Optical waveguide, silicon-based integrated optical switch and battery

Abstract

The invention discloses an optical waveguide, a silicon-based integrated optical switch and a battery, and belongs to the field of chip optical switches, the optical waveguide is made of a composite material, and the composite material comprises sodium bismuth titanate, potassium bismuth titanate and barium titanate; the refractive index of the optical waveguide changes along with the environment temperature. The silicon-based integrated optical switch comprises an optical waveguide, when the environment temperature is lower than the phase change temperature, the optical waveguide has a first refractive index, the silicon-based integrated optical switch is switched on, and when the environment temperature is higher than the phase change temperature, the optical waveguide has a second refractive index, and the silicon-based integrated optical switch is switched off. The optical waveguide is made of the composite material containing the sodium bismuth titanate, the potassium bismuth titanate and the barium titanate, the composite material optical waveguide is applied to the optical switch, the characteristic that the refractive index of the composite material optical waveguide changes along with the temperature is utilized, the optical switch can achieve the effect of switching on and off optical signals, the sensitivity of the optical switch to the temperature is improved, and the optical switch can be applied to the optical switch. The intelligent degree is improved, and the manufacturing cost is reduced.

Description

Technical Field

[0001] The present application relates to the field of chip optical switches, and in particular to an optical waveguide, a silicon-based integrated optical switch, and a battery. Background Art

[0002] With the rapid development of modern automobile technology and other traditional communication technologies, new energy vehicles are not only used as a means of transportation, but are also widely used in the Internet of Things. The status of the battery pack directly affects the performance of new energy vehicles. However, in the context of energy crisis and carbon neutrality, due to the large changes in the current inside the battery pack during the start-up, speed change and charging of electric vehicles, the internal chemical reaction and its own internal resistance will cause the battery temperature to change drastically, which is very likely to cause problems such as battery overheating and shortened battery life, and even cause battery explosion accidents. At present, the temperature control of power batteries still remains in the traditional air cooling and liquid cooling technology, or uses PTC ceramic heating elements for thermal management. These methods are not only unintelligent, but also bulky and unsafe.

[0003] Optical cross-connection technology is one of the key technologies, and its technical level directly determines the performance of new energy vehicles. Micromechanical optical switches using the piezoelectric effect have been developed abroad. This method is difficult to implement due to its complex process and limits its own application. At present, there are also optical switches using phase change materials, which are formed by or contain chalcogenides containing antimony, such as antimony selenide, antimony sulfide, etc. However, the optical switch has problems such as complex and large structure, many additional devices, complex testing, high operating power consumption, and no electro-optical effect, which cannot process optical signals, making its use scenario temperature single and unable to reach the required variable and suitable temperature. Summary of the invention

[0004] The present application provides an optical waveguide, a silicon-based integrated optical switch, and a battery, which can solve the technical problems of low intelligence level and high manufacturing cost of optical switches in the prior art.

[0005] In a first aspect, an embodiment of the present application provides an optical waveguide, characterized in that the material of the optical waveguide is a composite material, and the composite material includes sodium bismuth titanate, potassium bismuth titanate, and barium titanate;

[0006] The refractive index of the optical waveguide varies with ambient temperature.

[0007] In combination with the first aspect, in one embodiment, the composite material is a solid solution.

[0008] In combination with the first aspect, in one embodiment, the composite material has a phase transition temperature.

[0009] In combination with the first aspect, in one embodiment, the phase transition temperature of the composite material is between 50-350°C.

[0010] In combination with the first aspect, in one embodiment, the higher the content of sodium bismuth titanate and potassium bismuth titanate in the composite material, the higher the phase transition temperature.

[0011] In a second aspect, an embodiment of the present application provides a silicon-based integrated optical switch, comprising the optical waveguide;

[0012] When the ambient temperature is lower than the phase transition temperature, the optical waveguide has a first refractive index and the silicon-based integrated optical switch is turned on; when the ambient temperature is higher than the phase transition temperature, the optical waveguide has a second refractive index and the silicon-based integrated optical switch is turned off.

[0013] In combination with the second aspect, in one implementation, the silicon-based integrated optical switch includes a Mach-Zehnder modulator, and the optical waveguide is located in the Mach-Zehnder modulator.

