CN102866468A - Hollow photonic crystal optical fiber gas absorption cell device and manufacturing method thereof - Google Patents
Hollow photonic crystal optical fiber gas absorption cell device and manufacturing method thereof Download PDFInfo
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- CN102866468A CN102866468A CN2012103276758A CN201210327675A CN102866468A CN 102866468 A CN102866468 A CN 102866468A CN 2012103276758 A CN2012103276758 A CN 2012103276758A CN 201210327675 A CN201210327675 A CN 201210327675A CN 102866468 A CN102866468 A CN 102866468A
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Abstract
The invention relates to a hollow photonic crystal optical fiber gas absorption cell device and a manufacturing method thereof. The device comprises a hollow photonic crystal optical fiber, a protective sleeve, a hermetic cabin, a vacuum gauge, a vacuum valve, window glass, a coupling mirror and a regulating component. According to the device disclosed by the invention, the characteristics that the hollow photonic crystal optical fiber is flexible and bendable and gas can be filled into a fiber core are utilized, quantitative injection of gas can be realized by using the hermetic cabin, the vacuum gauge and the vacuum valve, a light beam can enter the hollow photonic crystal optical fiber by being coupled by the coupling mirror and the window glass, and sealing is performed by an optical fiber metalization and feed-through welding process. The device disclosed by the invention has the characteristics of compact and small structure, high reliability, controllable gas pressure, repeated use and high coincidence degree of the section of the light beam and the gas section. The device disclosed by the invention can be used for gas spectroscopic analysis experiments and the gas absorption cell taking the frequency of a frequency stabilized laser as reference.
Description
Technical field
The present invention relates to a kind of Hollow-Core Photonic Crystal Fibers gas absorption pool device and preparation method thereof, this device can be applicable to the fields such as gas absorption analysis of spectrum, laser frequency stabilization, cold atomic clock.
Background technology
In fields such as gas absorption analysis of spectrum, laser frequency stabilization, cold atomic clocks, all need to have a characteristic frequency and the high laser instrument of frequency stability, utilizing gaseous absorption line to carry out frequency stabilization as frequency reference is exactly a kind of method that realizes this laser instrument.
Gas absorption cell is one of necessary parts of realizing as frequency reference with gaseous absorption line laser frequency stabilization.For the more weak gas of some absorption intensity, need to there be the interaction distance of light and gas longer.Special in spaceborne, airborne, vehicle-mounted application in addition, frequency stabilized laser is also had the requirement of weight and antidetonation, so gas absorption cell also will to have a volume little, lightweight, the characteristics that robustness is high.Traditional gas absorption cell Typical Representative has White type absorption cell, and (reference is technology [1]: J.U.White. " Long optical paths of large aperture " formerly, J.O.S.A, Vol.32, May 1942) and Herriott type absorption cell (with reference to technology [2]: D.Herriott formerly, H.Kogelnok, and R.Kompfner, " Off-Axis Paths in Spherical Mirror Interferometers ", Applied Optics, Vol.3, Iss.4,1 April 1964), all need to control the beam incident angle degree, utilize the chamber mirror to allow light realize that in the space Multi reflection increases the interaction distance of light and gas, optical stability is difficult the assurance; These two kinds of structural volume are larger, and weight is heavier, and it is more difficult to carry out impermeability; And damage easily, reliability is not high.So the gas absorption cell of these two kinds of structures can not satisfy spaceborne, airborne, vehicle-mounted application to optical stability, impermeability, the specific (special) requirements of reliability.
The people such as P.S.Light have proposed a kind of Hollow-Core Photonic Crystal Fibers that utilizes and have realized that volume is little, lightweight, (reference is technology [3]: P.S.Light formerly for the scheme of the acetylene gas absorption cell that robustness is high, F.Couny, and F.Benabid. " Low optical insertion-loss and vacuum-pressure all-fiber acetylene cell based on hollow-core photonic crystal fiber ", Optics Letters, Vol.31, No.17,1 September 2006), this scheme is to be filled with first the acetylene gas of specifying air pressure in Hollow-Core Photonic Crystal Fibers, be filled with helium again until air pressure is slightly larger than ambient pressure, again with Hollow-Core Photonic Crystal Fibers two ends and general single mode fiber welding, wait for that at last whole diffusions of covering that helium passes through Hollow-Core Photonic Crystal Fibers to outer fiber, finish the making of Hollow-Core Photonic Crystal Fibers gas absorption cell.But there is following problems in this scheme: in case gas absorption cell completes, the air pressure in the gas pond or gaseous species just can't change.So this scheme can only be made the gas absorption cell of determining all kinds of and definite air pressure of gas, be not suitable for the experiment link of the frequency stabilization parameter optimization that need to adjust air pressure.
