CN113315598B - EDFA amplifier module with multi-optical fiber collimator - Google Patents
EDFA amplifier module with multi-optical fiber collimator Download PDFInfo
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- CN113315598B CN113315598B CN202110680156.9A CN202110680156A CN113315598B CN 113315598 B CN113315598 B CN 113315598B CN 202110680156 A CN202110680156 A CN 202110680156A CN 113315598 B CN113315598 B CN 113315598B
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- 239000013307 optical fiber Substances 0.000 title claims description 293
- 239000000835 fiber Substances 0.000 claims abstract description 258
- 238000005086 pumping Methods 0.000 claims abstract description 34
- 230000005540 biological transmission Effects 0.000 claims abstract description 31
- 230000003287 optical effect Effects 0.000 claims description 50
- 238000002955 isolation Methods 0.000 claims description 35
- 238000012544 monitoring process Methods 0.000 claims description 24
- 238000002834 transmittance Methods 0.000 claims description 11
- 238000002310 reflectometry Methods 0.000 claims description 10
- 238000003491 array Methods 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 6
- 230000010354 integration Effects 0.000 abstract description 4
- 230000003321 amplification Effects 0.000 description 22
- 238000003199 nucleic acid amplification method Methods 0.000 description 22
- 239000012528 membrane Substances 0.000 description 12
- 229910052691 Erbium Inorganic materials 0.000 description 9
- UYAHIZSMUZPPFV-UHFFFAOYSA-N erbium Chemical compound [Er] UYAHIZSMUZPPFV-UHFFFAOYSA-N 0.000 description 9
- 238000010586 diagram Methods 0.000 description 7
- 238000004891 communication Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000011161 development Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0221—Power control, e.g. to keep the total optical power constant
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/27—Optical coupling means with polarisation selective and adjusting means
- G02B6/2746—Optical coupling means with polarisation selective and adjusting means comprising non-reciprocal devices, e.g. isolators, FRM, circulators, quasi-isolators
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/32—Optical coupling means having lens focusing means positioned between opposed fibre ends
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/29—Repeaters
- H04B10/291—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
- H04B10/293—Signal power control
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Electromagnetism (AREA)
- Lasers (AREA)
Abstract
The invention relates to an EDFA amplifier module with a multi-fiber collimator, which is characterized in that: the EDFA amplifier module comprises: the device comprises a signal light source, at least one pumping light source, a WDM light splitting diaphragm, two groups of multi-fiber collimators, an isolator, at least one erbium-doped fiber, wherein the WDM light splitting diaphragm is high in reflection of the signal light emitted by the pumping light source, the two groups of multi-fiber collimators are used for transmitting the signal light emitted by the signal light source, the isolator, the first multi-fiber collimator, the WDM light splitting diaphragm, the second multi-fiber collimator and the erbium-doped fiber are sequentially arranged to form more than two light paths, and at least one light path and the other light paths have opposite light transmission directions. The invention provides the EDFA module which has compact light path layout, high integration level of discrete devices and small volume.
Description
Technical Field
The invention relates to the field of optical fiber communication, in particular to an EDFA amplifier module with a multi-optical fiber collimator.
Background
Fiber optic amplifiers have become a key device in fiber optic communication systems. The optical fiber amplifier can effectively compensate attenuation caused by long-distance transmission and wave division of signal light, and greatly promotes the development of an optical fiber communication system.
The Erbium-doped fiber amplifier (Erbium-doped Optical FiberAmplifer, EDFA for short) is a key component for long-distance communication, can amplify power of 1550nm of C band, 1480nm of S band and 1610nm of L band, and is widely used in the fields of long-distance optical fiber communication, high-speed communication, optical fiber access cable television and the like.
The EDFA is mainly composed of 5 parts: isolator (ISO), combiner (WDM or Coupler), erbium Doped Fiber (EDF), optical Filter (Optical Filter), pump light source (Pump). The traditional erbium-doped fiber amplifier is formed by connecting individual discrete devices with optical fibers, and the EDFA manufactured by the method has the problems of large volume, high cost and the like.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the EDFA module which has compact optical path layout, high integration level of discrete devices and small volume.
The invention relates to an EDFA amplifier module with a multi-fiber collimator, which is characterized in that: the EDFA amplifier module comprises:
a signal light source which emits signal light;
at least one pumping light source, the wavelength of the pumping light emitted by the pumping light source is different from that of the signal light emitted by the signal light source;
the WDM beam splitting diaphragm is highly reflective to the signal light emitted by the pumping light source and transmits the signal light emitted by the signal light source;
Two groups of multi-fiber collimators: the optical fiber collimator comprises a plurality of optical fibers and collimating lenses which are correspondingly arranged;
an isolator: the isolator comprises two multi-fiber collimators and an isolator core arranged between the two multi-fiber collimators;
at least one erbium-doped fiber: an optical fiber output end and an input end connected to the second multi-optical fiber collimator;
the isolator, the first multi-optical fiber collimator, the WDM beam splitting diaphragm, the second multi-optical fiber collimator and the erbium-doped optical fiber are sequentially arranged to form more than two optical paths, and at least one optical path has an opposite light transmission direction with other optical paths; the signal light emitted by the signal light source is input into a 1 st optical fiber of a first multi-optical fiber collimator along a light transmission direction through an isolator, is condensed and collimated by a collimating lens corresponding to the 1 st optical fiber, is refracted into a WDM light splitting diaphragm, is transmitted to a second multi-optical fiber collimator, is output through the collimating lens corresponding to the 1 st optical fiber and the 1 st optical fiber, and is input into one end of an erbium-doped optical fiber; simultaneously, the pump light source emits pump light to be input into a 4 th optical fiber of a second multi-optical fiber collimator along the other direction of light transmission, the pump light is converged and collimated by a collimating lens corresponding to the 4 th optical fiber and then is refracted into a WDM beam splitting diaphragm, the WDM beam splitting diaphragm is reflected and input into the second multi-optical fiber collimator, and the pump light is output after passing through a collimating lens corresponding to the 1 st optical fiber and then is input into one end of an erbium-doped optical fiber; the signal light amplified by the erbium-doped optical fiber is output at the other end of the erbium-doped optical fiber, is input into the 2 nd optical fiber of the second multi-optical fiber collimator, is condensed and collimated by the collimating lens corresponding to the 2 nd optical fiber, is refracted into the WDM light splitting diaphragm, is transmitted to the first multi-optical fiber collimator, is output after passing through the collimating lens corresponding to the 2 nd optical fiber and the 2 nd optical fiber, and is output by the isolator.
As a further improvement of the scheme, the device is an n-level amplifying module, wherein n is a natural number; the first multi-fiber collimator and the second multi-fiber collimator are both 4n fiber collimators, and the isolator comprises n groups of two fiber collimators and an isolator core arranged between the two fiber collimators; the erbium-doped fiber and the pumping light source are correspondingly arranged in n groups.
