Glossary

Thulium-Doped Fiber Amplifier (TDFA)

A thulium-doped fiber amplifier (TDFA) is often used for light amplification in the Near Infra-Red (NIR). Figu …

Population inversion

Population inversion is an important concept for lasers optics, as it is essential for light amplification by …

Telecom network and datacom network

Telecom network is one form of network, primarily aiming for providing various data communication services of …

Guided modes in optical fiber

Understanding light propagation in an optical fiber by ray optics (see “optical fiber“) gives an i …

Total Internal Reflection (TIR)

Total Internal Reflection (TIR) is a phenomenon in optics, by which light experiences complete reflection at a …

Polarization-Maintaining Fiber (PM Fiber, PMF)

Introduction Theoretically speaking, an optical fiber with a circular core has no birefringence, and the polar …

Core pumping and cladding pumping

Fiber lasers/amplifiers are so far always optically pumped, and generally speaking, there are two types of opt …

Praseodymium-Doped Fiber Amplifier (PDFA)

Praseodymium-doped fiber amplifier (PDFA) is one type of rare-earth-doped fiber amplifiers, which operates in …

Optical fiber

Optical fibers are one of the most widely used form of optical waveguide. Unlike other form of waveguides, opt …

L-band

Introduction The L-band, ranging from 1565 nm to 1625 nm, stands for the long-wavelength band (see Figure 1). …

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