KR101054357B1 - Three dimensional liquid-core/liquid cladding optical waveguide using dean vortex in a microchannel and light transferring method using the same - Google Patents

Abstract

PURPOSE: An optical waveguide apparatus using three dimensional liquid core and liquid cladding in a micro channel and an optical waveguide method using the same are provided to efficiently block vertical direction optical loss to the side of a channel wall, which is problem in two dimension optical wave guide technology, by applying 3D liquid core and liquid cladding optical wave guide. CONSTITUTION: A micro channel conduit line(10) has a curved pipe which is bent with a predetermined bending angle to form dean swirl in micro fluid. First cladding fluid is putted into a first cladding fluid input part(30) which is connected to one end of the micro channel conduit line. Core fluid is put into a core fluid input part(20), which is connected the first cladding fluid input part with a predetermined input angle in one end, along the flow direction of the first cladding fluid. An optical fiber(60) outputs the light irradiated from a predetermined light source(62) to the inside of the core fluid by being combined in one side of the core fluid input part.

Description

Optical wave guide device using three-dimensional liquid core and liquid cladding in microchannel and optical wave guide method using the device

The present invention relates to an optical wave guide device using a three-dimensional liquid core and liquid cladding in a microchannel and an optical wave guide method using the device. More specifically, it reduces optical loss when transporting light in the vertical direction (reduces optical loss when transporting light in two dimensions) and increases flow velocity to delay molecular diffusion and prevent sinking. It relates to a three-dimensional liquid core / liquid cladding optical guide device and method that can increase the path by.

Opto-fluidics is a combination of optics and hydrodynamics that manipulates the light source 62 for the purpose of detection, diagnosis, and analysis in micro-scale devices such as lab-on-a-chip. As this becomes important, research is being conducted in various fields. The optical wave guide device technology, which transfers light generated from the light source 62, includes chemical analysis and monitoring, medical diagnosis, real-time environmental monitoring, and chemical weapon detection using a small amount of samples from the light source 62 itself. It is being used in various fields for the purpose of on-chip analysis of micro scale, and much research is being conducted.

The optical waveguide device originates from a solid-core / solid-clad optical fiber and later through the liquid-core / solid-cladding optical waveguide device to provide a liquid-core / liquid-like advantage. Advances in cladding optical waveguide devices.

Compared to the existing system, the optically smooth core / cladding interface can be obtained, the numerical aperture (NA) of the wave guide device can be actively adjusted, and various applications are possible depending on the choice of the core fluid. Will have. The numerical aperture of the waveguide device is defined by the following equation.

Where NA represents the numerical aperture and n _core And n _cladding represent the refractive index of the core and cladding, respectively.

J for an optical wave guide device having the above characteristics. JA Olivares et al. (Liguid Core Waveguide for Full Imaging of Electrophoretic Separations, Anal. Chem., 2002, 2008-2013) provides a visualization of DNA separation using liquid-core / solid-cladding optical waveguide devices. A study was conducted on D. B. Olf et al. (DB Wolfe et al. (Dynamic Control of Liquid-Core / Liquid-Cladding, Proc. Natl. Acad. Sci. USA, 2004, 12434-12438)) -Applications such as optical switch using core / liquid-cladding optical waveguide device are presented. However, research in D. B. Olf et al. Has limitations as a two-dimensional optical waveguide device in which the core fluid and the channel wall contact in the vertical direction of the microchannel.

The solid-core / solid-cladding optical fiber or liquid-core / solid-cladding optical waveguide device proposed in the existing literature has the most stable performance to date, but it is not geometrical and is used to control the numerical aperture of the waveguide device. There is a limit.

