The present invention provides modular optical amplifier constituents suitable for
constructing optical amplifiers of various designs and modular fiber optic cassettes. Each …

The present invention provides a structure for Raman amplification of signals with counter-
propagation of signal and pump and wavelength control while permitting broad bandwidth …

A Raman amplifier assembly includes a Raman amplifier configured to receive a signal from
a signal source. The signal travels in an upstream direction in the Raman amplifier. A first …

Continuously tunable and precisely wavelength-switchable fiber lasers combine fiber Bragg
gratings and the transmissive filtering properties of high finesse fiber Fabry-Perot filters. This …

A broadband fiber transmission system includes a transmission line with at least one zero
dispersion wavelength λ o and transmits an optical signal of λ. The transmission line …

A method of broadband amplification divides an optical signal of wavelength of 1430 nm to
1620 nm at a preselected wavelength into a first beam and a second beam. The first beam is …

2012-03-28 Assigned to XTERA COMMUNICATIONS, INC. reassignment XTERA
COMMUNICATIONS, INC. RELEASE BY SECURED PARTY (SEE DOCUMENT FOR …

Raman amplification,” Electronics Letters, vol. 35, No. 14, FOREIGN PATENT DOCUMENTS
pp. 1175–1176, Jul. 8, 1999. EP O841 764 A2 5/1998........... HO4B/10/24 Manna et …

[57] ABSTRACT A distributed gain medium. such as an optical? ber. is con? gured as a
Sagnac interferometer or loop mirror. and this mirror is used as at least one of the two re …

A multi-stage optical amplifier includes an optical fiber with at least a first Raman amplifier
fiber and a second Raman amplifier fiber. The optical fiber is configured to be coupled to at …