CN102169233A - Tunable light splitting and combing device and optical application system - Google Patents
Tunable light splitting and combing device and optical application system Download PDFInfo
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- CN102169233A CN102169233A CN 201110029965 CN201110029965A CN102169233A CN 102169233 A CN102169233 A CN 102169233A CN 201110029965 CN201110029965 CN 201110029965 CN 201110029965 A CN201110029965 A CN 201110029965A CN 102169233 A CN102169233 A CN 102169233A
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Abstract
The invention is suitable for the field of optical technology and provides a tunable light splitting and combing device and an optical application system. The tunable light splitting and combing device comprises a first prism pair and a second prism pair. The first prism pair is used for splitting a broadband spectrum into parallel light according to the spectrum distribution. The second prism pair comprises beam splitting components for splitting the parallel light into a plurality of sub-beams with different heights and changing the spectrum distribution of each sub-beam, and is used for combining the sub-beams with the same height into one beam for output. According to the invention, the broadband spectrum which has undergone dispersion is regulated to become the parallel light, the parallel light is then split into a plurality of sub-beams with different heights so that the sub-beams with the same height are combined into one beam for output, and the spectrum distribution of each sub-beam is regulated by the beam splitting components. Therefore, light splitting and light combining of two spectral wavebands with any wavelength of incident light as a boundary are realized and light splitting and light combining of wavebands in the middle and at the two sides of the incident spectrum are realized, so that light splitting and light combining are easy to be tuned.
Description
Technical field
The invention belongs to optical technical field, relate in particular to a kind of tunable beam split splicer and optical application system.
Background technology
The optical fiber super continuum source is equivalent to a broad band laser light source, and exportable spectral bandwidth is the high light of hundreds of to a nanometer more than thousand, has important use at aspects such as optical coherence imaging, spectroscopy.In some applications, the overall optical spectral limit that is not light source all needs, what need only is a wave band in the full spectrum, and remaining spectral band can produce adverse influence to it after entering system, therefore this part need be eliminated the spectral band that system has a negative impact; In other is used, the different-waveband composition of output spectrum has different purposes, therefore need one and continuous spectrum can be pressed the dipartite optical splitter of spectrum, what need especially is to carry out tunable beam split to output spectrum, to satisfy different user demands.It is current that maximum in the world the super continuum source manufacturer---NKT Photonics company has developed a kind of spectrum dispenser, but two parts spectrum of its output is fixed, cannot realize tunable beam split, therefore such optical splitter is difficult to satisfy the multi-usage application of tunable beam split.
In addition, need the light compositing of several spectral bands a branch ofly in some applications, use such as needing spectrum with several super continuum sources to close light in the demand to the ultra broadband super continuous spectrums; Need in some fiber laser pump light is coupled to the amplification that realizes seed laser in the seed laser light path.The beam split of current different wave length laser and close and only utilize light wavelength division multiplexing, light wavelength division multiplexing are mainly adopted and are drawn awl and two kinds of technology of plated film to make.But the wavelength division multiplexer that utilizes these two kinds of technology developments all only limits to the transmission of low power laser, and multiplexing and spectral bandwidth demultiplexing is tens nanometers or a few nanometer, be difficult to realize that optical range is fixed for the multiplexing and demultiplexing in broadband, particularly its minute, be difficult to realize the multi-usage application equally.
Summary of the invention
The purpose of the embodiment of the invention is to provide a kind of tunable beam split splicer, is intended to solve the problem that existing beam split splicer fails to realize tunable minute actinic light.
The embodiment of the invention is to realize like this, a kind of tunable beam split splicer, comprise broadband spectral is divided into by first prism of the directional light of spectral distribution right, described directional light is divided into the beamlet of multi beam differing heights and the beamlet that is used to change the branch tread assembly of each beamlet spectral distribution and will be in sustained height to be combined into second prism of a branch of light output right.
Another purpose of the embodiment of the invention is to provide the optical application system, and described optical application system comprises above-mentioned tunable beam split splicer.