In order to supplement the shortcomings of such solid-core / solid-clad optical fiber or liquid-core / solid-clad optical waveguide device, some documents describe a liquid-core / liquid-clad optical waveguide device, but two-dimensional Staying in shape. As a result, the core fluid and the channel wall contact each other in the vertical direction in the microchannel. The efficiency of the optical waveguide device is basically determined by the refractive index difference between the core and the cladding material. In general, since the refractive index of the cladding fluid is smaller than that of the material (e.g. PDMS, Polydimethylsiloxane), which is mainly used for the production of microchannels, optical loss due to channel wall contact of the core fluid occurs. In addition, since the flow rate of the core fluid and the cladding fluid is not so large, the difference in refractive index between the core fluid and the cladding fluid is drastically reduced by molecular diffusion or thermal diffusion reaction, resulting in a short optical wave guide device path. In general, since the density of the core fluid is large compared to the density of the cladding fluid, it has been pointed out that the slowing of the core fluid to the bottom of the microchannel due to the slow flow rate is a problem.

The present invention has been made to solve the above problems, in accordance with an embodiment of the present invention, to provide a three-dimensional liquid-core / liquid-cladding optical wave guide device that supplements the disadvantages of the existing methods mentioned above Done.

Currently manufactured microchannels are made mainly through the soft lithography process used in the semiconductor process. Therefore, the use of multiple layers increases the complexity of the process and increases the manufacturing cost. However, the three-dimensional liquid core / liquid cladding optical wave guide device according to an embodiment of the present invention employs a hydrodynamic focusing method of focusing a fluid three-dimensionally using a single layer using a simple shape.

The present invention overcomes the problem of lack of flexibility in solid core / solid cladding by applying a liquid core / liquid cladding optical wave guide. In addition, the present invention is applied to the three-dimensional liquid core / liquid cladding optical wave guide, thereby blocking the vertical optical loss to the channel wall, which is a problem of the two-dimensional optical wave guide technology. In addition, according to one embodiment of the present invention, it is possible to realize a high flow rate, thereby preventing the molecular diffusion of the liquid core according to the slow flow rate, which is a problem of the conventional three-dimensional optical wave guide. In addition, the realization of a high flow rate can prevent the sinking phenomenon to provide an increased path.

Other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments in conjunction with the accompanying drawings.

An object of the present invention is a micro-channel conduit 10, which is a passage through which microfluids can flow, and has a curved conduit 110 bent at a predetermined bending angle θ ₁ to form a vortex in the microfluid; A first cladding fluid input unit 30 connected to one end of the micro channel conduit 10 to which the first cladding fluid is injected; A core fluid input part 20 which is connected to the first cladding fluid input part 30 at one end thereof and is connected with a predetermined input angle θ ₂ so that the core fluid is injected along the flow direction of the first cladding fluid; A pair in which the second cladding fluid is introduced into both transverse sides of the microchannel conduit 10 for transverse focusing of the core fluid at an end of the curved tube 110 in which the core fluid is focused in the longitudinal direction based on the Dean vortex. Second cladding fluid inputs 40, 41; A micro fluid discharge part 50 connected to the other end of the micro channel conduit 10 to discharge the first and second cladding fluids and the core fluid; And an optical fiber 60 coupled to one side of the core fluid input unit 20 to output light irradiated from a predetermined light source 62 into the core fluid. 3D liquid core and liquid in a microchannel, comprising: It can be achieved as an optical wave guide device using cladding.

The bending angle θ ₁ may be 90 degrees.

The micro channel conduit 10, the first cladding fluid inlet 30, the core fluid inlet 20, the pair of second cladding fluid inlets 40, 41 and the microfluidic outlet 50 are a single layer. It may be characterized in that formed on.

The microchannel conduit 10, the first cladding fluid input 30, the core fluid input 20, and the pair of second cladding fluid inputs 40, 41 may be formed by a soft lithography process. have.

The first cladding fluid and the second cladding fluid may be characterized in that the liquid having the same refractive index.

The waveguide numerical aperture formed of the first and second cladding fluids and the core fluid is expressed by the following equation.

(NA is a numerical aperture, n _core is the refractive index of the core fluid, n _cladding is the refractive index of the first, second cladding fluid).

