VBG technology (Volume Bragg Grating) is an optical filtering and wavelength control technology based on the three-dimensional periodic refractive index modulation of photosensitive materials. Its core applications include laser wavelength locking, linewidth narrowing, and beam shaping, and it is widely used in high-power lasers, pump sources (such as 976nm/980nm laser diodes), and fiber optic communications.
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.
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