1064nm DFB laser diode Manufacturers

Semiconductor lasers are a type of lasers that mature earlier and are developing rapidly. Because of its wide wavelength range, simple manufacture, low cost, easy mass production, and because of its small size, light weight, and long life, its variety develops quickly and its application The range is wide, and there are currently more than 300 species.

Optical coherence tomography is a low-loss, high-resolution, non-invasive medical imaging technology developed in the early 1990s. It combines optical technology with ultrasensitive detectors. Using modern computer image processing, OCT fills the gap in resolution and imaging depth between microscopes and ultrasound imaging. The imaging resolution of OCT is about 10~15 μm, which is clearer than that of intravascular ultrasound (IVUS), but OCT cannot image through blood. Compared with IVUS, its tissue penetration ability is lower, and the imaging depth is limited to 1-2mm.

The eye diagram is a series of digital signals accumulated and displayed on the oscilloscope. It contains a wealth of information. From the eye diagram, the influence of intersymbol crosstalk and noise can be observed, which reflects the overall characteristics of the digital signal, so as to estimate the system optimization. Therefore, eye diagram analysis is the core of signal integrity analysis for high-speed interconnect systems.

Erbium-doped fiber amplifier (EDFA, that is, an optical signal amplifier with erbium ion Er3 + doped in the core of the signal passing through) is the first optical amplifier developed by the University of Southampton in the UK in 1985. It is the greatest optical amplifier in optical fiber communication. One of the inventions. Erbium-doped fiber is an optical fiber doped with a small amount of rare earth element erbium (Er) ions in a quartz fiber, and it is the core of an erbium-doped fiber amplifier. Since the late 1980s, the research work of erbium-doped fiber amplifiers has continuously made major breakthroughs. WDM technology has greatly increased the capacity of optical fiber communications. Become the most widely used optical amplifier device in current optical fiber communication.