber under the pumping of 50-300 mW pump light of a single-mode semiconductor laser with the central wavelength of emission laser being 940-980 nmAnd (3) exciting radiation to form erbium ion superfluorescence with the central wavelength of about 1530nm and the superfluorescence radiated by the multivalent bismuth ions, outputting an ultra-wideband fluorescence spectrum with the wavelength range of 1400-1700 nm under the combined action, wherein the total output power can reach 0.35-0.84 mW. Most of the documents show that the output optical power of the bismuth-doped optical fiber is limited due to the physical characteristics and the process characteristics of bismuth ions, most of the tested spectral line brightness is not more than-50 dBm under the resolution of 2nm, and the high-brightness wide-spectrum output of mW magnitude can be realized by exploring the optical fiber structure design and the doping process, so that the practicability is higher.
Compared with the prior art, the invention has the following beneficial effects:
the bismuth-erbium co-doped fiber is only required to be pumped by a laser, an isolator and a single-mode fiber except for the bismuth-erbium co-doped fiber, is compatible with all devices in the existing fiber communication, and has a simple structure, and the cost is about 1/2 of other schemes; the invention adopts a one-way pumping structure, the bent single-mode optical fiber filters a high-order mode, the stability is high, and the noise is low; the ultra-wideband fluorescent light source can output ultra-wideband fluorescent light with the wavelength range of 1400-1700 nm, and has the advantages of large spectral bandwidth, high brightness, no maintenance and high reliability.
(IV) description of the drawings
Fig. 1 is a schematic structural diagram of an ultra-wideband light source based on a bismuth-erbium co-doped fiber. The fiber laser comprises a pump laser 1, an isolator 2, a bismuth-erbium co-doped fiber 3 and a bent single-mode fiber 4.
FIG. 2 is a fluorescence spectrum of 1400-1700 nm output by an ultra-wideband light source based on a bismuth-erbium co-doped fiber when the output power of a pump laser is set to 300mW and the length of the bismuth-erbium co-doped fiber is 1.5 m.
FIG. 3 is a graph showing that when the length of a bismuth-erbium co-doped fiber is 1.5m, and the output powers of pump lasers are respectively set to be 50mW, 100mW, 150mW, 200mW, 250mW and 300mW, the output fluorescence spectrum intensity varies with the pump power within a range of 1300-1700 nm for an ultra-wideband light source based on the bismuth-erbium co-doped fiber.
(V) detailed description of the preferred embodiments
The invention will be further explained with reference to the drawings and examples.
Example 1:
as shown in fig. 1, an ultra-wideband light source based on a bismuth-erbium co-doped fiber comprises a pump laser 1, an isolator 2, a bismuth-erbium co-doped fiber 3 and a bent single-mode fiber 4; the pump laser 1 is a single-mode semiconductor laser with temperature control and an output wavelength of 974nm, the bismuth-erbium co-doped fiber 3 is an optical fiber mainly doped with bismuth, erbium and aluminum, the length of the optical fiber is 1.5m, and the bent single-mode optical fiber is a common single-mode optical fiber with a bending radius of 15mm and wound by 1 circle; the tail fiber of the pump laser 1 is in fusion splicing with the fiber entering of the isolator 2, the fiber exiting of the isolator 2 is in fusion splicing with one end of the bismuth-erbium co-doped fiber 3, the other end of the bismuth-erbium co-doped fiber 3 is in fusion splicing with one end of the bent single-mode fiber, and the other end of the bent single-mode fiber is the output end of the ultra-wideband light source based on the bismuth-erbium co-doped fiber. The pump laser 1 is a 980nm single-mode semiconductor laser, pump light output by the pump laser passes through an isolator 2, bismuth ions and erbium particles in a 1.5m long bismuth-erbium co-doped optical fiber 3 respectively generate spontaneous radiation and stimulated radiation to form erbium ion superfluorescence with the central wavelength of about 1530nm and superfluorescence radiated by multivalent bismuth ions, and the pump laser generates ultra-wideband spontaneous radiation light with the bandwidth range of 1400-1700 nm after a high-order mode is filtered by a bent single-mode optical fiber, and an actually measured curve of the fluorescence intensity of the ultra-wideband spontaneous radiation light changing along with the output power of the pump laser 1 is shown in fig. 3.
Design parameters in the above embodiments although preferred, the above embodiments also describe the present invention in detail, but those skilled in the art can understand that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the spirit and scope of the invention, which is defined by the claims and their equivalents.
