CN110176711B - Erbium-doped optical fiber amplifier with S wave band, C wave band and L wave band - Google Patents
Erbium-doped optical fiber amplifier with S wave band, C wave band and L wave band Download PDFInfo
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- 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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- 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
- H01S3/06754—Fibre amplifiers
- H01S3/06762—Fibre amplifiers having a specific amplification band
- H01S3/06766—C-band amplifiers, i.e. amplification in the range of about 1530 nm to 1560 nm
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- 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
- H01S3/06754—Fibre amplifiers
- H01S3/06762—Fibre amplifiers having a specific amplification band
- H01S3/0677—L-band amplifiers, i.e. amplification in the range of about 1560 nm to 1610 nm
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- 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
- H01S3/06754—Fibre amplifiers
- H01S3/06762—Fibre amplifiers having a specific amplification band
- H01S3/06775—S-band amplifiers, i.e. amplification in the range of about 1450 nm to 1530 nm
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- H—ELECTRICITY
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- 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
- H01S3/10007—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers
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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
- H01S3/1603—Solid materials characterised by an active (lasing) ion rare earth
- H01S3/1608—Solid materials characterised by an active (lasing) ion rare earth erbium
Abstract
The invention discloses an erbium-doped fiber amplifier with S wave band, C wave band and L wave band, which comprises an input/output module, a switch control module, an S wave band amplification module, a C wave band amplification module and an L wave band amplification module; the input and output module is respectively connected with the switch control module, the S-band amplification module, the C-band amplification module and the L-band amplification module and is used for inputting and outputting optical signals of the S-band amplification module, the C-band amplification module and the L-band amplification module; the switch control module is respectively connected with the S-band amplification module, the C-band amplification module and the L-band amplification module and is used for controlling the on-off of the optical paths of the S-band amplification module, the C-band amplification module and the L-band amplification module; the S-band amplification module is used for carrying out optical amplification on an S-band; the C-band amplification module is used for carrying out optical amplification on a C-band; and the L-waveband amplification module is used for carrying out optical amplification on the L waveband.
Description
Technical Field
The invention relates to the technical field of optical communication, in particular to an erbium-doped fiber amplifier with S wave band, C wave band and L wave band.
Background
In the early 90 s of the 20 th century, along with the successful development of erbium-doped fiber amplifiers and the gradual maturity of wavelength division multiplexing technology, the capacity and the transmission distance of optical fiber communication are greatly improved. However, in recent years, the data communication amount is multiplied due to the blowout development of the network, and higher requirements are made on the capacity of the optical fiber communication system. The traditional method for expanding the communication capacity of the optical fiber communication system is not only to increase the single channel transmission rate or reduce the channel interval to increase the number of channels, but also to increase the influence of dispersion effect and nonlinear effect on the system. An effective way to increase the transmission capacity is to extend the transmission bandwidth of the system and correspondingly increase the performance requirements of the erbium-doped fiber amplifier, i.e. the erbium-doped fiber amplifier in the system is only suitable for the C-band. Therefore, expanding the erbium-doped fiber amplifier to the S, L band is a necessary choice.
At present, erbium-doped fiber amplifiers in C + L bands are mature and are commercialized gradually, and the loss of optical fibers in S bands is lower than that of the C + L bands, so that the S bands become potential communication resources. The bending loss of the erbium-doped fiber or the change of the refractive index distribution of the fiber can inhibit the ASE of the C waveband, and the S waveband light amplification is realized. In order to fully utilize bandwidth resources of optical fibers and realize multi-window ultra-wideband optical fiber communication, a multi-band combined optical fiber amplifier, i.e., an S + C + L band ultra-wideband optical fiber amplifier, becomes a hot spot of research work. In addition, how to flexibly select the erbium-doped fiber amplifier in the required waveband is also a problem to be considered at present.
For example, patent publication No. CN208093939U discloses a small L-band erbium-doped fiber amplifier, comprising: the optical fiber coupling device comprises an input optical splitter, an input isolator, an input coupler, a first erbium-doped optical fiber, a middle isolator, an output coupler, a pumping optical splitter, a second erbium-doped optical fiber, an output isolator, an output optical splitter, a pumping laser, an input monitor and an output monitor; more preferably, the input splitter, input isolator, and input coupler are integrated into a three-in-one hybrid H1. Preferably, the intermediate isolator and the output coupler are integrated into a two-in-one hybrid device H2. Preferably, the output beam splitter and the output monitor are integrated into a two-in-one hybrid device H3. The L-band erbium-doped fiber amplifier has the advantages that: 1) compact structure, small volume, and can meet the requirement of high integration level of transmission system. 2) And automatic power control is adopted, so that the use is convenient and the management is easy. 3) The power consumption is extremely low, and the integrated circuit board is suitable for highly-integrated transmitting or receiving board cards. Although the L-band erbium-doped fiber amplifier is disclosed, the problem of the multi-band combined fiber amplifier, namely the ultra-wideband fiber amplifier of S + C + L band, still cannot be solved; in addition, how to flexibly select the erbium-doped fiber amplifier in the required waveband is also a problem to be considered at present.