The light source 62 may be a laser light source 62.

The laser light source 62 may be Nd: YAG laser.

Dean vortex strength is given by

및

And

Re is the Reynolds number, ρ is the density of the liquid, V is the flow rate, D is the hydraulic diameter, μ is the viscosity of the liquid, R is the average rotational curvature of the elbow 110, and Dn is the Dean number. It can be characterized by the)).

The core fluid may be characterized in that the fluid width is adjusted by the flow rate of the second cladding fluid.

The adjusted fluid width is

및

And

(M is the number of modes of light, V is the parameter, a is the width of the core fluid, λ ₀ is the wavelength of light in free space, NA is the numerical aperture) You can do

As another category, an object of the present invention is to provide a micro-accommodator for the first cladding fluid input part 30 and the core fluid input part 20 in which the first cladding fluid and the core fluid form a predetermined input angle θ _{2 with} each other. Inputting to one end of the channel conduit 10 (S110); Light is irradiated from the predetermined light source 62 and outputted into the core fluid through the optical fiber 60 coupled to one side of the core fluid input unit 20 (S120); The first focusing step S130 in which the light is focused in the longitudinal direction based on the Dean vortices of the first cladding fluid and the core fluid formed along the curved pipe 110 bent at a predetermined bending angle θ ₁ inside the micro channel conduit 10. ; The second focusing light is focused laterally by the second cladding fluid introduced along the pair of second cladding fluid inputs 40 and 41 formed in the transverse direction at the end of the curved tube 110 where the longitudinal focusing ends. Step S140; And the light is discharged to the outside along the micro fluid discharge part 50 connected to the other end of the micro channel conduit 10 to discharge the core fluid and the first and second cladding fluids (S150). It can be achieved by the optical wave guide method using a three-dimensional liquid core and liquid cladding in the microchannel.

In the first focusing step S130 of light, the bending angle θ ₁ may be 90 degrees.

The second focusing step S140 of light may be characterized in that the light is focused in the lateral direction by the amount of fluid in the second cladding fluid.

Emission of the light (S150) may be characterized in that the step of emitting to the analysis means for analyzing a predetermined chemical component by the light or the display means displayed by the light.

According to one embodiment of the present invention, it has an effect that can overcome the problem of the lack of flexibility of the solid core / solid cladding. In addition, in one embodiment of the present invention by applying a three-dimensional liquid core / liquid cladding optical wave guide, it has the effect of blocking the vertical optical loss to the channel wall, which is a problem of the two-dimensional optical wave guide technology.

In addition, according to one embodiment of the present invention, it is possible to realize a high flow rate, has the advantage of preventing the molecular diffusion of the liquid core according to the slow flow rate which is a problem of the conventional three-dimensional optical wave guide. In addition, it is possible to prevent the sinking phenomenon by the realization of a high flow rate has the effect that can be used in an increased path.

The present invention relates to a three-dimensional liquid-core / liquid-cladding optical waveguide device using Dean vortices in a microchannel. In the midst of research on the device, the three-dimensional liquid-core / liquid cladding optical wave guide system proposed in the present invention can be used for on-chip devices such as medical diagnosis, chemical composition analysis, real-time environmental monitoring, and chemical weapon detection. When applied to development, it can be applied as a light source or a light source transfer device in a micro device. In addition, the active control of the refractive index of the core fluid has the advantage that it can be applied to a small display device.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it will be readily apparent to those skilled in the art that various other modifications and variations are possible without departing from the spirit and scope of the present invention. Are all within the scope of the appended claims.

