CN102162913A - Tunable filter - Google Patents
Tunable filter Download PDFInfo
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- CN102162913A CN102162913A CN 201110093687 CN201110093687A CN102162913A CN 102162913 A CN102162913 A CN 102162913A CN 201110093687 CN201110093687 CN 201110093687 CN 201110093687 A CN201110093687 A CN 201110093687A CN 102162913 A CN102162913 A CN 102162913A
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Abstract
The invention discloses a tunable filter. The tunable filter comprises two ultrathin multi-cavity etalons and a cavity length control module, wherein the two ultrathin multi-cavity etalons are combined and arranged on the cavity length control module. The ultrathin multi-cavity etalon has an ultrathin thickness, the single passband period of the etalon is larger than the C-waveband range, and the passband bandwidth has the feature of a flat top. The cavity length control module can simultaneously control the cavity length changes of the two ultrathin multi-cavity etalons to make the center wavelengths thereof move in the same direction. The transmission wavelengths of the etalons can move at the same speed in the same direction by stacking the edges of the transmission peaks in tandem of the two etalons to form the filter, so as to achieve the tunable filter. The tunable filter has the advantages of simple structure and low cost, and is easy to realize.
Description
Technical field
The present invention relates to the optical fiber communication technology field, especially relate to a kind of tunable optical filter device.
Background technology
The light filter plate plays an important role in Fiber Optical Communication System as a kind of wavelength selector spare.As the squelch of the reflecting cavity mirror of semiconductor laser or fiber laser and narrow bandwidth filtering, multiplexing demultiplexing device, image intensifer, wavelength selector, wavelength shifter, dispersion wavelength device and extender etc.
The scheme that realizes at present tunable optical filtering has multiple, as based on the wave filter in F-P chamber, wave filter, Mach-Zehnder (MZ) interferometer filter, medium membranous type interference filter etc. based on grating.Adjustable light wave-filter of a great variety, various informative.At present, adopt motor to drive single tunable optical filter, its incident angle of light is changed, thereby the method that transmission peak wavelength is changed is a focus, but its key element motor and adjustable optical filter cost an arm and a leg at present.
Summary of the invention
The object of the present invention is to provide a kind of low price, simple in structure and can realize the adjustable optical filter device of identical function.
For achieving the above object, technical scheme proposed by the invention is: a kind of adjustable optical filter comprises two ultra-thin multi-cavity etalons and the long control module in chamber; Two ultra-thin multi-cavity etalons are used in combination, and are arranged on the long control module in chamber; Described ultra-thin multi-cavity etalon as thin as a wafer, the single cycle of its passband is greater than the C-band scope, and pass band width has the characteristics of top flat; The long control module in described chamber is controlled long variation the in chamber of two ultra-thin multi-cavity etalons simultaneously, and its centre wavelength is moved towards same direction.
Further, described ultra-thin multi-cavity etalon comprises the above multi-cavity structure in two chambeies and two chambeies, is Solid Cavity or air chamber structure, the perhaps cascade structure of both combinations.
Preferably, described ultra-thin multi-cavity etalon can be made by heat-sensitive material or electrooptical material, and the long control module in chamber corresponding with it is respectively temperature control modules or electric control module.
Further, for the ultra-thin multi-cavity etalon of air chamber structure, can also adopt the mode of control of PZT piezoelectric ceramics or thermal conditioning to control the long variation in its chamber, to realize moving of its filtering wavestrip.
Beneficial effect of the present invention: a kind of adjustable optical filter of the present invention is simple in structure, and cost is low, is easy to realize industrialization production.
Description of drawings
Fig. 1 is a kind of adjustable optical filter principle of work synoptic diagram of the present invention;
Fig. 2 is a kind of adjustable optical filter example structure synoptic diagram of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
Principle of the present invention as shown in Figure 1,1, the 2 single cycle of passband of two ultra-thin multi-cavity etalons is all greater than treating tuning band 3, i.e. C-band; Ultra-thin multi-cavity etalon requires its pass band width to have the characteristics of top flat, and its passband edge can effectively be utilized; Make two the tandem passband of ultra-thin multi-cavity etalon 1,2 edge stacks, can obtain the transmission peak wavelength 4 of system.
Be illustrated in figure 2 as embodiments of the invention, make two ultra-thin two-chambers or multi-cavity etalon 101,102, require the passband of etalon to have the cycle greater than C-band scope and two characteristics of top flat.By FSR=C/2nd, can calculate light path nd=C/2FSR, C is a light speed in a vacuum in the formula, and n is the etalon refractive index, and d is an etalon thickness, requires FSR greater than the C-band scope, then can obtain light path nd and be less than 25 microns.To two ultra-thin etalons 101,102 structures are carried out initialization, make its passband 1,2 edges are superimposed, the bandwidth of stack can be provided with as required, passband after the stack has just formed a kind of pass band width of tunable filtering sheet like this, and as Fig. 1, the transmission peak wavelength of system promptly is the stack of the transmission peak wavelength separately of two ultra-thin multi-cavity etalons.
After the initialization, two ultra-thin multi-cavity etalons 101,102 are placed on the same platform, as shown in Figure 2, can be on the TEC platform 103 of control temperature, light passes through two ultra-thin multi-cavity etalons 101 with order, 102 back and outgoing are carried out temperature control simultaneously to two etalons, and the centre wavelength of two etalons is moved towards same direction, the transmission peak wavelength bandwidth of system will remain unchanged so, and along with two etalons move to same direction.Because the transmission peak wavelength bandwidth of this system can be provided with arbitrarily as required, thus more much smaller than the bandwidth of single etalon, again because the combination of this etalon has movably characteristics of transmission peak wavelength, therefore just realized a kind of function of adjustable optical filter.
