CN102323668A - Tunable optical filter integrated with angle sensor - Google Patents
Tunable optical filter integrated with angle sensor Download PDFInfo
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- CN102323668A CN102323668A CN201110269625A CN201110269625A CN102323668A CN 102323668 A CN102323668 A CN 102323668A CN 201110269625 A CN201110269625 A CN 201110269625A CN 201110269625 A CN201110269625 A CN 201110269625A CN 102323668 A CN102323668 A CN 102323668A
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- angle sensor
- angular transducer
- catoptron
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Abstract
The invention provides a tunable optical filter integrated with an angle sensor, which at least comprises an optical fiber input/output device, an optical collimator, an optical grating and a rotating reflective mirror. The tunable optical filter is characterized by also comprising the angle sensor arranged along with the rotating shaft of the rotating reflective mirror, a multi-wavelength light beam output by the optical fiber input/output device is converted by the optical collimator into a parallel light beam, the parallel light beam is transmitted into the optical grating to diffuse light components with different wavelengths according to different diffraction angles, diffracted light at different angles are projected to the rotating reflective mirror, and the diffracted light of any wavelength can be selected to return along an original path when the rotating reflective mirror is rotated and then output by the optical fiber input/output device; and the angle sensor is used for detecting the rotating angle of the rotating reflective mirror to obtain the wavelength of optical signals corresponding to the rotating angle of the rotating reflective mirror.
Description
Technical field
The present invention relates to a kind of adjustable light wave-filter, in particular to a kind of tunable optic filter of integrated angle sensor.
Background technology
Along with the development of information age, people to the transmission speed of the capacity of Fiber Optical Communication System and Fiber Optical Communication System require increasingly high.In Fiber Optical Communication System and sensing network, need adjustable light wave-filter that the wavelength that optical fiber transmits light signal is regulated, wavelength optical signals is transmitted in different channels.At present, tunable optic filter is of a great variety, and structure is various.For example: grating tunable wave filter, acousto-optic tunable filter or the like.Grating filter is that the light component of different wave length has different angle of diffraction when utilizing incident light to incide grating surface, thereby the different wave length light signal separately, realizes the tunable filtering function.Acousto-optic tunable filter is the light-splitting device of processing through the acoustooptic diffraction principle, after incident illumination is mapped to this grating, will produce Bragg diffraction, changes the frequency of high-frequency driving signal, can change the diffraction light wavelength, and then reach the purpose of beam split.Obviously, general adjustable light wave-filter can only be realized the tunable filtering function, and the wavelength of selected light signal is unknown.Therefore, in the existing fiber sensor-based system, we need demarcate wavelength by external etalon in system, and cost is expensive, complex structure, thus limited practical application.
Summary of the invention
In view of above-mentioned, to the deficiency of prior art, the present invention proposes a kind of adjustable light wave-filter of integrated angle sensor, on the basis of existing adjustable light wave-filter, increases the function of a wavelength feedback.
The adjustable light wave-filter of a kind of integrated angle sensor that the present invention proposes; At least comprise optical fiber input-output unit, optical collimator, grating, rotatable catoptron; It is characterized in that: comprise also and the angular transducer of rotatable catoptron phase configuration that the multi-wavelength light beam from the output of optical fiber input-output unit converts parallel beam into through optical collimator; Thereby parallel beam is injected grating the light component of the different wave length difference by its angle of diffraction is spread out; The diffraction light of different angles projects rotatable catoptron then, and the rotatable catoptron of rotation makes the diffraction light of different wave length return by former road, exports from the optical fiber input-output unit; Angular transducer detects the anglec of rotation of rotatable catoptron, so obtain the rotatable catoptron anglec of rotation the wavelength of corresponding light signal.
Preferably, said angular transducer is installed on the rotation axis of rotatable catoptron.
Preferably, said optical fiber input-output unit is a kind of in optical circulator, twin-core contact pin, the coupling mechanism.
Preferably, said rotatable catoptron is made up of Mems catoptron or motor-driven reflecting optics.
Preferably, said angular transducer is a kind of in optical angle sensor, capacitance type angle sensor, inductance type angular transducer, grating angular transducer, the coding type angular transducer.
The contrast prior art; Beneficial effect of the present invention: the tunable optic filter of a kind of integrated angle sensor that the present invention proposes; Grating arrives the different angles direction to the optical diffraction of different wave length; Rotate catoptron and can select wavelength optical signals, angular transducer can record the angle that catoptron rotates simultaneously, and then obtains the wavelength of selected light wave.In the existing fiber sensing system, general tunable optic filter does not possess the function of measuring optical wavelength, need in system, demarcate wavelength by external etalon.The present invention can save this step of demarcation wavelength, has reduced cost.In addition, this invention also has simple in structure small and exquisite, and light path is convenient regulates, and is fit to more produce in batches, can be widely used in optical fiber communication and the optical fiber sensing system.
Description of drawings
Fig. 1 is the index path of first embodiment of the adjustable light wave-filter of integrated angle sensor of the present invention;
Fig. 2 is the index path of second embodiment of the adjustable light wave-filter of integrated angle sensor of the present invention;
Fig. 3 is rotatable catoptron of the present invention and angular transducer Facad structure synoptic diagram;
Fig. 4 is rotatable catoptron of the present invention and angular transducer side structure synoptic diagram.
