CN210376132U - Small terahertz time-domain spectrograph - Google Patents
Small terahertz time-domain spectrograph Download PDFInfo
- Publication number
- CN210376132U CN210376132U CN201921026561.3U CN201921026561U CN210376132U CN 210376132 U CN210376132 U CN 210376132U CN 201921026561 U CN201921026561 U CN 201921026561U CN 210376132 U CN210376132 U CN 210376132U
- Authority
- CN
- China
- Prior art keywords
- terahertz
- data
- data acquisition
- module
- control unit
- 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.)
- Active
Links
Images
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The utility model discloses a small terahertz time-domain spectrograph, which comprises an optical system unit and a data acquisition and control unit; the data and control signal output end of the optical system unit is connected with the data and control signal input end of the data acquisition and control unit; the optical system unit comprises an optical fiber femtosecond laser, a photoconductive antenna, a terahertz transmission and sample cell and a terahertz electro-optic detector; the optical fiber femtosecond laser is connected with an optical path of the photoconductive antenna, the photoconductive antenna is connected with an optical path of the terahertz transmission and sample cell, the terahertz transmission and sample cell is connected with an optical path of the terahertz electro-optic detector, and the terahertz electro-optic detector is connected with an optical path of the optical fiber femtosecond laser. The utility model discloses product measurement result is more accurate, and the price is low, and small etc. has improved and has used the convenience, can let general personnel also can develop the material detection work smoothly, has promoted application on a large scale of terahertz time domain spectrum appearance now.
Description
Technical Field
The utility model relates to terahertz technical field more specifically relates to a small-size terahertz time domain spectrum appearance now.
Background
At present, relevant manufacturers at foreign countries, at home and the like have also provided terahertz time-domain spectrograph products. The products have wider application in the scientific research field, but are not optimized aiming at the specific application field such as food and drug detection, so that the products are not suitable for general personnel to carry out substance detection: 1) the terahertz time-domain spectrometer generally adopts femtosecond laser to excite a photoconductive antenna to generate terahertz waves, but the conventional product needs a user to configure a femtosecond laser, so that the size is large and the product is expensive; 2) the mechanical delay line is adopted as a terahertz pulse scanning mechanism, so that the scanning speed is low, and the system integration and miniaturization are not facilitated. Due to the reasons, the wide-range popularization and application of the terahertz time-domain spectrograph is limited.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art not enough, provide a small-size terahertz time domain spectrum appearance now, product measurement result is more accurate, and the price is low, and is small etc. has improved and has used the convenience, can let general personnel also can develop material detection work smoothly, has promoted application on a large scale of terahertz time domain spectrum appearance now.
The purpose of the utility model is realized through the following technical scheme:
a small terahertz time-domain spectrometer comprising: an optical system unit and a data acquisition and control unit; the data and control signal output end of the optical system unit is connected with the data and control signal input end of the data acquisition and control unit; the optical system unit comprises an optical fiber femtosecond laser, a photoconductive antenna, a terahertz transmission and sample cell and a terahertz electro-optic detector; the optical fiber femtosecond laser is connected with an optical path of a photoconductive antenna, the photoconductive antenna is connected with an optical path of a terahertz transmission and sample cell, the terahertz transmission and sample cell is connected with an optical path of a terahertz electro-optic detector, and the terahertz electro-optic detector is connected with an optical path of the optical fiber femtosecond laser; the data acquisition and control unit comprises a voltage control module, an optical delay line control module, a data acquisition module and a data communication module; the voltage control module is connected with the optical delay line control module, the optical delay line control module is connected with the data acquisition module, and the data acquisition module is connected with the data communication module.
Further, the device comprises a mechanical structure, wherein the mechanical structure is mechanically connected with the optical system unit, and the mechanical structure is mechanically connected with the data acquisition and control unit.
And further, the system comprises a human-computer interaction unit, wherein the data and control signal input end of the human-computer interaction unit is connected with the data and control signal output end of the data acquisition and control unit.
Furthermore, the human-computer interaction unit comprises a substance component identification and quantitative detection module, and the data and control signal input end of the substance component identification and quantitative detection module is connected with the data and control signal output end of the data acquisition and control unit.
