Beam steering element and associated methods for mixed manifold fiberoptic switches

• US 20090110349A1
• Filed: 10/30/2007
• Published: 04/30/2009
• Est. Priority Date: 11/07/2006
• Status: Active Grant

• Current Assignee: Lumentum Operations, LLC (Lumentum Holdings Inc.)
• Original Assignee: Olympus Microsystems America, Inc. (Olympus Corporation)
• Inventors: Nagy, Michael L., Presley, Harry Wayne
• Granted Patent: US 8,000,568 B2
• Time in Patent Office: Days
• US Class Current: 385/17
• CPC Class Codes: G02B 2006/1215 Splitter
• CPC Class Codes: G02B 6/29311 Diffractive element operating in transmission
• CPC Class Codes: G02B 6/29313 characterised by means for controlling the position or direction of light incident to or leaving the diffractive element, e.g. for varying the wavelength response switching G02B6/35
• CPC Class Codes: G02B 6/29373 utilising a bulk dispersive element, e.g. prism
• CPC Class Codes: G02B 6/2938 for multiplexing or demultiplexing, i.e. combining or separating wavelengths, e.g. 1xN, NxM
• CPC Class Codes: G02B 6/29395 configurable, e.g. tunable or reconfigurable switching G02B6/35
• CPC Class Codes: G02B 6/3518 the reflective optical element being an intrinsic part of a MEMS device, i.e. fabricated together with the MEMS device MEMS devices in general B81B; manufacture of MEM devices in general B81C; micromechanical devices controlling the direction of light G02B26/0833
• CPC Class Codes: G02B 6/3548 1xN switch, i.e. one input and a selectable single output of N possible outputs
• CPC Class Codes: G02B 6/356 in an optical cross-connect device, e.g. routing and switching aspects of interconnecting different paths propagating different wavelengths to (re)configure the various input and output links switching polarized beams G02B6/3594; power equalizers G02B6/356 and G02B6/3594; path selecting means H04Q11/0001
• CPC Class Codes: G02B 6/357 Electrostatic force electrostatic forces controlling reflecting elements in general G02B26/0841
• CPC Class Codes: G02B 6/3586 Control or adjustment details, e.g. calibrating testing optical equipment G01M11/00
• CPC Class Codes: G02B 6/3592 Means for removing polarization dependence of the switching means, i.e. polarization insensitive switching light guides coupling with polarization selective and adjusting means G02B6/27
• CPC Class Codes: G02B 6/3594 Characterised by additional functional means, e.g. means for variably attenuating or branching or means for switching differently polarized beams
• CPC Class Codes: G02B 6/3596 With planar waveguide arrangement, i.e. in a substrate, regardless if actuating mechanism is outside the substrate

Abstract

An optical system comprising two or more mixed optical switches co-packaged together, each set configured either with N input fiber ports and 1 output fiber port (N×1 optical switch) or with 1 input fiber port and N output fiber ports (1×N optical switch), wherein at least a first array of MEMS mirrors is utilized to select and switch selected wavelengths from the input fiber ports to an output fiber port of the same set, and wherein at least a second array of MEMS mirrors using and sharing the same free space optics as the first MEMS array is utilized to select and switch selected wavelengths between input and output ports belonging to another set; and wherein output fiber ports from one set can be coupled to input ports of other sets, thus, enabling a cost effective, high level of integration one or more N×M co-packaged optical switching system.

Claims

1. An optical system comprising two or more optical switches for switching one or more optical signals, the signals comprising one or more optical wavelengths, each optical wavelength constituting a work piece, each said optical switch comprising:

at least one input fiber port, each said input fiber port serving as an external interface for introducing the at least one input optical signal into a first said optical switch of said two or more optical switches;

at least one output fiber port, said output fiber port serving as an external interface for extracting the output optical signal from said first optical switch of said two or more optical switches;

at least one shared arrayed switching element for receiving at least one wavelength from said at least one input fiber port and for switching the at least one wavelength from one of said at least one input fiber port to one of said at least one output fiber port according to a state of at least one switch of said at least one shared arrayed switching element;

at least one shared wavelength dispersive element for spatially separating at least one first wavelength of the input optical signal from at least one other wavelength of the input optical signal and for recombining at least one first wavelength of the output optical signal with at least one other wavelength of the output optical signal;

at least one shared arrayed steering element for steering the at least one wavelength from at least one said input fiber port onto said at least one shared arrayed switching element, and for steering the at least one wavelength from said at least one shared arrayed switching element to said at least one output fiber port;

one or more shared optical elements, wherein each said optical element focuses the optical signals of said at least one input fiber port and said at least one output fiber port; and

wherein said one or more shared elements are adapted to be utilized by each said optical switch of said two or more optical switches.

