CN101714739A - Y type cavity all-optical fiber hopping frequency millimeter wave generating device - Google Patents
Y type cavity all-optical fiber hopping frequency millimeter wave generating device Download PDFInfo
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- CN101714739A CN101714739A CN200910238435A CN200910238435A CN101714739A CN 101714739 A CN101714739 A CN 101714739A CN 200910238435 A CN200910238435 A CN 200910238435A CN 200910238435 A CN200910238435 A CN 200910238435A CN 101714739 A CN101714739 A CN 101714739A
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Abstract
The invention discloses a Y type cavity all-optical fiber hopping frequency millimeter wave generating device and relates to the technical field of optical fiber communication and millimeter wave optical generation. Both ends of a broadband grating (2) are respectively connected with a pump source (1) and an active optical fiber (3); the other port of the active optical fiber (3) is connected with the input end of a 1*2 coupler (4); both output ports of the 1*2 coupler (4) are respectively connected with the optical input ports of a narrow-band optical fiber grating (6) and a 1*N photoswitch (5); N passage ports of the 1*N photoswitch (5) are respectively connected with the first or second to the N narrow-band optical fiber grating (71)(72) to (7N); the output ends of the narrow-band optical fiber grating (6) and the first to N narrow-band optical fiber gratings are coupled into a path by a (N+1)*1coupler (8); and the output port of the (N+1)*1coupler (8) is connected with a photoelectric detector (9). The laser emitted by two linear resonant cavities forming a Y-shaped cavity generates difference frequency at the photoelectric detector by selecting the stat of the photoswitch, and the hopping frequency millimeter wave is generated.
Description
Technical field
The present invention relates to optical fiber communication, millimeter wave optics generation technique field, is a kind of Y die cavity all-optical fiber hopping frequency millimeter wave generating device specifically.
Background technology
Millimeter wave generation problem is a core technology in the microwave photon science, it also is the underlying issue of broadband wireless ROF technology, generation problem around millimeter wave, all carry out a large amount of research and trial, but because the working frequency range of millimeter wave very high (30～300GHz) own, thereby equipment had higher requirement, directly caused construction cost too high, the present millimeter wave generating method that proposes, as direct modulation direct Detection Method, the harmonic wave production method, optical heterodyne method etc., because these methods all depend on accurate expensive tuned laser and optical modulator, and, can't carry out variable ratio frequency changer and frequency hopping adjustment for generating the millimeter-wave frequency relative fixed.The research of the application of fiber grating and particularly dual wavelength and even multi-wavelength optical fiber grating laser provides possibility for low cost generates the millimeter wave problem, and fiber laser is a kind of very promising light source in the optical fiber telecommunications system.Multiple-wavelength laser and millimeter wave generation scheme based on fiber grating constantly are suggested, as the device (number of patent application 200710177000.9) of single polarization dual-wavelength fiber grating laser to generate microwave, millimeter wave, utilize the device (number of patent application 200710176999.5) of line style chamber dual wavelength fibre laser to generate microwave, millimeter wave, their common problems that exists are to carry out the frequency hopping adjustment to millimeter wave.
Summary of the invention
The present invention is a kind of Y die cavity all-optical fiber hopping frequency millimeter wave generating device, and the original intention of invention is to utilize cheap fiber grating, and Active Optical Fiber and a spot of passive optical communications equipment are realized the generation of millimeter-wave signal, and frequency adjustable is whole.Its basic principle is two public one section Active Optical Fibers of optical resonator, utilize light to open the light to select different narrow band fiber gratings to control these two resonant cavitys and have different resonance frequencys, penetrate two different wavelength of laser thereby swash, utilize photodetector, realize that beat generates millimeter wave, adopt optical switch to select different narrow band fiber gratings in the scheme, the realization millimeter-wave frequency can be adjusted.Whole system is only by a broadband grating, a plurality of arrowbands grating, and pumping source, optical switch and coupler are formed, and have extremely low construction cost, and the millimeter-wave frequency tunable characteristic also have very high using value.
