NakuLaser Blog

Lasers  are widely used in home appliances, medicine, industry, telecommunications and other fields. A few years ago, scientists introduced the concept of nanolasers. Their design is similar to traditional semiconductor lasers based on heterostructures that have been used for decades. The difference is that the cavity of nano lasers is very small, proportional to the wavelength of the light they emit. Since they mainly produce visible light and infrared light, their size is about one millionth of a meter. Nano lasers  have unique properties that are distinct from macro lasers. However, it is almost impossible to determine under what current the output radiation of a nanolaser is coherent; in addition, for practical applications, it is important to distinguish between two states of a nanolaser: a real laser effect with coherent output at high currents and a LED-like state with non-coherent output at low current. Researchers at the Moscow Institute of Physics and Tech...

Structurally, the laser requires a resonant cavity, a pump source, and the amplifier only needs to be pumped without the need for oscillation. The laser is converted into laser light by the pump light , and then the laser is continuously oscillated and amplified, and the amplifier needs to inject the signal laser in the early stage, and its function is to amplify the signal laser. The laser is a light source that can directly emit light and output an optical signal. The laser switch is controlled by the input electrical signal, and the input electrical signal is modulated into an optical signal, and then the optical signal is output. Fiber amplifier , not a light source. It converts the externally input electrical energy into pump light. When the signal light is incident, under the stimulation of the incident light, the energy level of the pump light transitions, and the energy of the pump light is transferred to the signal light, and the signal light is transmitted. The pow...