Lu Xue continued: "I wanted to go to Mr. Qin's graduate school, but his graduate school was too difficult to examine......" Lu Xue suddenly screamed when she said this, covered her mouth, and looked at Su Zhengming in fear.

Lin Yuan understood that Lu Xue said this, which was equivalent to saying that Su Zhengming was not as good as Qin Peng, but Su Zhengming smiled and said: "Students, if they think that laser is fun, they all want to go to laser majors, they don't know that laser still needs to be supported by materials, such as semiconductor lasers, it is necessary to use semiconductor materials - germanium arsenide, otherwise it is impossible to achieve it." ”

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

Su Zhengming replied: "Yes, yes, but you have to find germanium ore, as far as I know, there is no separate germanium on the earth, and germanium is usually symbiotic with other minerals." ”

Lin Yuan said: "I also know this problem, germanium ore and coal mine symbiosis together, in the coal produced in Xuanhua in my country, there is germanium ore symbiosis, and the content is not low, I can ask Liu Lao to refine germanium ore, and then send it to you." ”

Su Zhengming said: "Okay, you and Xiao Xue'er will go to Professor Qin and tell me how many of these materials are needed." ”

Lu Xue was already very familiar with the place where Qin Peng was, and soon took Lin Yuan to find a low house, and when he walked to the door, Lin Yuan asked, "Why does this room look so low?" ”

Lu Xue smiled: "You'll understand when you go in." ”

When Lin Yuan walked into the door, he realized that the main body of the entire house was underground, and Lin Yuan asked, "What's going on?" Why should his laboratory be kept underground? We will not be attacked by airstrikes. ”

Lu Xue said with a smile: "There is no way to do this, Professor Qin's place of work is always underground, and he is used to it, and when he built the R&D center, he proposed that the laboratory must be placed underground." ”

Lin Yuan said helplessly: "If others know the location of his laboratory and are determined to destroy his laboratory, even if he hides deeply, it is useless, and others can use a ground-penetrating bomb to blow him up." ”

The two of them walked towards the laboratory while talking, under the bright light, the corridor of the laboratory was slightly messy, and all kinds of wires were messily placed, Lin Yuan saw that the door was open with a small crack, so he stretched out his hand to open the door, and just as he was about to enter, he heard a person inside screaming: "Danger, hurry up and get out!" ”

Lin Yuan was so frightened that he withdrew his hand, 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 her, only to see a table in the middle of the room, messy wires piled up on the ground around him, and several computers made a "buzzing" sound.

On the table, a beam of crimson light was emitting from a square box, and there was a box at the target position, an old man was wearing goggles, looking at the box, Lu Xue stepped forward and smiled at the old man: "Teacher Qin, are you doing private work again?" Right? ”

That old man was Qin Peng, he said with a straight face: "Who let you in, I'm doing a test, you don't have goggles, people's eyeballs have a strong convergence effect on lasers, if you see lasers, it's easy to hurt your eyes!" ”

Lin Yuan thought to himself: "Will this laser hurt your eyes?" Why didn't I feel any discomfort after watching it. However, when he saw that the old man was angry, he was about to pull Lu Xue away, and Lu Xue said: "If this laser can really hurt your eyes, will you open the door to do the experiment?" ”

Lu Xue stretched out her hand and pressed on the laser, and with a "snap", the crimson light disappeared, Lu Xue reached out and picked up the box, opened the lid, and there was a burst of aroma of food floating from it, Lu Xue smiled: "Teacher Qin, you use the laser as a microwave oven to eat hot rice for yourself." ”

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

Lin Yuan hurriedly smiled and said, "There's nothing to do, there's nothing to do." ”

Qin Peng happily took the lunch box from Lu Xue's hand, picked up the chopsticks and took a bite, and then said with a smile: "Laser has a thermal effect, and a few milliseconds of irradiation can increase the temperature of the irradiated part by 200 to 1,000 degrees, but according to my experimental observations, it is true that using laser to heat rice is not as fast as using a microwave oven, but laser hot rice does have a special fragrance." ”

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

Lin Yuan smiled and waved his hand, and said, "We are here this time for ......"

"Stop!" Before Lin Yuan could finish speaking, Qin Peng interrupted him, then thought for a moment and said, "Let me guess what you guys are here for." ”

Without waiting for Lin Yuan to speak, Qin Peng said, "You must be building a laser proximity fuse?" Right? ”

The laser proximity fuse is to control the automatic explosion of artillery shells and missiles, which can automatically explode after approaching the enemy's weapons, Lin Yuan asked: "How do you know that I am going to make a laser proximity fuse?" ”

Qin Peng pointed at Lu Xue and said: "Because of her, she is now following Lao Su to engage in inorganic materials, semiconductor monocrystalline silicon or something, because the use of laser proximity fuses is large, so only semiconductor lasers have application value, if you use ruby lasers, the cost of just one fuze will account for half of the missile." ”

"If you don't want to get a laser fuse, you don't have to follow her to find me at all, but you are following her to find me, and the laser fuze must use a semiconductor laser, so it means that you have to get a laser proximity fuze."

Lin Yuan smiled helplessly and said: "You think too much, I use lasers, in fact, they are used for laser collimation and laser ranging, which are all used in engineering construction!" ”

Qin Peng shook his head helplessly and said, "So that's the case, these uses are all small paths, and the real avenues are 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: "That's my point of view: laser weapons can't be used in the atmosphere, because the atmosphere is too powerful for laser dissipation, and laser weapons have to be installed on the manned space station. ”

"For example, the Americans' KH-11 spy satellite, which has a full-spectrum camera on it, is said to be equipped with synthetic aperture radar in the latest model, which can image the ground regardless of weather conditions. As soon as these things are scrapped, the satellites become deaf and blind, and there is no threat to us at all. ”

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

Qin Peng said: "It is similar to other lasers in terms of basic principles, but the laser generation material of semiconductor lasers needs two kinds, we call it heterojunction, if there is only one substance, then the laser must work under ultra-low temperature conditions, this is obviously not suitable, we can now use germanium arsenide and aluminum arsenide, arsenic you must know the way, arsenic is there, but we lack a key thing." ”