Embodiment
Main thought of the present invention is that angular transducer can be experienced tested angle and convert usable output signal to, so the angle of may observe catoptron rotation obtains corresponding optical wavelength.
Combine accompanying drawing that the present invention is done further describes at present:
Consult accompanying drawing 1; Among first embodiment of the tunable optic filter of this integrated angle sensor; Comprise optical circulator 1-1, Transmission Fibers 1-2, optical collimator 2, grating 3, rotatable catoptron 4, angular transducer 5; The multi-wavelength light beam gets into from the first port A of optical circulator 1-1, converts on the plane that parallel beam is radiated at the grating 3 that becomes 90 °-θ (θ is the bragg angle of grating) with the optical collimator optical axis through Transmission Fibers 1-2, optical collimator 2 after the second port B output, and parallel beam is injected grating 3; Chromatic dispersion takes place in the light component of different wave length because of angle of diffraction is different; Rotatable catoptron 4 selects the light signal original optical path of arbitrary wavelength to return with certain rotational angle, pass through grating 3 secondary diffraction, chromatic dispersion again after, get back to the second port B of light annular device 1-1 through optical collimator; Final the 3rd port C output that realizes the light signal of selected wavelength from circulator 1-1, the output beam of input beam and tunable optic filter separately.The angular transducer 5 with its rotating shaft phase configuration that is positioned under the rotatable catoptron 4 comprises an angular transducer optical transmitting set, an angular transducer receiver.Because the angle of rotating during the light wave of rotatable catoptron emission different wave length is different; It is different to be close to the light signal energy that angular transducer transmitter that the angular transducer receiver of mirror bottom surface receives sends; Corresponding to the different catoptron anglecs of rotation, and then calculate the wavelength of light signal.
In the present embodiment; Described input optical fibre and output optical fibre are made up of optical circulator 1-1 and Transmission Fibers 1-2; As the optical fiber input media, the second port B to the, the three port C of optical circulator 1-1 are as the optical fiber output unit to the second port B and Transmission Fibers 1-2 for the first port A of optical circulator 1-1.
In the present embodiment, rotatable catoptron 4 is made up of the Mems catoptron;
In the present embodiment, angular transducer 5 is photoelectrical position sensors.
In the present embodiment; Described input optical fibre and output optical fibre are made up of optical circulator 1-1 and Transmission Fibers 1-2; As the optical fiber input media, the second port B to the, the three port C of optical circulator 1-1 are as the optical fiber output unit to the second port B and Transmission Fibers 1-2 for the first port A of optical circulator 1-1.
In the present embodiment, rotatable catoptron 4 is made up of motor-driven catoptron;
In the present embodiment, angular transducer 5 is coding type digital sensors.
Diffraction grating for the grating constant period has grating equation:
mλ＝Λ(sinθ
i+sinθ
D)
In the formula, m is a diffraction progression, and λ is a light signal centre wavelength, and ∧ is the grating cycle, θ
iBe light signal incident angle, θ
DBe light signal m order diffraction diffraction of light angle.
Can know by above-mentioned formula, for fixing incident angle, the optical wavelength that different angle of diffraction is corresponding different.
Therefore, diffraction grating has the scattered character of the light wave of different wave length, can be described as angular dispersion.Local derviation is asked on the grating equation both sides, is obtained the angular dispersion equation:
This shows that rotate catoptron the former road of light component of different wave length is returned, i.e. the angle of catoptron rotation is corresponding one by one with the wavelength of light component.Under the situation that angle change amount can be observed, can be regarded as out the change amount of wavelength, and then obtain optical wavelength.
On the basis of above-mentioned theory knowledge, the adjustable light wave-filter of a kind of integrated angle sensor that the present invention proposes utilizes angular transducer to predict the angle of rotatable catoptron rotation, calculates the wavelength of selected light wave, thereby realizes the function of wavelength feedback.
Above content is to combine concrete embodiment to the further explain that the present invention did, and can not assert that practical implementation of the present invention is confined to these explanations.For the those of ordinary skill of technical field under the present invention, under the prerequisite that does not break away from the present invention's design, can also make some simple deduction or replace, all should be regarded as belonging to protection scope of the present invention.
Claims (5)
1. the adjustable light wave-filter of an integrated angle sensor; At least comprise optical fiber input-output unit, optical collimator, grating, rotatable catoptron; It is characterized in that: comprise also and the angular transducer of rotatable catoptron phase configuration that the multi-wavelength light beam from the output of optical fiber input-output unit converts parallel beam into through optical collimator; Thereby parallel beam is injected grating the light component of the different wave length difference by its angle of diffraction is spread out; The diffraction light of different angles projects rotatable catoptron then, and the rotatable catoptron of rotation makes the diffraction light of different wave length return by former road, exports from the optical fiber input-output unit; Angular transducer detects the anglec of rotation of rotatable catoptron, so obtain the rotatable catoptron anglec of rotation the wavelength of corresponding light signal.