Disclosure of Invention
The invention aims to provide an erbium-doped fiber amplifier with S waveband, C waveband and L waveband aiming at the defects of the prior art, which can realize the optical amplification of the arbitrary combined waveband of the S waveband, the C waveband and the L waveband.
In order to achieve the purpose, the invention adopts the following technical scheme:
an S-band, C-band, L-band erbium-doped fiber amplifier comprising: the device comprises an input/output module, a switch control module, an S-band amplification module, a C-band amplification module and an L-band amplification module;
the input and output module is respectively connected with the switch control module, the S-band amplification module, the C-band amplification module and the L-band amplification module and is used for inputting and outputting optical signals of the S-band amplification module, the C-band amplification module and the L-band amplification module;
the switch control module is respectively connected with the S-band amplification module, the C-band amplification module and the L-band amplification module and is used for controlling the on-off of the optical paths of the S-band amplification module, the C-band amplification module and the L-band amplification module;
the S-band amplification module is used for carrying out optical amplification on an S-band;
the C-band amplification module is used for carrying out optical amplification on a C-band;
and the L-waveband amplification module is used for carrying out optical amplification on the L waveband.
Further, the switch control module includes a first optical switch control module, a second optical switch control module, a third optical switch control module, a fourth optical switch control module, and a fifth optical switch control module.
Further, the input and output module comprises an adjustable light source, a spectrometer, a first optical circulator, an S/CLband wavelength division multiplexer and a C/Lband wavelength division multiplexer; specifically, the adjustable light source is connected with an S-band amplification module through optical fibers through a first optical circulator and a first port of an S/CLband wavelength division multiplexer; the second port of the S/CLband wavelength division multiplexer is connected with the first port of the C/Lband wavelength division multiplexer; the second port of the C/Lband wavelength division multiplexer is connected with the C-band amplification module through an optical fiber; the third port of the C/Lband wavelength division multiplexer is connected with the L-band amplification module through an optical fiber; the first port of the first optical circulator is connected with the spectrometer through an optical fiber and serves as the output of the whole amplifier; a first port of the S/CLband wavelength division multiplexer is connected with a first optical switch control module of the switch control module; a second port of the C/Lband wavelength division multiplexer is connected with a second optical switch control module of the switch control module; and a third port of the C/Lband wavelength division multiplexer is connected with a third optical switch control module of the switch control module.
Furthermore, the S-band amplification module comprises an S-band pump laser, an S-band wavelength division multiplexer, an S-band erbium-doped fiber, a second optical circulator and a first filter; specifically, a first optical switch control module is connected with a first port of an S-band wavelength division multiplexer; the S-band pump laser is connected with a second port of the S-band wavelength division multiplexer; a third port of the S-band wavelength division multiplexer is connected with one end of the S-band erbium-doped fiber; the other end of the S-band erbium-doped fiber is connected with a first port of a second optical circulator; a second port of the second optical circulator is connected with one end of the first filter; the other end of the first filter is connected with a third port of the second optical circulator.
Further, the C-band amplification module comprises a C + L-band pump laser, a 3dB coupler, a C-band wavelength division multiplexer, a C-band erbium-doped fiber, a third optical circulator, and a second filter; specifically, a second optical switch control module is connected with a first port of the C-band wavelength division multiplexer; the C + L wave band pump laser is connected with a first port of the 3dB coupler; the second port of the 3dB coupler is connected with one end of a fourth optical switch control module; the other end of the fourth optical switch control module is connected with a second port of the C-band wavelength division multiplexer; the third port of the C-band wavelength division multiplexer is connected with one end of the C-band erbium-doped fiber; the other end of the C-band erbium-doped fiber is connected with a first port of a third optical circulator; a second port of the third optical circulator is connected with one end of a second filter; the other end of the second filter is connected with a third port of the third optical circulator.