Bandwidth spectrum adjust of the embodiment of the invention after to chromatic dispersion makes it become directional light, the beamlet that this directional light is divided into the multi beam differing heights, make the beamlet that is in sustained height be combined into a branch of light output, adjust the spectral distribution of each beamlet by minute tread assembly, both realized with any wavelength of incident light spectrum be boundary two spectral bands beam split and close light, realize the beam split of middle wave band of incident light spectrum and both sides wave band again and close light, be easy to tuning.
Description of drawings
Fig. 1 is the vertical view of the tunable beam split splicer that provides of the embodiment of the invention;
Fig. 2 is the side view of the tunable beam split splicer that provides of the embodiment of the invention;
Fig. 3 is the structural drawing of a kind of minute tread assembly providing of the embodiment of the invention;
Fig. 4 is the structural drawing that another kind that the embodiment of the invention provides divides tread assembly.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Bandwidth spectrum adjust of the embodiment of the invention after to chromatic dispersion makes it become directional light, the beamlet that this directional light is divided into the multi beam differing heights, make the beamlet that is in sustained height be combined into a branch of light output, adjust the spectral distribution of each beamlet by minute tread assembly, realized with any wavelength of incident light spectrum be boundary two spectral bands beam split and close light; Realize the beam split of middle wave band of incident light spectrum and both sides wave band again and close light, be easy to tuning.
The tunable beam split splicer that the embodiment of the invention provides comprise broadband spectral is divided into by first prism of the directional light of spectral distribution right, described directional light is divided into the beamlet of multi beam differing heights and the beamlet that is used to change the branch tread assembly of each beamlet spectral distribution and will be in sustained height to be combined into second prism of a branch of light output right.
The optical application system that the embodiment of the invention provides comprises above-mentioned tunable beam split splicer.
Below in conjunction with specific embodiment realization of the present invention is described in detail.
As shown in Figure 1, 2, this tunable beam split splicer comprise broadband spectral is divided into by first prism of the directional light of spectral distribution right, directional light is divided into the beamlet of multi beam differing heights and the beamlet that is used to change the branch tread assembly 2 of each beamlet spectral distribution and will be in sustained height to be combined into second prism of a branch of light output right.
Particularly, this tunable beam split splicer comprise first prism 11 that broadband spectral become disperse spectrum, with this disperse second prism 12 that spectrum changes into parallel spectrum, the 3rd prisms of placing with second prism, 12 symmetries 13 and the 4th prisms of placing with first prism, 11 symmetries 14.It is right that first prism 11 and second prism 12 are formed first prism, and it is right that the 3rd prism 13 and the 4th prism 14 are formed second prism; First prism pair is placed symmetry with second prism.First prism 11, second prism 12, the 3rd prism 13 and the 4th prism 14 are formed tetragonous mirror system.Each prism material is identical, and preferred high chromatic dispersion, low-loss material are beneficial to improve systemic resolution.Corresponding drift angle equates in each prism, closes light to carry out the reversible spectrum of chromatic dispersion beam split and light path.Drift angle by the design prism makes the broadband parallel beam for the treatment of beam split be projected to the prism surface with Brewster angle, prismatic decomposition exit surface plating broadband spectral anti-reflection film.
Two prisms near colimated light system 31 in the embodiment of the invention are that first prism 11 is identical with the 4th prism 14 sizes, but size is less, carries out first order beam split or closes light; Middle two prisms i.e. second prism 12 are identical with the 3rd prism 13 sizes, but size is bigger, carries out second level beam split or closes light.Divide tread assembly 2 will be divided into the beamlet of multi beam differing heights, thereby the 3rd prism 13 and the 4th prism 14 are thick than first prism 11 and second prism 12 by the directional light of spectral distribution.
