CN1975480A - Double-layer structural wideband light source - Google Patents
Double-layer structural wideband light source Download PDFInfo
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- CN1975480A CN1975480A CNA2005100163090A CN200510016309A CN1975480A CN 1975480 A CN1975480 A CN 1975480A CN A2005100163090 A CNA2005100163090 A CN A2005100163090A CN 200510016309 A CN200510016309 A CN 200510016309A CN 1975480 A CN1975480 A CN 1975480A
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Abstract
A kind of double deck structure broadband illuminant, the pump illuminant output end links the coupler which transports the pump light in two bundles according to the preinstall power ratio by optical fiber, the wavelength division multiplexer links the reflecting mirror by using the optical fiber; the optical fiber links the wavelength division multiplexer which concatenates the isolator, the long-periodic grating , the coupler in proper order; the electric current controlling parts links the pump illuminant; The working electric current controlling parts which links with the pump illuminant was set in the down carrier board, the upper carrier board with CMSO chip which can control the temperature was set above the down carrier board . The device in the down carrier board and the working electric current controlling parts link with the control electric current source and the pumping light source, the photodiode links with the optical feedback output end of the first couplers; The temperature couple back circuit links with the pumping light source which has the critesister; The temperature control chip is set on the upper carrier board.
Description
Technical field
The invention belongs to the optical fiber source technical field, relate in particular to the segmentation pumping and have the superradiance light source of attemperating unit, be specially adapted to fibre optic gyroscope.
Background technology
Because optical fibre gyro has high precision, not damaged, the motion of nothing machinery, distinguishing features such as the life-span is long, obtained using widely and paying attention at space flight, navigation, military affairs and many civil areas, critical component wherein---light source needs to consider wavelength, temporal coherence, spatial coherence, spectral pattern, power and centre wavelength stability in development, factors such as operating temperature range, especially in military field, harsh more to the performance requirement of light source.Known technology is used the SLD light source as optical fibre gyro, and its secondary lobe peak problem is difficult to solve, and output power is low, when its power improves, tends to produce the modulation peak, becomes multimode, makes spectral pattern degenerate.
For addressing these problems, industry has been researched and developed Er-doped fiber superfluorescence radiating light source, so that the stable spectra of broad to be provided, exports higher power, as:
Chinese patent CN97111588.5 discloses a kind of superfluorescent fiber sources, the light of output high degree of polarisation under the situation that does not significantly reduce output power efficient.It is characterized in that comprising: the light with first end and second end is propagated waveguide; Pump light source, it provides the pump signal of first wavelength at described first end of described waveguide, so that excite the light emission of second wavelength that is different from described first wavelength in described waveguide; And polarizer, it is arranged on along on the position of described waveguide, with the light emission of the optimal polarization that enlarges markedly the end output from described first and described second end of described waveguide.According to an embodiment, polarizer is spliced in superfluorescence optical fiber along on the selected position (for example, near the optical fiber mid point) of fiber length.According to another embodiment, the whole length of superfluorescence optical fiber all is polarization, be eliminated basically with a kind of polarization that guarantees light, and the power of the another kind of polarization of light is near the twice of the power that this polarization is had during no polarizer in the superfluorescence optical fiber.
200410041815.0 1 kinds of high powers of Chinese patent, the long-wave band Er-doped fiber super-fluorescence light source of high flat degree, comprise the second Er-doped fiber EDF2, the first Er-doped fiber EDF1, the 3rd Er-doped fiber EDF3, pump light, wavelength division multiplexer, the pump power coupling mechanism constitutes, the light output end of optical fiber is provided with optoisolator, it is characterized in that input end from optical fiber to output terminal respectively by the second Er-doped fiber EDF2, the first Er-doped fiber EDF1, the 3rd Er-doped fiber EDF3 series connection, the second Er-doped fiber EDF2 has the input end of bevel wedge shape, other is provided with the pump power coupling mechanism and connects pump light output, and be divided into two bundles, a branch of pumping light power P1 connects wavelength division multiplexer and is used for the pumping first Er-doped fiber EDF1, the second Er-doped fiber EDF2 then is connected the input end of EDF1 by wavelength division multiplexer, total output forward light that their produce is as seed light, and unites the common pumping EDF3 of another bundle pump light P3.