[0014] In combination with the second aspect, in one implementation, the silicon-based integrated optical switch includes a beam combiner, and the optical waveguide is located in the beam combiner.

[0015] In combination with the second aspect, in one implementation, the optical waveguide is integrated on the silicon substrate of the silicon-based integrated optical switch.

[0016] In a third aspect, an embodiment of the present application provides a battery, comprising the silicon-based integrated optical switch;

[0017] When the ambient temperature is lower than the phase change temperature, the silicon-based integrated optical switch is turned on and the battery starts to work. When the ambient temperature is higher than the phase change temperature, the silicon-based integrated optical switch is turned off and the battery stops working.

[0018] The beneficial effects brought by the technical solution provided in the embodiments of the present application include:

[0019] An optical waveguide is made of a composite material including sodium bismuth titanate, potassium bismuth titanate, and barium titanate, and the composite optical waveguide is applied to an optical switch. By utilizing the property that the refractive index of the composite optical waveguide changes with temperature, the optical switch can realize the function of switching on and off optical signals, thereby improving the sensitivity of the optical switch to temperature, improving the degree of intelligence, and reducing manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of an embodiment of a silicon-based integrated optical switch of the present application. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0022] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0023] In a first aspect, embodiments of the present application provide an optical waveguide.

[0024] In one embodiment, the optical waveguide is made of a composite material, and the composite material includes sodium bismuth titanate BiNaTiO3 (BNT for short), potassium bismuth titanate BiKTiO3 (BKT for short), and barium titanate BaTiO3 (BT for short). The refractive index of the optical waveguide changes with the ambient temperature.

[0025] Furthermore, in one embodiment, the composite material is a solid solution.

[0026] Furthermore, in one embodiment, the composite material has a phase transition temperature.

[0027] Furthermore, in one embodiment, the phase transition temperature of the composite material is between 50-350°C.

[0028] In this embodiment, sodium bismuth titanate, potassium bismuth titanate, and barium titanate are used to generate a solid solution ferroelectric material sodium bismuth titanate-potassium bismuth titanate-barium titanate. The composite material can undergo phase change with temperature to form different crystal forms, and the phase change temperature point can be selected between 50-350°C.

[0029] Furthermore, in one embodiment, the higher the content of sodium bismuth titanate and potassium bismuth titanate in the composite material, the higher the phase transition temperature.

[0030] The higher the content of bismuth titanate-bismuth potassium titanate in the composite material, the higher the phase transition temperature. For example, when sodium bismuth titanate accounts for 80% and potassium bismuth titanate accounts for 10%, the phase transition temperature is about 300°C; when sodium bismuth titanate accounts for 30% and potassium bismuth titanate accounts for 30%, the phase transition temperature is about 200°C; when sodium bismuth titanate accounts for 10% and potassium bismuth titanate accounts for 10%, the phase transition temperature is about 150°C.

[0031] The composite material is reversible after returning to normal temperature range and can be used repeatedly.

[0032] In a second aspect, an embodiment of the present application further provides a silicon-based integrated optical switch 1 .

[0033] In one embodiment, referring to Figure 1 , Figure 1 This is a schematic diagram of the structure of an embodiment of a silicon-based integrated optical switch 1 of the present application. Figure 1 As shown, the silicon-based integrated optical switch 1 includes an optical waveguide, the material of the optical waveguide is a composite material, and the composite material includes sodium bismuth titanate, potassium bismuth titanate, and barium titanate; the refractive index of the optical waveguide changes with the ambient temperature.

[0034] When the ambient temperature is lower than the phase transition temperature, the optical waveguide has a first refractive index and the silicon-based integrated optical switch 1 is turned on. When the ambient temperature is higher than the phase transition temperature, the optical waveguide has a second refractive index and the silicon-based integrated optical switch 1 is turned off.

[0035] In this embodiment, since the phase transition temperature of sodium bismuth titanate is about 320°C and the phase transition temperature of potassium bismuth titanate is about 545°C, the phase transition (crystal morphology change) temperature point of the solid solution ferroelectric material formed, such as sodium bismuth titanate-potassium bismuth titanate-barium titanate, can be selected at 50-350°C. The three form a solid solution that can maintain an adjustable temperature to ensure the needs of different automotive usage environments. The crystal form will change, and the material performance is reversible to meet long-term use.

