Patent ID: 7430354
Filing Date: 2008-09-30
Classification: G02B

Abstract:
1. An optical amplifier comprising: an optical gain medium connected to an input optical fiber and an output optical fiber; an optical coupler connected to the optical gain medium between the input and output optical fibers; a pump member optically coupled to the optical gain medium via a first filter member to deliver a pump laser light to the optical gain medium, the first filter member including a first length portion and a second length portion, wherein the second length portion is proximate a location where the pump member is optically coupled to the first filter member and a light-absorbing coating is applied to the second length portion and is not applied to the first length portion; and a photodetector optically coupled to the optical coupler via a second filter member, wherein the photodetector receives an optical signal and produces an electrical signal proportional to the optical signal.