Photonic integrated device, wearable temperature measuring device, fluorescence temperature measuring method and electronic equipment

Abstract

The invention relates to the field of optical devices, and provides a photonic integrated device, a wearable temperature measuring device, a fluorescence temperature measuring method and electronic equipment, the photonic integrated device comprises a wavelength division multiplexer, a multimode interference coupler and a spot-size converter, and light beams are transmitted among the wavelength division multiplexer, the multimode interference coupler and the spot-size converter through waveguides; a second end of the wavelength division multiplexer is used for inputting a light beam of a first wavelength, a third section of the wavelength division multiplexer is used for outputting a light beam of a second wavelength, and the light beam of the second wavelength carries temperature data; the second end of the spot-size converter is used for outputting the light beam of the first wavelength and inputting the light beam of the second wavelength. The wearable measuring system is used for overcoming the defects that the system is complex, large in size and not portable enough when light beams are transmitted through optical fibers for temperature measurement, the light beams are output and received in a waveguide mode, the complexity of the wearable measuring system is reduced, and the portable degree is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of optical devices, and in particular to a photonic integrated device, a wearable temperature measuring device, a fluorescence temperature measuring method, and an electronic device. Background Art

[0002] Wearable measurement technology refers to wearing portable measuring devices on the body, sensing and recording various physiological characteristics and parameters of organisms through built-in or external sensors, and conveniently completing the health measurement of organisms. Common wearable measurement devices include smart bracelets, etc.

[0003] Wearable measurement technology can be applied to the measurement of biological body temperature. At present, when wearable measurement technology is used for temperature measurement in related technologies, most of them choose optical temperature measurement. Compared with traditional contact temperature measurement methods, optical temperature measurement has the advantages of high sensitivity, fast response speed, and anti-electromagnetic interference. However, the existing optical temperature measurement implementation method generally uses electronic devices to emit lasers to irradiate the skin, and demodulates the body temperature signal by receiving different representations of the laser reflected back through the skin. This method is generally used in wearable bracelets. This method requires the bracelet to be close to the skin and remain stable during measurement, otherwise it will affect the accuracy of the measurement results, and it is necessary to wear an additional rigid bracelet, which is not comfortable and convenient. Another temperature measurement method using optical fiber is mostly used in petroleum and coal mining projects. The measurement system is relatively complex, large in size, and not portable enough. Summary of the invention

[0004] The present invention provides a photonic integrated device and a wearable temperature measuring device, a fluorescence temperature measuring method, and an electronic device, which are used to solve the problems of poor stability, low comfort, loose fit with the human body, low portability, and high complexity of the sensing system in the existing wearable measurement technology field. In the solution of the present application, a micron-level flexible photonic integrated device is designed for wearable temperature measurement, which outputs and receives light beams in a waveguide manner, reduces the complexity of the wearable measurement system, and improves portability.

[0005] The present invention provides a photonic integrated device, comprising:

[0006] A wavelength division multiplexer, a multimode interference coupler and a spot converter, wherein the wavelength division multiplexer, the multimode interference coupler and the spot converter are prepared using waveguides, and the material of the waveguides meets the transmission requirements of the light beam;

[0007] The first end of the wavelength division multiplexer is connected to the first end of the multimode interference coupler;

[0008] The second end of the multimode interference coupler is connected to the first end of the mode spot converter;

[0009] The second end of the wavelength division multiplexer is used to input a light beam of a first wavelength, and the third end of the wavelength division multiplexer is used to output a light beam of a second wavelength, wherein the light beam of the second wavelength carries temperature data;

[0010] The second end of the pattern spot converter is used to output a light beam of a first wavelength and to input a light beam of a second wavelength;

[0011] The size of the connection part between the wavelength division multiplexer, the multimode interference coupler and the spot size converter satisfies the single-mode transmission of the light beam of the first wavelength and the light beam of the second wavelength;

[0012] The wavelength division multiplexer is used to filter and split the light beam of the first wavelength and the light beam of the second wavelength, and the structural parameters of the wavelength division multiplexer are adapted to the light beam of the first wavelength and the light beam of the second wavelength;

[0013] The multimode interference coupler is used to split and collect the light beam of the first wavelength and the light beam of the second wavelength, and the structural parameters of the multimode interference coupler are adapted to the light beam of the first wavelength and the light beam of the second wavelength;

[0014] The pattern spot converter is used to increase the divergence angle of the first wavelength light and to increase the collection surface of the second wavelength light. The structural parameters of the pattern spot converter are adapted to the light beam of the first wavelength and the light beam of the second wavelength.

