CN101446662A - Band-pass filter for long-period fiber gratings - Google Patents
Band-pass filter for long-period fiber gratings Download PDFInfo
- Publication number
- CN101446662A CN101446662A CNA2008103066132A CN200810306613A CN101446662A CN 101446662 A CN101446662 A CN 101446662A CN A2008103066132 A CNA2008103066132 A CN A2008103066132A CN 200810306613 A CN200810306613 A CN 200810306613A CN 101446662 A CN101446662 A CN 101446662A
- Authority
- CN
- China
- Prior art keywords
- long
- band
- pass filter
- optical fiber
- microflute
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention provides a band-pass filter for long-period fiber gratings. The band-pass filter for long-period fiber gratings comprises an optical fiber and an optical fiber to be connected. A microflute is formed on the end surface of the optical fiber and/or the optical fiber to be connected. The optical fiber and the optical fiber to be connected are in opposite joint. The microflute defines a FP chamber. The cross-sectional area of the microflute is smaller than that of the fiber core. Long-period fiber gratings are arranged at both ends of the FP chamber, respectively. The band-pass filter for long-period fiber gratings, as full-fiber device, has the advantages of good temperature stability and mechanical stability, high side-mode suppression ratio and repeated use of light outside the band pass.
Description
Technical field
The invention belongs to the optical fiber technology field, particularly relate to a kind of bandpass filter of long period fiber grating.
Background technology
The general cycle greater than 10 microns be exactly long period fiber grating, long period fiber grating is the transmission-type fiber grating, without male offspring to reflection, has good transmission spectrum characteristic, the energy of its fibre core basic mode is coupled in the cladding mode of transmission in the same way, thereby the loss that causes respective wavelength is a kind of desirable band resistance mode transmission passive filtering device, but does not also have band-pass filter for long-period fiber gratings at present.
Summary of the invention
Technical matters to be solved by this invention provides a kind of band-pass filter for long-period fiber gratings.
The technical scheme that technical solution problem of the present invention is adopted is: band-pass filter for long-period fiber gratings, comprise optical fiber and connect optical fiber, or/and connect the end face of optical fiber microflute is arranged at optical fiber, optical fiber and quilt are connect optical fiber and are linked together by butt joint, described microflute forms the FP chamber, the xsect of described microflute is manufactured with long period fiber grating less than the xsect of fibre core respectively at the two ends in described FP chamber.
The invention has the beneficial effects as follows: bandpass filter of the present invention is full optical fibre device, and temperature and mechanical stability are preferably arranged, the side mode suppression ratio height, and the logical outer light of band can reuse.
Description of drawings
Fig. 1 is the synoptic diagram of the step 1 of embodiments of the invention 1;
Fig. 2 is the synoptic diagram of the step 2 of embodiments of the invention 1;
Fig. 3 is the synoptic diagram of the step 3 of embodiments of the invention 1;
Fig. 4 is the synoptic diagram of the step 4 of embodiments of the invention 1;
Fig. 5 is the synoptic diagram of the step 5 of embodiments of the invention 1;
Fig. 6 is the synoptic diagram of the step 3 of embodiments of the invention 2;
Fig. 7 is the synoptic diagram of the step 4 of embodiments of the invention 2.
Embodiment
The present invention utilizes deep ultraviolet laser (157nm laser etc.) or femtosecond laser etc. to process the microflute of xsect less than fiber core on based on the single mode of quartz, polymkeric substance, jewel and photon crystal material etc. and multimode optical fiber end face, the microflute shape is cylindrical, the degree of depth of microflute is determined according to the chamber of wave filter is long, is generally less than 10 microns.Optical thin film at microflute bottom interior surface plating one deck high reflectance, usually plate multilayer dielectric film or metal film, electric arc welding outside microflute again, laser welding or directly knot is connect optical fiber (also can process microflute being connect on the end face of optical fiber), utilize carbon dioxide laser or ultraviolet laser to make two the same long period fiber grating of parameter respectively at the two ends in FP chamber again, make online adjustable bandpass filter of the present invention, above-mentioned two long period fiber grating parameters must be the same, could realize the coupling of light like this.First long period fiber grating is with the covering that couples light in certain wavelength coverage, and the remaining light of propagating at the fibre core film (being above-mentioned optical thin film) that is reflected reflects back, and the long period fiber grating of running into second identical parameters at the light of covering transmission just is coupled back in the fibre core.This bandpass filter is full optical fibre device, and temperature and mechanical stability are preferably arranged.The cycle of above-mentioned two long period fiber grating is determined according to the bandpass filter desired parameters.
Embodiment 1:
Step 1, utilize femtosecond laser on optical fiber 1 end face, to process the microflute 3 of xsect less than fiber core, as shown in Figure 1,
Step 3, in microflute 3, fill magneto-optical crystal material 5, as shown in Figure 3,
Step 5, at above-mentioned optical fiber 1 with connect on the optical fiber 2 with carbon dioxide laser and make two long period fiber grating 6, as shown in Figure 5, make band-pass filter for long-period fiber gratings of the present invention.
Embodiment 2:
Step 1, utilize deep ultraviolet laser on optical fiber 1 end face, to process the microflute 3 of xsect less than fiber core,
Step 3, connect optical fiber 2 by laser welding, as shown in Figure 6,
Claims (7)
- [claim 1] band-pass filter for long-period fiber gratings, comprise optical fiber (1) and connect optical fiber (2), it is characterized in that: or/and connect the end face of optical fiber (2) microflute (3) is arranged at optical fiber (1), optical fiber (1) and quilt are connect optical fiber (2) and are linked together by butt joint, described microflute (3) forms the FP chamber, the xsect of described microflute (3) is manufactured with long period fiber grating (6) less than the xsect of fibre core respectively at the two ends in described FP chamber.
