Reserve future | optical communication expert Xie wei full-time join the university of west lake
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In 1989, Xie Wei graduated from the University of Science and Technology of China with a bachelor's degree in physics, and was funded by the Sino-American Joint Training Physics Graduate Student Program (CUSPEA). The program, led by Nobel Prize winner Dr. Lee Zhengdao, selects and sends students to graduate students in physics in the United States.
Also in that year, the world's first commercial Internet service provider began to provide commercial Internet access services in the form of dial-up Internet access.
Xie Wei was admitted to the physics Department at the University of Southern California. At that time in China, ordinary people may not even heard of the Internet, and Xie Wei naturally knew little about communication.
Two years after admission, a new professor came to the department of electrical engineering. In the 1980s and 1990s, Bell Labs has been at the forefront of innovation in communications. The new professor Willner, also from Bell Labs, plans to study fiber communications in the field.
Xie Wei is a physics student, especially in optics. Optical fiber communication, in that era, was still a very new direction, although he only understood optics and did not understand communication, but Xie Wei thought this was a good idea.
With a strange intuition, the Chinese student bravely knocked on the door of Professor Willner, and has since then opened his own door in the field of optical communication research.
People are social animals. When the Internet suddenly covers the possibility of communication to the whole earth, it opens up people's infinite imagination of this kind of communication. Especially in the last 10 years, thanks to the continuous development of optical fiber-to-use communications technology, the transmission rate of the Internet has increased by nearly 250 times.
Among them, the application of OFDM and related technologies first proposed by Xie Wei's team in coherent optical communication is one of the technologies that play a key role.
OFDM, translated into orthogonal frequency division multiplexing technology, is a way of signal processing through which a more efficient and more stable multi-carrier transmission scheme is achieved.
This is a technology originally used in wireless communications, which is also called Wi-Fi. In 2006, Xie Wei's team "moved it" to coherent optical communication, and proposed to switch from single carrier to multiple carrier wave, which can greatly improve the efficiency of optical fiber communication. This theory, opened up the thinking of researchers, but also opened up a new field.
In the following four or five years, Xie Wei's team continued to improve the series of theoretical and experimental research related to OFDM and multi-carrier wave. At the same time, more laboratories and communication manufacturers began to pay attention to and invest in the exploration of optical communication technology based on multi-carrier modulation, which greatly improved the rate and capacity of the communication network.
If 2006 is the coordinate, the 4G and 5G that we are using more than 10 years later, mainly use this modulation mode. When we open the APP on mobile phones, tablets and computers, the smooth experience we get comes from a group of optical communication scientists like Xie Wei who have saved up the technology in the past.
After OFDM, Xie Wei began to reserve a further future.
Around 2010, in the era of 3G network, the bandwidth of domestic home broadband was far less than the current gigabit, but optical communication experts around the world have realized that bandwidth is no longer an inexhaustible resource of optical fiber. Xie Wei also led the students to study the Shannon limit of the optical fiber communication, and calculated the upper limit of the capacity of the single-mode optical fiber.
In other words, if the idea is limited to the single-mode optical fiber, then where is the "capacity ceiling" of the future of the Internet data transmission, it is obvious. It is also obvious that with the rapid development of artificial intelligence technology and mobile Internet, new concepts such as the meta-universe have put forward completely different orders of magnitude requirements for data transmission capacity.
How do I?
We can understand it with the common information superhighway concept. To ensure transmission stability, it used to be believed that fiber must be single mode, that is, data running in a single lane. Through more cars, the most direct way is to open up more lanes.
Xie Wei believes that with the development and improvement of technology, the limitations of single mode can be completely broken.
In 2011, Xie wei team in Optical Fiber Communication Conference (OFC), namely the optical fiber communication exhibition and seminar published PDP (post-deadline paper), the first light space multiplexing technology, shows the world the first to overcome the single mode optical fiber capacity limit less mode transmission, after the OFDM again created a new generation of large capacity optical fiber communication technology, will be in the future linear multiple increase transmission capacity.
At the same time, the Bell LabABS of the conference should not be underestimated. In the optical communication industry, this technology is one of the most popular next-generation transmission solutions, and is considered a 6G, 7G, as well as large data centers.
Someone once asked such a ridiculous question: the transmission bandwidth of the Internet, when can exceed the express logistics capacity "bandwidth"?
The absurd way of asking questions hides the expectations of the speed of the Internet.
This kind of expectation, also exists in Xie Wei's heart."Whenever the Internet needs to speed up, it is when we optical communication workers to display their ability.”
5G, big data, artificial intelligence, Internet of Things, meta-universe.... one new term after another, all making higher demands on data transmission capacity. Living in the digital world, we may already be used to short video, streaming media, and face payment, but we do not know that the "capacity crisis" is quietly approaching.
How long can the current communication network transmission technology still support it? Is it possible to get more transmission capacity to the optical fiber? How many years can the new laboratory technology reserve the rate and capacity for the Internet?
