Optical waveguides – Having nonlinear property
Patent
1992-06-23
1993-08-24
Gonzalez, Frank
Optical waveguides
Having nonlinear property
385142, 359341, 359342, 359346, 359347, 359348, 359349, 372 6, 372 94, 372 96, 372703, H01S 330, G02B 626
Patent
active
052396070
ABSTRACT:
An apparatus and method for flattening the gain of an optical fiber amplifier (18) doped with an ion such as erbium and which is pumped by a pump laser (20). Optical couplers (32, 34) inserted before and after the fiber amplifier couple the main optical path to an optical ring passing through the fiber amplifier so as to form a ring laser. An optical isolator (32) placed in the ring causes the lasing light to only counterpropagate relative to the optical signal being amplified. When the fiber amplifier primarily exhibits inhomogeneous broadening and the ring lases, the lasing light clamps the gain to a value determined by the loop loss, and the value of the clamped gain is relatively uniform across a wide bandwidth.
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patent: 5155780 (1992-10-01), Zirngibl
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da Silva Valeria L.
Silberberg Yaron
Bell Communications Research Inc.
Gonzalez Frank
Suchyta Leonard Charles
White Lionel N.
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