CN206611012U - A kind of tunable laser - Google Patents
A kind of tunable laser Download PDFInfo
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- CN206611012U CN206611012U CN201720281137.8U CN201720281137U CN206611012U CN 206611012 U CN206611012 U CN 206611012U CN 201720281137 U CN201720281137 U CN 201720281137U CN 206611012 U CN206611012 U CN 206611012U
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- hysteroscope
- tunable laser
- field lens
- etalons
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Abstract
The utility model discloses a kind of tunable laser, it includes the first hysteroscope sequentially set along paths direction, gain media, reflecting system, F P etalons, field lens, second hysteroscope, wherein, excited by the incident light beam of the first hysteroscope by gain media, by the deflection angle for adjusting reflecting system, the light beam that gain media is excited is incided on F P etalons at different angles, F P etalon transmissions go out the transmitted light of the different wave length corresponding with different incidence angles, described transmitted light is incided in the second hysteroscope after field lens is assembled and is reflected back in gain media, and exported from the first hysteroscope, it is achieved thereby that the wavelength selection function of angle tuning, the technical solution of the utility model is reasonable in design, it is simple in construction, make simple, it is with low cost, incident angle regulation is convenient, tunable effect is good.
Description
Technical field
The utility model is related to laser technology field, especially a kind of tunable laser.
Background technology
Tunable laser is the laser device that output may be selected in a kind of wavelength, because its Output of laser wavelength can be certain
In the range of be tuned, have important application in fields such as spectroscopy, photochemistry, medical science, biology, information processing and communications.
At present, existing tunable laser mainly by Mach-Zehnder mode filters, fiber grating mode filter,
Acousto-optic mode filter and F-P mode filters etc. realize tunable wave length；Because F-P mode filters have many advantages, for example
Insertion loss is low, and tuned speed is fast, and tunable range is wide, and fineness is high, and flexible structure can make different structure various to meet
The demand of free spectral range, if can be by it using in tuned laser, then on the one hand will reduce cost, the opposing party
Face also reduces the manufacture difficulty of regulation laser, and current F-P mode filters are main using the tuning of chamber length and refractive index tuning
Two schemes, present invention employs angle tuning scheme, i.e., realize wavelength selection function by the change of incidence angle.
The content of the invention
The purpose of this utility model is in view of the shortcomings of the prior art there is provided one kind is reasonable in design, simple in construction, makes
Simply, with low cost, incident angle adjusts easily tunable laser.
In order to realize above-mentioned technical purpose, the technical solution of the utility model is：
A kind of tunable laser, its first hysteroscope for including sequentially setting along paths direction, gain media, reflection
System, F-P etalons, field lens, the second hysteroscope, wherein, excited by the incident light beam of the first hysteroscope by gain media, by adjusting
The deflection angle of whole reflecting system, the light beam that gain media is excited is incided on F-P etalons at different angles, F-P marks
Quasi- tool transmits the transmitted light of the different wave length corresponding with different incidence angles, and described transmitted light is incident after field lens is assembled
On to the second hysteroscope and it is reflected back in gain media, and is exported from the first hysteroscope.
Further, as another embodiment of the present utility model, provided with negative between described field lens and the second hysteroscope
Lens.
Further, as another embodiment of the present utility model, provided with just between described field lens and the second hysteroscope
Lens.
Further, described reflecting system can adjust one-dimensional or two dimension angular.
Further, described reflecting system is that MEMS mirror or motor-driven reflecting optics are constituted.
Further, the Free Spectral Range of described F-P etalons is more than the wave-length coverage of incident light.
Further, the shaft centre line of described field lens is overlapped with the inflexion point of reflecting system.
Further, described field lens is spherical mirror, aspherical mirror or cylindrical mirror.
Further, the second described hysteroscope is coated with the high-reflecting film of operation wavelength.
Further, the first described hysteroscope is outgoing mirror, and the first described hysteroscope is coated with the reflectance coating of operation wavelength.
