The basic components of a laser can be divided into three parts: a pump source (which provides energy to achieve population inversion in the working medium); a working medium (which has a suitable energy level structure that enables population inversion under the action of the pump, allowing electrons to transition from high energy levels to the lower level and release energy in the form of photons); and a resonant cavity.
C-band EDFA is a core device for realizing undistorted transmission of optical signals in optical communication systems. According to its position and function in the signal amplification link, it can be divided into three types: Pre (Preamplifier), In-Line, and Booster.
Pump lasers are the "energy supply core" of laser systems. They inject light energy of a specific wavelength into gain media (such as erbium-doped fibers, solid-state crystals) to excite the media to produce stimulated radiation, and finally form a stable laser output. Their performance directly determines the power, efficiency and stability of laser systems.
A team from Zhejiang University's College of Optoelectronic Science and Engineering and Haining International University recently published their research findings on the world's first perovskite laser in the international journal Nature. This device, which utilizes a dual optical microcavity structure, combines low power consumption with easy tunability, making it suitable for applications such as optical data transmission and as a light-emitting diode in integrated photonic chips and wearable devices.
Broadband light sources, with their wide spectral coverage and stable output, play a key role in various scientific research and industrial applications.
The difference between fiber lasers and semiconductor lasers lies in the different dielectric materials used to emit laser light.
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