Chinese patent application N200320112294.4 discloses the super double-layer structural wideband light source of a kind of optical fiber, and it comprises optical fiber, semiconductor laser, optoisolator, Er-doped fiber, and wherein, it also comprises reverberator, Wavelength division multiplexing optical coupler; Wherein first semiconductor laser is by first wave division multiplex coupler forward direction pump erbium-doped optical fiber, and second semiconductor laser is by second wave division multiplex coupler backward pump erbium-doped optical fiber; The other end of first wavelength division multiplexer links to each other with fibre reflector, and therefore the amplified spontaneous emission luminous energy of propagating to the left side is reflected by fibre reflector, reenters Er-doped fiber, as the secondary pumping source of Er-doped fiber; The other end of second wavelength division multiplexer links to each other with isolator, constitutes the double-layer structural wideband light source output terminal.
The problem that known technology exists: the one, the operating temperature range that light source is suitable for is narrower, and the working temperature of pump light source can not be well controlled, and the limitation of light source directly affects the applicability of fibre optic gyroscope; The 2nd, the known double-layer structural wideband light source volume that is used for fibre optic gyroscope is bigger, has influenced the suitable application area of fibre optic gyroscope equally.
Summary of the invention
Problem to be solved by this invention is to overcome the above-mentioned defective that aforementioned techniques exists, and a kind of two-stage structure segmentation pumping, and the wideband light source that can control the working temperature of pump light source are provided.
The object of the invention provides a kind of double-layer structural wideband light source of may command pump light source working temperature;
Still a further object of the present invention provides a kind of double-layer structural wideband light source of two-stage structure segmentation pumping.
The present invention solves its technical matters and takes following technical scheme to realize, according to a kind of double-layer structural wideband light source provided by the invention, comprises pump light source, wherein,
Described pump light source has thermal sensing element, and its output terminal is connected with second coupling mechanism of restrainting the conveying pump lights by default power score two by optical fiber, and a port of this second coupling mechanism is connected with a port of first wavelength division multiplexer, carries a branch of pump light; The another port of second coupling mechanism is connected with a port of second wavelength division multiplexer, carries another bundle pump light;
Be connected in series second isolator by first optical fiber between this first wavelength division multiplexer and second wavelength division multiplexer; The another port of second wavelength division multiplexer connects catoptron by second optical fiber;
First optical fiber is subjected to from the exciting of the pumping laser of first wavelength division multiplexer output, and first optical fiber is subjected to from second isolator output that is connected on the other end simultaneously, and spontaneous and stimulated radiation spectrum excites by second optical fiber.
Second optical fiber receives exciting from the pumping laser of second wavelength division multiplexer; Second optical fiber receives exciting of light that mirror reflects returns simultaneously, and sends second wavelength division multiplexer back to, sends to first optical fiber via second isolator;
The output port of first wavelength division multiplexer is connected in series first isolator, long-period gratings, first coupling mechanism successively; One current control division is connected with pump light source, described current control division is by controlled current source, Power arithmetic treatment circuit and the photodiode of serial connection constitute successively, controlled current source is connected with pump light source, and photodiode is connected with the light feedback output end of first coupling mechanism; Photodiode receives the optical feedback signal from first coupling mechanism, to the voltage signal of Power arithmetic treatment circuit output one as the original signal of working current control part;
One temperature control part is made of the temperature control chip of the Temperature Feedback treatment circuit that is connected in series successively, temperature arithmetic processing circuit, may command preset working temperature range; The Temperature Feedback treatment circuit is connected with the pump light source with thermal sensing element, and the primary light signal that receives is become voltage signal, is transported to the temperature arithmetic processing circuit, and the information after will handling sends to the temperature control chip that is connected with pump light source.