[0015] According to the photonic integrated device provided by the present invention, the first end of the multimode interference coupler includes an interface;

[0016] The second end of the multimode interference coupler includes at least two interfaces.

[0017] According to the photonic integrated device provided by the present invention, the number of interfaces at the first end of the pattern spot converter is consistent with the number of interfaces at the second end of the multimode interference coupler;

[0018] The number of interfaces at the second end of the pattern spot converter is consistent with the number of interfaces at the first end of the pattern spot converter.

[0019] According to the photonic integrated device provided by the present invention, the first end of the multimode interference coupler is a straight waveguide;

[0020] The second end of the multimode interference coupler is a tapered waveguide;

[0021] A rectangular waveguide is further provided between the first end and the second end of the multimode interference coupler, and the rectangular waveguide is used to evenly divide the light beam of the first wavelength input from the first end into a plurality of light beams and output them from the second end of the multimode interference coupler;

[0022] The rectangular waveguide is also used to collect a light beam of a second wavelength input from the second end and output the light beam from the first end of the multi-mode interference coupler.

[0023] According to the photonic integrated device provided by the present invention, the pattern spot converter includes a straight waveguide and a tapered waveguide;

[0024] The mode spot converter is connected to the second end of the multimode interference coupler through a straight waveguide;

[0025] The straight waveguide of the pattern spot converter is connected to the first end of the tapered waveguide, and the cross-sectional area of ​​the second end of the tapered waveguide of the pattern spot converter is larger than the cross-sectional area of ​​the first end.

[0026] According to the photonic integrated device provided by the present invention, the wavelength division multiplexer comprises a tapered waveguide;

[0027] The wavelength division multiplexer is connected to the straight waveguide of the multimode interference coupler through a tapered waveguide.

[0028] The photonic integrated device provided by the present invention comprises a packaging layer, a waveguide layer and a substrate layer;

[0029] The waveguide layer and the substrate layer are made of flexible materials to enhance the flexibility and conformability of the photonic integrated device;

[0030] The waveguide layer is located between the packaging layer and the substrate layer, and the waveguide layer includes the wavelength division multiplexer, the multimode interference coupler and the mode spot converter.

[0031] The present invention also provides a wearable temperature measuring device, comprising any one of the above-mentioned photonic integrated devices.

[0032] The present invention also provides a fluorescence temperature measurement method, which is implemented by the above-mentioned wearable temperature measurement device, comprising:

[0033] Outputting a light beam of a first wavelength through a photonic integrated device, and collecting a light beam of a second wavelength through the photonic integrated device, wherein the light beam of the second wavelength is generated after the light beam of the first wavelength is irradiated onto a fluorescent substance, and the fluorescent substance is arranged on a second end surface of a pattern spot converter of the photonic integrated device;

[0034] The temperature value of the object to be measured is determined by the fluorescence decay lifetime of the light beam of the second wavelength.

[0035] The present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, any one of the above-mentioned fluorescence temperature measurement methods is implemented.

[0036] The present invention also provides a non-transitory computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, any of the above-mentioned fluorescence temperature measurement methods is implemented.

[0037] The present invention also provides a computer program product, including a computer program, and when the computer program is executed by a processor, any of the above-mentioned fluorescence temperature measurement methods is implemented.

[0038] The photonic integrated device provided by the present invention can complete the light beam transmission through the waveguide device, and can achieve higher temperature sensing accuracy with lower complexity compared with optical fiber transmission. The wavelength division multiplexer in the photonic integrated device includes three ports, wherein the light beam inputted from the second port is outputted to the multimode interference coupler through the first port, and is outputted to the spot converter through the multimode interference coupler. After being outputted from the spot converter, the light beam of the first wavelength can contact the object to be measured, and is collected by the spot converter again to form a light beam of the second wavelength. After the light beam of the second wavelength passes through the spot converter and the multimode interference coupler in sequence, it is outputted from the wavelength division multiplexer. The third end outputs the second wavelength light beam which carries the temperature information of the object to be measured, which can be used for subsequent processing to determine the temperature value of the object to be measured. The transmission of the dual-band light beam is realized through the waveguide, and the temperature sensing based on fluorescence is realized through the micron-level flexible photonic integrated device. While ensuring the temperature measurement sensitivity, the size of the device is greatly reduced, making it easier to combine with clothing, etc., to achieve a close fit with the human body, greatly improving the comfort and stability; and the filtering branch output is realized in the device waveguide, and the structure is simple and the integration is high, which effectively reduces the overall complexity of the photonic integrated device and improves the portability. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0040] Figure 1 This is one of the structural schematic diagrams of the photonic integrated device provided by an embodiment of the present invention;

