T-networks, Inc.

Ciena Corporation

T-newtorks, Inc.

John Kai Andersen

Newton C Frateschi

Jason T Iceman

Ram Jambunathan

Aaron Bond

Mark Childers

Walter Jeffery Shakespeare

Arthur P Massaro, Jr

Jeff Werner

An optical device includes an optical waveguide through which light propagates and a micro-resonator structure including an optical sensor. The micro-resonator is configured to resonate at a wavelength of light that may be transmitted through the optical waveguide. When light at that wavelength is transmitted through the optical waveguide, it resonates in the resonator and is detected by the optical sensor to produce an electrical signal. The optical resonator may be a micro-cylinder, disc or ring resonator and may be coupled to the waveguide via evanescent coupling or leaky-mode coupling. Multiple resonators may be implemented proximate to the waveguide to allow multiple wavelengths to be detected. When the waveguide is coupled to a tunable laser, signals provided by the optical sensor may be used to tune the wavelength of the laser.

Semiconductor micro-resonator for monitoring an optical device

An optical receiver configuration and method of controlling an optical signal receiver adjusts a decision threshold to reduce the bit error rate (BER). The receiver includes a comparator having a data input and a digital data output. An error detection & correction circuit provides an error signal representative of the number of corrected '1's and '0's in the data output from the comparator. Based on the error signal, a control circuit modifies the comparator decision threshold in a direction to reduce the BER of the receiver. Dynamic modification of the decision threshold may also be accomplished. A relative percentage error indicator is preferably used as the basis of changing the decision threshold value. The relative percentage error indicator may be used to determine how much to adjust the decision threshold at each iteration of the method to more quickly arrive at an acceptable decision threshold and prevent overshoot. A searching method may also be used to determine the usable range of the comparator before tuning the decision threshold.

Optical signal receiver and method with decision threshold adjustment based on a relative percentage error indicator

An opto-electronic package is provided for mounting on a module base. The package comprises a generally rectangular package. An optical connector extends from a first side of the package body along an optical axis, generally parallel to the module base. A radio frequency connector extends from a second side of the package body along a RF axis, generally parallel to the module base. A plurality of electronic leads and mounting tabs each extend from at least one of the second side and a third side of the package body. A fourth side of the package body is adjacent the first side and free of connectors, leads, and mounting tabs for mounting the package in a corner of the module formed by first and second module walls. The fourth wall of the package body is positioned adjacent the first module wall and the optical connector extends through the second module wall.

Opto-electronic component packaging

An exemplary monolithic stabilized monolithic transmissive active optical device, such as an electroabsorption modulator (EAM), a variable optical attenuator (VOA), or a semiconductor optical amplifier (SOA), with an output optical tap, includes: a substrate; a waveguide layer; a semiconductor layer. The waveguide layer is coupled to the substrate and includes an active medium, which interacts with a predetermined wavelength of light, and is responsive to an electric signal. The electric signal is applied between the substrate and the semiconductor layer. The waveguide layer includes an output optical tap section and an active section adjacent to the output optical tap section. These sections include portions of the active medium. Further embodiments of the present invention incorporate temperature as well as bias control to improve performance of exemplary monolithic transmissive active optical devices. Additional embodiments include exemplary methods of manufacture and methods of operation.

Stabilizing electro-absorption modulators (EAM's) performance by maintaining constant absorption with the use of integrated tap couplers

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Emmaus, PA, United States of America

John Kai Andersen