The present invention solves its technical matters and can also take following technical scheme further to realize:
Aforementioned double-layer structural wideband light source, wherein, the temperature control chip has the temperature control circuit that adds that meets default heat value output heating current and presets the refrigeration control circuit that refrigeration value is exported the refrigeration electric current with meeting.
Aforesaid double-layer structural wideband light source wherein, is connected in series holding circuit between described controlled current source and the Power arithmetic treatment circuit.
Aforesaid double-layer structural wideband light source, wherein, described second isolator that between second wavelength division multiplexer and first optical fiber, connects; Described long-period gratings one end is connected with first isolator.
Aforesaid double-layer structural wideband light source, wherein, described; Aforesaid pump light source is the LASER Light Source of 980nm laser.
Aforesaid double-layer structural wideband light source, wherein, described first coupling mechanism has light outlet terminal and light feedback output end; Described pump light source has thermistor.
Aforesaid double-layer structural wideband light source, wherein, described catoptron is the terminal metal coated optical fibre or is connected into tore of reflection by three-dB coupler; Aforesaid optical fiber is rare earth doped optical fiber; Described long-period gratings is the grating of encapsulation.
Aforesaid double-layer structural wideband light source, wherein, described rare earth doped optical fiber is Er-doped fiber especially; 980nm semiconductor laser light resource particularly.
Aforesaid double-layer structural wideband light source, wherein, one bottom carrier board is set to make optical fiber to keep the circle or the oval inscribe polygon of streamlined coiling, its first limit portion is provided with the notch of ccontaining pump light source, and polygonal each limit portion of this inscribe and light shell outer cover exactly form the chamber of optical fibre element; One upper strata carrier board by leg unit with lead on the bottom carrier board; The working current control part that device is connected with pump light source on the described bottom carrier board, described working current control part is by controlled current source, holding circuit, Power arithmetic treatment circuit and the photodiode of serial connection constitute successively, controlled current source is connected with pump light source, and photodiode is connected with the light feedback output end of first coupling mechanism;
Described temperature control part is by Temperature Feedback treatment circuit, temperature arithmetic processing circuit, the temperature control chip of serial connection constitute successively; The Temperature Feedback treatment circuit is connected with the pump light source with thermistor; Temperature control chip device is sent to the temperature control chip that is connected with pump light source by the information after the temperature arithmetic processing circuit calculation process on the carrier board of upper strata.
Aforesaid double-layer structural wideband light source, wherein, a described bottom carrier board is set to circle inscribe hexagon, with the adjacent second limit portion, the 4th limit portion of being provided with of the first limit portion two-end-point; Be oppositely arranged the 3rd limit portion with the first limit portion, form the district portion of ccontaining optical element respectively, the bottom carrier board is provided with locating notch.
The present invention compared with prior art has significant advantage and beneficial effect.
By above technical scheme as can be known, the present invention has following advantage at least under the structural arrangements of excellence: the present invention compared with prior art has significant technical progress, can be rated as have novelty, the good technology of creativeness, practicality.
Pump light source is sent laser and is entered light path part by coupling mechanism, and the exciting radiation through to two sections doped fibers produces broadband spectral, and this case configuration long-period gratings has improved the flatness of output spectrum in the suitably decay of wavelength location.The configuration of first coupling mechanism makes the spectrum part of output partly use for control circuit as feedback; Controlled current source in the control circuit and temperature control chip can be controlled the working current and the working temperature of pump light source respectively, guarantee that light source can both normal reliable work in-40 to+70 degrees centigrade of scopes, and export highly stable; This case is the configuration protection circuit between operational amplifier and controlled current source, has further guaranteed the reliability service of pump light source.