The people such as Poberezhskiy I.Y. propose a kind of scheme that can realize charging and discharging gas the Hollow-Core Photonic Crystal Fibers gas absorption cell of gentle pressure-controlled (with reference to technology [4] formerly: Ilya Y.Poberezhskiy, Patrick Meras, and et al. " Compact and robust refilling and connectorization of a hollow core photonic crystal fiber gas reference cells ", The 20
ThAnnual Meeting of the IEEE Laser and Electro-Optics Society; 2007); this scheme is aimed at multimode optical fiber Hollow-Core Photonic Crystal Fibers with silica-based V-type groove; realize optically-coupled; and leave some spaces between two optical fiber end; for charging and discharging gas; optical fiber and the V-type groove aimed at are placed on the aluminium sheet; the fibre-optical splice place protects with a quartz ampoule; use epoxy sealing; quartz ampoule can connect valve, vacuum extractor or aerating device, and realization can charge and discharge gas, realize the absorption cell of air pressure control.It is poor that but the impermeability of epoxy sealing method and firm degree are compared with the metal solder method; In addition, the fine footpath of Hollow-Core Photonic Crystal Fibers and common single mode or multimode optical fiber is different, realizes that the V-type groove of optical fiber align can not be realized with the method for machining, must make of the method for photoetching.
Summary of the invention
The object of the invention is to overcome the deficiency of above-mentioned formerly technology, Hollow-Core Photonic Crystal Fibers gas absorption pool device and preparation method thereof is provided, this scheme is used up fine metallization scheme and feedthrough weldering, metal solder technique, realize high-air-tightness, high robustness, can charge and discharge gas the Hollow-Core Photonic Crystal Fibers gas absorption cell of control air pressure.
Technical solution of the present invention is as follows:
A kind of Hollow-Core Photonic Crystal Fibers gas absorption pool device, its characteristics are that this device is made of the gastight joint at Hollow-Core Photonic Crystal Fibers and two ends thereof, and described gastight joint has identical structure:
Described gastight joint comprises protective sleeve; sealed chamber; vacuum meter; vacuum valve; window glass; outer adjusting assembly; interior adjusting part; coupling mirror; the annexation of above-mentioned component is as follows: described sealed chamber has optical fiber interface; snorkel and sealed chamber window; described optical fiber interface is relative with the sealed chamber window; described optical fiber interface is used for connecting described Hollow-Core Photonic Crystal Fibers; the connecting portion of this Hollow-Core Photonic Crystal Fibers and optical fiber interface is protected with protective sleeve; at described snorkel described vacuum meter and vacuum valve are installed; described window glass plating is with ring-like metal film; be connected with metal solder technique with described sealed chamber window; described outer adjusting assembly is screwed from sealed chamber window direction and described sealed chamber; described interior adjusting part is a hollow cylinder; cylinder has the member of fine thread outward; described coupling mirror is fixed on the inner of cylinder of described interior adjusting part; the outer termination of adjusting part has the ordinary optic fibre of FC joint in being somebody's turn to do; the outer fine thread of described interior adjusting part screws in the internal thread of described outer adjusting assembly; rotation by interior adjusting part is to change the degree of depth that cooperates of interior adjusting part and outer adjusting assembly, and position of adjusting part locks by the radial screw of outer adjusting assembly in this.
Described Hollow-Core Photonic Crystal Fibers adopts the feedthrough Welding to be connected with described sealed chamber, namely after the described Hollow-Core Photonic Crystal Fibers process optical fiber metalized, inserts in the optical fiber interface of described sealed chamber, connects with the feedthrough Welding.
