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1. (WO2017149319) FOUR WAVE MIXING TRANSMISSION LINE

Pub. No.:    WO/2017/149319    International Application No.:    PCT/GB2017/050572
Publication Date: Sat Sep 09 01:59:59 CEST 2017 International Filing Date: Sat Mar 04 00:59:59 CET 2017
IPC: H03F 3/189
H03F 7/00
H03F 19/00
H03F 3/54
Applicants: OXFORD UNIVERSITY INNOVATION LIMITED
Inventors: TAN, Boon Kok
Title: FOUR WAVE MIXING TRANSMISSION LINE
Abstract:
A four-wave mixing transmission line (3) including: an input (15, 17, 19) arranged to receive: a first pump signal (7a) having a first pump frequency; a second pump signal (7b), having a second pump frequency, different to the first pump frequency; and an input signal to be amplified (5); a non-linear medium (3a) having an intrinsic dispersion relationship, the medium (3a) arranged to allow interaction between the input signal (5), the first pump signal (7a) and the second pump signal (7b), such that the input signal (5) is amplified and an idler signal (9) is generated and amplified; and a plurality of dispersion control elements (31, 33, 49), the dispersion control elements (31, 33, 49) arranged to alter the dispersion relationship of the medium (3a) to diverge from the intrinsic dispersion relationship at one or more frequencies, such that the total phase difference between the input signal, (5) the first pump signal (7a), the second pump signal (7b) and the idler signal (9) is kept at zero or substantially zero as the first pump signal (7a), the second pump signal (7b), the input signal (5) and the idler signal (9) propagate down the transmission line (3).