High-resolution transmission electron microscope observations show that just after a 30-nanosecond laser pointer pulse, the silicon carbide substrate melted and separated into a carbon layer and a silicon layer. More pulses cause the carbon layer to ...

Compared with semiconductor lasers, single-frequency fiber lasers have a much longer resonant cavity. Taking the distributed feedback (DFB) single-frequency fiber laser pointer with a short straight cavity structure as an example, the resonant cavity ...

The linewidth of a single-frequency laser is a concept in the frequency domain, which can be understood as the linewidth of the spectrum. From the description of the phase noise of the single-frequency laser pointer, it can be concluded that the phas ...

Since the advent of the first ruby ​​laser in 1960, laser technology has undergone many changes and has now become an important technology covering many fields such as industrial processing, communications, medical care, and military. The most well ...

Since the 1990s, fiber optic sensing technology based on Bragg gratings has received extensive attention from scientists and a lot of research has been conducted. Although USB clicker laser pointer the current large-scale, fast and cheap grating prod ...

At present, drones still need to maintain communication with the operator or GPS, so the electronic jamming system can use this weakness to implement "soft kill" against the drone threat, that is, eliminate the drone's operating status through hackin ...

Nuclear warheads can traverse the ocean in less than 30 minutes and are difficult to intercept. Currently, the US missile defense system is designed to intercept nuclear warheads in space. In the middle of the ballistic orbit, collision interceptors ...

UAV technology has matured, and its prospects for spying on business intelligence have also raised concerns. Even if hovering in the air that is not easily detectable by the human eye, the drone camera can still record experiments in the house, or co ...

It can be said that the series phased array radar is the heart of the "Aegis" system and the main early warning and detection system of the "Aegis" ship. The radar works in the S-band and has a maximum range of approximately 400 kilometers for air se ...

The US "Defense" monthly website recently reported that Lockheed Martin executives recently stated that the company is currently upgrading its "Aegis" advanced combat system to detect emerging threats such as hypersonic weapons and drone groups. . Th ...