As a further improvement of the scheme, the multi-core monitor comprises n+1 photoelectric detectors and corresponding optical fibers, wherein the transmittance of the WDM light splitting membrane to signal light is 98-99%, the reflectivity is 1-2%, the signal light emitted by the signal light source is input into the first 4n optical fiber collimator through the reflected light of the WDM light splitting membrane, is output through the collimating lens and the 4 th optical fiber which are correspondingly arranged on the 4 th optical fiber, and is input into the 1 st photoelectric detector of the multi-core monitor through the multi-optical fiber head to be used for monitoring the input signal light; the signal light amplified by the 1 st group of erbium-doped fibers is input to the second 4n fiber collimator, reflected to a collimating lens and a 3 rd fiber which are correspondingly arranged on a 3 rd fiber of the second 4n fiber collimator after passing through a WDM beam splitting diaphragm, output, input to a 2 nd photoelectric detector of a multi-core monitor after passing through a multi-fiber head, and used for monitoring the signal light amplified by the 1 st group of erbium-doped fibers; the signal light amplified by the nth group of erbium-doped fibers is input to the second 4n optical fiber collimator, reflected to a collimating lens and a 4n-1 optical fiber which are correspondingly arranged on the 4n-1 optical fiber of the second 4n optical fiber collimator after passing through the WDM beam splitting membrane, output, and input to an n+1th photoelectric detector of the multi-core monitor after passing through the multi-optical fiber head to be used for monitoring the signal light amplified by the nth group of erbium-doped fibers.
As another aspect of the present invention, an EDFA amplifier module includes:
a signal light source which emits signal light;
at least one pumping light source, the wavelength of the pumping light emitted by the pumping light source is different from that of the signal light emitted by the signal light source;
the WDM beam splitting diaphragm is highly reflective to the signal light emitted by the pumping light source and transmits the signal light emitted by the signal light source;
two groups of multi-fiber collimators: a first multi-fiber collimator, a second multi-fiber collimator; the multi-fiber collimator comprises a plurality of optical fibers and collimating lenses which are correspondingly arranged;
two sets of wedge angle prisms: the first wedge angle prism group and the second wedge angle prism group;
an isolator: comprising a plurality of separator cores;
at least one erbium-doped fiber: an optical fiber output end and an input end connected to the second multi-optical fiber collimator;
the first multi-fiber collimator, the first wedge angle prism group, the isolator, the second wedge angle prism group, the WDM beam splitting diaphragm, the second multi-fiber collimator and the erbium-doped fiber are sequentially arranged, and the optical fiber collimator has more than two optical paths, and at least one optical path has an opposite light transmission direction with other optical paths; the signal light emitted by the signal light source is condensed and collimated by a collimating lens corresponding to the 4 th optical fiber through the 4 th optical fiber of the first multi-optical fiber collimator along a light transmission direction, then is refracted into a 1 st wedge angle prism in the first wedge angle prism group, the refracted light is changed into horizontal light, then is changed into refracted light by a 1 st isolator core of an isolator, is refracted into a WDM light splitting diaphragm through the 4 th wedge angle prism in the second wedge angle prism group, is transmitted into the second multi-optical fiber collimator, is output after being subjected to a collimating lens corresponding to the 1 st optical fiber and the 1 st optical fiber, and is input into one end of the erbium-doped optical fiber; meanwhile, the pump light emitted by the pump light source passes through a 4 th optical fiber of a second multi-optical fiber collimator along the other direction of light transmission, is condensed and collimated by a collimating lens corresponding to the 4 th optical fiber, is refracted into a WDM (wavelength division multiplexing) beam splitting diaphragm, is reflected by the WDM beam splitting diaphragm and is input into the second multi-optical fiber collimator, is output after passing through a collimating lens corresponding to the 1 st optical fiber and the 1 st optical fiber, and is input into one end of an erbium-doped optical fiber; the signal light amplified by the erbium-doped optical fiber is output at the other end of the erbium-doped optical fiber, is condensed and collimated by a collimating lens arranged corresponding to the 2 nd optical fiber, is refracted into a WDM beam splitting diaphragm, is transmitted to a 3 rd wedge prism of a second wedge prism group, is converted into horizontal light, passes through an isolator, is refracted into a collimating lens arranged corresponding to the 3 rd optical fiber of the first multi-optical fiber collimator by the 2 nd wedge prism of the first wedge prism group, is condensed by the 3 rd optical fiber, is collimated by the 2 nd optical fiber of the first multi-optical fiber collimator, is refracted into the 3 rd wedge prism of the first wedge prism group by the collimating lens arranged corresponding to the 2 nd optical fiber, is converted into the horizontal light by the 2 nd wedge prism of the second wedge prism group after passing through the 2 nd isolator core of the isolator, is refracted into the light, is transmitted into the second multi-optical fiber collimator, is collimated by the 3 rd optical fiber, and is output after being condensed and collimated by the 3 rd optical fiber.
As a further improvement of the scheme, the device is an n-level amplifying module, wherein n is a natural number; the first multi-fiber collimator and the second multi-fiber collimator are both 4n fiber collimators; the separator comprises 2n separation cores; the first wedge angle prism group and the second wedge angle prism group comprise 4n wedge angle prisms; the erbium-doped fiber and the pumping light source are correspondingly arranged in n groups.
As a further improvement of the scheme, the multi-core monitor comprises n+1 photoelectric detectors and converging lenses, wherein the multi-core monitor comprises n+1 group of optical sheets, the transmittance of the n+1 group of optical sheets to signal light is 98-99%, the reflectivity is 1-2%, and the n+1 group of optical sheets are arranged between an isolation core of an isolator and corresponding wedge-angle prisms in a second wedge-angle prism group; the signal light emitted by the signal light source passes through a 1 st isolation core of the isolator, then 1-2% of the signal light is reflected by a 1 st light splitting sheet, and is input into a 1 st photoelectric detector through a converging lens to be used as the monitoring of the input signal light; the signal light amplified by the 1 st group of erbium-doped fibers passes through a 2 nd isolation core of the isolator, then 1-2% of the signal light amplified by the 1 st group of erbium-doped fibers is reflected by a 2 nd light splitting sheet, and is input into a 2 nd photoelectric detector through a converging lens to be used as the signal light amplified by the 1 st group of erbium-doped fibers for monitoring; the signal light amplified by the nth group of erbium-doped fibers passes through the 2 nth isolation core of the isolator, 1-2% of the signal light amplified by the nth group of erbium-doped fibers is reflected by the n+1th light splitting sheet, and is input into the n+1th photoelectric detector through the converging lens to be monitored as the signal light amplified by the nth group of erbium-doped fibers.
As another aspect of the present invention, an EDFA amplifier module includes:
a signal light source which emits signal light;
at least one pumping light source, the wavelength of the pumping light emitted by the pumping light source is different from that of the signal light emitted by the signal light source;
the WDM beam splitting diaphragm is highly reflective to the signal light emitted by the pumping light source and transmits the signal light emitted by the signal light source;
two sets of multi-fiber collimator arrays: the system comprises a first multi-fiber collimator array and a second multi-fiber collimator array, wherein the array consisting of multi-fiber collimators comprises a multi-channel optical fiber array and a multi-channel collimating lens array which is correspondingly arranged;
two sets of wedge angle prisms: the first wedge angle prism group and the second wedge angle prism group;
an isolator: comprising a plurality of separator cores;
at least one erbium-doped fiber: an optical fiber output end and an input end connected to the second multi-optical fiber collimator;
the first multi-fiber collimator array, the isolator, the second wedge-angle prism group, the WDM beam splitting diaphragm, the first wedge-angle prism group, the second multi-fiber collimator array and the erbium-doped fiber are sequentially arranged, and the optical fiber collimator array has more than two optical paths, and at least one optical path and other optical paths have opposite light transmission directions; the signal light emitted by the signal light source is collimated by a collimating lens array of a 1 st channel of a first multi-fiber collimator array along a light transmission direction, passes through a 1 st isolation core of an isolator after being collimated by the collimating lens array of the 1 st channel, is refracted by a 4 th wedge prism in a second wedge prism group to become refracted light, is refracted into a WDM light splitting diaphragm, is transmitted to a 4 th wedge prism in the first wedge prism group to become horizontal light, is output after passing through the collimating lens array of the 1 st channel and the fiber array of the 1 st channel which are correspondingly arranged in the second multi-fiber collimator array, and is input into one end of an erbium-doped fiber; simultaneously, the pumping light emitted by the pumping light source passes through a 4 th channel optical fiber array of a second multi-fiber collimator array along the other direction of light transmission, is collimated by a collimating lens array corresponding to the 4 th channel optical fiber array, then passes through a 1 st wedge angle prism of a first wedge angle prism group, converts horizontal light into refractive light, refracts the refractive light into a WDM light splitting diaphragm, and is reflected by the WDM light splitting diaphragm to be input into the second multi-fiber collimator array, and is output after passing through the collimating lens array corresponding to the 1 st channel optical fiber array and the 1 st channel optical fiber array, and is input into one end of an erbium-doped optical fiber; the signal light amplified by the erbium-doped optical fiber is output in the other end of the erbium-doped optical fiber, is condensed and collimated by a collimating lens array which is arranged corresponding to the 2 nd channel optical fiber array of the second multi-optical fiber collimator array, is subjected to condensation and collimation by a 3 rd wedge angle prism of the first wedge angle prism group, the refracted light is changed into horizontal light, and is refracted into the WDM beam splitting diaphragm, is transmitted to the 3 rd wedge angle prism of the second wedge angle prism group, is changed into horizontal light, passes through the isolator, is subjected to the collimating lens array which is arranged corresponding to the 2 nd channel optical fiber array of the first multi-optical fiber collimator array, is subjected to the collimating lens array which is arranged corresponding to the 3 nd channel optical fiber array of the first multi-optical fiber collimator array, is subjected to collimation by the 2 nd isolator core which is arranged corresponding to the 3 nd channel optical fiber array of the first multi-optical fiber collimator array, is subjected to the 2 nd wedge angle prism of the second wedge angle prism group, is changed into refracted light, is transmitted into the 2 nd wedge angle prism of the second wedge angle prism in the first wedge angle prism group, and is subjected to the refracting light, and is subjected to the collimating lens array which is arranged corresponding to the 3 nd channel optical fiber array of the second multi-optical fiber array.
As a further improvement of the scheme, the device is an n-level amplifying module, wherein n is a natural number; the first multi-fiber collimator array and the second multi-fiber collimator array are both 4n fiber collimator arrays; the separator comprises 2n separation cores; the first wedge angle prism group and the second wedge angle prism group comprise 4n wedge angle prisms; the erbium-doped fiber and the pumping light source are correspondingly arranged in n groups.
As a further improvement of the scheme, the multi-core monitor comprises n+1 photoelectric detectors and converging lenses, wherein the multi-core monitor comprises n+1 groups of optical sheets, the transmittance of the n+1 groups of optical sheets to signal light is 98-99%, and the reflectivity is 1-2%, and the optical sheets are arranged between an isolation core of an isolator and corresponding wedge-angle prisms in a second wedge-angle prism group; the signal light emitted by the signal light source passes through a 1 st isolation core of the isolator, then 1-2% of the signal light is reflected by a 1 st light splitting sheet, and is input into a 1 st photoelectric detector through a converging lens to be used as the monitoring of the input signal light; the signal light amplified by the 1 st group of erbium-doped fibers passes through a 2 nd isolation core of the isolator, then 1-2% of the signal light amplified by the erbium-doped fibers is reflected by a 2 nd light splitting sheet, and is input into a 2 nd photoelectric detector through a converging lens to be used for monitoring the signal light amplified by the 1 st group of erbium-doped fibers; the signal light amplified by the n-th group of erbium-doped fibers passes through the n+1th isolation core of the isolator, 1-2% of the signal light amplified by the erbium-doped fibers is reflected by the n+1th light splitting sheet, and is input into the n+1th photoelectric detector through the converging lens to be used for monitoring the signal light amplified by the n-th group of erbium-doped fibers.
As a further development of the application, the monitors are mounted on the same monitor stand.
Compared with the prior art, the module has compact light path layout, high integration level of discrete devices and small volume. The device is not increased even if the multistage amplification is carried out, and the volume of the EDFA module is kept unchanged.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
FIG. 1 is a schematic diagram of a multi-fiber in-line arrangement provided by the present application;
FIG. 2 is a schematic view of a multi-fiber circular arrangement according to the present application;
FIG. 3 is a schematic diagram of an EDFA amplifier module with a four-fiber collimator according to a first embodiment of the present application;
fig. 4 is a schematic diagram of an optical path of an n-stage amplifier module according to a first embodiment of the present application;
fig. 5 is a schematic diagram of an optical path of an EDFA amplifier module with a four-fiber collimator according to a second embodiment of the present application;
fig. 6 is a schematic diagram of an optical path of an n-stage amplifier module according to a second embodiment of the present application;
fig. 7 is a schematic diagram of an optical path of an EDFA amplifier module with a four-fiber collimator according to a third embodiment of the present application;
Fig. 8 is a schematic diagram of an optical path of an n-stage amplifier module according to a third embodiment of the present invention.
Detailed Description
Various embodiments of the present invention are disclosed in the following figures.
Referring to fig. 1 and 2, since the optical fibers in the multi-fiber collimator have various arrangements, such as a straight or circumferentially distributed arrangement; in order to more clearly illustrate the present invention, various embodiments of the present invention will be described below by taking a straight line as an example.
Referring to fig. 3, in a first embodiment, an EDFA amplifier module with a four-fiber collimator, the first four-fiber collimator includes:
a signal light source 1, the signal light source 1 emitting signal light with a wavelength of 1550nm;
a set of pump light sources 61, the wavelength of the pump light emitted by the pump light sources 61 is different from the wavelength of the signal light emitted by the signal light sources, and the wavelength of the pump light is 980nm;
980/1550nm WDM light-splitting membrane 5, high reflection to 980nm light, transmission to 1550nm light, 98-99% transmittance and 1-2% reflectance;
two sets of four fiber collimators: a first four-fiber collimator 3, a second four-fiber collimator 4, which respectively comprise four optical fibers 311, 312, 313, 314, 411, 412, 413, 414 and correspondingly arranged collimating lenses;
the isolator 2: comprising two dual fiber collimators and an isolator core 211 disposed between the two dual fiber collimators;
A set of erbium doped fibers 71: an optical fiber output end and an input end connected to the second multi-fiber collimator 4;
the isolator 2, the first four-fiber collimator 3, the WDM beam splitting diaphragm 5, the second four-fiber collimator 4 and the erbium-doped fiber 71 are sequentially arranged to form more than two light paths, and at least one light path has an opposite light transmission direction with other light paths; the signal light emitted by the signal light source 1 is input into the 1 st optical fiber 311 of the first four optical fiber collimator 3 along the light transmission direction through the isolator 2, is condensed and collimated by the collimating lens corresponding to the 1 st optical fiber, is refracted into the WDM light splitting membrane 5, is transmitted to the second four optical fiber collimator 4, is output after passing through the collimating lens corresponding to the 1 st optical fiber 411 and the 1 st optical fiber 411, and is input into one end of the erbium-doped optical fiber 71; simultaneously, the pump light source 61 emits pump light to be input into the 4 th optical fiber 414 of the second fourth optical fiber collimator 4 along the other direction of light transmission, and then the pump light is condensed and collimated by a collimating lens corresponding to the 4 th optical fiber 414 and then is refracted into the WDM light splitting diaphragm 5, and is reflected by the WDM light splitting diaphragm 5 to be input into the second fourth optical fiber collimator 4, is output after passing through a collimating lens corresponding to the 1 st optical fiber 411 and the 1 st optical fiber 411, and is input into one end of the erbium-doped optical fiber 71; the signal light amplified by the erbium-doped fiber 71 is output at the other end of the erbium-doped fiber 71, is input to the 2 nd fiber 412 of the second four-fiber collimator 4, is condensed and collimated by the collimating lens arranged corresponding to the 2 nd fiber 412, is refracted into the WDM light splitting diaphragm 5, is transmitted to the first four-fiber collimator 3, is output through the collimating lens corresponding to the 2 nd fiber 312 and the 2 nd fiber 312, and is output by the isolator 2.