Furthermore, the L-band amplification module comprises a C + L-band pump laser, a 3dB coupler, an L-band wavelength division multiplexer, an L-band erbium-doped fiber, a fourth optical circulator and a third filter; specifically, the third optical switch control module is connected with a first port of the L-band wavelength division multiplexer; the C + L wave band pump laser is connected with a first port of the 3dB coupler; a third port of the 3dB coupler is connected with one end of a fifth optical switch control module; the other end of the fifth optical switch control module is connected with a second port of the L-band wavelength division multiplexer; a third port of the L-band wavelength division multiplexer is connected with one end of the L-band erbium-doped fiber; the other end of the L-band erbium-doped fiber is connected with a first port of a fourth optical circulator; a second port of the fourth optical circulator is connected with one end of a third filter; the other end of the third filter is connected with a third port of the fourth optical circulator.
Furthermore, the S-band pump laser adopts a 980nm power tunable laser; the C + L wave band pump laser adopts a C + L wave band two-in-one pump laser with tunable power of 980 nm.
Furthermore, the S-band erbium-doped fiber, the C-band erbium-doped fiber and the L-band erbium-doped fiber are all low-cladding quartz-doped fibers;
the length of the S-band erbium-doped fiber is 15m, and the gain range is 1480nm to 1530 nm;
the length of the C-band erbium-doped fiber is 10m, and the gain range is 1530nm-1565 nm;
the length of the L-band erbium-doped fiber is 20m, and the gain range is 1565nm-1610 nm.
Furthermore, the switch control module adopts a mechanical optical switch for realizing the control of the on-off of the optical path.
Furthermore, the first filter, the second filter and the third filter are all notch filters, and are used for filtering peak signals of ASE and reducing noise coefficients.
Furthermore, the erbium-doped fiber amplification module with the S waveband, the C waveband and the L waveband is designed into a dual-channel (DPF) structure by utilizing the circulator and the notch filter, and the gain and the bandwidth of the system are well improved by amplifying optical signals twice and filtering ASE peak power by the filter.
Compared with the prior art, the amplifier has the advantages of simple structure, low cost and easy integration of an optical fiber system, can realize optical amplification of any combined wave band of an S wave band, a C wave band and an L wave band, and has obvious improvement on gain and bandwidth compared with a single-channel structure by adopting a double-channel (DPF) structure with a filter.
Drawings
Fig. 1 is a structural diagram of an S-band, C-band, and L-band erbium-doped fiber amplifier according to an embodiment;
fig. 2 is a schematic structural diagram of an S-band, C-band, and L-band erbium-doped fiber amplifier according to an embodiment;
FIG. 3 is a schematic diagram of an input/output module according to an embodiment;
FIG. 4 is a schematic diagram of a connection of an S-band amplification module according to an embodiment;
FIG. 5 is a schematic diagram of a connection of a C-band amplification module according to an embodiment;
FIG. 6 is a schematic diagram of an L-band amplification module according to an embodiment;
FIG. 7 is a spectrum of the gain of the S band provided in the first embodiment;
FIG. 8 is a spectrum of the gain in the C-band provided in the first embodiment;
fig. 9 is a gain spectrum of the L-band provided in the first embodiment.
Wherein, 1, the adjustable light source; 2. a spectrometer; 3-1. a first optical circulator; 3-2. a second optical circulator; 3-3. a third optical circulator; 3-4. a fourth optical circulator; an S/CLband wavelength division multiplexer; 5-1, a first optical switch control module; 5-2, a second optical switch control module; 5-3, a third optical switch control module; 5-4, a fourth optical switch control module; 5-5, a fifth optical switch control module; 6, a C + L wave band pump laser; 7.3dB coupler; an S-band wavelength division multiplexer; a C-band wavelength division multiplexer; an L-band wavelength division multiplexer; an S-band pump laser; an S-band erbium-doped fiber; a C-band erbium-doped fiber; an L-band erbium-doped fiber; 15-1. a first filter; 15-2. a second filter; 15-3. a third filter; a C/Lband wavelength division multiplexer; e.S/a first port of the CLband wavelength division multiplexer; f.S/a second port of the CLband wavelength division multiplexer; t.C/a first port of the LbLland wavelength division multiplexer; g.C/a second port of the Lbnd wavelength division multiplexer; u.C/a third port of the Lbnd wavelength division multiplexer; c. a first port of a first optical circulator; m.S a first port of a band wavelength division multiplexer; k.S a second port of the band wavelength division multiplexer; l.S a third port of the band wavelength division multiplexer; n.C a first port of a band wavelength division multiplexer; p.C a second port of the band wavelength division multiplexer; o.C a third port of the band wavelength division multiplexer; a first port of an h.3db coupler; a second port of the i.3db coupler; a third port of the j.3db coupler; q.L a first port of a band wavelength division multiplexer; s.L a second port of the band wavelength division multiplexer; r.L a third port of the band wavelength division multiplexer.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
The invention aims to provide an erbium-doped fiber amplifier with S waveband, C waveband and L waveband aiming at the defects of the prior art, which can realize the optical amplification of the arbitrary combined waveband of the S waveband, the C waveband and the L waveband.