The material of etalon can be a heat-sensitive material, also can be electrooptical material; For the ultra-thin multi-cavity etalon that electrooptical material is made, the long control module correspondence in its chamber can use electric control module.The structure of etalon can be that the Solid Cavity structure also can be air chamber structure or the combination of the two; For the etalon that uses the air chamber structure, can adopt the mode of control of PZT piezoelectric ceramics or thermal conditioning to control the long variation in its chamber, to realize moving of optical filter filtering wavestrip.
Although specifically show and introduced the present invention in conjunction with preferred embodiment; but the those skilled in the art should be understood that; in the spirit and scope of the present invention that do not break away from appended claims and limited; in the form and details the present invention is made various variations, be protection scope of the present invention.
Claims (5)
1. an adjustable optical filter is characterized in that: comprise two ultra-thin multi-cavity etalons and the long control module in chamber; Two ultra-thin multi-cavity etalons are used in combination, and are arranged on the long control module in chamber; The described ultra-thin single cycle of multi-cavity etalon pass band is greater than the C-band scope, and pass band width has the characteristics of top flat; The long control module in described chamber is controlled long variation the in chamber of two ultra-thin multi-cavity etalons simultaneously.
2. a kind of adjustable optical filter as claimed in claim 1 is characterized in that: described ultra-thin multi-cavity etalon comprises the above multi-cavity structure in two chambeies and two chambeies, is Solid Cavity or air chamber structure, the perhaps cascade structure of both combinations.
3. a kind of adjustable optical filter as claimed in claim 1 is characterized in that: described ultra-thin multi-cavity etalon is made by heat-sensitive material; The long control module in described chamber is a temperature control modules.
4. a kind of adjustable optical filter as claimed in claim 1 is characterized in that: described ultra-thin multi-cavity etalon is made by electrooptical material; The long control module in described chamber is an electric control module.
5. a kind of adjustable optical filter as claimed in claim 2 is characterized in that: the ultra-thin multi-cavity etalon of described air chamber structure adopts the mode of control of PZT piezoelectric ceramics or thermal conditioning to control the long variation in its chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110093687 CN102162913A (en) | 2011-04-14 | 2011-04-14 | Tunable filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110093687 CN102162913A (en) | 2011-04-14 | 2011-04-14 | Tunable filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102162913A true CN102162913A (en) | 2011-08-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110093687 Pending CN102162913A (en) | 2011-04-14 | 2011-04-14 | Tunable filter |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103676134A (en) * | 2012-08-31 | 2014-03-26 | 福州高意通讯有限公司 | Double-cavity etalon |
| CN110737113A (en) * | 2018-07-18 | 2020-01-31 | 福州高意通讯有限公司 | small-sized adjustable wavelength optical filter |
| CN110764174A (en) * | 2019-10-28 | 2020-02-07 | 中山大学 | Dielectric grating narrow-band filter and manufacturing method thereof |
| CN113791473A (en) * | 2021-10-27 | 2021-12-14 | 福州高意光学有限公司 | Heat adjustable optical switch |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1721887A (en) * | 2004-07-16 | 2006-01-18 | 亚洲光学股份有限公司 | CWDM light filter |
| CN1849733A (en) * | 2003-09-10 | 2006-10-18 | 英特尔公司 | Seeking and tracking control for locking to transmision peak for a tunable laser |
| CN201035181Y (en) * | 2007-04-11 | 2008-03-12 | 福州高意通讯有限公司 | A F-P etalon type wavestrip switch |
| CN101971445A (en) * | 2008-02-05 | 2011-02-09 | 住友电工光电子器件创新株式会社 | Laser device and laser device control data |
-
2011
- 2011-04-14 CN CN 201110093687 patent/CN102162913A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1849733A (en) * | 2003-09-10 | 2006-10-18 | 英特尔公司 | Seeking and tracking control for locking to transmision peak for a tunable laser |
| CN1721887A (en) * | 2004-07-16 | 2006-01-18 | 亚洲光学股份有限公司 | CWDM light filter |
| CN201035181Y (en) * | 2007-04-11 | 2008-03-12 | 福州高意通讯有限公司 | A F-P etalon type wavestrip switch |
| CN101971445A (en) * | 2008-02-05 | 2011-02-09 | 住友电工光电子器件创新株式会社 | Laser device and laser device control data |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103676134A (en) * | 2012-08-31 | 2014-03-26 | 福州高意通讯有限公司 | Double-cavity etalon |
| CN110737113A (en) * | 2018-07-18 | 2020-01-31 | 福州高意通讯有限公司 | small-sized adjustable wavelength optical filter |
| CN110764174A (en) * | 2019-10-28 | 2020-02-07 | 中山大学 | Dielectric grating narrow-band filter and manufacturing method thereof |
| CN110764174B (en) * | 2019-10-28 | 2022-05-03 | 中山大学 | Dielectric grating narrow-band filter and manufacturing method thereof |
| CN113791473A (en) * | 2021-10-27 | 2021-12-14 | 福州高意光学有限公司 | Heat adjustable optical switch |
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Application publication date: 20110824 |