A further improvement of the first embodiment further includes a monitor 8, where the monitor 8 includes 2 photodetectors 811 and 812 and a multi-fiber head 82 disposed correspondingly, the signal light emitted by the signal light source 1 is reflected to the first four-fiber collimator 3 through the WDM light splitting membrane 5, is output through a collimating lens disposed correspondingly to the 4 th optical fiber 314 and the 4 th optical fiber 314, and is input to the 1 st photodetector 811 of the monitor 8 through the multi-fiber head 82 to be used as the monitor of the input signal light; the signal light amplified by the erbium-doped fiber 71 is input to the second fourth fiber collimator 4, reflected to the collimating lens and the 3 rd fiber 413 correspondingly arranged on the 3 rd fiber 413 of the second fourth fiber collimator 4 after passing through the WDM optical splitting diaphragm 5, output, and input to the 2 nd photodetector 812 of the monitor 8 through the multi-fiber head 82 to be monitored as the signal light amplified by the erbium-doped fiber 71.
Referring to fig. 4, the n-stage amplification of the first embodiment is an n-stage amplification module, where n is a natural number; the method comprises the steps that a first four-fiber collimator is changed into a first 4 n-fiber collimator, a second four-fiber collimator is changed into a second 4 n-fiber collimator, and the second four-fiber collimator comprises 4n fibers and collimating lenses which are correspondingly arranged; the number of the isolation cores in the isolator 2 is increased to n; the pump light source 61 and the erbium doped fiber 71 are added from one group to n groups, i.e., the pump light source 6n and the erbium doped fiber 7n are not changed in other elements and the element positional relationship is not changed. Each amplification stage of the n-stage amplification module is transmitted according to the optical path in the first embodiment, namely, each 4 optical paths form one-stage amplification.
The n-level amplification of the first embodiment is further improved, and the n-level amplification further comprises a monitor 8, wherein the monitor 8 comprises n+1 photodetectors 811, 812 … (n+1) and a multi-optical-fiber head 82 correspondingly arranged, the signal light emitted by the signal light source 1 is reflected by the WDM light splitting membrane 5 and then is input into the first 4n optical-fiber collimator, is output after passing through a collimating lens correspondingly arranged on the 4 th optical fiber 314 and the 4 th optical fiber 314, and is input into the 1 st photodetector 811 of the monitor 8 through the multi-optical-fiber head 82 to be used for monitoring the input signal light; the signal light amplified by the 1 st group of erbium-doped fibers 61 is input to the second 4n fiber collimator 4, reflected to a collimating lens and a 3 rd fiber 413 which are correspondingly arranged on a 3 rd fiber 413 of the second 4n fiber collimator 4 after passing through the WDM optical splitting diaphragm 5, and output, and then input to a 2 nd photodetector 812 of the monitor 8 through the multi-fiber head 82 to be used as the monitor of the signal light amplified by the 1 st group of erbium-doped fibers 71; the signal light amplified by the nth group of erbium-doped fibers is input to the second 4n optical fiber collimator 4, reflected to a collimating lens and the 4n3 optical fiber correspondingly arranged by the 4n3 optical fiber of the second 4n optical fiber collimator after passing through the WDM beam splitting membrane, output, and input to the n+1th photoelectric detector of the multi-core monitor through the multi-fiber head 82 to be used for monitoring the signal light amplified by the nth group of erbium-doped fibers.
Referring to fig. 5, in embodiment two, the EDFA amplifier module includes:
a signal light source 1, the signal light source 1 emitting signal light with a wavelength of 1550nm;
a set of pump light sources 61, the wavelength of the pump light emitted by the pump light sources 61 is different from the wavelength of the signal light emitted by the signal light sources, and the wavelength of the pump light is 980nm;
980/1550nm WDM light-splitting membrane 5, high reflection to 980nm light and transmission to 1550nm light;
two sets of four fiber collimators: a first four-fiber collimator 3, a second four-fiber collimator 4, which respectively comprise four optical fibers 311, 312, 313, 314, 411, 412, 413, 414 and correspondingly arranged collimating lenses;
a set of erbium doped fibers 71: an optical fiber output end and an input end connected to the second multi-fiber collimator 4;
two sets of wedge angle prisms: a first wedge angle prism group 10 and a second wedge angle prism group 11;
the isolator 2: comprising a first separator core 211 and a second separator core 212;
the first four-fiber collimator 3, the first wedge angle prism group 10, the isolator 2, the second wedge angle prism group 11, the WDM light splitting membrane 5, the second four-fiber collimator 4 and the erbium-doped fiber 71 are sequentially arranged, and the optical fiber collimator has more than two optical paths, and at least one optical path has an opposite light transmission direction with other optical paths; the signal light emitted by the signal light source 1 is condensed and collimated by the 4 th optical fiber 314 of the first fourth optical fiber collimator 3 along a light transmission direction, then is refracted into the 1 st wedge angle prism 1011 in the first wedge angle prism group 10 by the collimating lens corresponding to the 4 th optical fiber 314, the refracted light is changed into horizontal light, then is changed into refracted light by the 4 st wedge angle prism 1114 in the second wedge angle prism group 11 after passing through the 1 st isolator core 211 of the isolator 2, is refracted into the WDM light splitting diaphragm 5, is transmitted into the second fourth optical fiber collimator 4, is output after passing through the collimating lens corresponding to the 1 st optical fiber 411 and the 1 st optical fiber 411, and is input into one end of the erbium-doped optical fiber 71; meanwhile, the pump light emitted by the pump light source 61 is focused and collimated by a collimating lens corresponding to the 4 th optical fiber 414 and then refracted into the WDM beam splitting diaphragm 5 through the second fourth optical fiber collimator 4 along the other direction of light transmission, reflected by the WDM beam splitting diaphragm 5 and input into the second fourth optical fiber collimator 4, output through the collimating lens corresponding to the 1 st optical fiber 414 and the 1 st optical fiber 414, and input into one end of the erbium-doped optical fiber 71; the signal light amplified by the erbium-doped fiber 71 is output at the other end of the erbium-doped fiber 71, is condensed and collimated by a collimating lens arranged corresponding to the 2 nd fiber 412, is refracted into the WDM spectral diaphragm 5, is transmitted to a 3 rd wedge prism 1113 of the second wedge prism group 11, changes the refracted light into horizontal light, passes through the isolator 2, is converted into refracted light by a 2 nd wedge prism 1012 of the first wedge prism group 10, is refracted into a collimating lens arranged corresponding to a 3 rd fiber 313 of the first four fiber collimator 3, is condensed by a 2 nd fiber 312 of the first four fiber collimator 3 after passing through a 3 rd fiber 313, is refracted into a 3 rd wedge prism 1013 in the first wedge prism group 10 after being condensed and collimated by a collimating lens arranged corresponding to the 2 nd fiber 312, changes the obliquely incident light into horizontal light, is transmitted into the WDM diaphragm 413 through a 2 nd isolator core 212 of the isolator 2, and is refracted into the horizontal light by a 2 nd wedge prism 1112 in the second wedge prism group 11, is transmitted into the collimating lens 413 after passing through the collimating lens arranged corresponding to the 2 nd fiber 313, and is collimated by the fourth fiber 3.