Technical scheme of the present invention:
Y die cavity all-optical fiber hopping frequency millimeter wave generating device, this device comprises: pumping source, band optical fiber grating, Active Optical Fiber, 1 * 2 coupler, narrow band fiber grating, 1 * N optical switch, narrow band fiber grating, the first narrow band fiber grating, the second narrow band fiber grating ..., N narrow band fiber grating, (N+1) * 1 coupler, photodetector; Concrete connected mode is:
Band optical fiber grating two ends connect pumping source and Active Optical Fiber one end respectively, another termination 1 * 2 coupler input of Active Optical Fiber, output port of 1 * 2 coupler connects an end of narrow band fiber grating, and another output port of 1 * 2 coupler connects the light input end mouth of 1 * N optical switch; Another termination (N+1) * 1 coupler input of narrow band fiber grating;
The first passage port of one termination, 1 * N optical switch of the first narrow band fiber grating, another termination (N+1) * 1 coupler input of the first narrow band fiber grating;
The second channel port of one termination, 1 * N optical switch of the second narrow band fiber grating, another termination (N+1) * 1 coupler input of the second narrow band fiber grating;
......
The N access port of one termination, 1 * N optical switch of N narrow band fiber grating, another termination (N+1) * 1 coupler input of N narrow band fiber grating;
(N+1) * 1 the coupler output port connects photodetector.
Beneficial effect of the present invention is specific as follows:
The present invention does not relate to complexity and expensive equipment, only adopt fiber grating, Active Optical Fiber, pumping source and a small amount of passive optical communications equipment make full use of linear light fibre laser principle, apply it to the microwave photon field, in order to produce millimeter-wave signal, biggest advantage of the present invention is that system configuration is simple, and is with low cost, and has the frequency hopping characteristic of millimeter wave.
Description of drawings
Fig. 1 Y die cavity all-optical fiber hopping frequency millimeter wave generating device schematic diagram (N=2).
Fig. 2 Y die cavity all-optical fiber hopping frequency millimeter wave generating device adopts optical grating reflection spectrum schematic diagram (N=2).
Fig. 3 Y die cavity all-optical fiber hopping frequency millimeter wave generating device schematic diagram (N=4).
Fig. 4 Y die cavity all-optical fiber hopping frequency millimeter wave generating device adopts optical grating reflection spectrum schematic diagram (N=4).
Fig. 5 Y die cavity all-optical fiber hopping frequency millimeter wave generating device schematic diagram (N=8).
Fig. 6 Y die cavity all-optical fiber hopping frequency millimeter wave generating device adopts optical grating reflection spectrum schematic diagram (N=8).
Fig. 7 Y die cavity all-optical fiber hopping frequency millimeter wave generating device schematic diagram (N=16).
Fig. 8 Y die cavity all-optical fiber hopping frequency millimeter wave generating device adopts optical grating reflection spectrum schematic diagram (N=16).
Embodiment
Be further described below in conjunction with 1 to 8 pair of Y die cavity all-optical fiber hopping frequency millimeter wave generating device of accompanying drawing.
Embodiment one
Y die cavity all-optical fiber hopping frequency millimeter wave generating device, as shown in Figure 1, this device comprises: pumping source 1, band optical fiber grating 2, Active Optical Fiber 3,1 * 2 coupler 4, narrow band fiber grating 6,1 * 2 optical switch 5, the first narrow band fiber grating 71, the second narrow band fiber grating, 72,3 * 1 couplers 8, photodetector 9; Concrete connected mode is:
Band optical fiber grating 2 two ends connect pumping source 1 and Active Optical Fiber 3 one ends respectively, Active Optical Fiber 3 another termination 1 * 2 coupler 4 inputs, 4 one output ports of 1 * 2 coupler connect an end of narrow band fiber grating 6,1 * 2 coupler, 4 another output ports connect the light input end mouth of 1 * 2 optical switch 5, a termination 3 * 1 couplers 8 inputs of narrow band fiber grating 6;
The first passage port of one termination, 1 * 2 optical switch 5 of the first narrow band fiber grating 71, another termination 3 * 1 couplers 8 inputs of the first narrow band fiber grating 71;
The second channel port of one termination, 1 * 2 optical switch 5 of the second narrow band fiber grating 72, another termination 3 * 1 couplers 8 inputs of the second narrow band fiber grating 72;
3 * 1 couplers, 8 output ports connect photodetector 9.