[0041] Figure 2 This is the second structural schematic diagram of the photonic integrated device provided by an embodiment of the present invention;

[0042] Figure 3 This is the third structural schematic diagram of the photonic integrated device provided by an embodiment of the present invention;

[0043] Figure 4 This is the fourth structural schematic diagram of the photonic integrated device provided by an embodiment of the present invention;

[0044] Figure 5 This is the fifth structural schematic diagram of the photonic integrated device provided by the embodiment of the present invention;

[0045] Figure 6 This is the sixth structural schematic diagram of the photonic integrated device provided by an embodiment of the present invention;

[0046] Figure 7 is a schematic structural diagram of a wearable temperature measuring device provided by an embodiment of the present invention;

[0047] Figure 8 1 is a flow chart of a fluorescence temperature measurement method provided by an embodiment of the present invention;

[0048] Fig. 9 It is a schematic diagram of the physical structure of an electronic device provided by an embodiment of the present invention.

[0049] in:

[0050] 1-Wavelength Division Multiplexer; 2-Multimode Interference Coupler; 3-Mode Spot Converter;

[0051] 4-a tapered waveguide of the wavelength division multiplexer; 5-a second end of the wavelength division multiplexer;

[0052] 6-the third end of the wavelength division multiplexer; 7-the straight waveguide of the multimode interference coupler;

[0053] 8- rectangular waveguide of multimode interference coupler; 9- tapered waveguide of multimode interference coupler;

[0054] 10-straight waveguide of the spot converter; 11-conical waveguide of the spot converter;

[0055] 12-substrate layer; 13-waveguide layer; 14-packaging layer; 15-photonic integrated device; 16-optical fiber; 17-demodulation module. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0057] Figure 1 This is one of the structural schematic diagrams of the photonic integrated device provided in the embodiment of the present invention.

[0058] Figure 2This is the second structural schematic diagram of the photonic integrated device provided in the embodiment of the present invention.

[0059] Figure 3 This is the third structural schematic diagram of the photonic integrated device provided in an embodiment of the present invention.

[0060] Figure 4 This is the fourth structural schematic diagram of the photonic integrated device provided in an embodiment of the present invention.

[0061] like Figure 1-Figure 4 As shown, this embodiment provides a photonic integrated device, including:

[0062] A wavelength division multiplexer 1, a multimode interference coupler 2 and a spot converter 3, wherein the wavelength division multiplexer 1, the multimode interference coupler 2 and the spot converter 3 are made of waveguides, and the material of the waveguides meets the transmission requirements of the light beam;

[0063] The first end of the wavelength division multiplexer is connected to the first end of the multimode interference coupler;

[0064] The second end of the multimode interference coupler is connected to the first end of the mode spot converter;

[0065] The second end 5 of the wavelength division multiplexer is used to input a light beam of a first wavelength, and the third section 6 of the wavelength division multiplexer is used to output a light beam of a second wavelength, wherein the light beam of the second wavelength carries temperature data;

[0066] The second end of the pattern spot converter is used to output a light beam of a first wavelength and to input a light beam of a second wavelength;

[0067] The size of the connection part between the wavelength division multiplexer, the multimode interference coupler and the spot size converter satisfies the single-mode transmission of the light beam of the first wavelength and the light beam of the second wavelength;

[0068] The wavelength division multiplexer is used to filter and split the light beam of the first wavelength and the light beam of the second wavelength, and the structural parameters of the wavelength division multiplexer are adapted to the light beam of the first wavelength and the light beam of the second wavelength;

[0069] The multimode interference coupler is used to split and collect the light beam of the first wavelength and the light beam of the second wavelength, and the structural parameters of the multimode interference coupler are adapted to the light beam of the first wavelength and the light beam of the second wavelength;

[0070] The pattern spot converter is used to increase the divergence angle of the first wavelength light and to increase the collection surface of the second wavelength light. The structural parameters of the pattern spot converter are adapted to the light beam of the first wavelength and the light beam of the second wavelength.

