Avago Technologies Fiber IP (singapore) Pte. Ltd

Avago Technologies Fiber IP Pte Ltd.

Falgun D Patel

Jeffrey N Miller

The present invention provides an optical switch including a loss element having a signal loss, and a rare earth doped gain element optically connected in series with the loss element. The rare earth doped gain element is operable to produce a signal gain. The signal gain and the signal loss are about equal. The present invention also provides a method of optical switching including optically connecting a loss element in series with a rare earth doped gain element and passing an optical signal through the loss element and the gain element. The loss element attenuates the optical signal by a first amount. The method further includes selectively applying an optical pump to the gain element to perform the switching, the gain element amplifying the optical signal by the first amount in response to the optical pump.

Optical switch using rare earth doped glass

A flattened gain amplifier has a waveguide with a core doped with at least one species of rare earth ion. The rare earth ion has a gain profile with a first gain in a first wavelength band and a second gain in a second wavelength band. The flattened gain amplifier also has a first grating and a reflective element optically coupled to the core. The positions of the first grating and reflective element along the length define a first amplifying length and a second amplifying length. The ratio of the first amplifying length to the second amplifying length is about equal to the ratio of the second gain to the first gain.

Compact optical amplifier with a flattened gain profile

The optical amplifier has a waveguide including a core and a cladding. The cladding at least partially surrounds the core and is doped with at least one species of rare earth ion in the range of 5 to 75 wt %. In another embodiment, the core is doped with Erin the range of 7 to 9 wt % and with Ybin the range of 11 to 13 wt %.

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Pacifica, CA, United States of America

Falgun D Patel