In addition, optical fiber and colimated light system 31 thereof have washability, and what whether have representative is full optical fiber input and output and free space input and output.For ease of explanation, the 3rd prism 13 and the 4th prism 14 all can be divided into upper and lower two stacked prisms, can be divided into upper and lower two stacked prisms as the 3rd prism 13, and the 4th prism 14 can be divided into upper and lower two stacked prisms.
Usually, 11 pairs of broadband spectrals of first prism carry out the chromatic dispersion beam split, divide tread assembly 2 to receive the directional light of being exported by second prism 12, the 3rd prism 13 receives the multi beam beamlet that is divided into by minute tread assembly 2, and the beamlet that the 4th prism 14 will be in sustained height closes bundle output.
As shown in Figure 3, divide tread assembly 2 to constitute with the lower-layer reflecting mirror 22 parallel with this upper strata catoptron 21 by a upper strata catoptron 21; This lower-layer reflecting mirror is 22 less, can laterally move big, the general fixed placement of upper strata catoptron 21.Mobile lower-layer reflecting mirror 22, make above-mentioned directional light wherein the beamlet 41 of a side wave section be projeced into lower-layer reflecting mirror 22, the beamlet 41 of this side wave section reflexes to upper strata catoptron 21 by lower-layer reflecting mirror 22, reflex to the 3rd prism 13 by upper strata catoptron 21 again, the beamlet 42 of this directional light opposite side wave band is transmitted to the 3rd prism 13 along former direction; Beamlet through 21 reflections of upper strata catoptron is parallel to the beamlet of propagating along former direction, and is just highly different.Be projeced into the top of the 3rd prism 13 through the beamlet of upper strata catoptron 21 reflections, and be projeced into the bottom of the 3rd prism 13 along the beamlet that former direction is propagated.According to the light path principle of reversibility, export being combined into a branch of light through the beamlet of upper strata catoptron 21 reflections with second prism that first prism is placed symmetry, restraint light output by second prism to being combined into another, thereby above-mentioned directional light is divided into the two-beam output of differing heights along the beamlet that former direction is propagated.As long as regulate the position of lower-layer reflecting mirror 22, just can realize with any wavelength of incident light spectrum being the beam split of two spectral bands of boundary, if each light beam reverse transfer just can realize the light that closes of two bundle different-waveband light, realize tunable beam split and close light.
Follow horizontal mobile lower-layer reflecting mirror 22, make the beamlet of the middle wave band of above-mentioned directional light be projeced into lower-layer reflecting mirror 22, the beamlet of this centre wave band reflexes to upper strata catoptron 21 by lower-layer reflecting mirror 22, reflex to the 3rd prism 13 by upper strata catoptron 21 again, the beamlet of above-mentioned directional light both sides wave band is transmitted to the 3rd prism 13 along former direction; Beamlet through 21 reflections of upper strata catoptron is parallel to the beamlet of propagating along former direction, and is just highly different.Be projeced into the top of the 3rd prism 13 through the beamlet of upper strata catoptron 21 reflections, and be projeced into the bottom of the 3rd prism 13 along the beamlet that former direction is propagated.According to the light path principle of reversibility, export being combined into a branch of light through the beamlet of upper strata catoptron 21 reflections with second prism that first prism is placed symmetry, restraint light output by second prism to being combined into another, thereby above-mentioned directional light is divided into the two-beam output of differing heights along the beamlet that former direction is propagated.As long as regulate the position of lower-layer reflecting mirror 22, just can realize the beam split of middle wave band of incident light spectrum and both sides spectral band; If each light beam reverse transfer just can realize the light that closes of two bundle different-waveband light, realize tunable beam split and close light.But the spectral range of middle wave band is constant.
As one embodiment of the present of invention, divide tread assembly 2 to constitute by a upper strata catoptron 21 and a plurality of and this upper strata catoptron 21 parallel lower-layer reflecting mirror, each lower-layer reflecting mirror all can laterally move, and is provided with broad-adjustable slit between adjacent lower-layer reflecting mirror.
