The principle of lasers is based on stimulated emission, a concept first proposed by Einstein in the early 20th century. The main process is as follows.
According to the different transmission point moduli, optical fibers can be divided into single-mode fibers and multi-mode fibers. The so-called "mode" refers to a beam of light entering the optical fiber at a certain angular velocity.
Box Optronics launched a 1550nm, 100mW, 100kHz narrow-linewidth DFB laser diode in a 14-pin butterfly package with integrated TEC temperature control and monitoring PD.
TEC coolers essentially utilize the Peltier effect to directly convert electrical energy into thermal energy. They are a solid-state refrigeration technology that requires no mechanical motion.
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.
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