1 is a block diagram showing the configuration of an embodiment according to the present invention optical wave guide device,
2 is a view showing a photomask design of an embodiment according to the present invention optical wave guide device,
3 is a cross-sectional view of Dean vortices formed in the first cladding fluid input unit 30, the core fluid input unit 20, the curved tube 110, and the curved tube 110 in one embodiment according to the optical wave guide device according to the present invention. drawing,
4 is a cross-sectional view showing cross sections of light focused in the transverse direction with a second cladding fluid input unit according to an embodiment of the present invention, an optical wave guide device;
5 is a planar photograph showing a guiding plane of a laser beam according to an embodiment of the present invention an optical wave guide device;
Figure 6 is a side view showing the guiding side of the laser light through an embodiment according to the present invention optical wave guide device,
7A to 7C are front views of the light emitted to the microfluidic discharge part 50 to indicate the degree of width control of the core fluid according to the flow rate control of the second cladding fluid using an embodiment according to the optical waveguide device of the present invention. Photos,
8 is a flowchart sequentially showing an embodiment according to the optical wave guide method of the present invention.

With reference to the accompanying drawings will be described in detail a preferred embodiment that can be easily implemented by those skilled in the art to which the present invention pertains. However, in describing in detail the operating principle of the preferred embodiment of the present invention, if it is determined that the detailed description of the related known functions or configurations may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

In addition, the same reference numerals are used for parts having similar functions and functions throughout the drawings. Throughout the specification, when a part is 'connected' to another part, this includes not only 'directly connected' but also 'indirectly connected' with another element in between. do. In addition, "including" any component does not exclude other components unless specifically stated otherwise, it means that may further include other components.

< Optical  Wave Guide Device Configuration and Operation>

1 is a block diagram showing the configuration of an embodiment according to the optical wave guide device of the present invention. As shown in FIG. 1, the optical wave guide device includes a core fluid inlet 20, a first cladding fluid inlet 30, a micro channel conduit 10, and a second cladding fluid inlet 40, 41. ), A microfluidic discharge part 50, a light source 62, and an optical fiber 60.

As shown in FIG. 1, the dotted arrow direction indicates the flow of light and the solid arrow indicates the flow of the fluid. Fluid flow causes the core fluid inlet 20 to inject the core fluid into the microchannel conduit 10 and the first cladding fluid inlet 30 to inject the first cladding fluid into the microchannel conduit 10. do. The curved pipe 110 provided in the micro channel pipe 1 is formed to be bent with a predetermined bending angle θ1. Due to the curved curved tube 11 shape, eddy vortices are generated in the microchannel conduit 10 to focus the core fluid in the longitudinal direction. That is, the bending angle θ1 is an angle formed between the direction in which the first cladding fluid is injected and the direction in which the fluid is discharged from the fluid discharge part 5. This bending angle θ1 is 90 °.

Then, the second cladding fluid inlet 30 is provided on each side of both sides of the microchannel conduit 10 in the transverse direction. The second cladding fluid is introduced into the micro channel conduit 10 by the second cladding fluid inlets 40 and 41. The introduction of the second cladding fluid causes the core fluid to be concentrated in the transverse direction to form a three-dimensional optical wave guide. In addition, the micro fluid discharge part 50 is provided at the end of the micro channel conduit 10. Therefore, the microfluid made of the core fluid and the cladding fluid flowing in the microchannel conduit 10 is discharged by the microfluidic discharge part 50.

The flow of light is the light generated from the light source 62 is transferred by the optical fiber 60, the light totally reflected by the optical fiber 60 is transferred along the core fluid path focused on the micro channel conduit 10. . This fluid core / fluid cladding three-dimensional optical guide device is formed of a single layer.

Figure 2 shows a schematic cross-sectional view (photomask design) showing the direction and position of the fluid injection in the three-dimensional optical wave guide device according to an embodiment of the present invention. As shown in FIG. 2, light is transmitted along the optical fiber 60 and injected into the core fluid inlet 20. In addition, the core fluid inlet 20 is connected to the microchannel conduit 10 so that the core fluid flowing in the core fluid inlet 20 is introduced into the microchannel conduit 10. Then, the first cladding fluid inlet 30 is connected at the position where the core fluid is injected, so that the first cladding fluid in the first cladding fluid inlet 30 is introduced into the micro channel conduit 10.