Claims (7)
1. An ultra-wideband light source based on a bismuth-erbium co-doped fiber is characterized by comprising a pump laser, an isolator, the bismuth-erbium co-doped fiber and a bent single-mode fiber, wherein the output end of the pump laser is connected with the inlet of the isolator; the outlet of the isolator is connected with one end of the bismuth-erbium co-doped optical fiber; the other end of the bismuth-erbium co-doped fiber is connected with one end of a bent single-mode fiber, and the other end of the bent single-mode fiber is the output end of the ultra-wideband light source based on the bismuth-erbium co-doped fiber.
The invention adopts a one-way pumping structure, the bismuth-erbium co-doped fiber is pumped by the pumping spectrum laser to form an ultra-wideband fluorescence spectrum of outer-layer electron common radiation of bismuth ions and erbium ions, and then the ultra-wideband fluorescence spectrum is output from the output end by filtering a high-order mode through the bent single-mode fiber, so that the high-brightness ultra-wideband fiber light source with low cost, high brightness and certain diffraction limit is obtained.
2. The ultra-wideband light source based on bismuth-erbium co-doped fiber as claimed in claim 1, wherein said pump laser is a single mode semiconductor laser emitting laser light with a center wavelength in the range of 940-980 nm, said single mode semiconductor laser emitting pump light with a power in the range of 50-300 mW, said pump light pumping the bismuth-erbium co-doped fiber after passing through the isolator.
3. The ultra-wideband light source based on the bismuth-erbium co-doped fiber according to claim 1, wherein the doping concentration of erbium ions in the bismuth-erbium co-doped fiber ranges from 2000 to 3500ppm, the doping concentration of bismuth ions ranges from 50 to 150ppm, the doping concentration of aluminum ions ranges from 200 to 500ppm, and the maximum absorption coefficient of the bismuth-erbium co-doped fiber is 50 to 91dB/m in the vicinity of 1530 nm.
4. The ultra-wideband light source based on the bismuth-erbium co-doped fiber as claimed in claim 1, wherein the length of the bismuth-erbium co-doped fiber is 0.5-1.5 m, the fiber core diameter is 7.0-8.5 μm, the relative refractive index difference of the fiber core is 0.80-1.15%, and the cut-off wavelength of the fiber is not less than 1400 nm.
5. The ultra-wideband light source based on bismuth-erbium co-doped fiber as claimed in claim 1, wherein the bent single mode fiber is a normal single mode fiber bent at a certain diameter and coiled into several turns, and the bent single mode fiber is mode-stripped by bending to filter high-order modes and realize the ultra-wideband diffraction limit light source output, and the bent diameter and the number of turns of the single mode fiber can be phi 30mm x 1, phi 40mm x 5, phi 50mm x 20, or phi 60mm x 100.
6. The ultra-wideband light source based on bismuth-erbium co-doped fiber as claimed in claim 1, wherein the ultra-wideband light source is SiO2The ultra-wideband light source is a substrate, ensures good thermal stability and environmental stability of the ultra-wideband light source, and can be compatible with all devices in the existing optical fiber communication.
7. The ultra-wideband light source based on the bismuth-erbium co-doped fiber as claimed in claim 1, wherein the bismuth-erbium co-doped fiber is pumped by pumping light, the fiber design and the doping design enable the ion energy level to split more fine structures, erbium ion superfluorescence with the center wavelength of about 1530nm and superfluorescence radiated by multi-valence bismuth ions are formed, and a high-brightness ultra-wideband fluorescence spectrum with the emission wavelength range of 1400-1700 nm and the emission power of mW magnitude is obtained through the combined action.
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| CN115259652A (en) * | 2022-05-16 | 2022-11-01 | 桂林电子科技大学 | Preparation method of erbium-bismuth co-doped special optical fiber with wide measurement temperature range and high concentration |
| CN117810799A (en) * | 2024-01-03 | 2024-04-02 | 重庆大学 | Bismuth-doped aluminosilicate optical fiber amplifier |
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| CN115259652A (en) * | 2022-05-16 | 2022-11-01 | 桂林电子科技大学 | Preparation method of erbium-bismuth co-doped special optical fiber with wide measurement temperature range and high concentration |
| CN115259652B (en) * | 2022-05-16 | 2024-01-30 | 桂林电子科技大学 | Preparation method of high-concentration erbium-bismuth co-doped special optical fiber with wide measurement temperature range |
| CN115108717A (en) * | 2022-06-02 | 2022-09-27 | 浙江超晶晟锐光电有限公司 | Novel bismuth-erbium co-doped quartz optical fiber preform, application and preparation method |
| CN117810799A (en) * | 2024-01-03 | 2024-04-02 | 重庆大学 | Bismuth-doped aluminosilicate optical fiber amplifier |
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