Furthermore, the human-computer interaction unit comprises a data communication module, and the data communication module is connected with the data acquisition and control unit.
Furthermore, the human-computer interaction unit comprises a data processing module, and the data processing module is connected with the data acquisition and control unit.
Furthermore, the human-computer interaction unit comprises a user interface module, and the user interface module is connected with the data acquisition and control unit.
The utility model has the advantages that:
(1) the utility model discloses an optical system unit and data acquisition and the control unit etc. product measuring result is more accurate, and the price is low, and small etc. has improved and has used the convenience, can let general personnel also can develop the material detection work smoothly, has promoted the application on a large scale of terahertz time domain spectrum appearance now. Specifically, the utility model adopts a low-cost miniaturized femtosecond laser, reduces the product cost, and can be integrated into a terahertz time-domain spectrometer system; the terahertz pulse is scanned by adopting the electric control optical fiber delay module, the scanning speed is high, and the volume of the instrument is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The technical solution of the present invention is described in further detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following description. Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Before describing the embodiments, some necessary terms need to be explained. For example:
if the terms "first," "second," etc. are used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. Thus, a "first" element discussed below could also be termed a "second" element without departing from the teachings of the present invention. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly connected" or "directly coupled" to another element, there are no intervening elements present.
The various terms appearing in this application are used for the purpose of describing particular embodiments only and are not intended as limitations on the invention, except where the context clearly dictates otherwise, the singular is intended to include the plural as well.
When the terms "comprises" and/or "comprising" are used in this specification, these terms are intended to specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence and/or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
As shown in fig. 1, a small terahertz time-domain spectrometer includes: an optical system unit and a data acquisition and control unit; the data and control signal output end of the optical system unit is connected with the data and control signal input end of the data acquisition and control unit; the optical system unit comprises an optical fiber femtosecond laser, a photoconductive antenna, a terahertz transmission and sample cell and a terahertz electro-optic detector; the optical fiber femtosecond laser is connected with an optical path of a photoconductive antenna, the photoconductive antenna is connected with an optical path of a terahertz transmission and sample cell, the terahertz transmission and sample cell is connected with an optical path of a terahertz electro-optic detector, and the terahertz electro-optic detector is connected with an optical path of the optical fiber femtosecond laser; the data acquisition and control unit comprises a voltage control module, an optical delay line control module, a data acquisition module and a data communication module; the voltage control module is connected with the optical delay line control module, the optical delay line control module is connected with the data acquisition module, and the data acquisition module is connected with the data communication module.
Further, the device comprises a mechanical structure, wherein the mechanical structure is mechanically connected with the optical system unit, and the mechanical structure is mechanically connected with the data acquisition and control unit.
And further, the system comprises a human-computer interaction unit, wherein the data and control signal input end of the human-computer interaction unit is connected with the data and control signal output end of the data acquisition and control unit.
Furthermore, the human-computer interaction unit comprises a substance component identification and quantitative detection module, and the data and control signal input end of the substance component identification and quantitative detection module is connected with the data and control signal output end of the data acquisition and control unit.
Furthermore, the human-computer interaction unit comprises a data communication module, and the data communication module is connected with the data acquisition and control unit.
Furthermore, the human-computer interaction unit comprises a data processing module, and the data processing module is connected with the data acquisition and control unit.
Furthermore, the human-computer interaction unit comprises a user interface module, and the user interface module is connected with the data acquisition and control unit.
Example 1
As shown in fig. 1, those skilled in the art can implement the present invention as a small terahertz time-domain spectrometer, which is provided with an optical system unit and a data acquisition and control unit; the data and control signal output end of the optical system unit is connected with the data and control signal input end of the data acquisition and control unit; the optical system unit comprises an optical fiber femtosecond laser, a photoconductive antenna, a terahertz transmission and sample cell and a terahertz electro-optic detector; the optical fiber femtosecond laser is connected with an optical path of a photoconductive antenna, the photoconductive antenna is connected with an optical path of a terahertz transmission and sample cell, the terahertz transmission and sample cell is connected with an optical path of a terahertz electro-optic detector, and the terahertz electro-optic detector is connected with an optical path of the optical fiber femtosecond laser; the data acquisition and control unit comprises a voltage control module, an optical delay line control module, a data acquisition module and a data communication module; the voltage control module is connected with the optical delay line control module, the optical delay line control module is connected with the data acquisition module, and the data acquisition module is connected with the data communication module.