This case is provided with double-deck double-layer structural wideband light source, and configuration upper strata carrier board can make full use of the space, increases and puts the useful area of electronic devices and components and wiring, and guarantee that the light source volume is very little; Particularly the temperature control chip can be reduced the interference of temperature control chip to the pumping source control circuit as for the upper strata carrier board; The setting of this case double-layer structural also is convenient to adjust flexibly according to customer requirement the length or the pump power of two-stage erbium optical fiber, with the stability of effective raising centre wavelength.
The specific embodiment of the present invention is provided in detail by following examples and accompanying drawing thereof.
Description of drawings
Fig. 1 is an one-piece construction synoptic diagram of the present invention;
Fig. 1 a is a bottom plate structure synoptic diagram of the present invention;
Fig. 1 b is a top plate structural representation of the present invention;
Fig. 2 is light path of the present invention and circuit overall schematic;
Fig. 3 is the spectrum figure of exporting when not adding long-period gratings;
Fig. 4 is an output spectrum figure when adding behind the long-period gratings-40 degrees centigrade;
Fig. 5 is after adding long-period gratings+output spectrum figure 70 degrees centigrade the time;
Fig. 6 is the transmitted spectrum figure of long-period gratings.
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment, to according to embodiment provided by the invention, structure, feature and effect thereof, describe in detail as after.
Shown in Fig. 1-6, a kind of double-layer structural wideband light source, comprise pump light source 1, wherein, described pump light source 1 output terminal is connected with second coupling mechanism 20 of restrainting the conveying pump lights by default power score two by optical fiber, one port of this second coupling mechanism is connected with a port of first wavelength division multiplexer 24, carries a branch of pump light; The another port of second coupling mechanism is connected with a port of second wavelength division multiplexer 27, carries another bundle pump light; Described pump light source has thermistor;
Be connected in series second isolator 26 by first optical fiber 25 between this first wavelength division multiplexer and second wavelength division multiplexer; The another port of second wavelength division multiplexer connects catoptron 29 by second optical fiber 28, is used for the right lateral light reflected back optical fiber with optical fiber, to improve power-conversion efficiencies; Described catoptron is the terminal metal coated optical fibre or adopts three-dB coupler to be connected into tore of reflection and realize.
First optical fiber 25 is subjected to from the exciting of the pumping laser of first wavelength division multiplexer 24 output, and the number of ions upset produces spontaneous radiation in the optical fiber; Simultaneously first optical fiber 25 is subjected to from second isolator, 26 outputs that are connected on the other end, and spontaneous and stimulated radiation spectrum excites by second optical fiber 28.
Second optical fiber 28 receives exciting from the pumping laser of second wavelength division multiplexer 27; Second optical fiber 28 receives exciting of light that mirror reflects returns simultaneously, and sends second wavelength division multiplexer 27 back to, sends to first optical fiber 25 via second isolator 26;
Described second coupling mechanism is different according to two sections doped fiber doping contents and length, and default power ratio is divided two bundle outputs, two sections Er-doped fibers of de-energisation 25,28 respectively with pump light, so that the output spectral pattern is smooth as far as possible.
Aforesaid optical fiber is rare earth doped optical fiber, so that the ion Stimulated Light excites the upset of generation number of ions in the fiber core, this optical fiber accumulates the fluorescence that produces the bandwidth with broad on both direction; Especially Er-doped fiber is even more ideal for described rare earth doped optical fiber, and rare earth doped optical fiber is gain of light medium, and Er-doped fiber requires lower to pump power, and the wavelength of output is more stable, more excellent, is more suitable for being applied to fibre optic gyroscope; Described doped fiber bind mode effectively raises the transformation efficiency and the output center wavelength stability of pumping.
