Open an aircraft carrier to fight against Japan

Lu Xue went on to say: "I wanted to go to Mr. Qin's graduate school, but his graduate school exam was too difficult..." Lu Xue suddenly screamed at this point, covered her mouth, and looked at Su Zhengming in fear .

Lin Yuan understood that what Lu Xue said was equivalent to saying that Su Zhengming was not as good as Qin Peng, but Su Zhengming laughed and said, "Students, if they think lasers are fun, they all want to major in lasers. They don't know that lasers still depend on materials. For support, such as semiconductor lasers, the semiconductor material-germanium arsenide must be used, otherwise it is impossible to realize."

Lin Yuan said, "Do we have germanium refining equipment here?"

Su Zhengming replied: "Yes, but you have to find germanium mines. As far as I know, germanium does not exist alone on the earth. Germanium usually coexists with other minerals."

Lin Yuan said: "I also know this problem. Generally, germanium ore coexists with coal mines. Among the coal produced in Xuanhua, my country, germanium ore coexists, and the content is not low. I can ask Mr. Liu to extract the germanium ore. , and send it to you."

Su Zhengming said: "Well, you and Xiao Xue'er can go to Professor Qin and tell me how many materials you need."

Lu Xue was already familiar with the place where Qin Peng was, and quickly led Lin Yuan to find a low house. When he walked to the door, Lin Yuan asked, "Why does this room look so short?"

Lu Xue smiled and said, "You will understand when you go in."

It wasn’t until Lin Yuan entered the gate that he realized that the main body of the entire house was underground. Lin Yuan asked, “What’s going on? Why is his laboratory placed underground? We won’t be attacked by air. "

Lu Xue said with a smile: "There is no way to do this. Professor Qin always works underground, and he is used to it. When building the R&D center, he proposed that the laboratory must be underground."

Lin Yuan said helplessly: "If someone else knows the location of his laboratory and is determined to destroy his laboratory, no matter how deep he hides, it will be useless. Others can blow him up with a ground-penetrating bomb." .”

The two of them walked towards the laboratory as they were talking. Under the bright light, the corridor of the laboratory was a bit messy, with various wires placed in a mess. Lin Yuan saw the door was a little open, so he stretched out his hand to open it. Just as I was about to enter the door, I heard a person screaming inside: "Dangerous, get out!"

Lin Yuan was so frightened that he withdrew his hands, and involuntarily took two steps back. Lu Xue was unmoved, reached out and opened the door and walked in. Lin Yuan was confused, so he had to follow behind her. There is a table, messy wires piled up on the ground around it, and several computers make a "humming" sound.

On the table, a beam of crimson light was being emitted from a square box. There was a box at the target position. An old man was wearing goggles. Looking at the box, Lu Xue stepped forward and spoke to the old man. He smiled and said, "Mr. Qin, are you doing private work again? Isn't it?"

That old man was Qin Peng, and he said with a stern face: "Who let you in, I'm doing experiments, you don't have goggles, human eyes have a strong converging effect on the laser, if you see the laser, it is easy to hurt into your eyes!"

Lin Yuan thought: "Will this laser hurt my eyes? Why don't I feel any discomfort after seeing it?" But when he saw the old man was angry, he wanted to pull Lu Xue away, and Lu Xue said, "If this Lasers can really hurt the eyes, would you open the door to experiment?"

Lu Xue stretched out her hand and pressed on the laser, and with a "pop", the crimson light disappeared. Lu Xue reached out to pick up the box, opened the lid, and there was a smell of food inside. Lu Xue smiled. Said: "Mr. Qin, you are using the laser as a microwave oven to heat your own meals."

Qin Peng chuckled, and said, "This is a secret, don't tell it." Turning his head, he saw Lin Yuan, and said, "In front of the captain, where do I put my old face as a laser expert? "

Lin Yuan quickly smiled and said, "It's all right."

Qin Peng cheerfully took the lunch box from Lu Xue, took a bite with the chopsticks, and then said with a smile: "The laser has a thermal effect, and the irradiation time of a few milliseconds can increase the temperature of the irradiated part by [-] to [-]." However, according to my experimental observations, it is true that heating rice with a laser is not as fast as using a microwave oven, but the rice heated by a laser does have a special aroma."

As he spoke, he handed the lunch box to Lin Yuan, and said with a smile, "Do you want to try it?"

Lin Yuan waved his hands with a smile, and said, "We are here this time to..."

"Stop!" Before Lin Yuan finished speaking, Qin Peng interrupted him, then thought for a while and said, "Let me guess what you are here for."

Before Lin Yuan could speak, Qin Peng said, "You must be building a laser proximity fuze, right?"

The laser proximity fuze is to control the automatic explosion of shells and missiles. It can automatically explode after approaching the enemy's weapon. Lin Yuan asked: "How do you know that I want to build a laser proximity fuze?"

Qin Peng pointed to Lu Xue and said: "Because of her, she is now following Lao Su to make inorganic materials, semiconductor monocrystalline silicon and so on. Because laser proximity fuzes are used a lot, only semiconductor lasers have application value. If you use a ruby ​​laser, the cost of a single fuze will account for half of the cost of the missile."

"If you don't want to make a laser fuze, you don't have to come to me with her at all, but you come to me with her. The laser fuze must use a semiconductor laser, so it means that you want to make a laser proximity fuze."

Lin Yuan smiled helplessly and said, "You think too much, I use lasers, but they are actually used for laser alignment and laser ranging, both of which are used in engineering construction!"

Qin Peng shook his head helplessly, and said, "It turns out that this is the case. These uses are small roads, and the real road is laser communication and laser weapons!"

Lin Yuan asked: "Speaking of laser weapons, how is our sea-based laser anti-missile test going?"

Speaking of this topic, Qin Peng said helplessly: "This is my point of view: laser weapons cannot be used in the atmosphere, because the atmosphere dissipates laser light too much, and laser weapons must be installed on manned space stations. , when the time comes, send an astronaut to control and aim at the enemy's satellites and missiles, one by one."

"For example, the American kh-11 spy satellite has a full-spectrum camera on it. It is said that the latest model will also be equipped with a synthetic aperture radar, which can image the ground regardless of weather conditions. As long as our laser beam hits it, the optical components on it will And the electronic components are finished immediately! Once these things are abolished, the satellite will become deaf and blind, and there is no threat to us."

Lin Yuan nodded and asked, "Can you tell me what semiconductor lasers need to do?"

Qin Peng said: "The basic principle is similar to other lasers, but the laser generating material of the semiconductor laser needs two kinds, which we call heterojunction. If there is only one kind of material, the laser must work under ultra-low temperature conditions. This is obviously not suitable, we can use germanium arsenide and aluminum arsenide now, you must know arsenic, arsenic is in it, but we lack one key thing."