In the present embodiment, the following embodiments are not limited:
terahertz wave emission source: the method is characterized in that a femtosecond laser is adopted to excite a photoconductive antenna to generate the ultra-continuous wide-spectrum terahertz wave. The femtosecond laser adopts compact fiber femtosecond laser to replace the traditional huge titanium-doped sapphire femtosecond laser, reduces the system volume, greatly reduces the system requirement on the environment, and improves the practicability. The photoconductive antenna is only as large as a nail cover, and can radiate terahertz waves within the range of 0.1-3 THz.
Terahertz wave transmission and sample cell unit: terahertz waves emitted by the photoconductive antenna are divergent, a plurality of off-axis parabolic mirrors are adopted to collimate and focus terahertz beams, the sample pool can be placed at the focus of a terahertz signal, terahertz light passing through a sample and carrying sample information is focused by the off-axis parabolic mirrors again to irradiate the electro-optic crystal, and the terahertz light is detected by the electro-optic crystal.
A terahertz detector: the femtosecond pulse laser emitted by the fiber femtosecond laser is divided into two beams, one beam is used for exciting the photoconductive antenna to generate terahertz pulses (the pulse width of the terahertz pulses is far larger than that of the femtosecond laser), and the other beam is used as probe light to scan the terahertz pulses by adding time delay through a delay line, so that terahertz pulse waveforms are obtained. The terahertz pulse and the detection light are coaxially incident to the electro-optic crystal, the electro-optic crystal has birefringence characteristics due to the terahertz electric field, the polarization characteristics of the detection light are changed, and the electric field intensity of the terahertz wave at a certain moment can be obtained by measuring the elliptical polarization degree of the detection light and amplifying the detection light through phase locking.
In other technical features in this embodiment, those skilled in the art can flexibly select the technical features according to actual situations to meet different specific actual requirements. However, it will be apparent to one of ordinary skill in the art that: it is not necessary to employ these specific details to practice the invention. In other instances, well-known components, structures or parts are not described in detail in order to avoid obscuring the present invention, and the technical scope of the present invention is defined by the claims.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are used in a generic sense as is understood by those skilled in the art. For example, the components may be fixedly connected, movably connected, integrally connected, or partially connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediate medium, or connected inside two elements, and the like, and for those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations, that is, the expression of the language and the implementation of the actual technology can flexibly correspond, and the expression of the language (including the drawings) of the specification of the present invention does not constitute any single restrictive interpretation of the claims.
Modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the invention, which should be limited only by the claims appended hereto. In the previous description, numerous specific details were set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to one of ordinary skill in the art that: it is not necessary to employ these specific details to practice the invention. In other instances, well-known techniques, such as specific construction details, operating conditions, and other technical conditions, have not been described in detail in order to avoid obscuring the present invention.
Claims (7)
1. A small-size terahertz time-domain spectroscopy is characterized by comprising: an optical system unit and a data acquisition and control unit; the data and control signal output end of the optical system unit is connected with the data and control signal input end of the data acquisition and control unit;
the optical system unit comprises an optical fiber femtosecond laser, a photoconductive antenna, a terahertz transmission and sample cell and a terahertz electro-optic detector; the optical fiber femtosecond laser is connected with an optical path of a photoconductive antenna, the photoconductive antenna is connected with an optical path of a terahertz transmission and sample cell, the terahertz transmission and sample cell is connected with an optical path of a terahertz electro-optic detector, and the terahertz electro-optic detector is connected with an optical path of the optical fiber femtosecond laser;
the data acquisition and control unit comprises a voltage control module, an optical delay line control module, a data acquisition module and a data communication module; the voltage control module is connected with the optical delay line control module, the optical delay line control module is connected with the data acquisition module, and the data acquisition module is connected with the data communication module.