As shown in FIG. 2, the first cladding fluid inlet 30 and the core fluid inlet 20 are combined to form an inlet angle θ2 at one end of the microchannel conduit 10. The angle between the inflow direction of the core fluid flowing into the conduit 10 and the inflow direction of the first cladding fluid is the input angle θ2. In addition, the core fluid and the first cladding fluid are introduced into the microchannel conduit 10, and as shown in FIG. 2, the microchannel conduit 10 is bent at a bending angle θ1. As described above, the vortex is formed in the microchannel conduit 10, and the core fluid is focused in the longitudinal direction by the Dean vortex.

As shown in FIG. 2, it can be seen that the second cladding fluid inlets 40 and 41 are connected to both sides of the micro channel conduit 10. Therefore, the second cladding fluid is introduced into the micro channel conduit 10 by the second cladding fluid inlets 40 and 41 into the micro channel conduit 10, and the core fluid is focused in the transverse direction. The bending angle θ1 of the curved pipe 110 provided in the micro channel pipe 10 is about 90 °.

3 is a perspective view of the coupling portion of the core fluid inlet 20, the first cladding fluid inlet 30 and the micro channel conduit 10 for longitudinal focusing of the core fluid in accordance with one embodiment of the present invention. It is. As shown in FIG. 3, it can be seen that the core fluid in the micro channel conduit 10 is concentrated in the longitudinal direction by a Dean vortex phenomenon.

As shown in FIG. 3, when the core fluid proceeds out along the microchannel conduit 10 bent at the bending angle θ 1, the inner side of the curved conduit 110 at the central portion of the conduit 10 by centrifugal force and wall effect. A pair of outward vortices will occur. By using the vortex so that the core fluid is located in the inner portion of the micro-channel conduit 10, when the first cladding fluid is introduced, the core fluid is focused in the longitudinal direction while passing through the curved pipe 110 bent at 90 degrees.

The strength of the Dean vortex is determined by two dimensionless numbers, the two dimensionless numbers being Reynolds number (Re) and Dean number (Dn). Reynolds number is defined by Equation 2 below, and Dean number is defined by Equation 3 below.

는 액체의 밀도, V는 액체의 유속, D는 수력학적 지름,

는 액체의 점성 계수, R은 곡관(110)의 평균 회전 곡률을 나타낸다. here,

Is the density of the liquid, V is the flow velocity of the liquid, D is the hydraulic diameter,

Is the viscosity coefficient of the liquid, R is the average rotational curvature of the curved tube (110).

4 is a partial perspective view of a second cladding fluid input 40 and 41 and a micro channel conduit 10 for lateral focusing in a three-dimensional liquid core / liquid cladding optical wave guide device according to an embodiment of the present invention. It is shown. As shown in FIG. 4, second cladding fluid inlets 40, 41 are connected to both sides of the micro channel conduit 10. Then, the second cladding fluid is introduced into the micro channel conduit 10 at each of the second cladding fluid inlets 40 and 41.

Accordingly, the core fluid focused in the longitudinal direction is focused to the center portion of the micro channel conduit 10 by the second cladding fluid wrapping in both the transverse directions to form a three-dimensional optical wave guide.

FIG. 5 is a plan view illustrating a result of guiding an Nd: YAG laser having a wavelength of 532 nm using a three-dimensional liquid core / liquid cladding optical wave guide according to an embodiment of the present invention. As shown in FIG. 5, it can be seen that the laser is stably guided along the core fluid. Therefore, a high flow rate can be realized, and the diffusion reaction can be prevented so that a long wave guide path can be obtained.

FIG. 6 is a side view illustrating a result of guiding light of the light source 62 using a three-dimensional liquid-core / liquid-cladding optical wave guide according to an embodiment of the present invention. As shown in Figure 6, it can be seen that the light is stably guided along the long guide path. In addition, in the conventional two-dimensional liquid-core / liquid-cladding optical wave guide, the problem that the dense core fluid sinks to the bottom of the channel due to the slow flow rate is solved due to the fast flow rate.