2. the adjustable light wave-filter of integrated angle sensor as claimed in claim 1 is characterized in that: said angular transducer is installed on the rotation axis of rotatable catoptron.
3. the adjustable light wave-filter of integrated angle sensor as claimed in claim 1 is characterized in that: said optical fiber input-output unit is a kind of in optical circulator, twin-core contact pin, the coupling mechanism.
4. the adjustable light wave-filter of a kind of integrated angle sensor as claimed in claim 1, it is characterized in that: said rotatable catoptron is made up of Mems catoptron or motor-driven reflecting optics.
5. like the adjustable light wave-filter of claim 1 or 2 or 3 or 4 described a kind of integrated angle sensors, it is characterized in that: said angular transducer is a kind of in optical angle sensor, capacitance type angle sensor, inductance type angular transducer, grating angular transducer, the coding type angular transducer.
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| CN201110269625A CN102323668A (en) | 2011-09-13 | 2011-09-13 | Tunable optical filter integrated with angle sensor |
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| CN201110269625A CN102323668A (en) | 2011-09-13 | 2011-09-13 | Tunable optical filter integrated with angle sensor |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103364879A (en) * | 2012-03-30 | 2013-10-23 | 福州高意通讯有限公司 | A flat-top optical filter with adjustable bandwidth |
| CN103682967A (en) * | 2012-12-28 | 2014-03-26 | 清华大学 | Addressing pump capable of achieving amplification of variable-angle incident laser |
| CN103837936A (en) * | 2014-03-13 | 2014-06-04 | 上海理工大学 | Optical band-pass and notching filter with adjustable bandwidth and central wavelength |
| CN103869419A (en) * | 2014-03-31 | 2014-06-18 | 武汉光迅科技股份有限公司 | Adjustable-reception optical filter applied to TWDM-PON |
| CN103901609A (en) * | 2014-03-26 | 2014-07-02 | 重庆大学 | Movable MEMS large turning angle blazed grating light modulator based on double-layer comb drive |
| CN103969745A (en) * | 2013-01-30 | 2014-08-06 | 福州高意通讯有限公司 | Bandwidth-adjustable flat-top optical filter based on DLP |
| CN103969746A (en) * | 2013-01-30 | 2014-08-06 | 福州高意通讯有限公司 | Optical channel monitor based on DLP |
| CN106019488A (en) * | 2016-08-16 | 2016-10-12 | 武汉光迅科技股份有限公司 | Bandwidth adjustable optical filter assembly |
| CN109683307A (en) * | 2018-12-28 | 2019-04-26 | 中国科学院深圳先进技术研究院 | A kind of tuning filtering apparatus and tuning filtering method based on DMD |
| CN111811548A (en) * | 2020-07-20 | 2020-10-23 | 中国科学院长春光学精密机械与物理研究所 | Light source adjusting device of reflective image photoelectric encoder |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103364879A (en) * | 2012-03-30 | 2013-10-23 | 福州高意通讯有限公司 | A flat-top optical filter with adjustable bandwidth |
| CN103682967A (en) * | 2012-12-28 | 2014-03-26 | 清华大学 | Addressing pump capable of achieving amplification of variable-angle incident laser |
| CN103969745A (en) * | 2013-01-30 | 2014-08-06 | 福州高意通讯有限公司 | Bandwidth-adjustable flat-top optical filter based on DLP |
| CN103969746A (en) * | 2013-01-30 | 2014-08-06 | 福州高意通讯有限公司 | Optical channel monitor based on DLP |
| CN103837936A (en) * | 2014-03-13 | 2014-06-04 | 上海理工大学 | Optical band-pass and notching filter with adjustable bandwidth and central wavelength |
| CN103837936B (en) * | 2014-03-13 | 2015-11-18 | 上海理工大学 | The optical band pass that a kind of bandwidth sum centre wavelength is adjustable and notch filter |
| CN103901609B (en) * | 2014-03-26 | 2016-05-18 | 重庆大学 | The MEMS movable blazed grating optical modulator driving based on double-deck broach |
| CN103901609A (en) * | 2014-03-26 | 2014-07-02 | 重庆大学 | Movable MEMS large turning angle blazed grating light modulator based on double-layer comb drive |
| CN103869419A (en) * | 2014-03-31 | 2014-06-18 | 武汉光迅科技股份有限公司 | Adjustable-reception optical filter applied to TWDM-PON |
| CN106019488A (en) * | 2016-08-16 | 2016-10-12 | 武汉光迅科技股份有限公司 | Bandwidth adjustable optical filter assembly |
| CN106019488B (en) * | 2016-08-16 | 2019-05-10 | 武汉光迅科技股份有限公司 | A kind of bandwidth tunable optical filter component |
| CN109683307A (en) * | 2018-12-28 | 2019-04-26 | 中国科学院深圳先进技术研究院 | A kind of tuning filtering apparatus and tuning filtering method based on DMD |
| CN111811548A (en) * | 2020-07-20 | 2020-10-23 | 中国科学院长春光学精密机械与物理研究所 | Light source adjusting device of reflective image photoelectric encoder |
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Application publication date: 20120118 |