Aforesaid pump light source 1 is for producing the LASER Light Source, particularly 980nm semiconductor laser light resource of 980nm laser, and is more suitable;
By aforementioned light path structure, the smooth spectrum in first coupling mechanism, 21 exportable broadbands;
To sum up light path is constructed, second coupling mechanism 20 is connected between pump light source and first wavelength division multiplexer 24, second wavelength division multiplexer 27, to press the power separated into two parts from the pump light of pumping light source, export to this two wavelength division multiplexers respectively from this first coupling mechanism two-port;
Second Er-doped fiber, 28 1 ends are connected with a port 273 of second wavelength division multiplexer 27, accept the pumping of pumping laser, make its number of ions upset, produce spontaneous emission light, this spontaneous emission light is sent second wavelength division multiplexer back to by the port 273 of second wavelength division multiplexer 27, outputs to isolator 26 via the another port of second wavelength division multiplexer and transmits left;
Described second Er-doped fiber, 28 other ends connect catoptron, the aforementioned spontaneous radiation spectrum that Er-doped fiber 28 produces reenters Er-doped fiber 28 by mirror reflects, produce stimulated radiation, this part spectrum also is transported to second wavelength division multiplexer from the port 273 of second wavelength division multiplexer 27, outputs to isolator 26 via the another port of second wavelength division multiplexer and transmits left;
First Er-doped fiber, 25 1 ends are connected with a port 243 of first wavelength division multiplexer 24, accept the pumping of pumping laser, make its number of ions upset, produce spontaneous emission light;
First Er-doped fiber, 25 other ends are connected with the output terminal of second isolator 26, accept from the spontaneous of second optical fiber 28 and stimulated radiation spectrum exciting to first optical fiber 25, all spectrum enter first wavelength division multiplexer 24 from first Er-doped fiber 25, and, send to first isolator 23 from output terminal 241 output of first wavelength division multiplexer;
Between second wavelength division multiplexer 27 and first optical fiber 25, connect second isolator 26, prevent that the spectrum in first optical fiber from importing into from second optical fiber 28 by second wavelength division multiplexer 27, avoid causing exciting vibration, improve stability.
One long-period gratings, 22 1 ends are connected with first isolator 23, the spectrum in this isolator output spectrum particular range of wavelengths are decayed, to obtain more smooth output spectral pattern;
The other end of this long-period gratings 22 is connected with the input end of first coupling mechanism 21;
First coupling mechanism 21 has light outlet terminal 211 and light feedback output end 212, and it will be exported light and press the power separated into two parts, and a part is as output, a part is as feedback signal, increase control accuracy, improved the precision of output, the light feedback output end provides original control signal to circuit structure 3.
Described circuit structure 3 is used to control the working current and the working temperature of pump light source, can both normal reliable work in-40 to+70 degrees centigrade of scopes to guarantee light source, and export highly stable.
Circuit structure 3 is made of working current control part 31 that is connected with pump light source and working temperature control part 32;
Described working current control part 31 is by controlled current source 314, holding circuit 313, Power arithmetic treatment circuit 312 and the photodiode 311 of serial connection constitute successively, controlled current source 314 is connected with pump light source 1, and photodiode 311 is connected with the light feedback output end of first coupling mechanism 21;
The optical feedback signal that photodiode 311 receives from first coupling mechanism 21; to Power arithmetic treatment circuit 312 outputs one voltage signal; this voltage signal is as the original signal of working current control part; remove to control controlled current source by the Power arithmetic processing; holding circuit guarantees that the controlled current source output current value does not exceed the normal range of operation of pump light source, guarantees the reliability service of pump light source.
Temperature control part 32 is by Temperature Feedback treatment circuit 323, temperature arithmetic processing circuit 322, the temperature control chip 321 of serial connection constitute successively; Temperature Feedback treatment circuit 323 is connected with the pump light source 1 with thermistor, the primary light signal that receives is become voltage signal, be transported to temperature arithmetic processing circuit 322 and carry out calculation process, and the information after will handling sends to the temperature control chip that is connected with pump light source; Described temperature control chip 321 adopts two-way temperature control chip, and two-way temperature control chip is meant to have and meets adding temperature control circuit and meeting the refrigeration control circuit of presetting refrigeration value output refrigeration electric current of default heat value output heating current; Make the pumping source working temperature constant, make light source can be in-40 to+70 degrees centigrade of ambient temperature ranges operate as normal and output stable.
