Improved Reach Extension

BTI addresses the complex effects on extending the reach of optical signals such as power, Optical Signal-to-Noise Ratio (OSNR), and Chromatic Dispersion with a portfolio of amplification and dispersion compensation modules.

An optical signal transmitted through optical fiber suffers from attenuation due to the physical characteristics of optical fiber, splice loss and connector loss in the transmission cable. Different technologies can amplify the optical signal to compensate for this attenuation, depending on the operating wavelength.

Erbium-Doped Fiber Amplifiers (EDFA) are used to amplify signals in the DWDM wavelength spectrum (1528 nm to 1615 nm). This is achieved by transferring the energy from power laser diodes at 980 nm or 1480 nm to the optical signal. When the erbium ions within the amplifier are excited to a high energy state the doped fiber changes from a passive medium to an active amplifying medium.

Dispersion is a phenomenon that causes the separation of a wave into spectral components with different wavelengths. There is both material dispersion and waveguide dispersion and both variants may be present within a WDM system. Material dispersion comes from a frequency-dependent response of a material to waves. Waveguide dispersion occurs when the speed of a wave in a waveguide (such as an optical fiber) depends on its frequency for geometric reasons. Their combination leads to signal degradation in optical fibers based on the difference in arrival time between different components of a signal at the receiver.

BTI network technology leverages Dispersion Compensating Fiber (DCF) and Fiber Bragg Grating (FBG) dispersion modules to compensate for the effects of dispersion and improve optical reach performance.

Related Products:

BTI 7000 Series | Reach Extension & Optical Amplifiers

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