As the preferred pump source for EYDFA, the 976nm band precisely matches the absorption peak of erbium-ytterbium ions, offering high absorption efficiency and low thermal load. It can drive fiber lasers to output high-power lasers at 1030-1080nm, used in industrial processing scenarios such as laser cutting, welding, and cladding.
In scenarios where fiber optic sensor networks monitor the structural health of bridges and medical OCT equipment captures micron-level retinal lesions, SLED broadband light sources, with their ultra-wide spectrum, low coherence, and high stability, have become core components supporting high-precision optical systems. As a special light source between laser diodes and light-emitting diodes, these devices, through their unique light-emitting mechanism and circuit design, provide irreplaceable optical solutions for industrial monitoring, biomedicine, and national defense research.
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.
An SOA (Semiconductor Optical Amplifier Switch) is a core optical device that realizes optical signal switching/routing based on the gain saturation characteristics of a semiconductor optical amplifier (SOA). It combines the dual functions of "optical amplification" and "optical switching" and is widely used in optoelectronic communications (such as optical modules, optical cross-connects (OXC), and data center optical interconnects), especially suitable for high-speed, high-density optical network scenarios.
The linewidth of a laser, especially a single-frequency laser, refers to the width of its spectrum (typically full width at half maximum, FWHM). More precisely, it is the width of the radiated electric field power spectral density, expressed in terms of frequency, wavenumber, or wavelength. The linewidth of a laser is closely related to temporal coherence and is characterized by coherence time and coherence length. If the phase undergoes an unbounded shift, phase noise contributes to the linewidth; this is the case with free oscillators. (Phase fluctuations confined to a very small phase interval produce zero linewidth and some noise sidebands.) Shifts in the resonant cavity length also contribute to the linewidth and make it dependent on the measurement time. This indicates that the linewidth alone, or even a desirable spectral shape (lineform), cannot provide the full information about the laser spectrum.
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.
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