The method for making of described Hollow-Core Photonic Crystal Fibers gas absorption pool device, its characteristics are that the method comprises the steps:
1), Hollow-Core Photonic Crystal Fibers is connected with gastight joint:
1. at first the method with magnetron sputtering plates one deck endless metal film in the zone of window glass contact sealed chamber, window glass is welded on the window of sealed chamber with metal solder technique again;
2. the snorkel at sealed chamber installs vacuum meter and vacuum valve;
3. Hollow-Core Photonic Crystal Fibers wherein an end choose the coat that appropriate length is removed, coat protection glue in its endface position, seal the opening of Hollow-Core Photonic Crystal Fibers end face, prevent that the inside that in optical fiber metallization processes chemical reagent enters Hollow-Core Photonic Crystal Fibers from resulting in blockage; Removed metal level on the plated surface of coat at Hollow-Core Photonic Crystal Fibers one end with existing optical fiber metallization process, again the head that scribbles protection glue is sliced off, the optical fiber interface that will be inserted into through an end of the Hollow-Core Photonic Crystal Fibers of above-mentioned processing sealed chamber welds with existing feedthrough Welding, packages protective sleeve in the outside, junction at last;
4. coupling mirror is fixed on the interior adjusting part with the optics epoxy glue, assembles successively outer adjusting assembly, interior adjusting part, outer termination of adjusting part has the ordinary optic fibre of FC joint in this;
2), the other end of Hollow-Core Photonic Crystal Fibers and gastight joint are connected by as above step 1);
3), the Hollow-Core Photonic Crystal Fibers gas absorption pool device that connects is carried out optical path adjusting: the ordinary optic fibre of one of them gastight joint is connected laser instrument; The outer adjusting assembly of another gastight joint temporarily separates with sealed chamber, surveys luminous power from the Hollow-Core Photonic Crystal Fibers outgoing at its sealed chamber window place with light power meter; Regulate previous gastight joint and regulate the position of assembly and interior adjusting part outward, until the luminous power that light power meter detects is maximum; Then light power meter is removed, outer adjusting assembly and the sealed chamber of a rear gastight joint are coupled together, behind its ordinary optic fibre, connect light power meter, regulate its outer position of regulating assembly and interior adjusting part, until the luminous power that light power meter detects is maximum, finish optical path adjusting, complete.
Described sealed chamber is used for keeping the impermeability of Hollow-Core Photonic Crystal Fibers inside, regulate the air pressure of control Hollow-Core Photonic Crystal Fibers inside by vacuum meter and vacuum valve, can also seal the snorkel of sealed chamber in addition, remove vacuum meter, vacuum valve, gas cylinder and vacuum pump, use as small and exquisite gas absorption cell.
Described outer adjusting assembly and interior adjusting part are for the relative position of regulating Hollow-Core Photonic Crystal Fibers and ordinary optic fibre, and be maximum in order to guarantee coupling efficiency between the two.
The present invention compares with technology formerly, has the following advantages and good effect:
1, compare with formerly technology [1], [2], Hollow-Core Photonic Crystal Fibers gas absorption cell volume of the present invention is little, and quality is light, and sound construction is reliable, and impermeability is high, is more suitable for using under the rugged surroundings such as spaceborne, airborne.
2, compare with technology [3] formerly, Hollow-Core Photonic Crystal Fibers gas absorption cell of the present invention can be changed gas and change air pressure, can be used for adjusting the experiment link of the frequency stabilization parameter optimization of air pressure.
3, compare with technology [4] formerly, Hollow-Core Photonic Crystal Fibers gas absorption cell of the present invention is realized sealing with feedthrough Welding and metal solder technique, impermeability and sound construction program are than better with epoxy resin or other gluing methods, do not use in addition the V-type groove, without photoetching process, process simpler.
In a word, it is small and exquisite that apparatus of the present invention have compact conformation, and reliability is high, and air pressure is controlled, and is reusable, the characteristics that beam cross section and gas cross section registration are high.Can be used for the spectrochemical analysis for gases experiment, the gas absorption cell of frequency stabilized laser frequency reference,
Description of drawings
Fig. 1 is the structural representation of Hollow-Core Photonic Crystal Fibers gas absorption pool device of the present invention
Fig. 2 is another example structure synoptic diagram of structure of Hollow-Core Photonic Crystal Fibers gas absorption pool device of the present invention
Embodiment
Below in conjunction with example and accompanying drawing the present invention is further specified, but should not limit protection scope of the present invention with this.