As a further improvement of the second embodiment, the optical fiber display device further comprises a monitor 8 and 2 groups of optical sheets 121 and 122, wherein the optical sheets 121 and 122 transmit light of 1550nm, the transmittance is 98-99%, the reflectivity is 1-2%, the monitor 8 comprises 2 photodetectors 811 and 812 and a converging lens 83, and the two groups of optical sheets 121 and 122 are arranged between the isolation cores 211 and 212 of the isolator 2 and the corresponding wedge-angle prisms in the second wedge-angle prism group 11; the signal light emitted by the signal light source 1 passes through the 1 st isolation core 211 of the isolator 2, and then 1-2% of the signal light reflected by the light splitting sheet 121 is input into the 1 st photodetector 811 of the photodetector 8 as the monitoring of the input signal light through the converging lens 83; the signal light amplified by the erbium-doped fiber 71 passes through the 2 nd isolation core 212 of the isolator 2, and then 1-2% of the signal light amplified by the erbium-doped fiber 71 is reflected by the 2 nd component light sheet 122, and is input into the 2 nd photodetector 812 through the converging lens 83 as the monitoring of the signal light amplified by the erbium-doped fiber 71.
Referring to fig. 6, the n-stage amplification of the second embodiment is an n-stage amplification module, where n is a natural number; the method comprises the steps that a first four-fiber collimator is changed into a first 4 n-fiber collimator, a second four-fiber collimator is changed into a second 4 n-fiber collimator, and the second four-fiber collimator comprises 4n fibers and collimating lenses which are correspondingly arranged; the separator 2 contains 2n separation cores; the first wedge angle prism group comprises 4n wedge angle prisms, and the second wedge angle prism group comprises 4n wedge angle prisms; the pump light source 61 and the erbium doped fiber 71 are added from one group to n groups, i.e., the pump light source 6n and the erbium doped fiber 7n are not changed in other elements and the element positional relationship is not changed. Each amplification stage of the n-stage amplification module is transmitted according to the optical path described in the second embodiment, namely, each 4 optical paths form a first-stage amplification.
The n-level amplification further comprises a monitor 8 and n+1 component light sheets, wherein the light sheets transmit light of 1550nm, the transmittance is 98-99%, the reflectivity is 1-2%, the monitor 8 comprises n+1 photodetectors 811, 812 … (n+1) and a converging lens 83, and the n+1 component light sheets 121, 122 … (n+1) are arranged between isolation cores 211, 212 … 21 (2 n) of the isolator 2 and corresponding wedge-angle prisms in the second wedge-angle prism group 11; the signal light emitted by the signal light source 1 passes through the 1 st isolation core 211 of the isolator 2, then 1-2% of the signal light is reflected by the light splitting sheet 121, and is input into the 1 st photodetector 811 through the converging lens 83 to be used as the monitoring of the input signal light; the signal light amplified by the 1 st group of erbium-doped fiber 71 passes through the 2 nd isolation core 212 of the isolator 2, 1-2% of the signal light amplified by the 1 st group of erbium-doped fiber 71 is reflected by the light splitting sheet 122, and is input into the 2 nd photodetector 812 through the converging lens 83 to be monitored as the signal light amplified by the 1 st group of erbium-doped fiber 71; the signal light amplified by the n-th group of erbium-doped fibers 7n passes through the 2 n-th isolation core of the isolator 2, 1-2% of the signal light amplified by the n-th group of erbium-doped fibers 7n is reflected by the light splitting sheet 12 (n+1), and is input into the n+1th photodetector 81 (n+1) through the converging lens 83 to be monitored as the signal light amplified by the n-th group of erbium-doped fibers 7 n.
Referring to fig. 7, in a third embodiment, the method is characterized in that: the EDFA amplifier module comprises:
a signal light source 1, the signal light source 1 emitting signal light with a wavelength of 1550nm;
a set of pump light sources 61, the wavelength of the pump light emitted by the pump light sources 61 is different from the wavelength of the signal light emitted by the signal light sources, and the wavelength of the pump light is 980nm;
980/1550nm WDM light-splitting membrane 5, high reflection to 980nm light and transmission to 1550nm light;
two sets of four fiber collimator arrays: the optical fiber collimator comprises a first four-fiber collimator array and a second four-fiber collimator array, wherein the four-fiber collimator array comprises an array formed by four fiber collimators 3 and 4, and comprises an optical fiber array with 4 channels and a collimating lens array with four channels which are correspondingly arranged;
two sets of wedge angle prisms: a first wedge angle prism group 8 and a second wedge angle prism group 9;
the isolator 2: comprising two separator cores 211, 212;
erbium-doped fiber 71: an optical fiber output end and an input end connected to the second four optical fiber collimator;
the first four-fiber collimator 3 array, the isolator 2, the second wedge angle prism group 11, the WDM light splitting diaphragm 5, the first wedge angle prism group 10, the second four-fiber collimator 4 array and the erbium-doped fiber 71 are sequentially arranged, and have more than two light paths, and at least one light path has an opposite light transmission direction with other light paths; the signal light emitted by the signal light source 1 is collimated by the 1 st channel optical fiber 311 array of the first fourth optical fiber collimator array along a light transmission direction, then passes through the 1 st isolation core 211 of the isolator 2 after being collimated by the collimating lens array corresponding to the 1 st channel optical fiber 311 array, is changed into refracted light by the 4 th wedge prism 1114 in the second wedge prism group 11, is refracted into the WDM light splitting diaphragm 5, is transmitted to the 4 th wedge prism 1014 in the first wedge prism group 10, is changed into horizontal light, is output by the collimating lens array corresponding to the 1 st channel optical fiber 411 array and the 1 st channel optical fiber 411 array in the second fourth optical fiber collimator 4 array, and is input into one end of the erbium-doped optical fiber 71; meanwhile, the pump light emitted by the pump light source 61 passes through a 4 th channel optical fiber 414 array of a second fourth optical fiber collimator 4 array along the other direction of light transmission, is collimated by a collimating lens array corresponding to the 4 th channel optical fiber 414 array, then passes through a 1 st wedge prism 1011 of the first wedge prism group 10, converts horizontal light into refractive light, refracts into a WDM light splitting diaphragm 5, is reflected by the WDM light splitting diaphragm 5 and is input into the second fourth optical fiber collimator 4 array, and is output after passing through a collimating lens array corresponding to the 1 st channel optical fiber 411 array and a 1 st channel optical fiber 411 array, and is input into one end of the erbium-doped optical fiber 71; the signal light amplified by the erbium-doped optical fiber 71 is output at the other end of the erbium-doped optical fiber 71, is condensed and collimated by the 2 nd channel optical fiber 412 array of the second fourth optical fiber collimator 4 array, is collimated by the collimating lens array corresponding to the 2 nd channel optical fiber 412 array, is refracted into the WDM light splitting membrane 5 by the 3 rd wedge prism 1013 of the first wedge prism group 10, is transmitted to the 3 rd wedge prism 1113 of the second wedge prism group 11 to convert the refracted light into the horizontal light, passes through the isolator 2, is collimated by the collimating lens array corresponding to the 2 nd channel optical fiber 312 array of the first fourth optical fiber collimator 3 array, is collimated by the collimating lens array corresponding to the 3 rd channel optical fiber 313 array of the first fourth optical fiber collimator 3 array, is input to the 2 nd isolator core 212 of the isolator 2, is transmitted to the 2 nd wedge prism 1112 of the second wedge prism group 11, is refracted into the horizontal light, is refracted into the 2 nd wedge prism 1012 of the second wedge prism group 11, is transmitted to the collimating lens array corresponding to the fourth wedge prism 2, and is collimated by the collimating lens 313 array corresponding to the 2 nd channel optical fiber array of the fourth optical fiber collimator 3.