N gets 2 in present embodiment one, and Active Optical Fiber 3 is selected Er-doped fiber for use.
Band optical fiber grating 2 reflected wave centre wavelength 1545.7nm bandwidth 1nm, narrow band fiber grating 6 reflected wave centre wavelength 1545.3nm bandwidth 0.1nm, the first narrow band fiber grating, 71 reflected wave centre wavelength 1545.7nm bandwidth 0.1nm, the second narrow band fiber grating, 72 reflected wave centre wavelength 1546.1nm bandwidth 0.1nm.
The reflection peak 10A of narrow band fiber grating 6 among the embodiment, the reflection peak 10C of the reflection peak 10B of the first narrow band fiber grating 71, the second narrow band fiber grating 72 is as Fig. 2.Band optical fiber grating 2 and narrow band fiber grating 6 are formed the linear resonant cavity that a resonance wavelength is fixed as 1545.3nm, when 1 * 2 optical switch 5 connects the first narrow band fiber grating 71, then the band optical fiber grating 2 and the first narrow band fiber grating 71 are formed another linear resonant cavity, resonance wavelength 1545.7nm, two linear resonant cavities forming the Y die cavity like this all are operated on the different resonance wavelength, the laser that penetrates wavelength 1545.3nm and 1545.7nm will be swashed, this two-way light obtains frequency 50GHz (corresponding to the 0.4nm wavelength interval) by photodetector 9 beats after being coupled to one the tunnel via 3 * 1 couplers 8; When 1 * 2 optical switch 5 connects the second arrowband grating 72, band optical fiber grating 2 and narrow band fiber grating 6 are formed the linear resonant cavity that a resonance wavelength is fixed as 1545.3nm, the band optical fiber grating 2 and the second narrow band fiber grating 72 are formed another linear resonant cavity, resonance wavelength 1546.1nm, two linear resonant cavities forming the Y die cavity like this all are operated on the different resonance wavelength, the laser that penetrates wavelength 1545.3nm and 1546.1nm will be swashed, this two-way light obtains frequency 100GHz (corresponding to the 0.8nm wavelength interval) by photodetector 9 beats after being coupled to one the tunnel via 3 * 1 couplers 8; Control 1 * 2 optical switch guide channel is selected different narrow band fiber gratings, and the millimeter wave of generation is realized the frequency hopping adjustment of 50GHz and two millimeter-wave frequencies of 100GHz.
Embodiment two
Y die cavity all-optical fiber hopping frequency millimeter wave generating device, as shown in Figure 3, this device comprises: pumping source 1, band optical fiber grating 2, Active Optical Fiber 3,1 * 2 coupler 4, narrow band fiber grating 6,1 * 4 optical switch 5, the first narrow band fiber grating 71, the second narrow band fiber grating 72, the 3rd narrow band fiber grating 73, the 4th narrow band fiber grating 74,5 * 1 couplers 8, photodetector 9; Concrete connected mode is:
Band optical fiber grating 2 two ends connect pumping source 1 and Active Optical Fiber 3 one ends respectively, Active Optical Fiber 3 another termination 1 * 2 coupler 4 inputs, 4 one output ports of 1 * 2 coupler connect an end of narrow band fiber grating 6,1 * 2 coupler, 4 another output ports connect the light input end mouth of 1 * 4 optical switch 5, a termination 5 * 1 couplers 8 inputs of narrow band fiber grating 6;
The first passage port of one termination, 1 * 4 optical switch 5 of the first narrow band fiber grating 71, another termination 5 * 1 couplers 8 inputs of the first narrow band fiber grating 71;
The second channel port of one termination, 1 * 4 optical switch 5 of the second narrow band fiber grating 72, another termination 5 * 1 couplers 8 inputs of the second narrow band fiber grating 72;
The third channel port of one termination, 1 * 4 optical switch 5 of the 3rd narrow band fiber grating 73, another termination 5 * 1 couplers 8 inputs of the 3rd narrow band fiber grating 73;
The four-way port of one termination, 1 * 4 optical switch 5 of the 4th narrow band fiber grating 74, another termination 5 * 1 couplers 8 inputs of the 4th narrow band fiber grating 74;
5 * 1 couplers, 8 output ports connect photodetector 9.