When the pump light source working temperature is lower than design temperature, heating current is from 3211 pairs of pump light source heating of temperature control chip one output port, when the pump light source working temperature was higher than design temperature, the refrigeration electric current freezed to pump light source from another port 3212 outputs of temperature control chip.
To sum up circuit structure 3, the first coupling mechanisms 21 are told sub-fraction as feedback with the light signal of terminal output, offer power control and control original signal the most, have improved the output power control accuracy greatly.
Light signal fed back converts the voltage signal that the circuit control part can directly use to by the photodiode 31 of circuit control part 3.
Temperature control part 32 is adjusted control according to the feedback voltage signal that output power setting value and photodiode 31 provide in real time to output.Its control is to realize that by the output current of adjusting controlled current source 34 holding circuit between controlled current source and the Power arithmetic processing section shields, and guarantees that the controlled current source output current can not exceed pumping source running current scope.The temperature control chip is according to the control signal work of temperature calculation process part, the working temperature of control pumping source, guarantee that the pumping source working temperature in normal range, guarantees the mission life of pumping source, help improving the stability of pumping source output power on the other hand.Two-way control circuit well known to those skilled in the art is adopted in temperature control.
A kind of two-stage structure double-layer structural wideband light source has the carrier board that carries aforementioned light path and circuit electronic component, wherein,
The one bottom carrier board 4 that combines with the housing coupling of optical fiber source, general inscribe hexagon for circle, so that optical fiber becomes the camber line coiling along the carrier board outer rim, so that the transfer efficiency of optical fiber is higher, two summits on the bottom carrier board transverse axis are provided for carrier board is fixed in locating notch 41,42 in the light shell outer cover; This bottom carrier board first limit portion 40 is provided with the notch 44 of ccontaining pump light source 1, with the adjacent second limit portion 45, the 4th limit portion 46 of being provided with of 40 two-end-points of the first limit portion; Be oppositely arranged the 3rd limit portion 43 with the first limit portion 40, each limit portion and light shell outer cover exactly form the chamber of optical fibre element; Pump light source corresponds respectively to side cut portion in described each circle via coupling mechanism 20, wavelength division multiplexer 24, the isolator 21 of optical fiber serial connection, so that the comfortable huge rock of each optical element crouches in light source shell, optical fiber keeps the streamlined coiling;
One upper strata carrier board 5 on bottom carrier board 4, forms the double-layer circuit board structure by pillar 6 devices with lead;
The working current control part 31 that device is connected with pump light source on the described bottom carrier board 4, wherein, described working current control part 31 is by controlled current source 314, holding circuit 313, Power arithmetic treatment circuit 312 and the photodiode 311 of serial connection constitute successively, controlled current source 314 is connected with pump light source 1, and photodiode 311 is connected with the light feedback output end of first coupling mechanism 21;
Described temperature control part 32 is by Temperature Feedback treatment circuit 323, temperature arithmetic processing circuit 322, the temperature control chip 321 of serial connection constitute successively; Temperature Feedback treatment circuit 323 is connected with the pump light source 1 with thermistor; Temperature control chip 321 devices are sent to the temperature control chip 321 that is connected with pump light source by the information after temperature arithmetic processing circuit 322 calculation process on the carrier board of upper strata.
