Fiber optic amplifier

Details Fiber optic amplifier Fiber optic amplifier

H - Electricity

01

S

H01S 3/10 (2006.01) H01S 3/13 (2006.01) H01S 3/17 (2006.01) H04B 10/17 (2006.01)

Patent

CA 2042697

An optical fiber doped with Er is provided at its both end portions with a pair of 1.25µ m band reflecting filters such that the distance therebetween becomes the resonator length for a light beam of 1.25µ m band. When a pumping light beam of a wavelength of 0.8 µ m band is introduced into the optical fiber, laser oscillation at 1.25µ m band is produced, whereby the energy level of Er in an excited state is lowered and a signal light beam of a wavelength of 1.55µ m band can be optically amplified with high efficiency. Another fiber optic amplifier in which a pair of 0.98µ m band reflecting filters are disposed at both end portions of an optical fiber doped with Yb and Er such that the distance therebetween becomes the resonator length for a light beam of 0.98µ m band is also disclosed.

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