7A to 7C are cross-sectional views illustrating the results of guiding the light of the light source 62 using the three-dimensional liquid-core / liquid-cladding optical wave guide according to one embodiment of the present invention. 7A to 7C, the flow rate of the second cladding fluid introduced from the second cladding fluid inlets 40 and 41 is increased. It can be seen that the width of the guided core fluid decreases as the flow rate of the second cladding fluid introduced from the second cladding fluid inlets 40 and 41 increases. That is, the width of the core fluid shown in FIG. 7B is reduced than the width of the core fluid shown in FIG. 7A, and the width of the core fluid shown in FIG. 7C is further reduced than the width of the core fluid shown in FIG. 7B. have.

In addition, in the optical wave guide according to an embodiment of the present invention, the width of the core fluid determines the mode number of the guided light. Light propagates in the form of overlapping modes, and the adjustment of the number of modes has various applications. That is, the width of the core fluid can be adjusted by the amount of the injected second cladding fluid, and the number of modes of light can be adjusted by adjusting the width of the core fluid. The number of modes of the guided light can be calculated by the following equation (4).

Where M represents the number of modes of the light to be guided, and V is defined by the following equation (5) as a parameter.

는 자유 공간에서의 광의 파장, NA는 개구수이다. 따라서, 본 발명의 일실시예에 따른 3차원 액체-코어/액체-클래딩 옵티컬 웨이브 가이드 장치는 적은 샘플을 사용하여 화학적 분석 모니터링, 의료 진단 등이 가능한 마이크로 스케일에서의 장치에 대한 연구에 적용가능하다. 또한, 본 발명의 일실시예에 따른 3차원적 액체-코어/액체-클래딩 옵티컬 웨이브 가이드 장치를 의료 진단, 화학 성분 분석, 실시간 환경 모니터링, 화학 무기 탐지 등의 온-칩(on-chip) 장치 개발에 적용하면 마이크로 디바이스에서의 광원(62) 또는 광원(62) 이송장치로 적용 가능하다. 또한 코어 유체의 굴절률을 능동적으로 조절해 주면 초소형 디스플레이 장치에 응용 가능하다.
Where a is the width of the core fluid,

Is the wavelength of light in free space, NA is the numerical aperture. Accordingly, the three-dimensional liquid-core / liquid-cladding optical waveguide device according to one embodiment of the present invention is applicable to the study of the device at the microscale, which enables chemical analysis monitoring, medical diagnosis, etc. using a small sample. . In addition, the three-dimensional liquid-core / liquid-cladding optical wave guide device according to an embodiment of the present invention on-chip (medical diagnostics, chemical composition analysis, real-time environmental monitoring, chemical weapon detection, etc.) Application to the development can be applied as a light source 62 or a light source 62 transfer device in a micro device. In addition, by actively adjusting the refractive index of the core fluid, it can be applied to a micro display device.

<Of the present invention Example  According Optical  Wave Guide Method>

Hereinafter will be described an optical wave guide method according to an embodiment of the present invention. The optical wave guide method of the present invention uses the three-dimensional fluid core / fluid cladding optical wave guide apparatus described above. First, FIG. 8 illustrates a flowchart of a guide method using a 3D fluid core / fluid cladding optical guide device according to an embodiment of the present invention.

The first cladding fluid flowing in the first cladding fluid inlet 30 and the core fluid flowing in the core fluid inlet 20 are introduced into one end of the micro channel conduit 10 (S110). As described above, the core fluid inlet 20 and the first cladding fluid inlet 30 are connected to one end of the micro channel conduit 10. The core fluid inlet 20 and the first cladding fluid inlet 30 form a predetermined inlet angle θ _{2 and are} connected to the micro channel conduit 10.