Configuration upper strata carrier board can make full use of the space, increases and puts the useful area of electronic devices and components and wiring, and guarantee that the light source volume is very little; The temperature control chip can be reduced the interference of temperature control chip to the pumping source control circuit as for the upper strata carrier board; Realize the purpose of two-stage structure segmentation pumping, this case double-layer structural is convenient to adjust flexibly as requested the length or the pump power of two-stage erbium optical fiber, can effectively improve the stability of centre wavelength.
Fibre optic gyroscope is flatnesses to another performance index that double-layer structural wideband light source requires, because the emission spectrum of Er-doped fiber is also uneven, so it also is uneven causing the output spectral pattern of Er-doped fiber super-fluorescence light source, at output termination passive filter, make the spectral pattern of the transmission spectrum of wave filter and Er-doped fiber opposite, can make output smooth like this, perhaps allow wave filter spectrum be had attenuation at 1530 places, the part that power is too high is scabbled, but this makes that also output power has been subjected to loss, has introduced the temperature effect of wave filter simultaneously.We adopt long-period gratings that planarization is carried out in output, take measures to have obtained effect preferably on the writing and encapsulate of grating.
The above only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, every foundation technical spirit of the present invention all still belongs in the scope of technical solution of the present invention any simple modification, equivalent variations and modification that above embodiment did.
Claims (10)
1, a kind of double-layer structural wideband light source comprises pump light source, it is characterized in that,
Described pump light source (1) has thermal sensing element, its output terminal is connected with second coupling mechanism (20) of restrainting the conveying pump lights by default power score two by optical fiber, one port of this second coupling mechanism is connected with a port of first wavelength division multiplexer (24), carries a branch of pump light; The another port of second coupling mechanism is connected with a port of second wavelength division multiplexer (27), carries another bundle pump light;
Be connected in series second isolator (26) by first optical fiber (25) between this first wavelength division multiplexer and second wavelength division multiplexer; The another port of second wavelength division multiplexer connects catoptron (29) by second optical fiber (28);
First optical fiber (25) is subjected to from the exciting of the pumping laser of first wavelength division multiplexer (24) output, and first optical fiber is subjected to from second isolator (26) output that is connected on the other end simultaneously, and spontaneous and stimulated radiation spectrum excites by second optical fiber (28).
Second optical fiber (28) receives the pumping laser from second wavelength division multiplexer (27); Second optical fiber (28) receives exciting of light that mirror reflects returns simultaneously, and sends second wavelength division multiplexer (27) back to, sends to first optical fiber (25) via second isolator (26);
The output port of first wavelength division multiplexer (24) is connected in series first isolator (23), long-period gratings (22), first coupling mechanism (21) successively;
One current control division (31) is connected with pump light source (1), described current control division is by controlled current source (314), Power arithmetic treatment circuit (312) and the photodiode (311) of serial connection constitute successively, controlled current source (314) is connected with pump light source, and photodiode (311) is connected with the light feedback output end of first coupling mechanism (21); Photodiode (311) receives the optical feedback signal from first coupling mechanism (21), to the voltage signal of Power arithmetic treatment circuit (312) output one as the original signal of working current control part;
One temperature control part (32) is made of the temperature control chip (321) of the Temperature Feedback treatment circuit (323) that is connected in series successively, temperature arithmetic processing circuit (322), may command preset working temperature range; Temperature Feedback treatment circuit (323) is connected with the pump light source with thermal sensing element, the primary light signal that receives is become voltage signal, be transported to temperature arithmetic processing circuit (322), and the information after will handling sends to the temperature control chip that is connected with pump light source.
2, double-layer structural wideband light source as claimed in claim 1, it is characterized in that described temperature control chip (321) has the temperature control circuit that adds that meets default heat value output heating current and presets the refrigeration control circuit that refrigeration value is exported the refrigeration electric current with meeting.
3, double-layer structural wideband light source as claimed in claim 1 or 2 is characterized in that, is connected in series holding circuit (313) between described controlled current source (314) and the Power arithmetic treatment circuit (312).
