Calient Technologies, Inc.

Vijayan Thattai

Jitender Miglani

Mike Deacon

Sushma Sagaram

Shifu Yuan

Mchael Deacon

Michael Deacon

Network switches and methods are disclosed. A network switch may include multiple input ports and multiple output ports, a switch fabric, and switch controller. The controller may receive and store data identifying a plurality of users and data defining which input ports and which output ports each user has authority over. The controller may receive, from a requesting user from the plurality of users, a request to make a connection between a selected input port and a selected output port. The controller may determine, based on the stored data, if the requesting user has authority over both the selected input port and the selected output port. The controller may refuse to make the requested connection if the requesting user does not have authority over both the selected input port and the selected output port.

Network switch with hierarchical security

An optical circuit switch, method, and apparatus are disclosed. The optical circuit switch may include a plurality of mirror elements, each mirror element uniquely associated with a port from a plurality of ports, each mirror element coupled to a dedicated electrode and configured to rotate in response to a voltage applied to the dedicated electrode. A command interpreter may receive a command defining a plurality of port-pairs to be connected via the optical circuit switch and determine a respective target voltage value to be applied to the dedicated electrode coupled to each of the mirror elements associated with each of the port-pairs. A transition manager may cause voltages applied to the dedicated electrodes coupled to the mirror elements associated with the port-pairs to concurrently transition from respective previous voltage values to the respective target voltage values.

Making mass connections in an optical circuit switch

An optical circuit switch and method. A first mirror element rotates about orthogonal axes in response to first and second voltages applied respectively to first and second electrodes. A second mirror element rotates about orthogonal axes in response to third and fourth voltages applied respectively to the third and fourth electrodes. A controller may apply first through fourth voltages respectively to the first through fourth electrodes to make a connection between first and second ports. When an initial insertion loss of the connection does not exceed a predetermined threshold, the controller may conduct independent single-dimension searches to determine values for the first through fourth voltages that minimize the insertion loss. When the initial insertion loss exceeds the predetermined threshold, the controller may conduct a four-dimensional search to determine values for the first through fourth voltages that reduce the insertion loss to not exceed the predetermined threshold.

Making connections through an optical circuit switch

A compound optical circuit switches and methods are disclosed. Two or more 1-tier switches may be coupled to one or more 2-tier switches. Each of a plurality of input ports may be connected to a respective input of one of the 1-tier switches and each of a plurality of output ports may be connected to a respective output of one of the 1-tier switches. Each connection between an input port and an output port connected to the same 1-tier switch may be made within the 1-tier switch. Each connection between an input port and an output port connected to two different 1-tier switches is made along a respective connection path through the 1-tier switch connected to the input port, through a selected 2-tier switch, and through the 1-tier switch connect to the output port.

Compound optical circuit switch

Methods of operating an optical circuit switch and optical circuit switches are disclosed. A command to make an optical connection between a first port and a second port may be received. A determination whether or not input signal light is present at the first port may be made. When light is present at the first port, an optical connection may be made between the first port and the second port. When light is not present at the first port, the optical circuit switch may wait until light is present at the first port before making the connection.

Making lightless connections in an optical circuit switch

Methods of operating an optical circuit switch and optical circuit switches are disclosed. To make a connection between a first port and a second port, baseline voltages may be determined, baseline voltages being voltages that, if respectively applied to one or more electrode coupled to a first mirror element uniquely associated with the first port and one or more electrode coupled to a second mirror element uniquely associated with the second port, cause the first and second mirror elements to rotate to make the connection in the absence of accumulated mirror element drift. Accumulated drift data associated with one or both of the first mirror element and the second mirror element may be retrieved from a memory. One or more of the baseline voltages may be modified based on the accumulated drift data to provide corrected voltages, and the corrected voltages may be applied to the electrodes.

Mirror drift compensation in an optical circuit switch

Compound optical circuit switches and methods are disclosed. Two or more 1-tier switches may be configured to make selectable optical connections between a plurality of 1-tier inputs and a plurality of 1-tier outputs. Each 1-tier switch may include input and output power meters to measure optical powers of signals received at the 1-tier inputs and optical powers of signals output from the 1-tier outputs, respectively. At least one 2-tier switch may include plural 2-tier inputs optically connected to respective 1-tier outputs, plural 2-tier outputs optically connected to respective 1-tier inputs, and plural 2-tier rotatable mirror elements to make selectable optical connections from the 2-tier inputs to the 2-tier outputs. A 2-tier switch controller may control positions of at least some of the 2nd-tier mirror elements based on optical power measurement data from the input power meters and the output power meters of the 1-tier switches.

Compound optical circuit switch with shared optical power measurements

Methods of operating an optical circuit switch and optical circuit switches are disclosed. An optical circuit switch may receive a first make command to make a first optical connection between a first port and a second port, the first port uniquely associated with a rotatable mirror element, determine a first baseline voltage to be applied to an electrode coupled to the mirror element to cause the mirror element to rotate about an axis to make the first optical connection, and apply the first baseline voltage to the electrode. The optical circuit switch may periodically adjust the voltage applied to the electrode to minimize an insertion loss of the first optical connection, and periodically store accumulated angular drift data in a memory, the accumulated angular drift data derived from a difference between the adjusted voltage applied to the first electrode and the first baseline voltage.

Methods of operating an optical circuit switch and optical circuit switches are disclosed. A command to make an optical connection between a first port and a second port may be received, the first port uniquely associated with a first rotatable mirror element and the second port uniquely associated with a second rotatable mirror element. A determination whether or not input signal light is present at the first port may be made. When light is present at the first port, the first mirror element and the second mirror may be rotated to provide an initial optical connection between the first port and the second port. When light is not present at the first port, the first mirror element and the second mirror element may be placed in respective at-rest positions.

Growing community of inventors

Goleta, CA, United States of America

Vijayan Thattai