Optical amplifiers

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H01S 3/00 (2006.01) G02B 6/42 (2006.01) H01S 5/50 (2006.01) H04B 10/00 (2006.01) H04B 10/17 (2006.01) H01S 5/028 (2006.01) H01S 5/0683 (2006.01)

Patent

CA 1284683

ABSTRACT OF THE DISCLOSURE A semiconductor travelling wave optical amplifier is presented in a new configuration. An amplifier chip has the rear facet provided with a reflective coating. Optical signals are input and amplified signals are output via optical fibres and directional coupler. A single fibre- to-amplifier alignment is required between fibre tail and the front facet. The front facet is provided with a very low reflectivity coating. In this configuration the ampli- fication is increased in comparison with the conventional in-line amplifier configuration.

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