N gets 4 in present embodiment one, and Active Optical Fiber 3 is selected for use and mixed holmium optical fiber.
Band optical fiber grating 2 reflected wave centre wavelength 1545.9nm bandwidth 1.5nm, narrow band fiber grating 6 reflected wave centre wavelength 1545.3nm bandwidth 0.1nm, the first narrow band fiber grating, 71 reflected wave centre wavelength 1545.5nm bandwidth 0.1nm, the second narrow band fiber grating, 72 reflected wave centre wavelength 1545.9nm bandwidth 0.1nm, the 3rd narrow band fiber grating 73 reflected wave centre wavelength 1546.1nm bandwidth 0.1nm, the 4th narrow band fiber grating 74 reflected wave centre wavelength 1546.5nm bandwidth 0.1nm.
The reflection peak 10A of narrow band fiber grating 6 among the embodiment, the reflection peak 10B of the first narrow band fiber grating 71, the reflection peak 10C of the second narrow band fiber grating 72, the reflection peak 10D of the 3rd narrow band fiber grating 73, the reflection peak 10E of the 4th narrow band fiber grating 74, as Fig. 4, band optical fiber grating 2 and narrow band fiber grating 6 are formed the linear resonant cavity that a resonance wavelength is fixed as 1545.3nm, when 1 * 4 optical switch 5 connects the first narrow band fiber grating 71, then the band optical fiber grating 2 and the first narrow band fiber grating 71 are formed another linear resonant cavity, resonance wavelength 1545.5nm, two linear resonant cavities forming the Y die cavity like this all are operated on the different resonance wavelength, the laser that penetrates wavelength 1545.3nm and 1545.5nm will be swashed, this two-way light obtains frequency 25GHz (corresponding to the 0.2nm wavelength interval) by photodetector 9 beats after being coupled to one the tunnel via 5 * 1 couplers 8; When 1 * 4 optical switch 5 connects the second arrowband grating 72, band optical fiber grating 2 and narrow band fiber grating 6 are formed the linear resonant cavity that a resonance wavelength is fixed as 1545.3nm, the band optical fiber grating 2 and the second narrow band fiber grating 72 are formed another linear resonant cavity, resonance wavelength 1545.9nm, two linear resonant cavities forming the Y die cavity like this all are operated on the different resonance wavelength, the laser that penetrates wavelength 1545.3nm and 1545.9nm will be swashed, this two-way light obtains frequency 75GHz (corresponding to the 0.6nm wavelength interval) by photodetector 9 beats after being coupled to one the tunnel via 5 * 1 couplers 8; When 1 * 4 optical switch 5 connects the 3rd arrowband grating 73, band optical fiber grating 2 and narrow band fiber grating 6 are formed the linear resonant cavity that a resonance wavelength is fixed as 1545.3nm, band optical fiber grating 2 and the 3rd narrow band fiber grating 73 are formed another linear resonant cavity, resonance wavelength 1546.1nm, two linear resonant cavities forming the Y die cavity like this all are operated on the different resonance wavelength, the laser that penetrates wavelength 1545.3nm and 1546.1nm will be swashed, this two-way light obtains frequency 100GHz (corresponding to the 0.8nm wavelength interval) by photodetector 9 beats after being coupled to one the tunnel via 5 * 1 couplers 8; When 1 * 4 optical switch 5 connects the 4th arrowband grating 74, band optical fiber grating 2 and narrow band fiber grating 6 are formed the linear resonant cavity that a resonance wavelength is fixed as 1545.3nm, band optical fiber grating 2 and the 4th narrow band fiber grating 74 are formed another linear resonant cavity, resonance wavelength 1546.5nm, two linear resonant cavities forming the Y die cavity like this all are operated on the different resonance wavelength, the laser that penetrates wavelength 1545.3nm and 1546.5nm will be swashed, this two-way light obtains frequency 150GHz (corresponding to the 1.2nm wavelength interval) by photodetector 9 beats after being coupled to one the tunnel via 5 * 1 couplers 8; Control 1 * 4 optical switch guide channel is selected different narrow band fiber gratings, and the millimeter wave of generation is realized the frequency hopping adjustment of 25GHz, 75GHz, 100GHz and four millimeter-wave frequencies of 150GHz.
