General Photonics Corporation

Agere Systems Inc.

Triquint Technology Holding Co.

Yongqiang Shi

X Steve Yao

Jane Chen

Lianshan Yan

Frank F Judd

Techniques and devices for depolarizing light and producing a variable differential group delays in optical signals. In one implementation, an input optical beam is split into first and second beams with orthogonal polarizations. One or two optical reflectors are then used to cause the first and second optical beams to undergo different optical path lengths before they are recombined into a single output beam. An adjustment mechanism may used implemented to adjust the difference in the optical path lengths of the first and second beams to produce a variable DGD. When the depolarization of light is desired, the difference in the optical path lengths of the first and second beams is set to be greater than the coherence length of the input optical beam.

Optical depolarizers and DGD generators based on optical delay

Techniques and systems for dynamically controlling polarization of an optical signal by using various feedback controls, and by combining both feed-forward and feedback controls. Various dynamic control algorithms for such systems and other optical systems have been disclosed.

Methods and systems for dynamic control of polarization of an optical signal

Devices and techniques for monitoring spectrum of light. For example, a fiber spectral monitoring device and associated technique are described for monitoring spectral information in light based on an interferometer design.

Optical spectrum monitor

The present invention provides an optoelectronic device, a method of manufacture therefore, or an optical communications system including the optoelectronic device. The optoelectronic device may include a substrate and a waveguide located within the substrate. Additionally, the waveguide may include a first portion having a width, depth, and refractive index, and a second portion having a different width, depth and refractive index.

Optoelectronic device and a method of manufacture thereof

The present invention provides a device, a method of making the device, and a system incorporating the same. In one embodiment, the device includes a substrate that has first and second opposing surfaces and first and second thicknesses, wherein the second thickness is less than the first thickness, and the first surface is substantially planar. The device further includes a conductive trace having an input end and an output end and located over the first surface of the substrate, wherein at least one of the input end or output end is aligned with the second substrate thickness.

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Diamond Bar, CA, United States of America

Yongqiang Shi