Example one
The present embodiment provides an S-band, C-band, and L-band erbium-doped fiber amplifier, as shown in fig. 1, including: the device comprises an input/output module, a switch control module, an S-band amplification module, a C-band amplification module and an L-band amplification module.
The input and output module is respectively connected with the switch control module, the S-band amplification module, the C-band amplification module and the L-band amplification module and is used for inputting and outputting optical signals of the S-band amplification module, the C-band amplification module and the L-band amplification module;
the switch control module is respectively connected with the S-band amplification module, the C-band amplification module and the L-band amplification module and is used for controlling the on-off of the optical paths of the S-band amplification module, the C-band amplification module and the L-band amplification module;
the S-band amplification module is used for carrying out optical amplification on an S-band;
the C-band amplification module is used for carrying out optical amplification on a C-band;
and the L-waveband amplification module is used for carrying out optical amplification on the L waveband.
As shown in fig. 2, the input and output module includes a tunable light source 1, a spectrometer 2, a first optical circulator 3-1, an S/CLband wavelength division multiplexer 4, and a C/Lband wavelength division multiplexer 16; the light with different wave bands is coupled into the light amplification modules with different wave bands through an S/CLband wavelength division multiplexer 4 and a C/Lband wavelength division multiplexer 16, and the returned amplified signal light is connected with a spectrometer 2 through a first optical circulator 3-1 for monitoring.
The switch control module comprises a first optical switch control module 5-1, a second optical switch control module 5-2, a third optical switch control module 5-3, a fourth optical switch control module 5-4 and a fifth optical switch control module 5-5; the on-off control module is used for controlling the on-off of the S-band, C-band and L-band amplification modules.
The S-band amplification module comprises an S-band pump laser 11, an S-band wavelength division multiplexer 8, an S-band erbium-doped fiber 12, a second optical circulator 3-2 and a first filter 15-1;
the C-band amplification module comprises a C + L-band pump laser 6, a 3dB coupler 7, a C-band wavelength division multiplexer 9, a C-band erbium-doped fiber 13, a third optical circulator 3-3 and a second filter 15-2;
the L-band amplification module comprises a C + L-band pump laser 6, a 3dB coupler 7, an L-band wavelength division multiplexer 10, an L-band erbium-doped fiber 14, a fourth optical circulator 3-4 and a third filter 15-3;
the erbium-doped fiber amplification module with the S waveband, the C waveband and the L waveband is designed into a dual-channel (DPF) structure by utilizing a circulator and a notch filter, and the gain and the bandwidth of the system are well improved by amplifying optical signals twice and filtering ASE peak power by the filter.
Specifically, as shown in fig. 3, the input/output module is specifically that the tunable light source 1 is connected to the S-band amplification module through an optical fiber via a first optical circulator 3-1 and a first port e of the S/CLband wavelength division multiplexer 4; the second port f of the S/CLband wavelength division multiplexer 4 is connected with the first port t of the C/Lband wavelength division multiplexer 16; a second port g of the C/Lband wavelength division multiplexer 16 is connected with the C-band amplification module through an optical fiber; the third port u of the C/Lband wavelength division multiplexer 16 is connected with the L-band amplification module through an optical fiber; the first port c of the first optical circulator 3-1 is connected with the spectrometer 2 through an optical fiber and is used as the output of the whole amplifier; a first port e of the S/CLband wavelength division multiplexer 4 is connected with a first optical switch control module 5-1 of the switch control module; a second port g of the C/Lband wavelength division multiplexer 16 is connected with a second optical switch control module 5-2 of the switch control module; and a third port u of the C/Lband wavelength division multiplexer 16 is connected with a third optical switch control module 5-3 of the switch control module.
As shown in fig. 4, the S-band amplification module is specifically a first port e of the S/CLband wavelength division multiplexer 4 of the input/output module, and is connected to one end of the first optical switch control module 5-1 of the switch control module; the other end of the first optical switch control module 5-1 is connected with a first port m of the S-band wavelength division multiplexer 8; the S-band pump laser 11 is connected to the second port k of the S-band wavelength division multiplexer 8; a third port l of the S-band wavelength division multiplexer 8 is connected with one end of the S-band erbium-doped fiber 12; the other end of the S-band erbium-doped fiber 12 is connected with a first port of a second optical circulator 3-2; the second port of the second optical circulator 3-2 is connected with one end of a first filter 15-1; the other end of the first filter 15-1 is connected with the third port of the second optical circulator 3-2 through an optical fiber.
