Micro-fluidic chip, micro-fluidic test system and micro-fluidic test method
A microfluidic chip and fluid technology, which is applied in the field of microfluidics, can solve the problems of small fiber diameter, low detection resolution and recognition rate, and low definition, and achieve the effects of large bandwidth, improved efficiency, and stable optical path
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Embodiment 1
[0028] figure 1 It is a structural schematic diagram of the microfluidic chip provided in Embodiment 1 of the present invention.
[0029] Such as figure 1 As shown, this embodiment includes:
[0030] A microfluidic chip, comprising: a sequentially connected sampling channel 11, an optical fiber channel 12, and a sampling channel 13, the optical fiber channel 12 is connected between the sampling channel 11 and the sampling channel 13, and the upper part of the sampling channel 11 is set There is at least one sample inlet, the sample outlet channel 13 is provided with a sample outlet, the optical fiber channel 12 is provided with a tapered optical fiber 16, and the sample inlet is used to introduce fluid into the optical fiber channel 12 so that the fluid contacts with the tapered optical fiber 16, the tapered optical fiber Shaped optical fiber 16 includes a tapered region and a pigtail; the tapered region is inscribed with a fiber grating, the length of the tapered region of ...
Embodiment 2
[0039] figure 2 It is a schematic structural diagram of the microfluidic testing system provided in Example 2, such as figure 2 As shown, it includes: a measuring device and a microfluidic chip assembly 21, the microfluidic chip assembly 21 includes a fixing assembly and at least one microfluidic chip 211, the fixing assembly is used to fix a plurality of microfluidic chips 211, the microfluidic The control chip 211 can be any one of the microfluidic chips in the first embodiment. figure 2 In the above, four microfluidic chips 211 are taken as an example, but the embodiment of the present application does not limit the number of microfluidic chips. The measuring device comprises a light source 22, a wavelength division multiplexer 23, at least one optical fiber circulator 24 and an optical measuring instrument 25, the light source 22 provides a broadband light source for the wavelength division multiplexer 23, and the first end of each optical fiber circulator 24 is connec...
Embodiment 3
[0048] Figure 4 It is a structural schematic diagram of the microfluidic testing method, such as Figure 4 As shown, this embodiment includes:
[0049] S311. Separate the broadband light source into optical signals with preset wavelengths. The optical signals are transmitted to the microfluidic chip through the optical fiber circulator, and a tapered optical fiber is arranged in the microfluidic chip.
[0050] S312. The optical signal is injected into the fluid to be detected through the tail fiber of the tapered optical fiber, and the optical fiber grating is engraved on the tapered optical fiber.
[0051] S313. The optical signal is reflected by the optical fiber grating to obtain a reflected optical signal.
[0052] S314. The reflected light signal exits the tapered optical fiber through the tail fiber of the tapered optical fiber, and is transmitted to the optical measuring instrument through the optical fiber circulator for observation.
[0053] Further, the microflui...
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Abstract
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