Using above-mentioned technical scheme, the beneficial effects of the utility model are：By the deflection angle for adjusting reflecting system
Change the incident angle for the light that the gain media is excited so that F-P etalon transmissions go out corresponding with different incidence angles different
Transmitted light can all be focused in the second hysteroscope and reflected by the transmitted light of wavelength, field lens, realize wavelength selection function, and this practicality is new
The Technical Design of type is rationally, simple in construction, makes simple, and with low cost, incident angle adjusts convenient, tunable effect
It is good.
Brief description of the drawings
The utility model is further elaborated with reference to the accompanying drawings and detailed description：
Fig. 1 is the structural representation of embodiment 1 of tunable laser of the present invention；
Fig. 2 is the structural representation of embodiment 2 of tunable laser of the present invention；
Fig. 3 is the structural representation of embodiment 3 of tunable laser of the present invention.
Embodiment
A kind of tunable laser, its first hysteroscope for including sequentially setting along paths direction, gain media, reflection
System, F-P etalons, field lens, the second hysteroscope, wherein, excited by the incident light beam of the first hysteroscope by gain media, by adjusting
The deflection angle of whole reflecting system, the light beam that gain media is excited is incided on F-P etalons at different angles, F-P marks
Quasi- tool transmits the transmitted light of the different wave length corresponding with different incidence angles, and described transmitted light is incident after field lens is assembled
On to the second hysteroscope and it is reflected back in gain media, and is exported from the first hysteroscope.
Further, as another embodiment of the present utility model, provided with negative between described field lens and the second hysteroscope
Lens.
Further, as another embodiment of the present utility model, provided with just between described field lens and the second hysteroscope
Lens.
Further, described reflecting system can adjust one-dimensional or two dimension angular.
Further, described reflecting system is that MEMS mirror or motor-driven reflecting optics are constituted.
Further, the Free Spectral Range of described F-P etalons is more than the wave-length coverage of incident light.
Further, the shaft centre line of described field lens is overlapped with the inflexion point of reflecting system.
Further, described field lens is spherical mirror, aspherical mirror or cylindrical mirror.
Further, the second described hysteroscope is coated with the high-reflecting film of operation wavelength.
Further, the first described hysteroscope is outgoing mirror, and the first described hysteroscope is coated with the reflectance coating of operation wavelength.
The utility model scheme changes entering for the light that the gain media is excited by adjusting the deflection angle of reflecting system
Firing angle degree so that F-P etalon transmissions go out the transmitted light of different wave length corresponding with different incidence angles, field lens can be by transmitted light all
Focus in the second hysteroscope and reflect, realize wavelength selection function, the technical solution of the utility model is reasonable in design, structure letter
It is single, make simple, with low cost, incident angle regulation is convenient, and tunable effect is good.
Embodiment 1
As shown in figure 1, the utility model tunable laser, including the first hysteroscope 101, gain media 102, reflecting system
103rd, F-P etalons 104, field lens 105, the second hysteroscope 106.
Described gain media 102 can excitation wavelength be λ1, λ2... ..., λkThe light beam of (wherein, k is integer), passes through
The light beam excited is reflexed on F-P etalons 104 by described reflecting system 103, described by being fine-tuned by direction as shown
The angle of reflecting system 103 so that incidence angle θ of the light beam on the F-P etalons 104iMeet following condition：
2nl cosθi=N λi
In formula, n and l are respectively the cavity refractive index and cavity thickness of F-P etalons 104, and N is integer, i=1,
2 ... ..., k.
It can be seen from the characteristic of F-P etalons, in the incidence angle θ of some determinationiUnder, corresponding wavelength is λiLight will transmit through
The F-P etalons 104, because the Free Spectral Range of the F-P etalons 104 is more than the wave-length coverage of incident light, so
The light of its commplementary wave length will be filtered out, it is necessary to transmit other wavelength XsjWhen, institute is realized by the angle for adjusting the reflecting system 103
It is θ to state incidence angle on F-P etalons 104j.