See also first Fig. 1, Fig. 1 is the structural representation figure of Hollow-Core Photonic Crystal Fibers gas absorption pool device of the present invention.As seen from the figure, Hollow-Core Photonic Crystal Fibers gas absorption pool device of the present invention is made of the gastight joint at Hollow-Core Photonic Crystal Fibers 1 and two ends thereof, and described gastight joint has identical structure:
Described gastight joint comprises protective sleeve 2; sealed chamber 3; vacuum meter 4; vacuum valve 5; window glass 6; outer adjusting assembly 7; interior adjusting part 8; coupling mirror 9; the annexation of above-mentioned component is as follows: described sealed chamber 3 has optical fiber interface 3a; snorkel 3b and sealed chamber window 3c; described optical fiber interface 3a is relative with sealed chamber window 3c; described optical fiber interface 3a is used for connecting described Hollow-Core Photonic Crystal Fibers 1; this Hollow-Core Photonic Crystal Fibers 1 is protected with protective sleeve 2 with the connecting portion of optical fiber interface 3a; at described snorkel 3b described vacuum meter 4 and vacuum valve 5 are installed; described window glass 6 platings are with ring-like metal film; be connected with metal solder technique with described sealed chamber window 3c; described outer adjusting assembly 7 is screwed from sealed chamber window 3c direction and described sealed chamber 3; described interior adjusting part 8 is hollow cylinders; cylinder has the member of fine thread outward; described coupling mirror 9 is fixed on the inner of cylinder of described interior adjusting part 8; the outer termination of adjusting part 8 has the ordinary optic fibre 10 of FC joint in being somebody's turn to do; the outer fine thread of described interior adjusting part 8 screws in the internal thread of described outer adjusting assembly 7; rotation by interior adjusting part 8 is to change the degree of depth that cooperates of interior adjusting part 8 and outer adjusting assembly 7, and position of adjusting part 8 locks by the radial screw of outer adjusting assembly 7 in this.
Described Hollow-Core Photonic Crystal Fibers 1 adopts the feedthrough Welding to connect with being connected of described sealed chamber 3, after being the end 1a process optical fiber metalized of described Hollow-Core Photonic Crystal Fibers 1, insert among the optical fiber interface 3a of described sealed chamber 3, connect with the feedthrough Welding.
During use, as the gas access, the snorkel 3b of the sealed chamber 3 that connects is connected with gas cylinder with an end 1a of Hollow-Core Photonic Crystal Fibers 1, realizes being filled with of gas; The other end of Hollow-Core Photonic Crystal Fibers 1 is gas vent, and the snorkel 3b of this end is connected with vacuum pump, realizes the gas extraction.
Sealed chamber 3 is used for keeping the impermeability of Hollow-Core Photonic Crystal Fibers 1 inside, regulates the air pressure of controlling Hollow-Core Photonic Crystal Fibers 1 inside by the vacuum meter 4 that is installed on the snorkel 3b with vacuum valve 5.
Can also seal the snorkel of sealed chamber in addition, remove vacuum meter, vacuum valve, use as small and exquisite gas absorption cell, as shown in Figure 2.
The concrete making step of Hollow-Core Photonic Crystal Fibers gas absorption pool device of the present invention is as follows:
1, Hollow-Core Photonic Crystal Fibers 1 is connected with gastight joint:
1. at first the method with magnetron sputtering plates one deck endless metal film in the zone of window glass 6 contact sealed chambers 3, window glass 6 is welded on the window 3c of sealed chamber 3 with metal solder technique again;
2. install vacuum meter 4 and vacuum valve 5 at the snorkel 3b of sealed chamber 3;
3. Hollow-Core Photonic Crystal Fibers 1 wherein an end 1a choose the coat that appropriate length is removed, coat protection glue in its endface position, seal the opening of Hollow-Core Photonic Crystal Fibers 1 end face, prevent that the inside that in optical fiber metallization processes chemical reagent enters Hollow-Core Photonic Crystal Fibers 1 from resulting in blockage; Removed metal level on the plated surface of coat at Hollow-Core Photonic Crystal Fibers 1 one end 1a with existing optical fiber metallization process, again the head that scribbles protection glue is sliced off, the optical fiber interface 3a that will be inserted into through an end 1a of the Hollow-Core Photonic Crystal Fibers 1 of above-mentioned processing sealed chamber 3 welds with existing feedthrough Welding, packages protective sleeve 2 in the outside, junction at last;
4. coupling mirror 9 usefulness optics epoxy glues are fixed on the interior adjusting part 8, assemble successively outer adjusting assembly 7, interior adjusting part 8, outer termination of adjusting part 8 has the ordinary optic fibre 10 of FC joint in this;
2, the other end of Hollow-Core Photonic Crystal Fibers 1 connects by as above step 1;
