CN203164550U - Frequency-selecting filter based on micro-ring resonant cavity - Google Patents
Frequency-selecting filter based on micro-ring resonant cavity Download PDFInfo
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- CN203164550U CN203164550U CN 201320161088 CN201320161088U CN203164550U CN 203164550 U CN203164550 U CN 203164550U CN 201320161088 CN201320161088 CN 201320161088 CN 201320161088 U CN201320161088 U CN 201320161088U CN 203164550 U CN203164550 U CN 203164550U
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- fiber coupler
- frequency
- resonant cavity
- ring resonant
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Abstract
The utility model discloses a frequency-selecting filter based on a micro-ring resonant cavity. The frequency-selecting filter comprises the micro-ring resonant cavity, a first main waveguide, a second main waveguide, a first optical fiber coupler and a second optical fiber coupler, wherein the micro-ring resonant cavity is connected with the first main waveguide through the first optical fiber coupler; an Input end of the first main waveguide is a signal input end of the frequency-selecting filter; a Through end of the first main waveguide is a first signal output end of the frequency-selecting filter; the micro-ring resonant cavity is connected with the second main waveguide through the second optical fiber coupler; a Drop end of the second main waveguide is a second signal output end of the frequency-selecting filter; a first KDP (potassium dihydrogen phosphate) modulator is connected between the first optical fiber coupler and the second optical fiber coupler on one side of the micro-ring resonant cavity; a second KDP modulator is connected between the first optical fiber coupler and the second optical fiber coupler on the other side of the micro-ring resonant cavity; and both the first KDP modulator and the second KDP modulator are connected with a power supply. The frequency-selecting filter has the advantages as follows: the size is small, an optical fiber system can be integrated easily, the sensitivity is high, the tuning speed is high, and the like.
Description
Technical field
The utility model belongs to the optical information technical field, is specifically related to a kind of frequency-selecting filter based on micro-ring resonant cavity.
Background technology
Along with communication technology ground high speed development, the micro-ring resonant wave filter is subjected to technician's extensive concern and research, has more and more important effect in the optical communication technique field.The radius of micro-ring resonant cavity very little (micron level), similar with the optical wavelength size, therefore, but it has very high integration.Light in resonator cavity repeatedly circulation back export from straight-through end (through) and the following terminal (drop) of this structure: when light wave and resonator cavity reach phase matching, light could be from the following terminal output of system, and the optical wavelength of this moment is the resonance wavelength of resonance cavity system.But not therefore the light of resonance wavelength will lead directly to the transmission curve that end can obtain caving in, thereby realize the frequency-selective filtering function of micro-ring resonant cavity from the straight-through end output of this structure; And the micro-ring resonant cavity wavelength selects to have very high high sensitivity: namely the subtle change of resonator cavity effective refractive index just can cause the variation of output wavelength.
Yet all there are some shortcomings separately in existing tunable optic filter, and for example, the tuned speed of AWG tunable optic filter is slow; The filtering bandwidth of acousto-optic tunable filter is big, power consumption is high, complex structure; Etc..
Summary of the invention
The utility model provides a kind of frequency-selecting filter based on micro-ring resonant cavity.The utility model frequency-selecting filter has that volume is little, to be easy to fibre system integrated, highly sensitive, and advantage such as tuned speed is fast is particularly suitable for the application in the optical communication system technology.
The utility model is taked following technical scheme: based on the frequency-selecting filter of micro-ring resonant cavity, comprise first power supply (1), second source (6), the first main waveguide BW1 (7), the second main waveguide BW2 (2), the first fiber coupler C
1(8), the second fiber coupler C
2(3), a KDP modulator (4), the 2nd KDP modulator (5) and micro-ring resonant cavity (9); Micro-ring resonant cavity (9) is by the first fiber coupler C
1(8) and the first main waveguide BW1 (7) link, wherein, Input end is the signal input part of this frequency-selecting filter, the Through end is one of them signal output part of this frequency-selecting filter---straight-through end.Micro-ring resonant cavity (9) is also by the second fiber coupler C
2(3) and the second main waveguide BW2 (2) link, wherein, Drop end is another signal output part of this frequency-selecting filter---following terminal.Side (two fiber coupler C at micro-ring resonant cavity (9)
1And C
2Between) connection the one KDP modulator (4), opposite side (two fiber coupler C
1And C
2Between) connect the 2nd KDP modulator (5), all connect power supply on two modulators, namely a KDP modulator (4) is connected first power supply (1), and the 2nd KDP modulator (5) is connected second source (6).
Light wave is from the Input end input of the first main waveguide BW1, and part light is through coupling mechanism C
1Be coupled into ring in a subtle way, the light that satisfies condition of resonance passes through coupling mechanism C again
2Coupling, again by the left end of the second main waveguide BW2---following terminal output, but not the light of resonance wavelength is then by right-hand member---the straight-through end output of the first main waveguide BW1, thus realized the frequency-selective filtering function of this micro-ring resonant cavity configuration.
Preferably, the cross-coupling coefficient of 2 of this frequency-selecting filter fiber couplers is 0.3.
Preferably, the input of this frequency-selecting filter is continuous wave signal.
Characteristics of the present utility model are to have increased by two KDP modulators in micro-ring resonant cavity.The KDP modulator is to be made of the KDP electro-optic crystal, its principle of work is based on electrooptical effect: under the effect of applying direct current electric field or low-frequency current field, the variation linear with extra electric field takes place in the refractive index of medium, makes the also variation thereupon of phase place by the light of waveguide.
The utility model utilizes the FDP modulator to realize frequency-selective filtering function based on micro-ring resonant cavity.When connecting power supply, because the effect of KDP modulator, the effective refractive index of micro-ring resonant cavity changes, and causes that the phase place of the light that transmits in little ring changes, and finally will cause the variation of the resonance wavelength of micro-ring resonant cavity.The micro-ring resonant cavity wavelength selects to have very high sensitivity: namely the subtle change of resonator cavity effective refractive index just can cause the variation of output wavelength.Suitably the regulation voltage size can realize the output of any resonance wavelength.
The utility model frequency-selecting filter have volume little, be easy to advantages such as fibre system is integrated, highly sensitive, tuned speed is fast, be particularly suitable for the application in the optical communication system technology.
Description of drawings
Fig. 1 is the structural representation based on the frequency-selecting filter of micro-ring resonant cavity.
Among Fig. 1, A
1Expression input light field, a
dExpression is terminal transmission light field down, a
tThe straight-through end of expression transmission light field.
Fig. 2 is the curve of output that does not have two output terminals of system under the impressed voltage situation.
Among Fig. 2, T
dExpression is the terminal transmissivity down, T
tThe straight-through end of expression transmissivity.
Fig. 3 is the curve of output that two impressed voltages are two output terminals of system under the 2V situation.
Among Fig. 3, T
dExpression is the terminal transmissivity down, T
tThe straight-through end of expression transmissivity.
Embodiment
Below in conjunction with accompanying drawing the utility model embodiment is elaborated.
As shown in Figure 1, present embodiment comprises power supply 1, power supply 6, main waveguide BW17, main waveguide BW22, fiber coupler C based on the frequency-selecting filter of micro-ring resonant cavity
18, fiber coupler C
23, KDP modulator 4, KDP modulator 5 and micro-ring resonant cavity 9.Wherein, the cross-coupling coefficient of two fiber couplers is 0.3.
Micro-ring resonant cavity 9 is by fiber coupler C
1Link with main waveguide BW1, wherein, the Input end is the signal input part of this frequency-selecting filter, and the Through end is one of them signal output part of this frequency-selecting filter---straight-through end.Micro-ring resonant cavity 9 is also by fiber coupler C
2Link with main waveguide BW2, wherein, the Drop end is another signal output part of this frequency-selecting filter---following terminal.Side (two fiber coupler C at micro-ring resonant cavity 9
1And C
2Between) connection KDP modulator 4, opposite side (two fiber coupler C
1And C
2Between) also connect on 5, two modulators of KDP modulator and all connect power supply, that is: KDP modulator 4 links with power supply 1, and KDP modulator 5 and power supply 6 link.
When Input end input continuous wave signal, part light is through fiber coupler C
1Be coupled in a subtle way ring, when light signal transmit the phase place that produces in a week and is the integral multiple of 2 π in micro-ring resonant cavity, namely satisfy condition of resonance: β L=2q π (q=1,2, light 3...) passes through fiber coupler C
2Coupling, again by the left end of main waveguide BW2---following terminal output, but not the light of resonance wavelength is then by right-hand member---the straight-through end output of main waveguide BW1.Suitably regulate the power supply size, under the effect of KDP modulator, corresponding skew can take place in the export resonance wavelength of frequency-selecting filter.
As shown in Figure 2, during U=0V, the transmissivity of the straight-through end of system and following terminal.As shown in Figure 3, during U=2V, the transmissivity of the straight-through end of system and following terminal.Comparison diagram 2 and Fig. 3 can find that when input voltage changes the export resonance wavelength of system is offset.Explanation can be controlled output wavelength by the size of regulating input voltage.