[0071] In practical applications, the light beam with the first wavelength may be a light beam with a wavelength of 395 nanometers, and the light beam with the second wavelength may be a light beam with a wavelength of 610 nanometers.

[0072] In implementation, the connecting parts between the wavelength division multiplexer, the multimode interference coupler and the mode spot converter can all be straight waveguides, and the width, height and other dimensions of the straight waveguides of the connecting parts can be specially designed for the first wavelength light beam and the second wavelength light beam, which can meet the requirements of single-mode low-loss transmission of the two specific wavelength light beams in the straight waveguide.

[0073] Furthermore, the various structural parameters of the wavelength division multiplexer can also be specially designed for the light beam of the first wavelength and the light beam of the second wavelength, and can play a better filtering and splitting function for the light beams of these two specific wavelengths; the various structural parameters of the interference area of ​​the multimode interference coupler and the position of the first end and the second end can be specially designed for the light beam of the first wavelength and the light beam of the second wavelength, so as to realize the splitting and collection of the light beams of the first wavelength and the second wavelength. For the mode spot converter, it can maximize the divergence angle of the light beam of the first wavelength to increase the contact area between the light beam of the first wavelength and the object to be measured, and achieve the maximum collection efficiency of the light beam of the second wavelength, while achieving the minimum transmission loss.

[0074] In the scheme of this embodiment, the photonic integrated device includes two light beam transmission directions. In the first transmission direction, the light beam of the first wavelength is input through the second end 5 of the wavelength division multiplexer, and is output from the second end of the wavelength division multiplexer after passing through the wavelength division multiplexer 1, the multimode interference coupler 2 and the spot converter 3 in sequence. In the second transmission direction, the light beam of the second wavelength carrying temperature data is input from the second end of the spot converter to the photonic integrated device, and then is output from the third end 6 of the wavelength division multiplexer after passing through the spot converter 3, the multimode interference coupler 2 and the wavelength division multiplexer 1 in sequence.

[0075] In the first transmission direction, this embodiment adopts wavelength division multiplexing technology to realize the different-port input of the first wavelength light beam, uses the principle of multi-mode interference to realize equal-power splitting of the input light, and outputs the light beam at the maximum diffusion angle; in the second transmission direction, the device parameters are optimized by using the principle of optical path reversibility and finite element analysis, so as to effectively collect the second wavelength light beam, and use the principle of wavelength division multiplexing technology to filter and split the first wavelength light beam, so as to realize the different-port output of the second wavelength light beam.

[0076] In order to solve the problem of splitting transmission of the first wavelength light beam and the second wavelength light beam, the solution of this embodiment is to form an interference area by using a trapezoidal waveguide with a narrow left and wide right width that does not match the width of the transmission straight waveguide, so that the second wavelength light beam in the second transmission direction is output along the arc waveguide, and the first wavelength light beam in the first transmission direction enters the transmission waveguide along the straight waveguide, thereby realizing the dual-band conduction branch transmission function and effectively improving the transmission efficiency and reducing the transmission loss.

[0077] The photonic integrated device provided in this embodiment can complete light beam transmission through a waveguide device, and can achieve higher temperature sensing accuracy with lower complexity compared to optical fiber transmission. The wavelength division multiplexer in the photonic integrated device includes three ports, wherein the light beam inputted from the second port is outputted to the multimode interference coupler through the first port, and is outputted to the spot converter via the multimode interference coupler. After being outputted from the spot converter, the light beam of the first wavelength can contact the object to be measured, and is collected by the spot converter again to form a light beam of the second wavelength. The light beam of the second wavelength then passes through the spot converter and the multimode interference coupler in sequence, and is outputted from the third end of the wavelength division multiplexer. The output light beam of the second wavelength carries the temperature information of the object to be measured, and the temperature information can be used for subsequent processing to determine the temperature value of the object to be measured. The transmission of dual-band light beams is realized through waveguides, and the structure is simple and the integration is high, which effectively reduces the overall complexity of the photonic integrated device.

[0078] Figure 3 One embodiment of a multimode interference coupler is illustrated.