As shown in Figure 4, for ease of explanation, above-mentioned lower-layer reflecting mirror comprises second lower-layer reflecting mirror 24 that move relative to first lower-layer reflecting mirror 23 first lower-layer reflecting mirror 23 and lateral attitude, and this first lower- layer reflecting mirror 23 and 24 of second lower-layer reflecting mirror are established the slit 25 of variable-width.At first make in the middle of the directional light beamlet 26 of wave band pass slit 25 and be transmitted to the 3rd prism 13 along former direction; The beamlet 27 of directional light both sides wave band is projected to first lower-layer reflecting mirror 23 and second lower-layer reflecting mirror 24 respectively, the beamlet 27 of this both sides wave band reflexes to upper strata catoptron 21 by first lower-layer reflecting mirror 23 and second lower-layer reflecting mirror 24 respectively, reflexes to the 3rd prism 13 by upper strata catoptron 21 again; Beamlet through 21 reflections of upper strata catoptron is parallel to the beamlet of propagating along former direction.Two bundle beamlets through 21 reflections of upper strata catoptron are in sustained height, are exported being combined into a branch of light by second prism; Passing slit 25 is exported being combined into another bundle light by second prism along the beamlet of former direction propagation.
As long as regulate the position of first lower-layer reflecting mirror 23 and/or second lower-layer reflecting mirror 24, change the width of slit 25, then can realize the beam split of middle wave band of incident light spectrum and both sides spectral band; If each light beam reverse transfer just can realize the light that closes of two bundle different-waveband light, realize tunable beam split and close light.The spectral distribution of middle wave band and spectral range scalable change.
Hence one can see that, and lower-layer reflecting mirror and upper strata catoptron constitute one can carry out partial parallel light the mirror that lifts that vertical position lifts.Whole because of the adjustable positions of lower-layer reflecting mirror, realize tunable beam split and close light.Certainly, all available total reflection prism of above-mentioned catoptron replaces.
Bandwidth spectrum adjust of the embodiment of the invention after to chromatic dispersion makes it become directional light, the beamlet that this directional light is divided into the multi beam differing heights, make the beamlet that is in sustained height be combined into a branch of light output, adjust the spectral distribution of each beamlet by minute tread assembly, both realized with any wavelength of incident light spectrum be boundary two spectral bands beam split and close light, realize the beam split of middle wave band of incident light spectrum and both sides wave band again and close light, be easy to tuning.Simultaneously, broadband spectral, is beneficial to and reduces optical loss in first prism with brewster angle incidence.In addition, divide the upper strata catoptron of tread assembly and the angle of lower-layer reflecting mirror and surface level to be 45 °, be convenient to the upper and lower layer of lateral adjustments catoptron.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. tunable beam split splicer, it is characterized in that, described tunable beam split splicer comprise broadband spectral is divided into by first prism of the directional light of spectral distribution right, described directional light is divided into the beamlet of multi beam differing heights and the beamlet that is used to change the branch tread assembly of each beamlet spectral distribution and will be in sustained height to be combined into second prism of a branch of light output right.
2. tunable beam split splicer as claimed in claim 1, it is characterized in that, described first prism is to comprising first prism and second prism, and described first prism is to described broadband spectral chromatic dispersion beam split, and tread assembly received the directional light by described second prism output in described minute; Described second prism is to comprising the 3rd prism and the 4th prism, and described the 3rd prism receives the multi beam beamlet that is divided into by described minute tread assembly, and the beamlet that described the 4th prism will be in sustained height is combined into a branch of light output; Described first prism pair is placed symmetry with second prism.
3. tunable beam split splicer as claimed in claim 2, it is characterized in that, tread assembly was made of with the lower-layer reflecting mirror parallel with described upper strata catoptron a upper strata catoptron in described minute, make described directional light wherein the beamlet of a side wave section be projeced into described lower-layer reflecting mirror, the beamlet of this side wave section reflexes to described upper strata catoptron by described lower-layer reflecting mirror, again by described upper strata mirror reflects to described the 3rd prism; The beamlet of described directional light opposite side wave band is transmitted to the 3rd prism along former direction; Beamlet through described upper strata mirror reflects is parallel to the beamlet of propagating along former direction.
