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US 2002/0163710 A1Published application
Composite optical amplifier
OwnerAndrew Ellisinventor
Life of this patent
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Abstract
An optical signal amplifier has a first optically-pumped amplifier for amplifying an optical signal passed therethrough, and a further optical amplifier coupled to the first amplifier for providing a gain to further amplify the optical signal after it has passed through the first amplifier. The gain of the further optical amplifier is clamped to induce lasing to provide pump radiation to the first amplifier to amplify the optical signal, and the first optically-pumped amplifier comprises a Raman amplifier.
Claims19
An optical signal amplifier comprising:
- (i) a first optically-pumped amplifier for amplifying an optical signal passed therethrough;
- and
- (ii) a further optical amplifier coupled to said first amplifier for providing gain to further amplify said optical signal after it has passed through said first amplifier, said gain of said further optical amplifier being clamped to induce lasing to provide pump radiation to said first amplifier to amplify said optical signal;
- wherein said first optically-pumped amplifier comprises a Raman amplifier.
1 more element
A method for amplifying an optical signal, the method comprising the steps of:
- (i) providing a Raman gain medium;
- (ii) conducting at least one optical signal through said Raman gain medium;
- (iii) providing a further optical amplifier having a particular gain;
- (iv) amplifying said optical signal after it has passed through said Raman gain medium by means of said further optical amplifier;
- and
- (v) clamping said gain of said further optical amplifier to induce lasing to provide pump radiation to said Raman gain medium to amplify said optical signal.
3 more elements
Dependencies are inferred from the claim text.