Embodiment three
Y die cavity all-optical fiber hopping frequency millimeter wave generating device, as shown in Figure 5, this device comprises: pumping source 1, band optical fiber grating 2, Active Optical Fiber 3,1 * 2 coupler 4, narrow band fiber grating 6,1 * 8 optical switch 5, the first narrow band fiber grating 71, the second narrow band fiber grating 72...... the 8th narrow band fiber grating, 78,9 * 1 couplers 8, photodetector 9; Concrete connected mode is:
Band optical fiber grating 2 two ends connect pumping source 1 and Active Optical Fiber 3 one ends respectively, Active Optical Fiber 3 another termination 1 * 2 coupler 4 inputs, 4 one output ports of 1 * 2 coupler connect an end of narrow band fiber grating 6,1 * 2 coupler, 4 another output ports connect the light input end mouth of 1 * 8 optical switch 5, a termination 9 * 1 couplers 8 inputs of narrow band fiber grating 6;
The first passage port of one termination, 1 * 8 optical switch 5 of the first narrow band fiber grating 71, another termination 9 * 1 couplers 8 inputs of the first narrow band fiber grating 71;
The second channel port of one termination, 1 * 8 optical switch 5 of the second narrow band fiber grating 72, another termination 9 * 1 couplers 8 inputs of the second narrow band fiber grating 72;
......
The 8th access port of one termination, 1 * 8 optical switch 5 of the 8th narrow band fiber grating 78, another termination 9 * 1 couplers 8 inputs of the 8th narrow band fiber grating 78;
9 * 1 couplers, 8 output ports connect photodetector 9.
N gets 8 in present embodiment one, and Active Optical Fiber 3 is selected er-doped ytterbium optical fiber for use.
Band optical fiber grating 2 reflected wave centre wavelength 1546.2nm bandwidth 2nm, narrow band fiber grating 6 reflected wave centre wavelength 1545.3nm bandwidth 0.1nm, the first narrow band fiber grating, 71 reflected wave centre wavelength 1545.7nm bandwidth 0.1nm, the second narrow band fiber grating, 72 reflected wave centre wavelength 1545.9nm bandwidth 0.1nm... the 8th narrow band fiber grating, 78 reflected wave centre wavelength 1547.1nm bandwidth 0.1nm.