[0036] At normal temperature, the ferroelectric optical switch chip can transmit optical signals. Its functions include normal signal processing and can be integrated with a variety of other devices to meet the functions of intelligent communication. It greatly improves the performance of optical switches, reduces the size of devices, is easy to use, has low power consumption, high reliability, and is easy to process for mass production.

[0037] When the temperature of the new energy vehicle battery is abnormal and the ambient temperature of the optical waveguide in the optical switch rises to the threshold value (phase transition temperature), the refractive index of the ferroelectric material will change, and the light transmission will achieve the signal transmission of 0 or 1, achieving the effect of the optical switch to activate the car protection system. After the car protection system is activated, the voltage cannot drive electronic devices or cars, thereby preventing the new energy battery temperature from being too low or too high, affecting the normal use of the vehicle.

[0038] In a specific embodiment, referring to Figure 1 As shown, Figure 1 This is a schematic diagram of the structure of an embodiment of a silicon-based integrated optical switch 1 of the present application. Figure 1 As shown, the silicon-based integrated optical switch 1 chip includes a Mach-Zehnder modulator 2, a light detector 4, and a beam combiner 3. The light source is incident on the optical switch from one side of the Mach-Zehnder modulator 2. When the optical switch is turned on, the optical signal is output from one side of the beam combiner 3. When the optical switch is turned off, the optical signal cannot be output from one side of the beam combiner 3.

[0039] During specific manufacturing, the composite material is deposited on the SOI platform to form an optical waveguide, and the optical switch is made using the optical waveguide. When the composite material switches between different phases and meets the mode matching conditions, the light wave mode will be coupled in the coupling region at the rear end of the Mach-Zehnder modulator 2, and the two output beams of light interfere with each other, thereby realizing the opening or closing of the optical switch. When the car is in normal use, sodium bismuth titanate-potassium bismuth titanate-barium titanate can be used as an optical signal processing waveguide, as a bridge for automobile signal processing. When an abnormal situation occurs in a new energy vehicle, when the battery temperature reaches the phase change temperature of the sodium bismuth titanate-potassium bismuth titanate-barium titanate material, the sodium bismuth titanate-potassium bismuth titanate-barium titanate material undergoes a phase change, causing the material refractive index to change, thereby achieving the effect of a signal interference switch.

[0040] The waveguide material is perovskite material, which not only has a high electro-optical effect, but also meets the purpose of thermal management of new energy vehicles while processing signals.

[0041] The size of the sodium bismuth titanate-potassium bismuth titanate-barium titanate film uses the size of conventional optoelectronic chips and is compatible with communication functions.

[0042] The higher the content of bismuth titanate-bismuth potassium titanate in the composite material, the higher the phase transition temperature. For example, when sodium bismuth titanate accounts for 80% and potassium bismuth titanate accounts for 10%, the phase transition temperature is about 300°C; when sodium bismuth titanate accounts for 30% and potassium bismuth titanate accounts for 30%, the phase transition temperature is about 200°C; when sodium bismuth titanate accounts for 10% and potassium bismuth titanate accounts for 10%, the phase transition temperature is about 150°C.

[0043] Since the composite material is reversible after returning to normal temperature range, the optical switch can be used repeatedly.

[0044] Furthermore, in one embodiment, the silicon-based integrated optical switch 1 includes a Mach-Zehnder modulator 2 , and the optical waveguide is located in the Mach-Zehnder modulator 2 .

[0045] In this embodiment, the Mach-Zehnder modulator 2 is a commonly used optoelectronic device used in the field of optical communication and optoelectronics. It uses the electro-optical effect to achieve light modulation. The basic structure of the Mach-Zehnder modulator 2 includes an optical beam splitter, two optical waveguides and a phase modulator. The input optical signal is divided into two paths through the optical beam splitter and passes through two optical waveguides respectively. One of the optical waveguides is added with a voltage-modulated phase modulator, and the other optical waveguide is not modulated. The two optical signals converge again at the output end to produce interference. By controlling the voltage of the phase modulator, the amplitude and phase of the output optical signal can be modulated. After the optical waveguide in the Mach-Zehnder modulator 2 uses a composite material, it will produce a phase change at different temperatures, and the refractive index will change accordingly. Different refractive indices can be used to control whether the optical signal can be emitted, thereby realizing the switch on and off function.

[0046] Furthermore, in one embodiment, the silicon-based integrated optical switch 1 includes a beam combiner 3 , and the optical waveguide is located in the beam combiner 3 .

[0047] In this embodiment, the main structure of the optical fiber power combiner 3 is to remove the coating of several identical input optical fibers and arrange them closely in a certain way, and then fuse them with a section of output optical fiber after high-temperature heating and melting and taper. The optical fiber in the combiner 3 can also be called an optical waveguide. After the optical waveguide in the combiner 3 adopts a composite material, it will produce a phase change at different temperatures, and the refractive index will change accordingly. Different refractive indices can be used to control whether the optical signal can be emitted, thereby realizing the switch on and off function.

[0048] Furthermore, in one embodiment, the optical waveguide is integrated on the silicon substrate of the silicon-based integrated optical switch 1 .

[0049] In summary, the silicon-based optical switch chip is a conventional chip that can integrate multiple devices for signal processing, realize the same series on the market and is compatible with domestic single-chip microcomputers and non-integrated designs, and meet the automotive communication functions, greatly shortening the development time, saving costs and embodying a platform product with multiple sets of designs.

[0050] By selecting the phase change properties of ferroelectric materials, thermal management of automobiles is carried out, which is reversible and has a long service life.

[0051] The detector has a simple manufacturing process, low commercialization difficulty, and good performance. It is small in size and light in weight, meeting the industrial chain needs of the next generation of smart car network communications.

[0052] The system is mainly used in the field of new energy vehicles, including lithium batteries, sodium batteries, solid-state batteries, etc.

[0053] The chip of this solution uses external energy to achieve the purpose of switching. The driving power consumption of the optical switch chip is small and it is non-volatile.

[0054] Automotive-grade optical switch chips have efficient temperature control capabilities, ultra-high mechanical strength, and are lightweight and low-cost.

[0055] In a third aspect, an embodiment of the present application also provides a battery.

[0056] In one embodiment, the battery includes a silicon-based integrated optical switch 1; the silicon-based integrated optical switch 1 includes an optical waveguide, the material of the optical waveguide is a composite material, and the composite material includes sodium bismuth titanate, potassium bismuth titanate, and barium titanate; the refractive index of the optical waveguide changes with the ambient temperature.

[0057] When the ambient temperature is lower than the phase transition temperature, the optical waveguide has a first refractive index and the silicon-based integrated optical switch 1 is turned on. When the ambient temperature is higher than the phase transition temperature, the optical waveguide has a second refractive index and the silicon-based integrated optical switch 1 is turned off.

[0058] When the ambient temperature is lower than the phase change temperature, the silicon-based integrated optical switch 1 is turned on and the battery starts to work. When the ambient temperature is higher than the phase change temperature, the silicon-based integrated optical switch 1 is turned off and the battery stops working.

[0059] In this embodiment, since the phase transition temperature of sodium bismuth titanate is about 320°C and the phase transition temperature of potassium bismuth titanate is about 545°C, the phase transition (crystal morphology change) temperature point of the solid solution ferroelectric material formed, such as sodium bismuth titanate-potassium bismuth titanate-barium titanate, can be selected at 50-350°C. The three form a solid solution that can maintain an adjustable temperature to ensure the needs of different automotive usage environments. The crystal form will change, and the material performance is reversible to meet long-term use.

[0060] At normal temperature, the ferroelectric optical switch chip can transmit optical signals. Its functions include normal signal processing and can be integrated with a variety of other devices to meet the functions of intelligent communication. It greatly improves the performance of optical switches, reduces the size of devices, is easy to use, has low power consumption, high reliability, and is easy to process for mass production.

