Bright Sword starts with the grenade flat.

Chapter 399: All Prepared
The most important point about Liu Qi's star destroyer cannon design is that Liu Qi improved the pump source and the stimulated body of the laser transmitter.

You should know that the laser pump source is the external energy that excites the laser material to emit light. Its quality and power are the key factors that directly determine the power of the laser.

Common laser pumping sources include optical pumping, electric pumping, chemical energy pumping, nuclear energy pumping, etc., among which optical pumping and electric pumping are the most common.

These two types of pump sources are more common in fiber lasers, solid-state lasers, and semiconductor lasers.

Of course, no matter what kind of spectral source it is, their working principles are basically the same, that is, by injecting external energy to excite the particles in the laser material, so that they capture energy and transition to a high energy level, producing a stimulated radiation effect, and light amplification occurs in the optical resonant cavity, thereby emitting lasers.

Generally speaking, the selection of different laser pump sources is based on economy and flexibility. Fiber-coupled laser diodes are often used as pumps for fiber lasers and solid-state lasers due to their high flexibility.

Laser diode pumped fiber laser uses a laser diode as a pump light source, transmits the laser diode's laser as light energy through an optical fiber, and inputs light energy to excite the laser material to emit laser light.

Laser diode pumped solid-state lasers also use laser diodes to pump solid materials. This is a semiconductor laser pump source that transmits light energy to solid laser materials through optical fibers or optical lens groups to stimulate laser emission.

A laser diode is actually a semiconductor laser that generates laser light by stimulating semiconductor materials with electrical energy. Due to its small size, it is often used as optical pumping for other large lasers and requires coupling with optical fiber for use.

Although the use of laser diodes, which is a direct laser pump source, has the advantages of good stability, high conversion efficiency, and support for continuous operation, it also has some shortcomings.

Among the advantages are high conversion efficiency. Since the initial optical input power is high and of good quality, the laser brightness of the pump source laser can quickly reach a high level.

Then there is the good stability. Since the introduction of external energy is relatively stable, the generated laser power is also stable and controllable.

Because the laser output is stable, it supports continuous operation. The pump source laser supports continuous laser output and is suitable for long-term work needs.

Of course, where there are advantages, there are naturally disadvantages. One of the disadvantages is that it requires a complex design of the laser's internal optical path.

In addition, it generates a lot of heat, and requires a higher heat dissipation efficiency to maintain the operation of the laser. For this reason, such optical pumping cannot produce a star-destroying laser cannon that meets Liu Xiu's needs.

Liu Qi's pump source is based on superconducting energy storage, which can release a large amount of current as a pump source in a short period of time.

These pump sources then pass through the crystallized superconductor to form high-energy lasers with the same wavelength and phase.

Of course, this crystallized superconductor is also Liu Qi's masterpiece. Because of his curiosity about superconductors, Liu Qi wondered whether he could turn superconductors into diamonds like carbon, and what the effect would be. As a result, the best stimulated body for lasers naturally appeared, just like the ruby ​​that produces lasers in ruby ​​lasers.

As for why graphite is black while diamond is transparent despite being both carbon, it has to do with their atomic arrangement structure.

Diamond and graphite are allotropes of carbon due to the different arrangement of their carbon atoms. Each carbon atom in graphite is connected to three other carbon atoms in a hexagonal arrangement, which are bonded by covalent bonds to form a covalent molecule. In this way, each carbon atom in graphite only forms three covalent bonds with other carbon atoms, and each carbon atom still retains a free electron to transmit charge, so graphite can conduct electricity.

Moreover, the structure of carbon atoms in graphite is hexagonal, overlapping each other in sheets. This layered structure makes graphite easy to slide when under pressure, and its hardness is not high, so graphite feels very smooth and is a good solid lubricant. Because flat graphite sheets can absorb light of different wavelengths, they appear opaque black. However, diamond crystals are tetrahedral structures, in which the four lone pairs of electrons of carbon atoms can all form covalent bonds, so there are no free electrons, so diamond cannot conduct electricity.

In addition, the carbon atoms in diamond are linked by tetravalent bonds. Since the CC bond in diamond is very strong, all the valence electrons participate in the formation of covalent bonds, forming a pyramid-shaped crystal structure, so the hardness of diamond is very high. And this structure of diamond also makes it absorb very few light bands. Most of the light that shines on the diamond is reflected or penetrated. Therefore, although it is very hard, it looks transparent.

Of course, superconducting materials are naturally made in this way, so superconducting crystals can naturally be made into stimulated radiators of solid-state lasers.

Therefore, the biggest advantage of Liu Qi's star destroyer cannon using superconducting crystals as the stimulated source is that it can almost 100% convert electrical energy into laser energy.

The 100% energy conversion efficiency naturally means one thing, that is, when electrical energy is converted into laser, there is no need to release huge amounts of heat.

Therefore, a large amount of cooling system can be naturally saved. If this superconducting laser is not used, but fiber laser or ruby ​​laser with the lowest energy conversion efficiency is used, then the star destroyer laser cannon will definitely not be manufactured.

After all, theoretically, 99 percent of the energy used by the laser produced by a ruby ​​laser will be lost as heat.

Only one percent of the energy is converted into laser to attack the enemy, and how to dissipate such huge heat is naturally a problem.

This is equivalent to burning one enemy to death with a laser, which is equivalent to burning ninety-nine of yourself to death with useless heat first.

Of course, in addition to thanking Liu Qi, we also have to thank the alien humans for the technological assistance in the successful design of the star-destroying laser cannon.

You should know that the reflective light sail on the Venture Star can reflect 99.9% of the light source, so it is naturally perfect for using it to manufacture a laser reflection chamber.

Of course, it is not easy to build a superconducting stimulated body with a diameter of 100 kilometers.

However, just as Liu Xiu was rushing to build the star-destroying laser cannon, the star system inhabited by alien humans four light years away also fell into a military explosion mode.

Because this time is different from the last disastrous defeat, because according to the information transmitted back by quantum entanglement, this time the interstellar expedition fleet composed of ten Entrepreneurship Star super transport ships suffered a disastrous defeat. The most important reason is that other interstellar civilizations were involved, and it was precisely because of this that it suffered a disastrous defeat.

So a large number of solar sails were manufactured and then launched into star orbit to absorb solar energy, thereby starting a collider to produce antihydrogen atoms.

That’s right, from the perspective of alien humans, the most powerful weapon is naturally the one that can annihilate matter and antimatter.

With the matter-antimatter annihilation bomb, alien humans can easily create annihilation bombs with an equivalent of tens of billions or even hundreds of billions.

(End of this chapter)