Optical: systems and elements – Optical amplifier – Optical fiber
Patent
1998-08-25
1999-12-07
Hellner, Mark
Optical: systems and elements
Optical amplifier
Optical fiber
359349, H01S 300
Patent
active
05999309&
ABSTRACT:
An optical pulse amplifier includes: a first optical coupler, having first, second, third and fourth ports, for outputting an optical pulse incident onto the first port to the second and third ports, and for outputting the optical pulse re-incident from the second and third ports to the fourth port; a first grating connected to the second port of the first optical coupler for reflecting the incident optical pulse for each wavelength at a position satisfying the Bragg condition; a second grating, connected to the third port of the first optical coupler and having the same optical characteristics as the first grating, for reflecting the incident optical pulse for each wavelength at a position satisfying the Bragg condition; an optical amplifying portion, connected to the fourth port of the first optical coupler, for amplifying the optical pulse reflected by the first and second gratings and output by the fourth port of the first optical coupler; and a second optical coupler, having first, second, third and fourth ports, for outputting the optical pulse incident from the optical amplifying portion connected to the first port to the second and third ports, respectively, connected to the first and second gratings, and the optical pulse re-incident after being reflected by the first and second gratings to the fourth port. Therefore, a non-linear effect and a spectral hole burning effect can be avoided through amplification and broadening of the optical pulse, there is less diffraction loss, and manufacture of the optical pulse amplifier is easy.
REFERENCES:
patent: 5499134 (1996-03-01), Galvanauskas et al.
patent: 5847863 (1998-12-01), Galvanauskas et al.
patent: 5872649 (1999-02-01), Byron et al.
patent: 5887091 (1999-03-01), Jabr et al.
patent: 5917635 (1999-06-01), Cvijetic et al.
Bushnell Esq. Robert E.
Hellner Mark
Samsung Electronics Co,. Ltd.
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