The frequency-selective filtering process of the utility model frequency-selecting filter:
1, according to required wavelength of optical signal or frequency, select the appropriate signal wavelength to satisfy the condition of resonance of micro-ring resonant cavity.
2, according to the export resonance wavelength of straight-through end and following terminal, adjust the power supply size, thereby obtain required resonance wavelength.
More than preferred embodiment of the present utility model and principle are had been described in detail; for those of ordinary skill in the art; according to the thought that the utility model provides, the part that on embodiment, can change, and these changes also should be considered as protection domain of the present utility model.
Claims (3)
1. based on the frequency-selecting filter of micro-ring resonant cavity, comprise micro-ring resonant cavity (9), the first main waveguide (7), the second main waveguide (2), first fiber coupler (8) and second fiber coupler (3), micro-ring resonant cavity (9) links by first fiber coupler (8) and the first main waveguide (7), wherein, the Input end of the first main waveguide (7) is the signal input part of described frequency-selecting filter, and the Through end of the first main waveguide (7) is first signal output part of described frequency-selecting filter; Micro-ring resonant cavity (9) links by second fiber coupler (3) and the second main waveguide (2), and wherein, the Drop of the second main waveguide (2) end is the secondary signal output terminal of described frequency-selecting filter; It is characterized in that: micro-ring resonant cavity (9) one sides connect a KDP modulator (4) between first fiber coupler (8) and second fiber coupler (3), opposite side connects the 2nd KDP modulator (5) between first fiber coupler (8) and second fiber coupler (3), a KDP modulator (4), the 2nd KDP modulator (5) are all connected power supply.
2. frequency-selecting filter as claimed in claim 1, it is characterized in that: the cross-coupling coefficient of described first fiber coupler (8), second fiber coupler (3) is 0.3.
3. frequency-selecting filter as claimed in claim 1 or 2, it is characterized in that: the input of described frequency-selecting filter is continuous wave signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320161088 CN203164550U (en) | 2013-04-02 | 2013-04-02 | Frequency-selecting filter based on micro-ring resonant cavity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320161088 CN203164550U (en) | 2013-04-02 | 2013-04-02 | Frequency-selecting filter based on micro-ring resonant cavity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203164550U true CN203164550U (en) | 2013-08-28 |
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|---|---|---|---|
| CN 201320161088 Withdrawn - After Issue CN203164550U (en) | 2013-04-02 | 2013-04-02 | Frequency-selecting filter based on micro-ring resonant cavity |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103163664A (en) * | 2013-04-02 | 2013-06-19 | 杭州电子科技大学 | Frequency-selective wave filter based on micro-ring resonant cavity |
| CN103698906A (en) * | 2013-12-19 | 2014-04-02 | 杭州电子科技大学 | Frequency adjustable filter based on Mach-Zehnder electro-optic modulator |
| CN104966989A (en) * | 2015-06-29 | 2015-10-07 | 武汉光迅科技股份有限公司 | External cavity laser with tunable wavelength and adjustable light emitting module |
| CN113777714A (en) * | 2021-09-30 | 2021-12-10 | 深圳中科天鹰科技有限公司 | Tunable optical switch, optical network node and optical network |
-
2013
- 2013-04-02 CN CN 201320161088 patent/CN203164550U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103163664A (en) * | 2013-04-02 | 2013-06-19 | 杭州电子科技大学 | Frequency-selective wave filter based on micro-ring resonant cavity |
| CN103698906A (en) * | 2013-12-19 | 2014-04-02 | 杭州电子科技大学 | Frequency adjustable filter based on Mach-Zehnder electro-optic modulator |
| CN104966989A (en) * | 2015-06-29 | 2015-10-07 | 武汉光迅科技股份有限公司 | External cavity laser with tunable wavelength and adjustable light emitting module |
| CN104966989B (en) * | 2015-06-29 | 2018-12-25 | 武汉光迅科技股份有限公司 | Wavelength-tunable external cavity laser and adjustable optical transmitter module |
| US10256606B2 (en) | 2015-06-29 | 2019-04-09 | Accelink Technologies Co., Ltd. | Wavelength-tunable external-cavity laser and adjustable light emission module |
| CN113777714A (en) * | 2021-09-30 | 2021-12-10 | 深圳中科天鹰科技有限公司 | Tunable optical switch, optical network node and optical network |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130828 Effective date of abandoning: 20151007 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |