Optical amplifier

Details Optical amplifier Optical amplifier

H - Electricity

01

S

345/12

H01S 3/00 (2006.01) H01S 3/30 (2006.01)

Patent

CA 1245328

OPTICAL AMPLIFIERS Abstract of the Disclosure Use is made of stimulated Raman emission to induce gain in an optical signal (13) of a first wavelength. The optical signal (13) and a pump signal (14) are synchronously coupled to a length of optical fibre (15). The pump signal is at a second wavelength. The first wavelength corresponds to one Stokes shift from the pump signal. The pump signal is generated by a semiconductor laser (11) and thus only relatively low pump powers are involved in comparison with the conventional use of YAG lasers as the pumps, however significant gain is achieved despite the low pump powers. Preferably the optical fibre (15) has a high Raman cross-section and a low transmission loss, for example GeO2 doped SiO2 or pure GeO2.

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