As shown in fig. 5, a second port g of the C/Lband wavelength division multiplexer 16 of the C-band amplification module, specifically, the input/output module, is connected to one end of a second optical switch control module 5-2 of the switch control module; the other end of the second optical switch control module 5-2 is connected with a first port n of the C-band wavelength division multiplexer 9; the C + L wave band pump laser 6 is connected with a first port h of the 3dB coupler 7; a second port i of the 3dB coupler 7 is connected with one end of a fourth optical switch control module 5-4; the other end of the fourth optical switch control module 5-4 is connected with a second port p of the C-band wavelength division multiplexer 9; a third port o of the C-band wavelength division multiplexer 9 is connected with one end of the C-band erbium-doped fiber 13; the other end of the C-band erbium-doped fiber 13 is connected with a first port of a third optical circulator 3-3; the second port of the third optical circulator 3-3 is connected with one end of a second filter 15-2; the other end of the second filter 15-2 is connected with a third port of the third optical circulator 3-3 through an optical fiber.
As shown in fig. 6, a third port u of the C/Lband wavelength division multiplexer 16 of the L-band amplification module, specifically, the input/output module, is connected to one end of a third optical switch control module 5-3 of the switch control module; the other end of the third optical switch control module 5-3 is connected with a first port q of the L-band wavelength division multiplexer 10; the C + L wave band pump laser 6 is connected with a first port h of the 3dB coupler 7; a third port j of the 3dB coupler 7 is connected with one end of a fifth optical switch control module 5-5; the other end of the fifth optical switch control module 5-5 is connected with a second port s of the L-band wavelength division multiplexer 10; a third port r of the L-band wavelength division multiplexer 10 is connected with one end of an L-band erbium-doped fiber 14; the other end of the L-band erbium-doped fiber 14 is connected with a first port of a fourth optical circulator 3-4; the second port of the fourth optical circulator 3-4 is connected with one end of a third filter 15-3; the other end of the third filter 15-3 is connected with the third port of the fourth optical circulator 3-4 through an optical fiber.
In this embodiment, the S-band pump laser 11 is a 980nm power tunable laser; the C + L wave band pump laser 6 adopts a C + L wave band two-in-one pump laser with tunable power of 980 nm.
In this embodiment, the S-band erbium-doped fiber 12, the C-band erbium-doped fiber 13, and the L-band erbium-doped fiber 14 all adopt low-clad silica-doped fibers;
the length of the S-band erbium-doped fiber 12 is 15m, and the gain range is 1480nm to 1530 nm;
the length of the C-band erbium-doped fiber 13 is 10m, and the gain range is 1530nm-1565 nm;
the length of the L-band erbium-doped fiber 14 is 20m, and the gain range is 1565nm-1610 nm.
In this embodiment, the switch control module adopts a mechanical optical switch for controlling on/off of the optical path.
In this embodiment, the first filter 15-1, the second filter 15-2, and the third filter 15-3 are all notch filters for filtering peak signals of ASE and reducing noise coefficients.
In this embodiment, the second optical switch control module 5-2 and the fourth optical switch control module 5-4 are on and off consistently, that is, the fourth optical switch control module 5-4 is only connected when the second optical switch control module 5-2 is connected; the third optical switch control module and the fifth optical switch control module are connected and disconnected, that is, the fifth optical switch control module 5-5 is connected only when the third optical switch control module 5-3 is connected.