Wavelength is λiLight incide on field lens 105, back focal plane and the reflection of the second hysteroscope 106 due to field lens 105
Face is overlapped, so wavelength is λiLight be focused onto in the second hysteroscope 106, similarly, due to field lens 105 central shaft with reflection be
The inflexion point of system 103 is overlapped, and wavelength is λ1, λ2... ..., λkAlthough light transmission angle it is all different, all can be by field lens 105
Focus in the second hysteroscope 106.
According to light path principle, reflected light can be with backtracking to the gain media 102, and from the first hysteroscope 101
Upper output, it is achieved thereby that the humorous wavelength selection function of adjustable angle.
Embodiment 2
As shown in Fig. 2 the utility model tunable laser, including the first hysteroscope 201, gain media 202, reflecting system
203rd, F-P etalons 204, field lens 205, the hysteroscope 207 of negative lens 206 and second.
The gain media 202 can excitation wavelength be λ1, λ2... ..., λkThe light beam of (wherein, k is integer), is excited
Light beam reflexed to by reflecting system 203 on F-P etalons 104, by the angle that reflecting system 203 is fine-tuned by direction as shown
Degree so that incidence angle θ of the light beam on F-P etalons 204iMeet following condition：
2nl cosθi=N λi
In formula, n and l are respectively the cavity refractive index and cavity thickness of the F-P etalons 204, and N is integer, i=1,
2 ... ..., k.
It can be seen from the characteristic of F-P etalons, in the incidence angle θ of some determinationiUnder, corresponding wavelength is λiLight will transmit through
F-P etalons 204, because the Free Spectral Range of F-P etalons 204 is more than the wave-length coverage of incident light, so its commplementary wave length
Light will be filtered out.Need to transmit other wavelength XsjWhen, realize the F-P etalons by adjusting the angle of reflecting system 203
Incidence angle is θ on 204j.
Wavelength is λiLight incide on the field lens 205 after be focused onto on the back focal plane of the field lens 205, due to
The back focal plane of field lens 205 is overlapped with the back focal plane of negative lens 206, so wavelength is λiLight be collimated and parallel incide
In two hysteroscopes 207, similarly, because the central shaft of field lens 205 is overlapped with the inflexion point of reflecting system 203, wavelength is λ1,
λ2... ..., λkAlthough light transmission angle it is all different, can all be collimated by field lens 205 and negative lens 206 and parallel incide the
In two hysteroscopes 207.
According to light path principle, reflected light can be and defeated from the first hysteroscope 201 with backtracking to gain media 202
Go out, it is achieved thereby that the humorous wavelength selection function of adjustable angle.
Embodiment 3
As shown in figure 3, the utility model tunable laser, including the first hysteroscope 301, gain media 302, reflecting system
303rd, F-P etalons 304, field lens 305, the hysteroscope 307 of positive lens 306 and second.
The gain media 302 can excitation wavelength be λ1, λ2... ..., λkThe light beam of (wherein, k is integer), is excited
Light beam reflexed to by reflecting system 303 on F-P etalons 304, by the angle that reflecting system 303 is fine-tuned by direction as shown
Degree so that incidence angle θ of the light beam on the F-P etalons 304iMeet following condition：
2nl cosθi=N λi
In formula, n and l are respectively the cavity refractive index and cavity thickness of the F-P etalons 304, and N is integer, i=1,
2 ... ..., k.
It can be seen from the characteristic of F-P etalons, in the incidence angle θ of some determinationiUnder, corresponding wavelength is λiLight will transmit through
F-P etalons 304, because the Free Spectral Range of F-P etalons 304 is more than the wave-length coverage of incident light, so its commplementary wave length
Light will be filtered out, it is necessary to transmit other wavelength XsjWhen, realize the F-P etalons by adjusting the angle of reflecting system 303
Incidence angle is θ on 304j.
Wavelength is λiLight incide on the field lens 305 after be focused onto on the back focal plane of the field lens 305, due to
The back focal plane of the field lens 305 is overlapped with the front focal plane of positive lens 306, so wavelength is λiLight be collimated parallel incidence
Onto second hysteroscope 307, similarly, because the central shaft of field lens 305 is overlapped with the inflexion point of reflecting system 303, wavelength is
λ1, λ2... ..., λkAlthough light transmission angle it is all different, all parallel incide with positive lens 306 can be collimated by field lens 305
In second hysteroscope 307.