The reflection peak 10A of narrow band fiber grating 6 among the embodiment, the reflection peak 10B of the first arrowband grating 71, the reflection peak 10I of reflection peak 10C... the 8th narrow band fiber grating 78 of the second narrow band fiber grating 72, as Fig. 6, band optical fiber grating 2 and narrow band fiber grating 6 are formed the linear resonant cavity that a resonance wavelength is fixed as 1545.3nm, when 1 * 8 optical switch 5 connects the first arrowband grating 71, then the band optical fiber grating 2 and the first narrow band fiber grating 71 are formed another linear resonant cavity, resonance wavelength 1545.7nm, two linear resonant cavities forming the Y die cavity like this all are operated on the different resonance wavelength, the laser that penetrates wavelength 1545.3nm and 1545.7nm will be swashed, this two-way light obtains frequency 50GHz (corresponding to the 0.4nm wavelength interval) by photodetector 9 beats after being coupled to one the tunnel via 9 * 1 couplers 8; When 1 * 8 optical switch 5 connects the second arrowband grating 72, band optical fiber grating 2 and narrow band fiber grating 6 are formed the linear resonant cavity that a resonance wavelength is fixed as 1545.3nm, the band optical fiber grating 2 and the second narrow band fiber grating 72 are formed another linear resonant cavity, resonance wavelength 1545.9nm, two linear resonant cavities forming the Y die cavity like this all are operated on the different resonance wavelength, the laser that penetrates wavelength 1545.3nm and 1545.9nm will be swashed, this two-way light obtains frequency 75GHz (corresponding to the 0.6nm wavelength interval) by photodetector 9 beats after being coupled to one the tunnel via 9 * 1 couplers 8; ... when 1 * 8 optical switch 5 connects the 8th arrowband grating 78, band optical fiber grating 2 and narrow band fiber grating 6 are formed the linear resonant cavity that a resonance wavelength is fixed as 1545.3nm, band optical fiber grating 2 and the 8th narrow band fiber grating 78 are formed another linear resonant cavity, resonance wavelength 1547.1nm, two linear resonant cavities forming the Y die cavity like this all are operated on the different resonance wavelength, the laser that penetrates wavelength 1545.3nm and 1547.1nm will be swashed, after this two-way light is coupled to one the tunnel via 5 * 1 couplers 8, obtain frequency 225GHz (corresponding to the 1.8nm wavelength interval) control 1 * 8 optical switch pathway by photodetector 9 beats and select different narrow band fiber gratings, the millimeter wave of generation is realized 50GHz, 75GHz... and the frequency hopping adjustment of eight millimeter-wave frequencies of 225GHz.
Embodiment four
Y die cavity all-optical fiber hopping frequency millimeter wave generating device, as shown in Figure 7, this device comprises: pumping source 1, band optical fiber grating 2, Active Optical Fiber 3,1 * 2 coupler 4, narrow band fiber grating 6,1 * 16 optical switch 5, the first narrow band fiber grating 71, the second narrow band fiber grating 72...... the 16th narrow band fiber grating, 716,17 * 1 couplers 8, photodetector 9; Concrete connected mode is:
Band optical fiber grating 2 two ends connect pumping source 1 and Active Optical Fiber 3 one ends respectively, Active Optical Fiber 3 another termination 1 * 2 coupler 4 inputs, 4 one output ports of 1 * 2 coupler connect an end of narrow band fiber grating 6,1 * 2 coupler, 4 another output ports connect the light input end mouth of 1 * 16 optical switch 5, a termination 17 * 1 couplers 8 inputs of narrow band fiber grating 6;
The first passage port of one termination, 1 * 16 optical switch 5 of the first narrow band fiber grating 71, another termination 17 * 1 couplers 8 inputs of the first narrow band fiber grating 71;
The second channel port of one termination, 1 * 16 optical switch 5 of the second narrow band fiber grating 72, another termination 17 * 1 couplers 8 inputs of the second narrow band fiber grating 72;
......
The 16 access port of one termination, 1 * 16 optical switch 5 of the 16 narrow band fiber grating 716, another termination 17 * 1 couplers 8 inputs of the 16 narrow band fiber grating 716;
17 * 1 couplers, 8 output ports connect photodetector 9.
N gets 16 in present embodiment one, and Active Optical Fiber 3 is selected Yb dosed optical fiber for use.
Band optical fiber grating 2 reflected wave centre wavelength 1546.9nm bandwidth 4nm, narrow band fiber grating 6 reflected wave centre wavelength 1545.3nm bandwidth 0.1nm, the first narrow band fiber grating, 71 reflected wave centre wavelength 1545.6nm bandwidth 0.1nm, the second narrow band fiber grating, 72 reflected wave centre wavelength 1545.8nm bandwidth 0.1nm... the 16 narrow band fiber grating, 716 reflected wave centre wavelength 1548.6nm bandwidth 0.1nm.