4, double-layer structural wideband light source as claimed in claim 3 is characterized in that, described second isolator (26) that connects between second wavelength division multiplexer (27) and first optical fiber (25); Described long-period gratings (22) one ends are connected with first isolator (23).
5, double-layer structural wideband light source as claimed in claim 4 is characterized in that, aforesaid pump light source is the LASER Light Source of 980nm laser.
6, double-layer structural wideband light source as claimed in claim 5 is characterized in that, described first coupling mechanism (21) has light outlet terminal (211) and light feedback output end (212); Described pump light source has thermistor.
7, double-layer structural wideband light source as claimed in claim 6 is characterized in that, described catoptron is the terminal metal coated optical fibre or is connected into tore of reflection by three-dB coupler; Aforesaid optical fiber is rare earth doped optical fiber; Described long-period gratings is the grating of encapsulation.
8, double-layer structural wideband light source as claimed in claim 7 is characterized in that, described rare earth doped optical fiber is Er-doped fiber especially; 980nm semiconductor laser light resource particularly.
9, double-layer structural wideband light source as claimed in claim 8, it is characterized in that, one bottom carrier board (4) is set to make optical fiber to keep the circle or the oval inscribe polygon of streamlined coiling, its first limit portion (40) is provided with the notch (44) of ccontaining pump light source (1), and polygonal each limit portion of this inscribe and light shell outer cover exactly form the chamber of optical fibre element;
One upper strata carrier board (5) installs on the bottom carrier board by the pillar with lead (6);
Described bottom carrier board (4) is gone up the working current control part (31) that device is connected with pump light source, described working current control part is by controlled current source (314), holding circuit (313), Power arithmetic treatment circuit (312) and the photodiode (311) of serial connection constitute successively, controlled current source (314) is connected with pump light source, and photodiode (311) is connected with the light feedback output end of first coupling mechanism (21); Described temperature control part (32) is by Temperature Feedback treatment circuit (323), temperature arithmetic processing circuit (322), the temperature control chip (321) of serial connection constitute successively; The Temperature Feedback treatment circuit is connected with the pump light source with thermistor; Temperature control chip device is sent to the temperature control chip that is connected with pump light source by the information after the temperature arithmetic processing circuit calculation process on the carrier board of upper strata.
10, double-layer structural wideband light source as claimed in claim 9 is characterized in that, a described bottom carrier board is set to circle inscribe hexagon, with the adjacent second limit portion (45), the 4th limit portion (46) of being provided with of first limit portion (40) two-end-point; Be oppositely arranged the 3rd limit portion (43) with the first limit portion (40), form the district portion of ccontaining optical element respectively, the bottom carrier board is provided with locating notch (41,42).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101404376B (en) * | 2008-10-27 | 2010-04-14 | 无锡市中兴光电子技术有限公司 | Automatic temperature control apparatus of pump laser for ASE broadband light source |
| CN102386553A (en) * | 2011-10-12 | 2012-03-21 | 北京航空航天大学 | Anti-radiation wide spectrum fiber light source |
| CN108964755A (en) * | 2017-05-17 | 2018-12-07 | 富士通株式会社 | Optical signal-to-noise ratio monitoring device, sender unit and method, photoreceiver |
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2005
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101404376B (en) * | 2008-10-27 | 2010-04-14 | 无锡市中兴光电子技术有限公司 | Automatic temperature control apparatus of pump laser for ASE broadband light source |
| CN102386553A (en) * | 2011-10-12 | 2012-03-21 | 北京航空航天大学 | Anti-radiation wide spectrum fiber light source |
| CN108964755A (en) * | 2017-05-17 | 2018-12-07 | 富士通株式会社 | Optical signal-to-noise ratio monitoring device, sender unit and method, photoreceiver |
| CN108964755B (en) * | 2017-05-17 | 2021-05-07 | 富士通株式会社 | Optical signal-to-noise ratio monitoring device, signal sending device and method and optical receiver |
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