2. The miniature terahertz time-domain spectrometer of claim 1, comprising a mechanical structure, wherein the mechanical structure is mechanically connected with the optical system unit, and the mechanical structure is mechanically connected with the data acquisition and control unit.
3. The small terahertz time-domain spectroscopy of claim 1, comprising a human-computer interaction unit, wherein a data and control signal input end of the human-computer interaction unit is connected with a data and control signal output end of the data acquisition and control unit.
4. The small terahertz time-domain spectroscopy of claim 3, wherein the human-computer interaction unit comprises a substance component identification and quantitative detection module, and a data and control signal input end of the substance component identification and quantitative detection module is connected with a data and control signal output end of the data acquisition and control unit.
5. The small terahertz time-domain spectroscopy of claim 3, wherein the human-computer interaction unit comprises a data communication module, and the data communication module is connected with the data acquisition and control unit.
6. The small terahertz time-domain spectroscopy of claim 3, wherein the human-computer interaction unit comprises a data processing module, and the data processing module is connected with the data acquisition and control unit.
7. The small terahertz time-domain spectrometer according to claim 3, wherein the human-computer interaction unit comprises a user interface module, and the user interface module is connected with the data acquisition and control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921026561.3U CN210376132U (en) | 2019-07-03 | 2019-07-03 | Small terahertz time-domain spectrograph |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921026561.3U CN210376132U (en) | 2019-07-03 | 2019-07-03 | Small terahertz time-domain spectrograph |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210376132U true CN210376132U (en) | 2020-04-21 |
Family
ID=70269047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921026561.3U Active CN210376132U (en) | 2019-07-03 | 2019-07-03 | Small terahertz time-domain spectrograph |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210376132U (en) |
-
2019
- 2019-07-03 CN CN201921026561.3U patent/CN210376132U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201662531U (en) | Small-sized Terahertz time-domain spectrograph | |
| CN2874476Y (en) | Terahertz time domain spectral instrument based on optical rectification | |
| CN106442394B (en) | A kind of Terahertz near field imaging system and method | |
| US7535005B2 (en) | Pulsed terahertz spectrometer | |
| CN104677497B (en) | Detection device and method for properties of terahertz waves | |
| CN106769971B (en) | A kind of infrared spectroscopy system based on femtosecond pump probe | |
| CN105784634A (en) | Terahertz time domain spectrograph capable of measuring transmission and reflection simultaneously under vertical incidence | |
| EP2098853A2 (en) | Terahertz spectrometer | |
| CN209356405U (en) | A kind of near field THz wave spectrum imaging system | |
| US10048196B2 (en) | Cavity enhanced spectroscopy using off-axis paths | |
| US20180209848A1 (en) | Far-Infrared Spectroscopy Device | |
| CN108844913A (en) | A kind of terahertz time-domain spectroscopy system and operating method | |
| CN113281298B (en) | Terahertz material micro-nano defect detection device and method based on multi-frequency point information fusion | |
| CN105548083A (en) | Double-optical-path terahertz time-domain spectrometer | |
| CN110987900A (en) | High-sensitivity Raman spectrometer based on photomultiplier | |
| Beck et al. | High-speed THz spectroscopic imaging at ten kilohertz pixel rate with amplitude and phase contrast | |
| US20200124476A1 (en) | Compact two-dimensional spectrometer | |
| CN108287132B (en) | Terahertz asynchronous high-speed scanning system trigger signal generation device and method | |
| CN210376132U (en) | Small terahertz time-domain spectrograph | |
| CN2938081Y (en) | Pocket near-infrared fibre-optical spectral device | |
| CN210376134U (en) | Terahertz-based indoor environmental pollutant detection device | |
| CN218847408U (en) | Small handheld detection probe device and system of terahertz optical fiber spectrometer | |
| CN211927689U (en) | Spectrum detection device | |
| CN110658155B (en) | Terahertz spectrograph based on electron spin emission and spectral analysis system | |
| CN211785622U (en) | Terahertz pulse beam extraction mechanism of terahertz near-field microscope |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |