EP 0870208 A2 19981014 - FIBER OPTIC SYSTEM WITH SIMULTANEOUS SWITCHING AND RAMAN
Title (en)
FIBER OPTIC SYSTEM WITH SIMULTANEOUS SWITCHING AND RAMAN
Title (de)
FASEROPTISCHES SYSTEM, DAS GLEICHZEITIG SCHALTET UND RAMAN VERSTÄRKT
Title (fr)
SYSTEME DE FIBRE OPTIQUE AVEC COMMUTATION ET GAIN RAMAN SIMULTANES
Publication
Application
Priority
- RU 96175406 A 19960709
- US 9711699 W 19970701
Abstract (en)
[origin: WO9801777A2] A fiber optic system in accordance with the present invention includes an optical fiber, a coupling device, and a system for generating a pump signal. The optical fiber has a birefringence which preserves polarization and has a first polarization mode which is substantially perpendicular to a second polarization mode. The coupling device couples an input signal with an input wavelength into the optical fiber so that the input signal propagates in the first polarization mode in the optical fiber. The system for generating a pump signal generates a pump signal with a pump wavelength which is within a range of 50 nanometers (nm) to 300 nm less than the input wavelength and which has a first amount of pump powe which is enough power to switch the input signal, but not enough to create higher order solitons. The coupling device also couples the pump signal into the optical fiber so that the pump signal propagates in the first polarization mode in the optical fiber. The pump signal induces a nonlinear birefringence in the optical fiber which causes the input signal to switch polarization modes and propagate in the second polarization mode, and amplifies the input signal propagating through the optical fiber. Accordingly, with the fiber optic system an input signal can be amplified and sitched concurrently, and thus separate stages for amplification and switching are not required.
IPC 1-7
IPC 8 full level
G02F 1/35 (2006.01); H01S 3/30 (2006.01); H04B 10/2507 (2013.01); H04B 10/291 (2013.01)
CPC (source: EP)
G02F 1/3515 (2013.01); H01S 3/302 (2013.01); H04B 10/25077 (2013.01); H04B 10/2916 (2013.01); G02F 1/3511 (2013.01)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
WO 9801777 A2 19980115; WO 9801777 A3 19990225; AU 3651097 A 19980202; CA 2230686 A1 19980115; CN 1217793 A 19990526; EP 0870208 A2 19981014; EP 0870208 A4 19990915; JP 2000513830 A 20001017
DOCDB simple family (application)
US 9711699 W 19970701; AU 3651097 A 19970701; CA 2230686 A 19970701; CN 97190867 A 19970701; EP 97933289 A 19970701; JP 50528798 A 19970701