The light is irradiated from the light source 62 to be output into the core fluid through the optical fiber 60 coupled to one side of the core fluid inlet 20 (S120). In addition, the core fluid is focused in the longitudinal direction based on the vortices that are bent along the curved pipe 110 bent at a predetermined bending angle θ ₁ inside the micro channel pipeline 10. Light is guided along the longitudinally focused core fluid. As described above, the bending angle θ1 is formed at about 90 degrees.

Then, the core fluid is focused in the lateral direction (S140). That is, the second cladding fluid is introduced along the second cladding fluid inlets 40 and 41 formed at both sides of the curved pipe 110 where the longitudinal focusing of the core fluid ends. The core fluid is then focused in the transverse direction by the injected second cladding fluid. In addition, as described above, the width of the core fluid focused in the transverse direction is inversely proportional to the inflow amount of the second cladding. The number of modes of light is determined by the width of the core fluid. Thus, the light is guided along the core fluid focused in the transverse direction.

Light continues to be guided along the core fluid focused in the longitudinal and transverse directions. The light is guided along the core fluid until the fluid outlet 50 is connected to the end of the micro channel conduit 10, and the core fluid and the first cladding fluid and the second cladding fluid are directed to the fluid outlet 50. It is discharged to the outside (S150).

In addition, analysis means for analyzing a predetermined chemical component by light guided along the core fluid or display means displayed by light may be connected to the fluid discharge part 50. Therefore, the optical wave guide method according to an embodiment of the present invention can transmit light to the analysis means and the display means while reducing energy loss.

The chemical analysis is made by the light source when the chemical component is injected through the core fluid, thereby enabling the analysis of the chemical component. Therefore, by providing an analysis means in the fluid outlet 50, the in-situ analysis along the core fluid with chemical analysis is possible.

θ ₁ : bending angle
θ ₂ : closing angle
10: micro channel pipeline
20: core fluid input
30: first cladding fluid input
40, 41: pair of second cladding fluid inputs
50: micro fluid outlet
60: optical fiber
62: light source
110: elbow

Claims (15)

A microchannel conduit (10) which is a passage through which the microfluid can flow, and has a curved conduit (110) bent at a predetermined bending angle (θ ₁ ) to form a vortex ed in the microfluid;
A first cladding fluid input unit 30 connected to one end of the micro channel conduit 10 to which a first cladding fluid is injected;
A core fluid inlet 20 configured to be connected to the first cladding fluid inlet 30 and a predetermined inlet angle θ ₂ so that a core fluid is introduced along a flow direction of the first cladding fluid;
A second cladding on both transverse sides of the microchannel conduit 10 for transverse focusing of the core fluid at an end of the curved tube 110 in which the core fluid is focused longitudinally based on the Dean vortex A pair of second cladding fluid inlets 40 and 41 into which fluid is introduced;
A micro fluid discharge part 50 connected to the other end of the micro channel conduit 10 to discharge the first and second cladding fluids and the core fluid; And
And a optical fiber 60 coupled to one side of the core fluid inlet 20 to output light irradiated from a predetermined light source 62 into the core fluid. Optical waveguide device using liquid cladding. The method of claim 1,
Optical wave guide device using a three-dimensional liquid core and liquid cladding in the micro-channel, characterized in that the bending angle (θ ₁ ) is 90 degrees. The method of claim 1,
The micro channel conduit 10, the first cladding fluid inlet 30, the core fluid inlet 20, the pair of second cladding fluid inlet (40, 41) and the micro fluid outlet ( 50) is an optical wave guide device using a three-dimensional liquid core and liquid cladding in a microchannel, characterized in that formed in a single layer. The method of claim 1,
The micro channel conduit 10, the first cladding fluid inlet 30, the core fluid inlet 20, and the pair of second cladding fluid inlets 40, 41 are formed by a soft lithography process. An optical wave guide device using a three-dimensional liquid core and liquid cladding in a microchannel. The method of claim 1,
And the first cladding fluid and the second cladding fluid are liquids having the same refractive index. 3. An optical wave guide device using a liquid cladding and a three-dimensional liquid core in a microchannel. 6. The method of claim 5,
The waveguide numerical aperture formed of the first and second cladding fluids and the core fluid is represented by the following equation.