In this embodiment, the optical amplification of three arbitrary wavelength band combinations can be realized, specifically:
the single light amplification of S wave band, C wave band and L wave band, the broadband light amplification of C + L wave band and the ultra-wideband light amplification of S + C + L wave band. When a first optical switch control module 5-1 in the switch control module is closed, the adjustable light source 1 and the input/output module are communicated with the S-band amplification module to realize an optical amplifier with an S-band dual-channel structure, and amplified signal light returns to a first port c of the first circulator 3-1 to be connected with a spectrometer 2 to serve as the output of the whole amplifier; when a second optical switch control module 5-2 and a fourth optical switch control module 5-4 in the switch control module are closed, the input/output module is communicated with the C-band amplification module to realize an optical amplifier with a C-band dual-channel structure, and amplified signal light returns to a first port C of the first circulator 3-1 to be connected with the spectrometer 2 as the output of the whole amplifier; when a third optical switch control module 5-3 and a fifth optical switch control module 5-5 in the switch control module are closed, the input/output module is communicated with the L-band amplification module to realize an optical amplifier with an L-band dual-channel structure, and amplified signal light returns to a first port c of the first circulator 3-1 to be connected with the spectrometer 2 as the output of the whole amplifier; when the second optical switch control module 5-2, the third optical switch control module 5-3, the fourth optical switch control module 5-4 and the fifth optical switch control module 5-5 in the switch control module are all closed, the C-band amplification module and the L-band amplification module are communicated to realize a broadband C + L-band optical amplifier; a first optical switch control module 5-1, a second optical switch control module 5-2, a third optical switch control module 5-3, a fourth optical switch control module 5-4 and a fifth optical switch control module 5-5 in the switch control modules are all closed, and an ultra wide band S + C + L waveband optical amplifier is realized by communicating an S waveband amplification module, a C waveband amplification module and an L waveband amplification module.
The basic principle of the erbium-doped fiber amplifier of the S-band, C-band and L-band provided by this embodiment is as follows:
the principle of the S-band double-channel (DPF) structure erbium-doped fiber amplifier: an adjustable light source 1 in an input and output module is coupled into an S-band erbium-doped fiber 12 in an S-band amplification module through a first port e of an S/CLband wavelength division multiplexer 4 through a first optical circulator 3-1 for amplification, amplified optical signals pass through a first port and a second port of a second optical circulator 3-2 and are filtered by a first filter 15-1 to filter an S-band ASE peak signal to reduce noise coefficients, the amplified optical signals return to the S-band erbium-doped fiber 12 through a third port of the second optical circulator 3-2 for secondary amplification, and the secondarily amplified signal light passes through the wavelength division multiplexer in the input and output module again and is output to a spectrometer 2 through a first port c of the first optical circulator 3-1, so that a spontaneous emission spectrum of the S-band can be observed in the spectrometer.
The principle of the erbium-doped fiber amplifier with a C-band dual-channel (DPF) structure is as follows: an adjustable light source 1 in an input and output module is coupled into a C-band erbium-doped fiber 13 in a C-band amplification module through a first optical circulator 3-1 and an S/CLband wavelength division multiplexer 4 through a second port g of a C/Lband wavelength division multiplexer 16 for amplification, amplified optical signals pass through a first port of a third optical circulator 3-3 and a second port and are filtered by a second filter 15-2 to reduce a noise coefficient of an ASE peak signal of the C-band, the amplified optical signals return to the C-band erbium-doped fiber 13 through a third port of the third optical circulator 3-3 for secondary amplification, and the secondarily amplified signal light passes through a wavelength division multiplexer in an output module again and is output to a spectrometer 2 through a first port C of the first optical circulator 3-1, so that a spontaneous emission spectrum of the C-band can be observed in the spectrometer.
The principle of the erbium-doped fiber amplifier with an L-band dual-channel (DPF) structure is as follows: an adjustable light source 1 in an input and output module is coupled into an L-band erbium-doped fiber 14 in an L-band amplification module through a first optical circulator 3-1 and an S/CLband wavelength division multiplexer 4 through a third port u of a C/Lband wavelength division multiplexer 16 for amplification, an amplified optical signal passes through a first port and a second port of a fourth optical circulator 3-4, an L-band ASE peak signal is filtered through a third filter 15-3 by the second port to reduce a noise coefficient, the amplified optical signal returns to the L-band erbium-doped fiber 14 through the third port of the fourth optical circulator 3-4 for secondary amplification, the secondarily amplified signal light passes through the wavelength division multiplexer in the input and output module again and is output to a spectrometer 2 through a first port C of the first optical circulator 3-1, and therefore an L-band spontaneous emission spectrum can be observed in the spectrometer.
FIG. 7 shows a gain spectrum of the S band; the gain spectrum of the C band is shown in FIG. 8; fig. 9 shows a gain spectrum of the L-band.
In the embodiment, the optical switch is controlled to obtain optical amplification of any combination wave band of three wave bands of S wave band, C wave band and L wave band, the amplification of each wave band adopts a dual-channel (DPF) structure with a filter, most of spectral power of ASE is reduced by adding a notch filter to filter an ASE peak signal, the noise coefficient is reduced, the gain is further increased, and the optical amplification is superior to a single-channel structure in the aspects of bandwidth and gain. Finally, the amplified signal light power is also affected by parameters such as the pump power and the length of the erbium-doped fiber, so that the pump light power and the length of the erbium-doped fiber need to be reasonably selected to obtain the optimal performance of the erbium-doped fiber amplifier. With the continuous development of various photoelectric devices, erbium-doped fiber amplifiers will obtain higher-gain output, and the application thereof will be wider.