[0079] like Figure 3 As shown, in the exemplary embodiment, the first end of the multimode interference coupler includes an interface;

[0080] The second end of the multimode interference coupler includes at least two interfaces.

[0081] In an exemplary embodiment, the first end of the multimode interference coupler is a straight waveguide;

[0082] The second end of the multimode interference coupler is a tapered waveguide;

[0083] A rectangular waveguide is further provided between the first end and the second end of the multimode interference coupler, and the rectangular waveguide is used to evenly divide the light beam of the first wavelength input from the first end into a plurality of light beams and output them from the second end of the multimode interference coupler;

[0084] The rectangular waveguide is also used to collect a light beam of a second wavelength input from the second end and output the light beam from the first end of the multi-mode interference coupler.

[0085] In practical applications, such as Figure 3As shown, in the multimode interference coupler, a rectangular waveguide whose width is much larger than the transmission waveguide is used to stimulate multimode interference, and the light with equal power splitting is transmitted to the next device, that is, the mode spot converter, through a small tapered waveguide of the same size.

[0086] In order to emit the first wavelength light beam in the first transmission direction at the maximum diffusion angle, a tapered waveguide is used to expand the excitation light with minimum loss to increase the area of ​​fluorescence excitation. And by adjusting the maximum and minimum end widths and overall length of the tapered waveguide, the second wavelength light beam in the second transmission direction is converged and collected. The transmission loss is minimized when the two functions are balanced by adjusting the size parameters.

[0087] In practical applications, the projection of the first wavelength light beam and the second wavelength light beam transmitted in the interference waveguide can be adjusted by adjusting the length of the rectangular waveguide, so that both wavelength bands are output at the same port. The reversibility of the optical path can be used to solve the problem of collecting the second wavelength light in the second transmission direction using the same device.

[0088] In an exemplary embodiment, the number of interfaces at the first end of the pattern spot converter is consistent with the number of interfaces at the second end of the multimode interference coupler;

[0089] The number of interfaces at the second end of the pattern spot converter is consistent with the number of interfaces at the first end of the pattern spot converter.

[0090] In an exemplary embodiment, the pattern spot converter includes a straight waveguide and a tapered waveguide;

[0091] The mode spot converter is connected to the second end of the multimode interference coupler through a straight waveguide;

[0092] The straight waveguide 10 of the pattern spot converter is connected to the first end of the tapered waveguide, and the cross-sectional area of ​​the second end of the tapered waveguide 11 of the pattern spot converter is larger than the cross-sectional area of ​​the first end.

[0093] like Figure 3 and Figure 4 As shown, in actual applications, the second end of the multimode interference coupler 2 may include five tapered waveguides, and correspondingly, the first end of the mode spot converter may also include five straight waveguides, and the second end includes five tapered waveguides. The tapered waveguide 9 of the multimode interference coupler is in a one-to-one correspondence with the straight waveguide 10 of the mode spot converter and the tapered waveguide 11 of the mode spot converter.

[0094] In practical applications, the tapered waveguide 9 of the multimode interference coupler can be called a beam splitting waveguide according to its function. The function of the beam splitting waveguide is to divide a complete beam of light into several equal parts through the principle of mirror interference, so as to increase the contact range of the light beam with the object to be measured when it is output, and improve the accuracy of temperature measurement. The tapered waveguide 11 of the mode spot converter can be called a beam expanding waveguide according to its function. The function of the beam expanding waveguide is to change the shape of the light beam, adjust the light beam from a thinner diameter to a thicker diameter, increase the contact area of ​​the light beam with the object to be measured, and also improve the accuracy of temperature measurement.

[0095] Figure 2 One embodiment of a wavelength division multiplexer is illustrated.

[0096] like Figure 2 As shown, in an exemplary embodiment, the wavelength division multiplexer includes a tapered waveguide;

[0097] The tapered waveguide 4 of the wavelength division multiplexer is connected to the straight waveguide of the multimode interference coupler.

[0098] Figure 5 This is the fifth structural schematic diagram of the photonic integrated device provided in the embodiment of the present invention.

[0099] Figure 6 This is the sixth structural schematic diagram of the photonic integrated device provided in the embodiment of the present invention.