As a further improvement of the third embodiment, the optical fiber display device further comprises a monitor 8 and 2 groups of optical sheets 121 and 122, wherein the optical sheets 121 and 122 transmit light of 1550nm, the transmittance is 98-99%, the reflectivity is 1-2%, the monitor 8 comprises 2 photodetectors 811 and 812 and a converging lens 83, and the two groups of optical sheets 121 and 122 are arranged between the isolation cores 211 and 212 of the isolator 2 and the corresponding wedge-angle prisms in the second wedge-angle prism group 11; the signal light emitted by the signal light source 1 passes through the 1 st isolation core 211 of the isolator 2, 1-2% of the signal light is reflected by the light splitting sheet 121, and is input into the 1 st photodetector 811 through the converging lens 83 to be used as the monitoring of the input signal light; the signal light amplified by the erbium-doped fiber 71 passes through the 2 nd isolation core 212 of the isolator 2, 1-2% of the signal light amplified by the erbium-doped fiber 71 is reflected by the beam splitter 122, and is input into the 2 nd photodetector 812 as the monitoring of the signal light amplified by the erbium-doped fiber 71 through the converging lens 83.
Referring to fig. 8, the n-stage amplification of the third embodiment is an n-stage amplification module, where n is a natural number; the method comprises the steps that a first four-fiber collimator is changed into a first 4 n-fiber collimator, a second four-fiber collimator is changed into a second 4 n-fiber collimator, and the second four-fiber collimator comprises 4n fibers and collimating lenses which are correspondingly arranged; the separator 2 contains 2n separation cores; the first wedge angle prism group comprises 4n wedge angle prisms, and the second wedge angle prism group comprises 4n wedge angle prisms; the pump light source 61 and the erbium doped fiber 71 are added from one group to n groups, i.e., the pump light source 6n and the erbium doped fiber 7n are not changed in other elements and the element positional relationship is not changed. Each amplification stage of the n-stage amplification module is transmitted according to the optical path described in the third embodiment, namely, each 4 optical paths form a first-stage amplification.
The n-level amplification of the third embodiment is further improved, and the n-level amplification further comprises a monitor 8 and n+1 component light sheets, wherein the light sheets transmit light of 1550nm, the transmittance is 98-99%, the reflectivity is 1-2%, the monitor 8 comprises n+1 photodetectors 811, 812 … (n+1) and a converging lens 83, and the n+1 component light sheets 121, 122 … (n+1) are arranged between isolation cores 211, 212 … 21 (2 n) of the isolator 2 and corresponding wedge-angle prisms in the second wedge-angle prism group 11; the signal light emitted by the signal light source 1 passes through the 1 st isolation core 211 of the isolator 2, 1-2% of the signal light is reflected by the light splitting sheet 121, and is input into the 1 st photodetector 811 through the converging lens 83 to be used as the monitoring of the input signal light; the signal light amplified by the 1 st group of erbium-doped fiber 71 passes through the 2 nd isolation core 212 of the isolator 2, 1-2% of the signal light amplified by the 1 st group of erbium-doped fiber 71 is reflected by the beam splitter 122, and is input into the 2 nd photodetector 812 through the converging lens 83 to be monitored as the signal light amplified by the 1 st group of erbium-doped fiber 71; the signal light amplified by the n-th group of erbium-doped fibers 7n passes through the 2 n-th isolation core of the isolator 2, 1-2% of the signal light amplified by the n-th group of erbium-doped fibers 7n is reflected by the light splitting sheet 12 (n+1), and is input into the n+1th photodetector 81 (n+1) through the converging lens 83 to be monitored as the signal light amplified by the n-th group of erbium-doped fibers 7 n.
The monitor 8 in the above embodiments is mounted on the same monitor stand 9.
In the above embodiments, the magnetic rings of the plurality of isolation cores in the isolator 2 may be rectangular inner holes, or may be strip-shaped magnetic blocks.
Compared with the prior art, the module has compact light path layout, high integration level of discrete devices and small volume. The device is not increased even if the multistage amplification is carried out, and the volume of the EDFA module is kept unchanged.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. An EDFA amplifier module with a multi-fiber collimator, characterized by: the EDFA amplifier module comprises:
a signal light source which emits signal light;
at least one pumping light source, the wavelength of the pumping light emitted by the pumping light source is different from that of the signal light emitted by the signal light source;
the WDM beam splitting diaphragm is highly reflective to the signal light emitted by the pumping light source and transmits the signal light emitted by the signal light source;
Two groups of multi-fiber collimators: the optical fiber collimator comprises a first multi-optical fiber collimator and a second multi-optical fiber collimator, wherein the first multi-optical fiber collimator and the second multi-optical fiber collimator comprise multi-optical fibers and collimating lenses which are correspondingly arranged; the first multi-fiber collimator and the second multi-fiber collimator are both 4n fiber collimators, wherein n is a natural number;
an isolator:
the isolator comprises two multi-fiber collimators and an isolator core arranged between the two multi-fiber collimators;
at least one erbium-doped fiber: an optical fiber output end and an input end connected to the second multi-optical fiber collimator;
the isolator, the first multi-optical fiber collimator, the WDM beam splitting diaphragm, the second multi-optical fiber collimator and the erbium-doped optical fiber are sequentially arranged to form more than two optical paths, and at least one optical path has an opposite light transmission direction with other optical paths; the signal light emitted by the signal light source is input into a 1 st optical fiber of a first multi-optical fiber collimator along a light transmission direction through an isolator, is condensed and collimated by a collimating lens arranged corresponding to the 1 st optical fiber of the first multi-optical fiber collimator, is refracted into a WDM light splitting diaphragm, is transmitted to a second multi-optical fiber collimator, is output after passing through a collimating lens arranged corresponding to the 1 st optical fiber of the second multi-optical fiber collimator and the 1 st optical fiber, and is input into one end of an erbium-doped optical fiber; simultaneously, the pump light source emits pump light to be input into a 4 th optical fiber of a second multi-optical fiber collimator along the other direction of light transmission, the pump light is condensed and collimated by a collimating lens corresponding to the 4 th optical fiber of the second multi-optical fiber collimator and then is refracted into a WDM beam splitting diaphragm, the WDM beam splitting diaphragm reflects the pump light to be input into the second multi-optical fiber collimator, and the pump light is output after passing through a collimating lens corresponding to the 1 st optical fiber of the second multi-optical fiber collimator and the 1 st optical fiber, and then is input into one end of the erbium-doped optical fiber; the signal light amplified by the erbium-doped optical fiber is output at the other end of the erbium-doped optical fiber, is input into the 2 nd optical fiber of the second multi-optical fiber collimator, is condensed and collimated by a collimating lens arranged corresponding to the 2 nd optical fiber of the second multi-optical fiber collimator, is refracted into the WDM light splitting diaphragm, is transmitted to the first multi-optical fiber collimator, is output after passing through a collimating lens corresponding to the 2 nd optical fiber of the first multi-optical fiber collimator and the 2 nd optical fiber, and is output by the isolator.
2. An EDFA amplifier module with a multi-fiber collimator according to claim 1, characterized in that: the system is an n-level amplifying module; the isolator comprises n groups of two optical fiber collimators and an isolator core arranged between the two optical fiber collimators; the erbium-doped fiber and the pumping light source are correspondingly arranged in n groups.
3. An EDFA amplifier module with a multi-fiber collimator according to claim 2, characterized in that: the multi-core monitor comprises n+1 photoelectric detectors and multi-fiber heads correspondingly arranged, the transmittance of the WDM light splitting diaphragm to signal light is 98-99%, the reflectivity is 1-2%, the signal light emitted by the signal light source is reflected by the WDM light splitting diaphragm and then is input into a first 4n optical fiber collimator, and is output after passing through a collimating lens and a 4 th optical fiber correspondingly arranged on a 4 th optical fiber of the first 4n optical fiber collimator, and then is input into a 1 st photoelectric detector of the multi-core monitor through the multi-fiber heads to be used for monitoring the input signal light; the signal light amplified by the 1 st group of erbium-doped fibers is input into a second 4n optical fiber collimator, reflected to a collimating lens and a 3 rd optical fiber which are correspondingly arranged on a 3 rd optical fiber of the second 4n optical fiber collimator after passing through a WDM light splitting diaphragm, output, and input into a 2 nd photoelectric detector of a multi-core monitor through a multi-optical fiber head to be used for monitoring the signal light amplified by the 1 st group of erbium-doped fibers; the signal light amplified by the nth group of erbium-doped fibers is input to a second 4n optical fiber collimator, reflected to a collimating lens and a 4n-1 optical fiber which are correspondingly arranged on the 4n-1 optical fiber of the second 4n optical fiber collimator after passing through a WDM light splitting diaphragm, output, and input to an n+1th photoelectric detector of a multi-core monitor through an optical fiber head to be used for monitoring the signal light amplified by the nth group of erbium-doped fibers.
4. An EDFA amplifier module with a multi-fiber collimator, characterized by: the EDFA amplifier module comprises:
a signal light source which emits signal light;
at least one pumping light source, the wavelength of the pumping light emitted by the pumping light source is different from that of the signal light emitted by the signal light source;
the WDM beam splitting diaphragm is highly reflective to the signal light emitted by the pumping light source and transmits the signal light emitted by the signal light source;
two groups of multi-fiber collimators: a first multi-fiber collimator, a second multi-fiber collimator; the first multi-fiber collimator and the second multi-fiber collimator comprise multi-fibers and collimating lenses which are correspondingly arranged; the first multi-fiber collimator and the second multi-fiber collimator are both 4n fiber collimators, wherein n is a natural number;
two sets of wedge angle prisms: the first wedge angle prism group and the second wedge angle prism group;
an isolator: comprising a plurality of separator cores;
at least one erbium-doped fiber: an optical fiber output end and an input end connected to the second multi-optical fiber collimator;
the first multi-fiber collimator, the first wedge angle prism group, the isolator, the second wedge angle prism group, the WDM beam splitting diaphragm, the second multi-fiber collimator and the erbium-doped fiber are sequentially arranged, and the optical fiber collimator has more than two optical paths, and at least one optical path has an opposite light transmission direction with other optical paths; the signal light emitted by the signal light source is focused and collimated by a collimating lens corresponding to the 4 th optical fiber of the first multi-optical fiber collimator, then is refracted into a 1 st wedge angle prism in the first wedge angle prism group, the refracted light is changed into horizontal light, then passes through a 1 st isolator core of the isolator, the horizontal light is changed into refracted light by the 4 th wedge angle prism in the second wedge angle prism group, is refracted into a WDM light splitting diaphragm, is transmitted into the second multi-optical fiber collimator, is output after passing through a collimating lens corresponding to the 1 st optical fiber of the second multi-optical fiber collimator and the 1 st optical fiber, and is input into one end of the erbium-doped optical fiber; meanwhile, the pump light emitted by the pump light source passes through a 4 th optical fiber of the second multi-optical fiber collimator along the other direction of light transmission, is condensed and collimated by a collimating lens corresponding to the 4 th optical fiber of the second multi-optical fiber collimator, is refracted into a WDM beam splitting diaphragm, is reflected by the WDM beam splitting diaphragm and is input into the second multi-optical fiber collimator, is output after passing through a collimating lens corresponding to the 1 st optical fiber of the second multi-optical fiber collimator and the 1 st optical fiber, and is input into one end of the erbium-doped optical fiber; the signal light amplified by the erbium-doped optical fiber is output in the other end of the erbium-doped optical fiber, is condensed and collimated by a collimating lens arranged corresponding to the 2 nd optical fiber of the second multi-optical fiber collimator, is refracted into the WDM light splitting diaphragm, is transmitted to a 3 rd wedge prism of the second wedge prism group, converts the refracted light into horizontal light, passes through an isolator, is refracted into the refracted light by the 2 nd wedge prism of the first wedge prism group, is focused by a collimating lens arranged corresponding to the 3 rd optical fiber of the first multi-optical fiber collimator, is condensed and collimated by the 2 nd optical fiber of the first multi-optical fiber collimator by the collimating lens arranged corresponding to the 2 nd optical fiber of the first multi-optical fiber collimator, is refracted into the 3 rd wedge prism of the first wedge prism group, converts the obliquely incident light into the horizontal light, passes through a 2 nd isolator core of the isolator, is refracted by the 2 nd wedge prism of the second wedge prism group, is transmitted into the light, and is collimated by the 3 nd optical fiber of the second multi-optical fiber collimator, and is transmitted to the second multi-optical fiber collimator.
5. An EDFA amplifier module with a multi-fiber collimator according to claim 4, characterized in that: the system is an n-level amplifying module; the separator comprises 2n separation cores; the first wedge angle prism group and the second wedge angle prism group comprise 4n wedge angle prisms; the erbium-doped fiber and the pumping light source are correspondingly arranged in n groups.
6. An EDFA amplifier module with a multi-fiber collimator according to claim 5, characterized in that: the multi-core monitor comprises n+1 photoelectric detectors and converging lenses, the multi-component light sheet is n+1 component light sheets, the transmittance of the n+1 component light sheets to signal light is 98-99% and the reflectivity is 1-2%, and the n+1 component light sheets are arranged between the isolation cores of the isolators and the corresponding wedge-angle prisms in the second wedge-angle prism group; the signal light emitted by the signal light source passes through a 1 st isolation core of the isolator, then 1-2% of the signal light is reflected by a 1 st light splitting sheet, and is input into a 1 st photoelectric detector through a converging lens to be used as the monitoring of the input signal light; the signal light amplified by the 1 st group of erbium-doped fibers passes through a 2 nd isolation core of the isolator, then 1-2% of the signal light amplified by the 1 st group of erbium-doped fibers is reflected by a 2 nd light splitting sheet, and is input into a 2 nd photoelectric detector through a converging lens to be used as the signal light amplified by the 1 st group of erbium-doped fibers for monitoring; the signal light amplified by the n-th group of erbium-doped fibers passes through the 2 n-th isolation core of the isolator, 1-2% of the signal light amplified by the n-th group of erbium-doped fibers is reflected by the n+1th light splitting sheet, and is input into the n+1th photoelectric detector through the converging lens to be monitored as the signal light amplified by the n-th group of erbium-doped fibers.
7. An EDFA amplifier module with a multi-fiber collimator array, characterized by: the EDFA amplifier module comprises:
a signal light source which emits signal light;
at least one pumping light source, the wavelength of the pumping light emitted by the pumping light source is different from that of the signal light emitted by the signal light source;
the WDM beam splitting diaphragm is highly reflective to the signal light emitted by the pumping light source and transmits the signal light emitted by the signal light source;
two sets of multi-fiber collimator arrays: the system comprises a first multi-fiber collimator array and a second multi-fiber collimator array, wherein the first multi-fiber collimator array and the second multi-fiber collimator array are arrays formed by multi-fiber collimators and comprise a multi-channel optical fiber array and a multi-channel collimating lens array which are correspondingly arranged; the first multi-fiber collimator array and the second multi-fiber collimator array are both 4n fiber collimator arrays, wherein n is a natural number;
two sets of wedge angle prisms: the first wedge angle prism group and the second wedge angle prism group;
an isolator: comprising a plurality of separator cores;
at least one erbium-doped fiber: an optical fiber output end and an input end connected to the second multi-optical fiber collimator;
the first multi-fiber collimator array, the isolator, the second wedge-angle prism group, the WDM beam splitting diaphragm, the first wedge-angle prism group, the second multi-fiber collimator array and the erbium-doped fiber are sequentially arranged, and the optical fiber collimator array has more than two optical paths, and at least one optical path and other optical paths have opposite light transmission directions; the signal light emitted by the signal light source passes through the 1 st channel optical fiber array of the first multi-fiber collimator array along a light transmission direction, is collimated by the collimating lens array corresponding to the 1 st channel optical fiber array of the first multi-fiber collimator array, passes through the 1 st isolation core of the isolator, then is converted into refracted light by the 4 th wedge angle prism in the second wedge angle prism group, is refracted into the WDM light splitting diaphragm, is transmitted to the 4 th wedge angle prism in the first wedge angle prism group, is converted into horizontal light, passes through the second multi-fiber collimator array, is output after passing through the collimating lens array corresponding to the 1 st channel optical fiber array of the second multi-fiber collimator array and the 1 st channel optical fiber array, and is input into one end of the erbium-doped optical fiber; simultaneously, the pump light emitted by the pump light source passes through the 4 th channel optical fiber array of the second multi-optical fiber collimator array along the other direction of light transmission, is collimated by the collimating lens array corresponding to the 4 th channel optical fiber array of the second multi-optical fiber collimator array, then is converted into refractive light through the 1 st wedge angle prism of the first wedge angle prism group, is refracted into the WDM beam splitting diaphragm, is reflected by the WDM beam splitting diaphragm and is input into the second multi-optical fiber collimator array, is output after passing through the collimating lens array corresponding to the 1 st channel optical fiber array of the second multi-optical fiber collimator array and the 1 st channel optical fiber array, and is input into one end of the erbium-doped optical fiber; the signal light amplified by the erbium-doped optical fiber is output in the other end of the erbium-doped optical fiber, is condensed and collimated by a collimating lens array arranged corresponding to the 2 nd channel optical fiber array of the second multi-optical fiber collimator array, is collimated by a collimating lens array arranged corresponding to the 3 rd channel optical fiber array of the first multi-optical fiber collimator array, is refracted into a WDM splitting diaphragm by a 3 rd wedge angle prism of a first wedge angle prism group, is transmitted to the 3 rd wedge angle prism of the second wedge angle prism group to convert the refracted light into horizontal light, passes through an isolator, is correspondingly arranged by the 2 nd channel optical fiber array of the first multi-optical fiber collimator array, is collimated by the 3 rd channel optical fiber array of the first multi-optical fiber collimator array, is input into a 2 nd isolator core of the isolator after being collimated by the collimating lens array arranged corresponding to the 3 rd channel optical fiber array of the first multi-optical fiber collimator array, is refracted into the 2 nd wedge angle prism of the second wedge angle prism group, is refracted into the horizontal light by the 2 nd wedge angle prism of the second wedge angle prism group, is transmitted into the 2 nd wedge angle prism of the second wedge angle prism after being refracted into the optical fiber array, and is transmitted into the 2 nd channel optical fiber array of the first multi-optical fiber collimator array.
8. An EDFA amplifier module with a multi-fiber collimator array according to claim 7, characterized in that: the system is an n-level amplifying module; the separator comprises 2n separation cores; the first wedge angle prism group and the second wedge angle prism group comprise 4n wedge angle prisms; the erbium-doped fiber and the pumping light source are correspondingly arranged in n groups.
9. An EDFA amplifier module with a multi-fiber collimator array according to claim 8, characterized in that: the multi-core monitor comprises n+1 photoelectric detectors and converging lenses, the multi-component light sheet is n+1 component light sheet, the transmittance of the n+1 component light sheet to signal light is 98-99%, the reflectivity is 1-2%, and the light splitting sheet is arranged between an isolation core of the isolator and a corresponding wedge angle prism in the second wedge angle prism group; the signal light emitted by the signal light source passes through a 1 st isolation core of the isolator, then 1-2% of the signal light is reflected by a 1 st light splitting sheet, and is input into a 1 st photoelectric detector through a converging lens to be used as the monitoring of the input signal light; the signal light amplified by the 1 st group of erbium-doped fibers passes through the 2 nd isolation core of the isolator, then the 2 nd light splitting sheet reflects 1-2% of the signal light amplified by the erbium-doped fibers, and the signal light is input into the 2 nd photoelectric detector through the converging lens to be used for monitoring the signal light amplified by the 1 st group of erbium-doped fibers; the signal light amplified by the n-th group of erbium-doped fibers passes through the n+1th isolation core of the isolator, 1-2% of the signal light amplified by the erbium-doped fibers is reflected by the n+1th light splitting sheet, and is input into the n+1th photoelectric detector through the converging lens to be used for monitoring the signal light amplified by the n-th group of erbium-doped fibers.
10. An EDFA amplifier module with a multi-fiber collimator according to claim 3 or 6, characterized in that: the monitors are mounted on the same monitor bracket.
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