Thulium-doped fiber amplifier using pump light for improving...

Total internal reflection (TIR) coupler and method for...

Transfer of repeater information signals in in-line optical ampl

Transmission device connected to optical transmission line

Transmitting supervisory messages from a fiber amplifier

Twin coupler with mode scrambling for multimode pumping of...

Two fiber support with single optical amplifier

Two-stage erbium doped fiber amplifier using remnant pumping...

Two-stage modular wide-band optical amplifiers

Two-way optical amplifier module

Two-way repeater employing optical amplification

Unequal couplers for multimode pumping optical amplifiers

Unidirectional amplification for bi-directional transmission usi

Universal controller for an optical amplifier that operates...

Universal controller for an optical amplifier that operates...

Upgradable, gain flattened fiber amplifiers for WDM...

Upgradable, gain flattened fiber amplifiers for WDM...

Variable gain optical amplifiers

Variable gain optical amplifiers

Wavelength dependent crossover system for bi-directional transmi