[0100] like Figure 5 and Figure 6 As shown, in the exemplary embodiment, the photonic integrated device includes a packaging layer 14, a waveguide layer 13 and a substrate layer 12;

[0101] The waveguide layer 13 is located between the packaging layer 14 and the substrate layer 12 , and the waveguide layer includes the wavelength division multiplexer, the multimode interference coupler and the spot mode converter.

[0102] In practical applications, the substrate layer and the packaging layer may be made of polydimethylsiloxane, and the waveguide layer may be made of polymethyl methacrylate.

[0103] In an exemplary embodiment, the thickness of the packaging layer can be 5 microns, the thickness of the substrate layer can be 5 microns, the thickness of the waveguide layer can be 1 micron, the width of the second port of the wavelength division multiplexer can be 1 micron, the length can be 50 microns, the width of the third end 6 of the wavelength division multiplexer can be 2 microns, the length can be 50 microns, and the curvature can be 0.9; the length of the tapered waveguide of the wavelength division multiplexer can be 30 microns, the width of the end close to the second port can be 3 microns, and the width of the end close to the multimode interference coupler can be 1 micron; the width of the straight waveguide 7 of the multimode interference coupler can be 1 micron, the length can be 50 microns, and the rectangular waveguide of the multimode interference coupler can be 1 micron. The broadband of the guide can be 25 microns, and the length can be 950 nanometers. The length of the splitting waveguide of the multimode interference coupler can be 20 microns, the width at one end close to the rectangular waveguide is 2 microns, the width at one end of the principle rectangular waveguide is 1 micron, and the spacing between each splitting waveguide is 5 microns; the width of the straight waveguide of the spot converter can be 1 micron, and the length can be 5 microns. The spacing between multiple straight waveguides of the spot converter can be 5 microns, the length of the beam expansion waveguide of the spot converter can be 8 microns, the width at one end close to the multimode interference coupler can be 1 micron, and the width at one end away from the multimode interference coupler can be 5 microns.

[0104] In the scheme of this embodiment, by controlling the length, width and other dimensions of each component in the photonic integrated device, the light transmission efficiency of the photonic integrated device can be changed and the light transmission efficiency can be maximized. Specifically, in practical applications, the transmission efficiency of the first wavelength light beam in this embodiment is 57% when passing through the wavelength division multiplexing device, the transmission efficiency through the multimode interference coupler is 90%, the transmission efficiency through the mode spot converter is 59%, and the total transmittance is 30%; the transmission efficiency of the second wavelength light beam through the mode spot converter is 65%, the transmission efficiency through the multimode interference coupler is 49%, the transmission efficiency through the wavelength division multiplexing device is 89%, and the total transmittance of fluorescence is 28%. Overall, the photonic integrated device in this embodiment has a high data transmission efficiency.

[0105] The solution of this embodiment also provides a wearable temperature measurement device, including the photonic integrated device described in any of the above embodiments.

[0106] Figure 7 Schematic diagram of the structure of a wearable temperature measuring device provided in an embodiment of the present invention.

[0107] like Figure 7As shown, in actual application, the photon integrated device 15 can be packaged in the armpit area of ​​clothing, the output port of the photon integrated device 15 is connected to the optical fiber 16, the optical fiber 16 is woven into the clothing, the optical fiber 16 transmits the optical signal to the demodulation module 17, the demodulation module 17 is packaged in the pocket of the clothing, and the optical signal is demodulated to realize a wearable temperature measurement device. In practice, the present invention can also be a device packaged in a soldier's helmet to monitor the soldier's body temperature in real time.

[0108] The wearable temperature measuring device provided in this embodiment is realized by waveguide, and the selection of waveguide material can make it have sufficient refractive index to ensure the transmission of light beam. The base layer and waveguide layer in the photon integrator can be made of flexible materials, which greatly enhances the flexibility and fit of the device, and can improve the comfort of fitting with the body in wearable measurement; in addition, the temperature measurement sensitivity of the micron-level device is higher, and the fluorescence temperature measurement method based on the wearable temperature measuring device can eliminate the influence of force on temperature measurement, and realize the filtering and beam splitting while realizing the fluorescence lifetime temperature measurement sensing function, which greatly reduces the system complexity of the entire sensing system.

[0109] The fluorescence temperature measurement method provided by the present invention is described below. The fluorescence temperature measurement method described below and the photonic integrated device described above can be referenced to each other.

[0110] Figure 8 It is a flow chart of the fluorescence temperature measurement method provided in an embodiment of the present invention.