- [claim 2] band-pass filter for long-period fiber gratings as claimed in claim 1 is characterized in that: the inside surface in described microflute (3) bottom is coated with the optical thin film (4) of high reflectance.
- [claim 3] band-pass filter for long-period fiber gratings as claimed in claim 2 is characterized in that: the optical thin film of described high reflectance (4) is multilayer dielectric film or metal film.
- [claim 4] band-pass filter for long-period fiber gratings as claimed in claim 1 is characterized in that: be filled with dielectric material in described microflute (3).
- [claim 5] band-pass filter for long-period fiber gratings as claimed in claim 4 is characterized in that: described dielectric material is electric light or magneto-optical crystal material (5).
- [claim 6] band-pass filter for long-period fiber gratings as claimed in claim 1 is characterized in that: long period fiber grating (6) parameter at two ends, described FP chamber is the same.
- [claim 7] band-pass filter for long-period fiber gratings as claimed in claim 1 is characterized in that: described microflute (3) is cylindrical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008103066132A CN101446662A (en) | 2008-12-29 | 2008-12-29 | Band-pass filter for long-period fiber gratings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008103066132A CN101446662A (en) | 2008-12-29 | 2008-12-29 | Band-pass filter for long-period fiber gratings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101446662A true CN101446662A (en) | 2009-06-03 |
Family
ID=40742428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008103066132A Pending CN101446662A (en) | 2008-12-29 | 2008-12-29 | Band-pass filter for long-period fiber gratings |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101446662A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101963683A (en) * | 2010-08-09 | 2011-02-02 | 电子科技大学 | Band-pass filtering method of mechanical adjustable pi-phase shift period structure and band-pass filter adopting same |
| CN104834057A (en) * | 2015-05-12 | 2015-08-12 | 浙江工业大学 | Long-period fiber grating band-pass and band-stop filter |
| CN110412683A (en) * | 2018-04-28 | 2019-11-05 | 福州高意光学有限公司 | A kind of production method and application of optical fiber structure |
| CN110673259A (en) * | 2019-10-08 | 2020-01-10 | 浙江科技学院 | Cascade chirp long period fiber grating band-pass filter |
-
2008
- 2008-12-29 CN CNA2008103066132A patent/CN101446662A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101963683A (en) * | 2010-08-09 | 2011-02-02 | 电子科技大学 | Band-pass filtering method of mechanical adjustable pi-phase shift period structure and band-pass filter adopting same |
| CN101963683B (en) * | 2010-08-09 | 2012-04-25 | 电子科技大学 | Band-pass filter of mechanical adjustable pi-phase shift period structure |
| CN104834057A (en) * | 2015-05-12 | 2015-08-12 | 浙江工业大学 | Long-period fiber grating band-pass and band-stop filter |
| CN104834057B (en) * | 2015-05-12 | 2018-04-20 | 浙江工业大学 | Long-period fiber grating bandpass and band-rejection filter |
| CN110412683A (en) * | 2018-04-28 | 2019-11-05 | 福州高意光学有限公司 | A kind of production method and application of optical fiber structure |
| CN110673259A (en) * | 2019-10-08 | 2020-01-10 | 浙江科技学院 | Cascade chirp long period fiber grating band-pass filter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103246014B (en) | Glass large-core optical fibers | |
| CN105098575A (en) | Narrow-band fiber laser for mixed medium microcavity full-optical tuning | |
| CN101446662A (en) | Band-pass filter for long-period fiber gratings | |
| CN207198385U (en) | A kind of fiber end face formula Echo Wall resonator based on microballoon | |
| CN109378687B (en) | Stimulated Brillouin scattering suppression method for optical fiber laser amplifier system | |
| CN107544115B (en) | Optical fiber end face type whispering gallery resonator based on microspheres | |
| CN102946045B (en) | Fiber laser pump coupler | |
| CN107046221A (en) | A kind of single-frequency narrow band fiber laser based on the high symmetrical microcavity of circularity three-dimensional rotation | |
| CN109143468B (en) | On-line tunable optical fiber internal integrated ultrasonic grating | |
| CN110568558A (en) | Echo wall resonator based on double-conical optical fiber coupling double microspheres | |
| CN112444914B (en) | D-type photonic crystal fiber tunable polarization filter based on gold film coating and manufacturing method | |
| CN108306166A (en) | A kind of tunable optical fiber laser based on special optical fiber peanut knot | |
| CN103259166B (en) | Continuous dual-purpose fiber laser based on radio frequency modulation long period grating modulation Q pulse | |
| CN107749557A (en) | The middle tunable IR Fiber-optic parameter oscillator of high-order mode signal injection | |
| CN101655578B (en) | Method for lowering insertion loss of optical fiber Fabry-Perot filter | |
| CN109814207A (en) | A kind of Echo Wall resonator of optical fiber side insertion microballoon | |
| US8442089B2 (en) | Laser device | |
| CN106772798B (en) | Reflection-type narrow band filter based on waveguide Bragg grating | |
| CN206524515U (en) | A kind of single-frequency narrow band fiber laser based on the high symmetrical microcavity of circularity three-dimensional rotation | |
| CN101783477B (en) | Filtering endoscope used for optical fiber laser and optical fiber laser | |
| CN209433064U (en) | A kind of Echo Wall resonator of optical fiber side insertion microballoon | |
| TWI646363B (en) | Device for coupling pump light into optical fiber and manufacturing method thereof | |
| CN103259169B (en) | Difference frequency terahertz wave optical fiber laser | |
| CN100495091C (en) | Leakage structure large mode field double-cladding single mode yb doped-optical fiber | |
| CN106384931A (en) | Swept laser based on optical fluid |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20090603 |