Saving up for the future is a career that Xie Wei has not stopped in the past 30 years. The professor from the Department of Electrical and Electronic Engineering at the University of Melbourne, Australia, recently joined the School of Engineering at Westlake University full-time as a professor of Optical Communication and Sensing.
Also in that year, the world's first commercial Internet service provider began to provide commercial Internet access services in the form of dial-up Internet access.
Xie Wei was admitted to the physics Department at the University of Southern California. At that time in China, ordinary people may not even heard of the Internet, and Xie Wei naturally knew little about communication.
Two years after admission, a new professor came to the department of electrical engineering. In the 1980s and 1990s, Bell Labs has been at the forefront of innovation in communications. The new professor Willner, also from Bell Labs, plans to study fiber communications in the field.
Xie Wei is a physics student, especially in optics. Optical fiber communication, in that era, was still a very new direction, although he only understood optics and did not understand communication, but Xie Wei thought this was a good idea.
With a strange intuition, the Chinese student bravely knocked on the door of Professor Willner, and has since then opened his own door in the field of optical communication research.
People are social animals. When the Internet suddenly covers the possibility of communication to the whole earth, it opens up people's infinite imagination of this kind of communication. Especially in the last 10 years, thanks to the continuous development of optical fiber-to-use communications technology, the transmission rate of the Internet has increased by nearly 250 times.
Among them, the application of OFDM and related technologies first proposed by Xie Wei's team in coherent optical communication is one of the technologies that play a key role.
OFDM, translated into orthogonal frequency division multiplexing technology, is a way of signal processing through which a more efficient and more stable multi-carrier transmission scheme is achieved.
This is a technology originally used in wireless communications, which is also called Wi-Fi. In 2006, Xie Wei's team "moved it" to coherent optical communication, and proposed to switch from single carrier to multiple carrier wave, which can greatly improve the efficiency of optical fiber communication. This theory, opened up the thinking of researchers, but also opened up a new field.
In the following four or five years, Xie Wei's team continued to improve the series of theoretical and experimental research related to OFDM and multi-carrier wave. At the same time, more laboratories and communication manufacturers began to pay attention to and invest in the exploration of optical communication technology based on multi-carrier modulation, which greatly improved the rate and capacity of the communication network.
If 2006 is the coordinate, the 4G and 5G that we are using more than 10 years later, mainly use this modulation mode. When we open the APP on mobile phones, tablets and computers, the smooth experience we get comes from a group of optical communication scientists like Xie Wei who have saved up the technology in the past.
After OFDM, Xie Wei began to reserve a further future.
Around 2010, in the era of 3G network, the bandwidth of domestic home broadband was far less than the current gigabit, but optical communication experts around the world have realized that bandwidth is no longer an inexhaustible resource of optical fiber. Xie Wei also led the students to study the Shannon limit of the optical fiber communication, and calculated the upper limit of the capacity of the single-mode optical fiber.
In other words, if the idea is limited to the single-mode optical fiber, then where is the "capacity ceiling" of the future of the Internet data transmission, it is obvious. It is also obvious that with the rapid development of artificial intelligence technology and mobile Internet, new concepts such as the meta-universe have put forward completely different orders of magnitude requirements for data transmission capacity.
How do I?
We can understand it with the common information superhighway concept. To ensure transmission stability, it used to be believed that fiber must be single mode, that is, data running in a single lane. Through more cars, the most direct way is to open up more lanes.
Xie Wei believes that with the development and improvement of technology, the limitations of single mode can be completely broken.
In 2011, Xie wei team in Optical Fiber Communication Conference (OFC), namely the optical fiber communication exhibition and seminar published PDP (post-deadline paper), the first light space multiplexing technology, shows the world the first to overcome the single mode optical fiber capacity limit less mode transmission, after the OFDM again created a new generation of large capacity optical fiber communication technology, will be in the future linear multiple increase transmission capacity.
At the same time, the Bell LabABS of the conference should not be underestimated. In the optical communication industry, this technology is one of the most popular next-generation transmission solutions, and is considered a 6G, 7G, as well as large data centers.
Someone once asked such a ridiculous question: the transmission bandwidth of the Internet, when can exceed the express logistics capacity "bandwidth"?
The absurd way of asking questions hides the expectations of the speed of the Internet.
This kind of expectation, also exists in Xie Wei's heart."Whenever the Internet needs to speed up, it is when we optical communication workers to display their ability.”
5G, big data, artificial intelligence, Internet of Things, meta-universe.... one new term after another, all making higher demands on data transmission capacity. Living in the digital world, we may already be used to short video, streaming media, and face payment, but we do not know that the "capacity crisis" is quietly approaching.
How long can the current communication network transmission technology still support it? Is it possible to get more transmission capacity to the optical fiber? How many years can the new laboratory technology reserve the rate and capacity for the Internet?
Saving up for the future is a career that Xie Wei has not stopped in the past 30 years. The professor from the Department of Electrical and Electronic Engineering at the University of Melbourne, Australia, recently joined the School of Engineering at Westlake University full-time as a professor of Optical Communication and Sensing.