3, the Hollow-Core Photonic Crystal Fibers gas absorption pool device that connects is carried out optical path adjusting: the ordinary optic fibre 10 of one of them gastight joint is connected laser instrument; Outer adjusting assembly 7 and the sealed chamber 3 of another gastight joint temporarily separate, and survey luminous power from Hollow-Core Photonic Crystal Fibers 1 outgoing at its sealed chamber window 3c place with light power meter; Regulate previous gastight joint and regulate the position of assembly 7 and interior adjusting part 8 outward, until the luminous power that light power meter detects is maximum; Then light power meter is removed, outer adjusting assembly 7 and the sealed chamber 3 of a rear gastight joint are coupled together, behind its ordinary optic fibre 10, connect light power meter, regulate its outer position of regulating assembly 7 and interior adjusting part 8, until the luminous power that light power meter detects is maximum, finish optical path adjusting, the completing of Hollow-Core Photonic Crystal Fibers gas absorption pool device of the present invention.
Method of operating of the present invention is as follows:
1. the snorkel 3b of one of them gastight joint connects gas cylinder, as the gas access; The snorkel 3b of another gastight joint connects vacuum pump, as gas vent;
2. before being filled with experimental gas, with vacuum pump the gastight joint of Hollow-Core Photonic Crystal Fibers 1 with its two ends is evacuated first, at another snorkel 3b place access helium gas cylinder, with helium Hollow-Core Photonic Crystal Fibers 1 is washed, be evacuated with vacuum pump more at last;
2. snorkel 3b reconfiguration enters to test the gas cylinder of desired gas, be filled with experimental gas, vacuum meter 2 barometer readings of the snorkel 3b at place, gas access can be slightly larger than required air pressure, wait for that gas slowly is passed to gas outlet, until place, gas access vacuum meter 2 barometer readings equate with gas outlet vacuum meter 2 barometer readings, alternately opening vacuum pump and gas cylinder bleeds and inflates again, until the barometer reading of place, gas access and gas outlet is required air pressure, gas was filled with and finished this moment, can be used as the gas absorption cell of experiment usefulness;
3. when need making the absorption cell of small and exquisite structure, snorkel 3b pincers are pressed flat air tight, prescind vacuum meter 4 and vacuum valve 5, again snorkel 3b is filled scolder and seal, as shown in Figure 2.
The present invention has adopted optical fiber metallization, feedthrough welding, metal solder technique to realize the making of gas absorption cell, can guarantee well the sealing of absorption cell, and the fastness of structure, its compact conformation and light small and exquisite characteristics can be applicable to spaceborne applied environment well in addition.The project organization of sealed chamber can satisfy the adjustment to air pressure in the experimental phase, also snorkel can be sealed rear as small and exquisite gas absorption cell use.
Claims (3)
1. a Hollow-Core Photonic Crystal Fibers gas absorption pool device is characterized in that this device is made of the gastight joint at Hollow-Core Photonic Crystal Fibers (1) and two ends thereof, and described gastight joint has identical structure:
Described gastight joint comprises protective sleeve (2); sealed chamber (3); vacuum meter (4); vacuum valve (5); window glass (6); outer adjusting assembly (7); interior adjusting part (8); coupling mirror (9); the annexation of above-mentioned component is as follows: described sealed chamber (3) has optical fiber interface (3a); snorkel (3b) and sealed chamber window (3c); described optical fiber interface (3a) is relative with sealed chamber window (3c); described optical fiber interface (3a) is used for connecting described Hollow-Core Photonic Crystal Fibers (1); this Hollow-Core Photonic Crystal Fibers (1) is protected with protective sleeve (2) with the connecting portion of optical fiber interface (3a); at described snorkel (3b) described vacuum meter (4) and vacuum valve (5) are installed; described window glass (6) plating is with ring-like metal film; be connected with metal solder technique with described sealed chamber window (3c); described outer adjusting assembly (7) is screwed from sealed chamber window (3c) direction and described sealed chamber (3); described interior adjusting part (8) is a hollow cylinder; cylinder has the member of fine thread outward; described coupling mirror (9) is fixed on the inner of cylinder of described interior adjusting part (8); the outer termination of adjusting part (8) has the ordinary optic fibre (10) of FC joint in being somebody's turn to do; the outer fine thread of described interior adjusting part (8) screws in the internal thread of described outer adjusting assembly (7); rotation by interior adjusting part (8) is to change the degree of depth that cooperates of interior adjusting part (8) and outer adjusting assembly (7), and position of adjusting part (8) locks by the radial screw of outer adjusting assembly (7) in this.
