US 7,447,444 B2 · Light source in optical transmission system, waveform shaper, optical pulse train generator, and optical reproduction system

Abstract

The present invention provides a pulse train generator comprising: a dual-frequency signal light source for generating a dual-frequency signal; a soliton shaper for soliton-shaping output light from the dual-frequency signal light source; and an adiabatic soliton compressor for performing adiabatic soliton compression on output light from the soliton shaper, and also provides a waveform shaper used in this pulse train generator, including a plurality of highly nonlinear optical transmission lines and a plurality of low-nonlinearity optical transmission lines which has a nonlinearity coefficient lower than that of the plurality of highly nonlinear optical transmission lines and which has a second-order dispersion value of which an absolute value is different from that of the plurality of highly nonlinear optical transmission lines. Further, the present invention provides a light source comprising a plurality of continuous light sources of which at least one oscillates in a multimode; a multiplexer for multiplexing output light from the continuous light sources; and a nonlinear phenomenon producer for producing a nonlinear phenomenon on output light from the multiplexer so as to suppress SBS (Stimulated Brillouin Scattering).

Claims8

Dependent claims

An optical pulse train generator operatively coupled to a light source generating an optical signal, comprising:

a shaper coupled to the light source for shaping the optical signal from the light source to produce a shaped optical signal;
a compressor coupled to the shaper for compressing the shaped optical signal from the compressor to produce a shaped and compressed optical signal in the form of an optical pulse train;
wherein the shaper comprises a first CPF (comb-like profiled fiber) formed by an alternating arrangement of nonlinear medium and dispersion medium;
wherein the compressor comprises a second CPF (comb-like profiled fiber) formed by an alternating arrangement of nonlinear medium and dispersion medium;
wherein the shaper has an average dispersion profile which increases in propagation direction of the optical signal;
and
wherein the compressor has an average dispersion profile which decreases in the propagation direction of the optical signal;
wherein the nonlinear medium is given by LNL<LD, the dispersion medium is given by LNL>LD, and LNL and LD are expressed by an equation:
LD=T02/β2,LNL=1/yp0
where:
To:
pulse 1/e 2 width
P0:
pulse peak power
y:
nonlinearity coefficient
β2:
dispersion value.

15 more elements

Dependencies are inferred from the claim text.

Light source in optical transmission system, waveform shaper, optical pulse train generator, and optical reproduction system

Life of this patent

Light source in optical transmission system, waveform shaper, optical pulse train generator, and optical reproduction system

Life of this patent

Abstract

Claims8