Molex Corporation

Yi Liao

Gongjian Hu

Lifu Gong

Tian Zhu

Guijun Ji

Hongwei Mao

Glenn E Lee

Guojiang Hu

An optical signal transmission apparatus and a method are provided. The apparatus may include a set of optical transmitters, each optical transmitter configured for transmission of light signals at one or more wavelengths of light. The apparatus may include an output port configured for transmission of the light signals through a span of optical fiber. The apparatus may use an input port configured to receive other transmissions of light signals through the span of optical fiber. The apparatus may include a set of light detectors, each light detector configured to detect a time delay or phase characteristic associated with the one or more wavelengths of light. The apparatus may include a processor configured to determine a metric based on the detected time delay or phase characteristic.

Dispersion monitor apparatus

Various methods, systems, and apparatuses, for optical switching are provided. For example, one wavelength selective switch (WSS) includes a plurality of optical ports wherein one or more optical ports are configured to receive one or more input optical beams the one or more input optical beams having a plurality of wavelength channels and wherein one or more of the optical ports are configured to receive one or more wavelength channels of the plurality of wavelength channels for output. The WSS also includes a polarization conditioning assembly, a polarization beam splitter assembly, a direction dependent polarization rotator, a polarization beam splitter, a grating, and a polarization modulator array having a plurality of polarizing modulation cells, each cell configured to independently change a polarization orientation of an optical beam passing through the cell.

Wavelength selective switch

A dynamic gain equalizer (DGE) for an optical communication device and related method which are capable of reducing power variations among wavelength division multiplexing (WDM) signals. The DGE and method use an optical attenuation device configured such that the ratio of pixel gap distance to the channel beam diameter at the point of incident to the optical attenuation device is less than or equal to 0.06. The DGE can produce output signal sets that have ripple increases of less than 0.1 db over the input signal sets.

Dynamic gain equalizer

A wavelength selective switch includes a plurality of optical ports, a polarization conditioning system, a dispersion system, and a switching system. The switching system includes at least one transmissive stage and a reflective polarization modulator. Each transmissive stage has a transmissional polarization modulator and a symmetrical beam polarization separator. The transmissional polarization modulator includes transmissive first cells each being configured to change a polarization orientation of an optical beam passing through the cell. The symmetrical beam polarization separator is configured to redirect the optical beam passing therethrough based upon its polarization. The reflective polarization modulator includes a birefringence section and a reflective section. The birefringence section includes controllable second cells each being configured to convert linear polarization of an optical beam passing therethrough to circular polarization and to independently and selectively convert circular polarization of the optical beam passing through the second cell to linear polarization.

Apparatus for optical switching with transmissional and reflective polarization modulators

An optical communication device and related method are provided for reducing power variations among wavelength division multiplexing (WDM) signals. The device includes a dynamic gain equalizer (DGE) coupled to an optical communication path carrying WDM optical signals. The DGE is controlled in response to signals generated by an optical channel monitor (OCM). The OCM monitors signals coming into the DGE and monitors the signals leaving the DGE to thus monitor the WDM spectrum for optical signal power variations and adjust the DGE to reduce the signal power variations.

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San Jose, CA, United States of America

Yi Liao