2. Hollow-Core Photonic Crystal Fibers gas absorption pool device according to claim 1, it is characterized in that described Hollow-Core Photonic Crystal Fibers (1) and described sealed chamber (3) adopt the feedthrough Welding to be connected, after being described Hollow-Core Photonic Crystal Fibers (1) process optical fiber metalized, insert in the optical fiber interface (3a) of described sealed chamber (3), connect with the feedthrough Welding.
3. the method for making of claim 1 or 2 described Hollow-Core Photonic Crystal Fibers gas absorption pool devices is characterized in that the method comprises the steps:
1), Hollow-Core Photonic Crystal Fibers (1) is connected with gastight joint:
1. at first the method with magnetron sputtering plates one deck endless metal film in the zone of window glass (6) contact sealed chamber (3), uses metal solder technique window glass (6) to be welded on the window (3c) of sealed chamber (3) again;
2. the snorkel (3b) in sealed chamber (3) installs vacuum meter (4) and vacuum valve (5);
3. Hollow-Core Photonic Crystal Fibers (1) wherein an end (1a) choose the coat that appropriate length is removed, coat protection glue in its endface position, seal the opening of Hollow-Core Photonic Crystal Fibers (1) end face, prevent that the inside that in optical fiber metallization processes chemical reagent enters Hollow-Core Photonic Crystal Fibers (1) from resulting in blockage; Removed metal level on the plated surface of coat at Hollow-Core Photonic Crystal Fibers (1) one end (1a) with existing optical fiber metallization process, again the head that scribbles protection glue is sliced off, the optical fiber interface (3a) that will be inserted into through an end (1a) of the Hollow-Core Photonic Crystal Fibers (1) of above-mentioned processing sealed chamber (3) welds with existing feedthrough Welding, packages at last protective sleeve (2) in the outside, junction;
4. coupling mirror (9) is fixed on the interior adjusting part (8) with the optics epoxy glue, assembles successively outer adjusting assembly (7), interior adjusting part (8), outer termination of adjusting part (8) has the ordinary optic fibre (10) of FC joint in this;
2), the other end of Hollow-Core Photonic Crystal Fibers (1) and gastight joint are connected by as above step 1);
3), the Hollow-Core Photonic Crystal Fibers gas absorption pool device that connects is carried out optical path adjusting: the ordinary optic fibre of one of them gastight joint (10) is connected laser instrument; The outer adjusting assembly (7) of another gastight joint temporarily separates with sealed chamber (3), locates with the luminous power of light power meter detection from Hollow-Core Photonic Crystal Fibers (1) outgoing at its sealed chamber window (3c); Regulate previous gastight joint and regulate the position of assembly (7) and interior adjusting part (8) outward, until the luminous power that light power meter detects is maximum; Then light power meter is removed, the outer adjusting assembly (7) of a rear gastight joint and sealed chamber (3) are coupled together, behind its ordinary optic fibre (10), connect light power meter, regulate its outer position of regulating assembly (7) and interior adjusting part (8), until the luminous power that light power meter detects is maximum, finish optical path adjusting, complete.
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| CN109459425A (en) * | 2018-12-13 | 2019-03-12 | 云南电网有限责任公司电力科学研究院 | A kind of fiber adapters device applied to optical fiber gas sensing |
| CN109459425B (en) * | 2018-12-13 | 2021-05-11 | 云南电网有限责任公司电力科学研究院 | Optical fiber adapting device applied to optical fiber gas sensing |
| CN110749572A (en) * | 2019-10-29 | 2020-02-04 | 广州特种承压设备检测研究院 | Novel graphene optical fiber gas sensor measuring system and method for measuring hydrogen sulfide gas by using same |
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