The amplifier of the embodiment has the advantages of simple structure, low cost and easy integration of an optical fiber system, can realize optical amplification of any combination wave band of three wave bands of an S wave band, a C wave band and an L wave band, and has obvious improvement on gain and bandwidth compared with a single-channel structure by adopting a double-channel (DPF) structure with a filter.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (5)
1. An S-band, C-band, L-band erbium-doped fiber amplifier, comprising: the device comprises an input/output module, a switch control module, an S-band amplification module, a C-band amplification module and an L-band amplification module;
the input and output module is respectively connected with the switch control module, the S-band amplification module, the C-band amplification module and the L-band amplification module and is used for inputting and outputting optical signals of the S-band amplification module, the C-band amplification module and the L-band amplification module;
the switch control module is respectively connected with the S-band amplification module, the C-band amplification module and the L-band amplification module and is used for controlling the on-off of the optical paths of the S-band amplification module, the C-band amplification module and the L-band amplification module;
the S-band amplification module is used for carrying out optical amplification on an S-band;
the C-band amplification module is used for carrying out optical amplification on a C-band;
the L-band amplification module is used for carrying out optical amplification on an L-band;
the switch control module comprises a first optical switch control module, a second optical switch control module, a third optical switch control module, a fourth optical switch control module and a fifth optical switch control module;
the input and output module comprises an adjustable light source, a spectrometer, a first optical circulator, an S/CLband wavelength division multiplexer and a C/Lband wavelength division multiplexer; specifically, the adjustable light source is connected with an S-band amplification module through optical fibers through a first optical circulator and a first port of an S/CLband wavelength division multiplexer; the second port of the S/CLband wavelength division multiplexer is connected with the first port of the C/Lband wavelength division multiplexer; the second port of the C/Lband wavelength division multiplexer is connected with the C-band amplification module through an optical fiber; the third port of the C/Lband wavelength division multiplexer is connected with the L-band amplification module through an optical fiber; the first port of the first optical circulator is connected with the spectrometer through an optical fiber and serves as the output of the whole amplifier; a first port of the S/CLband wavelength division multiplexer is connected with a first optical switch control module of the switch control module; a second port of the C/Lband wavelength division multiplexer is connected with a second optical switch control module of the switch control module; a third port of the C/Lband wavelength division multiplexer is connected with a third optical switch control module of the switch control module;
the S-band amplification module comprises an S-band pump laser, an S-band wavelength division multiplexer, an S-band erbium-doped fiber, a second optical circulator and a first filter; specifically, a first optical switch control module is connected with a first port of an S-band wavelength division multiplexer; the S-band pump laser is connected with a second port of the S-band wavelength division multiplexer; a third port of the S-band wavelength division multiplexer is connected with one end of the S-band erbium-doped fiber; the other end of the S-band erbium-doped fiber is connected with a first port of a second optical circulator; a second port of the second optical circulator is connected with one end of the first filter; the other end of the first filter is connected with a third port of the second optical circulator;
the C-band amplification module comprises a C + L-band pump laser, a 3dB coupler, a C-band wavelength division multiplexer, a C-band erbium-doped optical fiber, a third optical circulator and a second filter; specifically, a second optical switch control module is connected with a first port of the C-band wavelength division multiplexer; the C + L wave band pump laser is connected with a first port of the 3dB coupler; the second port of the 3dB coupler is connected with one end of a fourth optical switch control module; the other end of the fourth optical switch control module is connected with a second port of the C-band wavelength division multiplexer; the third port of the C-band wavelength division multiplexer is connected with one end of the C-band erbium-doped fiber; the other end of the C-band erbium-doped fiber is connected with a first port of a third optical circulator; a second port of the third optical circulator is connected with one end of a second filter; the other end of the second filter is connected with a third port of a third optical circulator;
