Coarse Wavelength Division Multiplexing (CWDM) allows multiple signals to be transmitted simultaneously over a single optical fiber by using a different wavelength of light to carry each signal. CWDM operates in the wavelength range of 1270nm to 1610nm, with each CWDM channel typically spaced 20nm apart.
Ultra-narrow linewidth lasers are laser light sources with extremely narrow spectral linewidths, typically reaching the kHz or even Hz range, far smaller than conventional lasers (typically in the MHz range). Their core principle is to suppress laser frequency noise and linewidth broadening through various technical means, thereby achieving extremely high monochromaticity and frequency stability.
The laser diode module is a compact device that integrates a laser diode, driver circuit, TEC, and control interfaces into a package. These modules are primarily designed to provide convenient, efficient, and unique laser beams for a variety of applications.
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.
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