The reflection peak 10A of narrow band fiber grating 6 among the embodiment, the reflection peak 10B of the first narrow band fiber grating 71, the reflection peak 10Q of reflection peak 10C... the 16 narrow band fiber grating 716 of the second narrow band fiber grating 72, as Fig. 8, band optical fiber grating 2 and narrow band fiber grating 6 are formed the linear resonant cavity that a resonance wavelength is fixed as 1545.3nm, when 1 * 16 optical switch 5 connects the first narrow band fiber grating 71, then the band optical fiber grating 2 and the first narrow band fiber grating 71 are formed another linear resonant cavity, resonance wavelength 1545.6nm, two linear resonant cavities forming the Y die cavity like this all are operated on the different resonance wavelength, the laser that penetrates wavelength 1545.3nm and 1545.6nm will be swashed, this two-way light obtains frequency 37.5GHz (corresponding to the 0.3nm wavelength interval) by photodetector 9 beats after being coupled to one the tunnel via 17 * 1 couplers 8; When 1 * 16 optical switch 5 connects the second arrowband grating 72, band optical fiber grating 2 and narrow band fiber grating 6 are formed the linear resonant cavity that a resonance wavelength is fixed as 1545.3nm, the band optical fiber grating 2 and the second narrow band fiber grating 72 are formed another linear resonant cavity, resonance wavelength 1545.8nm, two linear resonant cavities forming the Y die cavity like this all are operated on the different resonance wavelength, the laser that penetrates wavelength 1545.3nm and 1545.8nm will be swashed, this two-way light obtains frequency 62.5GHz (corresponding to the 0.5nm wavelength interval) by photodetector 9 beats after being coupled to one the tunnel via 17 * 1 couplers 8; ... when 1 * 16 optical switch 5 connects the 16 arrowband grating 716, band optical fiber grating 2 and narrow band fiber grating 6 are formed the linear resonant cavity that a resonance wavelength is fixed as 1545.3nm, band optical fiber grating 2 and the 16 narrow band fiber grating 716 are formed another linear resonant cavity, resonance wavelength 1548.6nm, two linear resonant cavities forming the Y die cavity like this all are operated on the different resonance wavelength, the laser that penetrates wavelength 1545.3nm and 1548.6nm will be swashed, after this two-way light is coupled to one the tunnel via 17 * 1 couplers 8, obtain frequency 412.5GHz (corresponding to the 3.3nm wavelength interval) control 1 * 16 optical switch guide channel by photodetector 9 beats and select different narrow band fiber gratings, the millimeter wave of generation is realized 37.5GHz, 62.5GHz... and the frequency hopping adjustment of 16 millimeter-wave frequencies of 412.5GHz.
Claims (3)
1.Y the die cavity all-optical fiber hopping frequency millimeter wave generating device is characterized in that: this device comprises: pumping source (1), band optical fiber grating (2), Active Optical Fiber (3), 1 * 2 coupler (4), narrow band fiber grating (6), 1 * N optical switch (5), the first narrow band fiber grating (71), the second narrow band fiber grating (72) ... N narrow band fiber grating (7N), (N+1) * 1 coupler (8), photodetector (9); Concrete connected mode is:
Band optical fiber grating (2) two ends connect pumping source (1) and Active Optical Fiber (3) one ends respectively, Active Optical Fiber (3) another port connects 1 * 2 coupler (4) input, (4) output ports of 1 * 2 coupler connect an end of narrow band fiber grating (6), and another output port of 1 * 2 coupler (4) connects the light input end mouth of 1 * N optical switch (5); Another termination (N+1) * 1 coupler (8) input of narrow band fiber grating (6);
The first passage port of one termination, 1 * N optical switch (5) of the first narrow band fiber grating (71), another termination (N+1) * 1 coupler (8) input of the first narrow band fiber grating (71);
The second channel port of one termination, 1 * N optical switch (5) of the second narrow band fiber grating (72), another termination (N+1) * 1 coupler (8) input of the second narrow band fiber grating (72);
…
The N access port of one termination, 1 * N optical switch (5) of N narrow band fiber grating (7N), another termination (N+1) * 1 coupler (8) input of N narrow band fiber grating (7N);
(N+1) * 1 coupler (8) output port connects photodetector (9).