(NA is the numerical aperture, n _core is the refractive index of the core fluid, n _cladding is the refractive index of the first, second cladding fluid)
Optical wave guide device using a three-dimensional liquid core and liquid cladding in a microchannel, characterized in that determined by. Claim 7 was abandoned upon payment of a set-up fee. The method of claim 1,
Optical wave guide device using a three-dimensional liquid core and liquid cladding in a microchannel, characterized in that the light source (62) is a laser light source (62). Claim 8 was abandoned when the registration fee was paid. The method of claim 7, wherein
The optical waveguide device using a three-dimensional liquid core and liquid cladding in a microchannel, characterized in that the laser light source 62 is a Nd: YAG laser. The method of claim 1,
The strength of the Dean vortex is

And

Re is the Reynolds number, ρ is the density of the liquid, V is the flow rate, D is the hydraulic diameter, μ is the viscosity of the liquid, R is the average rotational curvature of the elbow 110, and Dn is the Dean number. ) Im)
Optical wave guide device using a three-dimensional liquid core and liquid cladding in a microchannel, characterized in that determined by. The method of claim 1,
And wherein the core fluid has a fluid width controlled by a flow rate of the second cladding fluid. An optical wave guide device using a liquid cladding and a three-dimensional liquid core in a microchannel. The method of claim 10,
The adjusted fluid width is

And

(M is the number of modes of light, V is the parameter, a is the width of the core fluid, λ ₀ is the wavelength of light in free space, NA is the numerical aperture)
Optical wave guide device using a three-dimensional liquid core and liquid cladding in a microchannel, characterized in that for adjusting the number of wave guide mode of the light determined by. Claim 12 was abandoned upon payment of a registration fee. The first cladding fluid and the core fluid are introduced into one end of the microchannel conduit 10 along each of the first cladding fluid inlet 30 and the core fluid inlet 20, which form a predetermined input angle θ ₂ . (S110);
Light is irradiated from a predetermined light source (62) and outputted into the core fluid through an optical fiber (60) coupled to one side of the core fluid inlet (20) (S120);
A first focusing light focused longitudinally based on a Dean vortex of the first cladding fluid and the core fluid formed along the curved pipe 110 bent at a predetermined bending angle θ ₁ inside the microchannel conduit 10 Step S130;
The light is focused in the lateral direction by a second cladding fluid introduced along a pair of second cladding fluid inlets 40 and 41 formed transversely at the end of the curved tube 110 where the longitudinal focusing ends. A second focusing step (S140); And
The light is connected to the other end of the micro channel conduit 10 to be discharged to the outside along the micro fluid discharge part 50 for discharging the core fluid and the first and second cladding fluids (S150); An optical wave guide method using a three-dimensional liquid core and a liquid cladding in a microchannel. Claim 13 was abandoned upon payment of a registration fee. The method of claim 12,
In the first focusing step (S130) of the light,
The bending angle θ ₁ is an optical wave guide method using a three-dimensional liquid core and a liquid cladding in a microchannel. Claim 14 was abandoned when the registration fee was paid. The method of claim 12,
The second focusing step (S140) of the light,
And the light is focused in the lateral direction by the amount of fluid in the second cladding fluid. 3. The optical wave guide method using a three-dimensional liquid core and liquid cladding in a microchannel. Claim 15 was abandoned upon payment of a registration fee. The method of claim 12,
Discharge step (S150) of the light,
The optical wave guide method using the three-dimensional liquid core and the liquid cladding in the micro-channel, characterized in that the step of emitting to the analysis means for analyzing a predetermined chemical component by the light or the display means displayed by the light.

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