[0061] When the temperature of the new energy vehicle battery is abnormal and the ambient temperature of the optical waveguide in the optical switch rises to the threshold value (phase transition temperature), the refractive index of the ferroelectric material will change, and the light transmission will achieve the signal transmission of 0 or 1, achieving the effect of the optical switch to activate the car protection system. After the car protection system is activated, the voltage cannot drive electronic devices or cars, thereby preventing the new energy battery temperature from being too low or too high, affecting the normal use of the vehicle.

[0062] During specific manufacturing, the composite material is deposited on the SOI platform to form an optical waveguide, and the optical switch is made using the optical waveguide. When the composite material switches between different phases and meets the mode matching conditions, the light wave mode will be coupled in the coupling region at the rear end of the Mach-Zehnder modulator 2, and the two output beams of light interfere with each other, thereby realizing the opening or closing of the optical switch. When the car is in normal use, sodium bismuth titanate-potassium bismuth titanate-barium titanate can be used as an optical signal processing waveguide, as a bridge for automobile signal processing. When an abnormal situation occurs in a new energy vehicle, when the battery temperature reaches the phase change temperature of the sodium bismuth titanate-potassium bismuth titanate-barium titanate material, the sodium bismuth titanate-potassium bismuth titanate-barium titanate material undergoes a phase change, causing the material refractive index to change, thereby achieving the effect of a signal interference switch.

[0063] The waveguide material is perovskite material, which not only has a high electro-optical effect, but also meets the purpose of thermal management of new energy vehicles while processing signals.

[0064] The size of the sodium bismuth titanate-potassium bismuth titanate-barium titanate film uses the size of conventional optoelectronic chips and is compatible with communication functions.

[0065] The higher the content of bismuth titanate-bismuth potassium titanate in the composite material, the higher the phase transition temperature. For example, when sodium bismuth titanate accounts for 80% and potassium bismuth titanate accounts for 10%, the phase transition temperature is about 300°C; when sodium bismuth titanate accounts for 30% and potassium bismuth titanate accounts for 30%, the phase transition temperature is about 200°C; when sodium bismuth titanate accounts for 10% and potassium bismuth titanate accounts for 10%, the phase transition temperature is about 150°C.

[0066] Since the composite material is reversible after returning to normal temperature range, the battery can be used for a long time.

[0067] Furthermore, in one embodiment, the silicon-based integrated optical switch 1 includes a Mach-Zehnder modulator 2 , and the optical waveguide is located in the Mach-Zehnder modulator 2 .

[0068] In this embodiment, the Mach-Zehnder modulator 2 is a commonly used optoelectronic device used in the field of optical communication and optoelectronics. It uses the electro-optical effect to achieve light modulation. The basic structure of the Mach-Zehnder modulator 2 includes an optical beam splitter, two optical waveguides and a phase modulator. The input optical signal is divided into two paths through the optical beam splitter and passes through two optical waveguides respectively. One of the optical waveguides is added with a voltage-modulated phase modulator, and the other optical waveguide is not modulated. The two optical signals converge again at the output end to produce interference. By controlling the voltage of the phase modulator, the amplitude and phase of the output optical signal can be modulated. After the optical waveguide in the Mach-Zehnder modulator 2 uses a composite material, it will produce a phase change at different temperatures, and the refractive index will change accordingly. Different refractive indices can be used to control whether the optical signal can be emitted, thereby realizing the switch on and off function.

[0069] Furthermore, in one embodiment, the silicon-based integrated optical switch 1 includes a beam combiner 3 , and the optical waveguide is located in the beam combiner 3 .

[0070] In this embodiment, the main structure of the optical fiber power combiner 3 is to remove the coating of several identical input optical fibers and arrange them closely in a certain way, and then fuse them with a section of output optical fiber after high-temperature heating and melting and taper. The optical fiber in the combiner 3 can also be called an optical waveguide. After the optical waveguide in the combiner 3 adopts a composite material, it will produce a phase change at different temperatures, and the refractive index will change accordingly. Different refractive indices can be used to control whether the optical signal can be emitted, thereby realizing the switch on and off function.

[0071] Furthermore, in one embodiment, the optical waveguide is integrated on the silicon substrate of the silicon-based integrated optical switch 1 .