2. Y die cavity all-optical fiber hopping frequency millimeter wave generating device according to claim 1 is characterized in that:
Active Optical Fiber (3) is selected er-doped for use or is mixed ytterbium or mix holmium or the ytterbium erbium is mixed or mixed thorium altogether or mixes praseodymium or neodymium-doped fiber;
The narrow band fiber grating (6) and the first narrow band fiber grating (71), the second narrow band fiber grating (72) ... the reflection wavelength of N narrow band fiber grating (7N) does not overlap mutually;
Narrow band fiber grating (6), the first narrow band fiber grating (71), the second narrow band fiber grating ((72) ... the reflection wavelength of N narrow band fiber grating (7N) is all in the reflection bandwidth of band optical fiber grating (2).
3. Y die cavity all-optical fiber hopping frequency millimeter wave generating device according to claim 1 and 2, it is characterized in that: during the first passage port of a termination 1 * N optical switch (5) of the first narrow band fiber grating (71), narrow band fiber grating (6) forms an independently line style resonant cavity with band optical fiber grating (2); The first narrow band fiber grating (71) forms an independently line style resonant cavity with band optical fiber grating (2); Two linear resonant cavities forming the Y die cavity like this all are operated on the different resonance wavelength, produce the two-way different wavelength of laser, locate difference frequency at photodetector (9), produce millimeter wave;
During the second channel port of one termination, 1 * N optical switch (5) of the second narrow band fiber grating (72), narrow band fiber grating (6) forms an independently line style resonant cavity with band optical fiber grating (2); The second narrow band fiber grating (72) forms an independently line style resonant cavity with band optical fiber grating (2); Two linear resonant cavities forming the Y die cavity like this all are operated on the different resonance wavelength, produce the two-way different wavelength of laser, locate difference frequency at photodetector (9), produce millimeter wave;
…
During the N access port of one termination, 1 * N optical switch (5) of N narrow band fiber grating (7N), narrow band fiber grating (6) forms an independently line style resonant cavity with band optical fiber grating (2); N narrow band fiber grating (7N) forms an independently line style resonant cavity with band optical fiber grating (2); Two linear resonant cavities forming the Y die cavity like this all are operated on the different resonance wavelength, produce the two-way different wavelength of laser, locate difference frequency at photodetector (9), produce millimeter wave; N 〉=2, N≤16;
Control 1 * N optical switch (5) closes guide channel selects first or second ... or N narrow band fiber grating, the millimeter wave that produces is realized the frequency hopping adjustment.
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| CN105896255A (en) * | 2016-06-21 | 2016-08-24 | 上海理工大学 | Adjustable picosecond solid laser system |
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| US6320539B1 (en) * | 2000-06-09 | 2001-11-20 | The United States Of America As Represented By The Secretary Of The Navy | Fiber-optic, wideband array antenna beamformer |
| CN100524977C (en) * | 2007-11-08 | 2009-08-05 | 北京交通大学 | Transmission device generating micro-wave and mm wave by using linear cavity dual-wave optical fiber laser |
| CN100536261C (en) * | 2007-11-08 | 2009-09-02 | 北京交通大学 | Device for single polarization dual-wavelength fiber grating laser to generate microwave, millimeter wave |
| CN101321018B (en) * | 2008-07-15 | 2011-06-22 | 北京交通大学 | Microwave/millimeter wave generator based on array wave-guide optical grating and optical fiber optical grating |
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2009
- 2009-11-20 CN CN2009102384359A patent/CN101714739B/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102394465A (en) * | 2011-10-26 | 2012-03-28 | 江苏省邮电规划设计院有限责任公司 | Single longitudinal mode laser device capable of switching wavelengths |
| CN103280689A (en) * | 2013-05-29 | 2013-09-04 | 中国科学院半导体研究所 | Fiber laser outputting waves of different lengths |
| CN105896262A (en) * | 2016-06-21 | 2016-08-24 | 上海理工大学 | Adjustable picosecond optical fibre laser system |
| CN105896255A (en) * | 2016-06-21 | 2016-08-24 | 上海理工大学 | Adjustable picosecond solid laser system |
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