the L-band amplification module comprises a C + L-band pump laser, a 3dB coupler, an L-band wavelength division multiplexer, an L-band erbium-doped optical fiber, a fourth optical circulator and a third filter; specifically, the third optical switch control module is connected with a first port of the L-band wavelength division multiplexer; the C + L wave band pump laser is connected with a first port of the 3dB coupler; a third port of the 3dB coupler is connected with one end of a fifth optical switch control module; the other end of the fifth optical switch control module is connected with a second port of the L-band wavelength division multiplexer; a third port of the L-band wavelength division multiplexer is connected with one end of the L-band erbium-doped fiber; the other end of the L-band erbium-doped fiber is connected with a first port of a fourth optical circulator; a second port of the fourth optical circulator is connected with one end of a third filter; the other end of the third filter is connected with a third port of the fourth optical circulator;
when a first optical switch control module in the switch control module is closed, the adjustable light source and the input-output module are communicated with the S-band amplification module to realize an optical amplifier with an S-band dual-channel structure, and amplified signal light returns to a first port of the first circulator and is connected with a spectrometer to serve as the output of the whole amplifier; when a second optical switch control module and a fourth optical switch control module in the switch control module are closed, the input/output module is communicated with the C-band amplification module to realize an optical amplifier with a C-band dual-channel structure, and amplified signal light returns to the first port of the first circulator and is connected with the spectrometer as the output of the whole amplifier; when a third optical switch control module and a fifth optical switch control module in the switch control module are closed, the input/output module is communicated with the L-band amplification module to realize an optical amplifier with an L-band dual-channel structure, and amplified signal light returns to the first port of the first circulator and is connected with the spectrometer as the output of the whole amplifier; when a second optical switch control module, a third optical switch control module, a fourth optical switch control module and a fifth optical switch control module in the switch control module are all closed, the C-band amplification module and the L-band amplification module are communicated to realize a broadband C + L-band optical amplifier; and a first optical switch control module, a second optical switch control module, a third optical switch control module, a fourth optical switch control module and a fifth optical switch control module in the switch control module are all closed, and the S-band amplification module, the C-band amplification module and the L-band amplification module are communicated to realize an ultra-wideband S + C + L-band optical amplifier.
2. An S-band, C-band, L-band erbium-doped fiber amplifier according to claim 1, wherein said S-band pump laser is a 980nm power tunable laser; the C + L wave band pump laser adopts a C + L wave band two-in-one pump laser with tunable power of 980 nm.
3. The S-band, C-band and L-band erbium-doped fiber amplifier of claim 2, wherein the S-band erbium-doped fiber, the C-band erbium-doped fiber and the L-band erbium-doped fiber are low-clad silica-doped fibers;
the length of the S-band erbium-doped fiber is 15m, and the gain range is 1480nm to 1530 nm;
the length of the C-band erbium-doped fiber is 10m, and the gain range is 1530nm-1565 nm;
the length of the L-band erbium-doped fiber is 20m, and the gain range is 1565nm-1610 nm.
4. An S-band, C-band, and L-band erbium-doped fiber amplifier as claimed in claim 1, wherein said switch control module employs a mechanical optical switch for controlling on/off of the optical path.
5. An S-band, C-band, L-band erbium-doped fiber amplifier as claimed in claim 2 or 3, wherein said first filter, second filter, and third filter are all notch filters for filtering out the peak signal of ASE and reducing the noise figure.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1410824A (en) * | 2002-11-05 | 2003-04-16 | 浙江大学 | Long wave band erbium mixed amplifier with low noise, high gain and high plain |
| CN1815338A (en) * | 2005-02-04 | 2006-08-09 | 华为技术有限公司 | Broadband optical fiber amplifier |
| CN104377535A (en) * | 2014-12-05 | 2015-02-25 | 黑龙江大学 | Single grating high gain flatness L-band erbium doped fiber amplifier |
| CN208093939U (en) * | 2018-01-31 | 2018-11-13 | 无锡市德科立光电子技术有限公司 | Small-sized L-band erbium-doped fiber amplifier |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6621619B2 (en) * | 2001-07-30 | 2003-09-16 | The United States Of America As Represented By The Secretary Of The Navy | Hybrid brillouin/erbium doped fiber amplifier apparatus and method |
-
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- 2019-06-14 CN CN201910514970.6A patent/CN110176711B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1410824A (en) * | 2002-11-05 | 2003-04-16 | 浙江大学 | Long wave band erbium mixed amplifier with low noise, high gain and high plain |
| CN1815338A (en) * | 2005-02-04 | 2006-08-09 | 华为技术有限公司 | Broadband optical fiber amplifier |
| CN104377535A (en) * | 2014-12-05 | 2015-02-25 | 黑龙江大学 | Single grating high gain flatness L-band erbium doped fiber amplifier |
| CN208093939U (en) * | 2018-01-31 | 2018-11-13 | 无锡市德科立光电子技术有限公司 | Small-sized L-band erbium-doped fiber amplifier |
Non-Patent Citations (1)
| Title |
|---|
| 长波段掺铒光纤放大器的设计新方案;谭莉 等;《量子电子学报》;20031031;第20卷(第5期);第520-526页 * |
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