[0072] In summary, the silicon-based optical switch chip is a conventional chip that can integrate multiple devices for signal processing, realize the same series on the market and is compatible with domestic single-chip microcomputers and non-integrated designs, and meet the automotive communication functions, greatly shortening the development time, saving costs and embodying a platform product with multiple sets of designs.

[0073] By selecting the phase change properties of ferroelectric materials, thermal management of automobiles is carried out, which is reversible and has a long service life.

[0074] The detector has a simple manufacturing process, low commercialization difficulty, and good performance. It is small in size and light in weight, meeting the industrial chain needs of the next generation of smart car network communications.

[0075] The system is mainly used in the field of new energy vehicles, including lithium batteries, sodium batteries, solid-state batteries, etc.

[0076] The chip of this solution uses external energy to achieve the purpose of switching. The driving power consumption of the optical switch chip is small and it is non-volatile.

[0077] It should be noted that the serial numbers of the above-mentioned embodiments of the present application are only for description and do not represent the advantages or disadvantages of the embodiments.

[0078] The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices. The terms "first", "second" and "third" are used to distinguish different objects, etc., and do not represent a sequence, nor do they limit "first", "second" and "third" to different types.

[0079] In the description of the embodiments of the present application, "exemplary", "for example" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary", "for example" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary", "for example" or "for example" is intended to present related concepts in a specific way.

[0080] In the description of the embodiments of the present application, unless otherwise specified, “ / ” means or. For example, A / B can mean A or B. The “and / or” in the text is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, “multiple” refers to two or more than two.

[0081] In some processes described in the embodiments of the present application, multiple operations or steps that appear in a specific order are included, but it should be understood that these operations or steps may not be executed in the order in which they appear in the embodiments of the present application or in parallel, and the sequence number of the operation is only used to distinguish the different operations, and the sequence number itself does not represent any execution order. In addition, these processes may include more or fewer operations, and these operations or steps may be executed in sequence or in parallel, and these operations or steps may be combined.

[0082] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, disk, CD) as described above, and includes a number of instructions for a terminal device to execute the methods described in each embodiment of the present application.

[0083] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An optical waveguide, characterized in that: The material of the optical waveguide is a composite material, and the composite material includes sodium bismuth titanate, potassium bismuth titanate, and barium titanate; The refractive index of the optical waveguide varies with ambient temperature.

2. The silicon-based integrated optical switch according to claim 1, characterized in that: The composite material is a solid solution.

3. The silicon-based integrated optical switch according to claim 1, characterized in that: The composite material has a phase transition temperature.

4. The silicon-based integrated optical switch according to claim 3, characterized in that: The phase transition temperature of the composite material is between 50-350°C.

5. The silicon-based integrated optical switch according to claim 3, characterized in that: The higher the content of sodium bismuth titanate and potassium bismuth titanate in the composite material, the higher the phase transition temperature.

6. A silicon-based integrated optical switch, characterized in that: comprising the optical waveguide according to claim 1; When the ambient temperature is lower than the phase transition temperature, the optical waveguide has a first refractive index and the silicon-based integrated optical switch is turned on; when the ambient temperature is higher than the phase transition temperature, the optical waveguide has a second refractive index and the silicon-based integrated optical switch is turned off.

7. The silicon-based integrated optical switch according to claim 6, characterized in that: The silicon-based integrated optical switch includes a Mach-Zehnder modulator, and the optical waveguide is located in the Mach-Zehnder modulator.

8. The silicon-based integrated optical switch according to claim 6, characterized in that: The silicon-based integrated optical switch comprises a beam combiner, and the optical waveguide is located in the beam combiner.

9. The silicon-based integrated optical switch according to claim 6, characterized in that: The optical waveguide is integrated on the silicon base of the silicon-based integrated optical switch.

10. A battery, characterized in that: A silicon-based integrated optical switch comprising the silicon-based integrated optical switch according to claim 6; When the ambient temperature is lower than the phase change temperature, the silicon-based integrated optical switch is turned on and the battery starts to work. When the ambient temperature is higher than the phase change temperature, the silicon-based integrated optical switch is turned off and the battery stops working.

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