4. tunable beam split splicer as claimed in claim 2, it is characterized in that, tread assembly was made of with the lower-layer reflecting mirror parallel with described upper strata catoptron a upper strata catoptron in described minute, make the beamlet of the middle wave band of described directional light be projected to described lower-layer reflecting mirror, the beamlet of this centre wave band reflexes to described upper strata catoptron by described lower-layer reflecting mirror, again by described upper strata mirror reflects to described the 3rd prism, the beamlet of described directional light both sides wave band is transmitted to described the 3rd prism along former direction; Beamlet through described upper strata mirror reflects is parallel to the beamlet of propagating along former direction.
5. tunable beam split splicer as claimed in claim 1 or 2 is characterized in that, tread assembly was made of a upper strata catoptron and a plurality of and described upper strata parallel lower-layer reflecting mirror of catoptron in described minute, established broad-adjustable slit between adjacent lower-layer reflecting mirror.
6. tunable beam split splicer as claimed in claim 5, it is characterized in that, described lower-layer reflecting mirror comprises first lower-layer reflecting mirror and second lower-layer reflecting mirror that laterally moves relative to described first lower-layer reflecting mirror, establishes the slit of variable-width between described first lower-layer reflecting mirror and second lower-layer reflecting mirror; Make in the middle of the described directional light beamlet of wave band pass described slit and be transmitted to described the 3rd prism along former direction; The beamlet of described directional light both sides wave band is projected to described first lower-layer reflecting mirror and second lower-layer reflecting mirror respectively, the beamlet of this both sides wave band reflexes to described upper strata catoptron by described first lower-layer reflecting mirror and second lower-layer reflecting mirror respectively, again by described upper strata mirror reflects to described the 3rd prism; Beamlet through described upper strata mirror reflects is parallel to the beamlet of propagating along former direction.
7. as claim 2,3,4 or 6 described tunable beam split splicers, it is characterized in that, described broadband spectral with brewster angle incidence in described first prism.
8. as claim 3,4 or 6 described tunable beam split splicers, it is characterized in that the angle of described upper strata catoptron and lower-layer reflecting mirror and surface level is 45 °.
9. as claim 2,3,4 or 6 described tunable beam split splicers, it is characterized in that described the 3rd prism and the 4th prism constitute by upper and lower two stacked prisms.
10. an optical application system is characterized in that, described optical application system comprises as each described tunable beam split splicer in the claim 1～9.
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| CN201110029965.XA CN102169233B (en) | 2011-01-26 | 2011-01-26 | Tunable light splitting and combing device and optical application system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104317064A (en) * | 2014-09-24 | 2015-01-28 | 福建福晶科技股份有限公司 | Broadband achromatic compensator |
| CN104344889A (en) * | 2014-10-23 | 2015-02-11 | 上海卫星工程研究所 | Ultraviolet non-imaging prism spectrometer optical system |
| CN104749785A (en) * | 2015-04-14 | 2015-07-01 | 天津七一二通信广播有限公司 | High-brightness high-efficiency white laser light source implementation method |
| CN106950707A (en) * | 2017-05-25 | 2017-07-14 | 力合科技（湖南）股份有限公司 | A kind of light beam coupling device |
| WO2020221234A1 (en) * | 2019-04-28 | 2020-11-05 | 北京航空航天大学 | Tunable light source and endoscope system |
| CN112413421A (en) * | 2020-10-10 | 2021-02-26 | 北京工业大学 | Laser lighting device based on white light super-continuum spectrum laser |
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| CN112413421A (en) * | 2020-10-10 | 2021-02-26 | 北京工业大学 | Laser lighting device based on white light super-continuum spectrum laser |
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|---|---|
| CN102169233B (en) | 2014-07-23 |
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