Judging from this person's age, Stokes' space vectors are quite complex and brain-burning. Most graduate students can't figure it out. Guan Debao doesn't think this guy has any high level.

Vectors are the easiest to confuse people.

However, if Liu Chen had any idea about fiber optic theory, he might not be as confident as he was when talking about mathematical descriptions.

Liu Chen stood up and drew the relationship between the various components of the second-order pmd on the whiteboard.

Ling'er looked up at him with beautiful eyes, shining with brilliance, confusion, and a sense of appreciation, or surprise. Too many complex emotions were mixed together, and she looked at her junior with her lips pursed.

"This is how vector expressions are." Liu Chen explained it very in-depth and easy to understand, "I believe that student Zhuoling must have understood it."

Well, Ling'er nodded.

Chang Qing kept nodding. Although Mr. Gong had been praising Liu Chen for no means of his life, he knew that Liu Chen was so awesome to build a big company, but it was the first time he saw him talking about professional knowledge. He immediately realized that this guy was indeed powerful. Such obscure and difficult-to-understand knowledge was so straightforward and so profound.

He hurriedly said, "Chen Yue, your part has always been a weakness. Listen carefully, Liu Chen has spoken very well."

"Teacher, I understand, Teacher Liu Chen is really good." She said with a flash of eyes, increasing her knowledge, and she didn't know where Liu Chen came from for a while, and she was called the teacher.

Guan Debao's face was not very good.

"Zhuoling, keep talking." Chang Qing said with a smile. He was so happy that Liu Chen's girlfriend was in the fiber optic laboratory. Otherwise, she would not have had the chance to contact this young genius. Mr. Gong refused to recruit him directly. Damn, he had created such a big company at such a young age, with at least hundreds of millions of assets. Thinking of this, he couldn't help but envy him.

"Okay, teacher." Zhuo Ling continued calmly, "In order to overcome the PMD of the fiber, from 2001 to 2003, fiber torsion technology was used to manufacture optical fibers with low PMD coefficients. Fiber torsion means that during the manufacturing process, the fiber is close to the silicon melting point and has a viscous moment, and the fiber during the drawing process is constantly twisting the optical fiber with a certain torque..."

"What is the relationship between fiber torsion and PMD coefficient?"

"Why has the low-speed pulling been replaced?"

...

Almost Zhuoling didn't want to say a word, Guan Debao had to ask questions. Although she was a little stuck, she insisted on thinking and then answering. I have to say that in this process, her thinking became clearer, but it was really difficult to deal with it. After all, the time to enter the laboratory was too short.

Liu Chen didn't say anything else. Although Guan Debao asked a question with a short spear and his eyes looked at him from time to time, it was provocative. Because of jealousy, anger, and wanted to compete for the long term, Liu Chen did not respond anymore. He understood that Ling'er was proud and needed to face it independently to grow up. These questions were not unanswered, unless Guan Debao's questions exceeded the undergraduate major.

Despite this, it was still very distressing for him to watch it with his own eyes.

"Okay, Mr. Zhuoling's first report was made. The data was collected in detail. He reviewed the basic concepts of polarization mode dispersion and solved various relief technologies and compensation technologies for optical signal transmission damage caused by polarization mode dispersion. At present, the dynamic combination of polarization mode dispersion and compensation technology is to solve the development direction of high-speed long-distance transmission..."

Chang Qing saw Liu Chen's unspeakable entanglement and could understand his intentions very well, so he never spoke. After all, taking care of him is different from complete protection and spoiling. If he is over, it will backfire and will not criticize him for his obvious venting anger. After all, scientific research is not gentle, but rather a bloody process and a tearful thinking.

After his summary, it was over, and Guan Debao was still unsatisfied.

Changyuan Road: "Xiaoguan, come on the next one."

Guan Debao came to the computer in the report seat and said in a somewhat arrogant tone: "My recent topic is related to Teacher Yan's side. The application of fiber optic communication technology in relay protection, combined with the fiber optic current differential xh-803 fiber interface of the high-voltage line protection device, has analyzed the fiber optic communication system in high-voltage line relay protection, and specially studied the special methods of fiber optic channel, 64kb multiplexing and 2mb multiplexing methods, the communication architecture of the connection method, as well as various influencing factors of fiber optic channel communication performance under the above three connection methods, including the clock method of optical terminals and multiplexed devices, optical reception power, optical transmission power, optical saturation power, communication channel margin, electromagnetic shielding measures and equipment matching and other key technologies, and analyzed and discussed them..."

He is worthy of being the scientific research star of the University of Electrical Engineering last year. Teacher Guan talked freely, with clear ideas and steady typhoons. Especially the details that may arise in doubt are covered in all aspects. The teachers said nothing, and the students seemed to understand it, so naturally they dared not say anything.

Of course, there are exceptions.

Gao Jian held his breath and felt uncomfortable following Teacher Yan Sheng's team. Unexpectedly, he was assigned directly to Lin Yong, with two useless masters and a female doctor who knew that the information was just absent. He caught up with the girl who had been pursuing for several months and got along with others. Recently, he was in a state of vain.

"Teacher Guan, how is the clock configured?"

Gao Jian broke the story of Teacher Guan and took the lead in asking questions. Teacher Guan glanced at him and actually some students dared to interrupt him and asked questions, which was not very pleasant.

Which student doesn’t know that Teacher Guan’s logic is rigorous and impeccable, and few people ask questions.

"Your method of questioning actually has a problem, which means that your understanding of this problem is on the surface. Under a special method, there are no other clock references in the optical fiber communication system. At least one end of the optical transmission module is required to set up the main clock, so that the optical transmission module of the transmission interface is used to provide a clock reference for the optical transmission and transmission interface optical transmission data. The most accurate method should be how to set the clock, not configure it."

This is Teacher Guan’s style. He ridiculed the questioner in turn. Almost every time, no one dared to speak over time.

Gao Jian's face was not very good-looking. He wanted to refute something, but he still refused to say anything.

Guan Debao continued: "Under general circumstances, the sending clocks on both sides can be set to work in the master-main mode. At this time, the sending data clock uses an internal clock, and the receiving data clock uses a clock extracted from the receiving data stream."

What else can be said besides being speechless?

A few minutes later.

"Wait, Teacher Guan, I remember that in relay protection, fiber channel margin calculation is essential. Did you miss it?"

Gao Jian was dormant and finally caught another problem.

Guan Debao smiled and said, "How could I forget what you, an outsider, knows?"

Guan Debao no longer concealed his sneer at Gao Jian’s question.

"The reason why I didn't say this question was not an omission, but I just came up with it later. Since you ask, let's talk about it first. Since the optical module's work is greatly affected by temperature and aging, in order to ensure the normal operation of the channel, fiber channel margin verification is required. When checking the channel margin, the transmission power and reception sensitivity are measured and corrected values ​​or factory nominal values ​​of the optical module, and other parameters are used as empirical reference values."

"For this purpose, I specially programmed a small program, which only needs to enter parameters to calculate. I will upload this program in the laboratory TP later. If you are interested, you can download and research."

Gao Jian's question was like a entrusting man. Guan Debao's answers were impeccable. He, who had always claimed to be a technical expert, couldn't hold on his face. His fair skin was blood-red, and he felt embarrassed. He gritted his teeth and said nothing.

...
Chapter completed!