[0111] like Figure 8 As shown, the fluorescence temperature measurement method provided in this embodiment is implemented by the above-mentioned wearable temperature measurement device, and the method includes:

[0112] Step 801, outputting a light beam of a first wavelength through a photonic integrated device, and collecting a light beam of a second wavelength through the photonic integrated device, wherein the light beam of the second wavelength is generated after the light beam of the first wavelength is irradiated onto a fluorescent substance, and the fluorescent substance is arranged on a second end surface of a pattern spot converter of the photonic integrated device;

[0113] Step 802: fitting a fluorescence lifetime curve through the fluorescence decay time of the second wavelength to determine the temperature value of the object to be measured.

[0114] In implementation, the fluorescent substance is arranged on the port surface of the second end of the pattern spot converter, and after packaging, the entire device is in contact with the temperature field to be measured.

[0115] In practical applications, the second end of the spot converter of the photon integrated device can continuously output 10HZ pulse excitation light. In practical applications, the frequency of the pulsed laser light can be set according to the fluorescence lifetime of the selected fluorescent material. In addition, the wavelength band of the first wavelength light beam input at the second end of the wavelength division multiplexer of the photon integrated device and the second wavelength light beam output from the third section are also related to the selection of the fluorescent material. When the excitation light disappears, the fluorescence emitted by the fluorescent material on the object to be measured will be output from the port and received by the photon integrated device; then the attenuation curve of the fluorescence can be determined, and the lifetime curve of the fluorescence from generation to extinction can be obtained by inversion, and the calibrated temperature value can be fitted to realize real-time temperature measurement demodulation. In other words, the change of the temperature of the surface of the object to be measured will affect the fluorescence lifetime curve, and the temperature value and the fluorescence lifetime curve have a one-to-one correspondence. In this embodiment, the temperature value of the surface of the object to be measured is determined by determining the fluorescence lifetime curve.

[0116] Fig. 9 An example of a physical structure diagram of an electronic device is shown in FIG. Fig. 9 As shown, the electronic device may include: a processor 910, a communication interface 920, a memory 930 and a communication bus 940, wherein the processor 910, the communication interface 920 and the memory 930 communicate with each other through the communication bus 940. The processor 910 may call the logic instructions in the memory 930 to execute the fluorescence temperature measurement method, which includes:

[0117] Outputting a light beam of a first wavelength through a photonic integrated device, and collecting a light beam of a second wavelength through the photonic integrated device, wherein the light beam of the second wavelength is generated after the light beam of the first wavelength is irradiated onto a fluorescent substance, and the fluorescent substance is arranged on a second end surface of a pattern spot converter of the photonic integrated device;

[0118] The temperature value of the object to be measured is determined by the wavelength and intensity of the light beam with the second wavelength.

[0119] In addition, the logic instructions in the above-mentioned memory 930 can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0120] On the other hand, the present invention further provides a computer program product, which includes a computer program. The computer program can be stored in a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the fluorescence temperature measurement method provided by the above methods. The method includes:

[0121] Outputting a light beam of a first wavelength through a photonic integrated device, and collecting a light beam of a second wavelength through the photonic integrated device, wherein the light beam of the second wavelength is generated after the light beam of the first wavelength is irradiated onto a fluorescent substance, wherein the fluorescent substance is disposed on a second end surface of a pattern spot converter of the photonic integrated device where the fluorescent substance is disposed;

[0122] The temperature value of the object to be measured is determined by the wavelength and intensity of the light beam with the second wavelength.

[0123] In another aspect, the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the method for measuring fluorescence temperature provided by the above methods is implemented, and the method comprises:

[0124] Outputting a light beam of a first wavelength through a photonic integrated device, and collecting a light beam of a second wavelength through the photonic integrated device, wherein the light beam of the second wavelength is generated after the light beam of the first wavelength is irradiated onto a fluorescent substance, wherein the fluorescent substance is disposed on a second end surface of a pattern spot converter of the photonic integrated device where the fluorescent substance is disposed;

[0125] The temperature value of the object to be measured is determined by the wavelength and intensity of the light beam with the second wavelength.

[0126] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, i.e., they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Those of ordinary skill in the art may understand and implement it without creative effort.

[0127] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods of each embodiment or some parts of the embodiment.