According to light path principle, reflected light can be and defeated from the first hysteroscope 301 with backtracking to gain media 302
Go out, it is achieved thereby that the humorous wavelength selection function of adjustable angle.
Embodiment of the present utility model is the foregoing described, it will be appreciated by those of skill in the art that this is only
Be for example, those skilled in the art is on the premise of without departing substantially from principle of the present utility model and essence, can be to this reality
The mode of applying makes various changes or modifications, but these changes and modification each fall within protection domain of the present utility model.
Claims (10)
1. a kind of tunable laser, it is characterised in that：It includes the first hysteroscope, the gain sequentially set along paths direction
Medium, reflecting system, F-P etalons, field lens, the second hysteroscope, wherein, swashed by the incident light beam of the first hysteroscope by gain media
Hair, by adjusting the deflection angle of reflecting system, the light beam that gain media is excited incides F-P etalons at different angles
On, F-P etalon transmissions go out the transmitted light of the different wave length corresponding with different incidence angles, and described transmitted light is poly- by field lens
Incide in the second hysteroscope and be reflected back in gain media after collection, and exported from the first hysteroscope.
2. a kind of tunable laser according to claim 1, it is characterised in that：Between described field lens and the second hysteroscope
Provided with negative lens.
3. a kind of tunable laser according to claim 1, it is characterised in that：Between described field lens and the second hysteroscope
Provided with positive lens.
4. a kind of tunable laser according to claim 1, it is characterised in that：Described reflecting system can adjust one-dimensional
Or two dimension angular.
5. a kind of tunable laser according to claim 1, it is characterised in that：Described reflecting system reflects for MEMS
Mirror or motor-driven reflecting optics are constituted.
6. a kind of tunable laser according to claim 1, it is characterised in that：The free light of described F-P etalons
Spectral limit is more than the wave-length coverage of incident light.
7. a kind of tunable laser according to claim 1, it is characterised in that：The shaft centre line of described field lens with it is anti-
The inflexion point for penetrating system is overlapped.
8. a kind of tunable laser according to claim 1, it is characterised in that：Described field lens is spherical mirror, aspheric
Face mirror or cylindrical mirror.
9. a kind of tunable laser according to claim 1, it is characterised in that：The second described hysteroscope is coated with operating wave
Long high-reflecting film.
10. a kind of tunable laser according to claim 1, it is characterised in that：The first described hysteroscope is outgoing mirror,
The first described hysteroscope is coated with the reflectance coating of operation wavelength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720281137.8U CN206611012U (en) | 2017-03-22 | 2017-03-22 | A kind of tunable laser |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720281137.8U CN206611012U (en) | 2017-03-22 | 2017-03-22 | A kind of tunable laser |
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| Publication Number | Publication Date |
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| CN206611012U true CN206611012U (en) | 2017-11-03 |
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ID=60166286
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| CN201720281137.8U Active CN206611012U (en) | 2017-03-22 | 2017-03-22 | A kind of tunable laser |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110165533A (en) * | 2019-05-06 | 2019-08-23 | 北京图湃影像科技有限公司 | A kind of frequency swept laser and its implementation |
-
2017
- 2017-03-22 CN CN201720281137.8U patent/CN206611012U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110165533A (en) * | 2019-05-06 | 2019-08-23 | 北京图湃影像科技有限公司 | A kind of frequency swept laser and its implementation |
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Address after: 350100 floor 5, building 19, phase II, innovation park, No. 7, middle wulongjiang Avenue, Shangjie Town, Minhou County, Fuzhou City, Fujian Province Patentee after: Fujian Haichuang Photoelectric Technology Co.,Ltd. Address before: 350005 room 505, 5 / F, zone B, Chuangye building, Haixi high tech Industrial Park, high tech Zone, Fuzhou, Fujian Patentee before: FUJIAN HAICHUANG PHOTOELECTRIC CO.,LTD. |