[0128] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A photonic integrated device, characterized in that: include: A wavelength division multiplexer, a multimode interference coupler and a spot converter, wherein the wavelength division multiplexer, the multimode interference coupler and the spot converter are prepared using waveguides, and the material of the waveguides meets the transmission requirements of the light beam; The first end of the wavelength division multiplexer is connected to the first end of the multimode interference coupler; The second end of the multimode interference coupler is connected to the first end of the mode spot converter; The second end of the wavelength division multiplexer is used to input a light beam of a first wavelength, and the third end of the wavelength division multiplexer is used to output a light beam of a second wavelength, wherein the light beam of the second wavelength carries temperature data; The second end of the pattern spot converter is used to output a light beam of a first wavelength and to input a light beam of a second wavelength; The size of the connection part between the wavelength division multiplexer, the multimode interference coupler and the spot size converter satisfies the single-mode transmission of the light beam of the first wavelength and the light beam of the second wavelength; The wavelength division multiplexer is used to filter and split the light beam of the first wavelength and the light beam of the second wavelength, and the structural parameters of the wavelength division multiplexer are adapted to the light beam of the first wavelength and the light beam of the second wavelength; The multimode interference coupler is used to split and collect the light beam of the first wavelength and the light beam of the second wavelength, and the structural parameters of the multimode interference coupler are adapted to the light beam of the first wavelength and the light beam of the second wavelength; The pattern spot converter is used to increase the divergence angle of the first wavelength light and to increase the collection surface of the second wavelength light. The structural parameters of the pattern spot converter are adapted to the light beam of the first wavelength and the light beam of the second wavelength.

2. The photonic integrated device according to claim 1, characterized in that: The first end of the multimode interference coupler includes an interface; The second end of the multimode interference coupler includes at least two interfaces.

3. The photonic integrated device according to claim 2, characterized in that: The number of interfaces at the first end of the pattern spot converter is consistent with the number of interfaces at the second end of the multimode interference coupler; The number of interfaces at the second end of the pattern spot converter is consistent with the number of interfaces at the first end of the pattern spot converter.

4. The photonic integrated device according to claim 1, characterized in that: The first end of the multimode interference coupler is a straight waveguide; The second end of the multimode interference coupler is a tapered waveguide; A rectangular waveguide is further provided between the first end and the second end of the multimode interference coupler, and the rectangular waveguide is used to evenly divide the light beam of the first wavelength input from the first end into a plurality of light beams and output them from the second end of the multimode interference coupler; The rectangular waveguide is also used to collect a light beam of a second wavelength input from the second end and output the light beam from the first end of the multi-mode interference coupler.

5. The photonic integrated device according to claim 1, characterized in that: The pattern spot converter includes a straight waveguide and a tapered waveguide; The mode spot converter is connected to the second end of the multimode interference coupler through a straight waveguide; The straight waveguide of the pattern spot converter is connected to the first end of the tapered waveguide, and the cross-sectional area of ​​the second end of the tapered waveguide of the pattern spot converter is larger than the cross-sectional area of ​​the first end.

6. The photonic integrated device according to claim 1, characterized in that: The wavelength division multiplexer includes a tapered waveguide; The wavelength division multiplexer is connected to the straight waveguide of the multimode interference coupler through a tapered waveguide.

7. The photonic integrated device according to claim 1, characterized in that: comprising a packaging layer, a waveguide layer and a substrate layer; The waveguide layer and the substrate layer are made of flexible materials to enhance the flexibility and conformability of the photonic integrated device; The waveguide layer is located between the packaging layer and the substrate layer, and the waveguide layer includes the wavelength division multiplexer, the multimode interference coupler and the mode spot converter.

8. A wearable temperature measuring device, characterized in that: A photonic integrated device comprising any one of claims 1-7.

9. A fluorescence temperature measurement method, implemented by the wearable temperature measurement device according to claim 8, characterized in that: include: Outputting a light beam of a first wavelength through a photonic integrated device, and collecting a light beam of a second wavelength through the photonic integrated device, wherein the light beam of the second wavelength is generated after the light beam of the first wavelength is irradiated onto a fluorescent substance, and the fluorescent substance is arranged on a second end surface of a pattern spot converter of the photonic integrated device; The temperature value of the object to be measured is determined by the fluorescence decay lifetime of the light beam of the second wavelength.

10. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the fluorescence temperature measurement method as claimed in claim 9 is implemented.

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