2. The system of claim 1, wherein at least one of said two or more optical switches further comprises one or more input fiber ports and one output fiber port, and wherein at least one other optical switch of said two or more optical switches further comprises one input fiber port and one or more output fiber ports.

3. The system of claim 1, adapted to change direction of said at least one optical signal through said two or more optical switches further comprises a first optical switch wherein said at least one input fiber port further comprises one or more output fiber ports, and wherein said at least one output fiber port further comprises one input fiber port, and further comprises one other optical switch, wherein said at least one input fiber port of said other optical switch further comprises one output fiber port and wherein said at least one output fiber port of said other optical switch further comprises one or more input fiber ports.

4. The system of claim 2, wherein said first optical switch further comprises at least one wavelength from a group of said one or more input fiber ports, said at least one wavelength being switched to said one output fiber port.

5. The system of claim 2, wherein said one other optical switch further comprises at least one wavelength from said one input fiber port, said at least one wavelength being switched to one fiber of a group of said one or more output fiber ports.

6. The system of claim 2, wherein said output fiber port of said first optical switch is coupled to said one input fiber port of said one other optical switch.

7. The system of claim 6, wherein said first optical switch further comprises at least one wavelength from said one or more input fiber ports, said at least one wavelength being switched to said one output fiber port, and wherein said one other optical switch further comprises at least one wavelength from said one input fiber port, said at least one wavelength being switched to said one or more output fiber ports.

8. The system of claim 6, wherein said at least one wavelength of any of said one or more input fiber ports of said first optical switch is switched to any one of said one or more output fiber ports of said one other optical switch.

9. The system of claim 2, wherein each said at least one shared arrayed steering element further comprises one or more facets, wherein each said facet is configured to position the at least one wavelength from said at least one input fiber port onto said at least one switch in said shared arrayed switching element, and is further configured to position the at least one wavelength from said at least one switch to said at least one output fiber port.

10. The system of claim 2, wherein each said at least one shared arrayed steering element further comprises one or more focal points, wherein each said at least one shared arrayed steering element steers one first set of wavelengths from any of said one or more input fiber ports onto a first said switch of said at least one switch of said at least one shared arrayed switching element and steers at least one other set of wavelengths from any of said one or more input fiber ports onto at least one other said switch of said at least one switch of said at least one shared arrayed switching element.

11. The system of claim 10, wherein each said at least one shared arrayed steering element further steers one set of reflected wavelengths from any said switch of said at least one shared arrayed switching element to said at least one shared wavelength dispersive element.

12. The system of claim 2, wherein said one or more optical elements further comprises front end optics, wherein said front end optics is positioned between said one or more input and output fiber ports and said at least one shared wavelength dispersive element, and wherein said front end optics conditions the input optical signals of said one or more input fiber ports with desirable properties for free-space propagating beams and conditions the output optical signals, for insertion into said one or more output fiber ports.

13. The system of claim 2, further comprising a controller wherein said controller controls the at least one wavelength switching route between said one or more input fiber ports and said one output fiber port of said first optical switch by operating at least one first said switch of said at least one shared arrayed switching element, and said controller further controls the at least one wavelength switching route between said one input fiber port and said one or more output fiber ports of said one other optical switch by operating at least one other said switch of said at least one shared arrayed switching element.

14. The system of claim 1, wherein each said at least one shared arrayed steering element further steers any set of the at least one wavelength from any point in one said optical switch to any other point in the same said optical switch.

15. The system of claim 1, wherein said at least one shared arrayed switching element is selected from a group consisting of mirrors, liquid crystals, liquid crystals on silicon, a liquid crystal array, and combinations thereof.

16. The system of claim 6, wherein said couple is selected from a group consisting of external fiber, waveguides, internal mirror, and combinations thereof.

17. The system of claim 2, wherein at least one of said one or more output fiber ports of said one other at least one optical switch is coupled to at least one of said one or more input fiber ports of said first optical switch.

18. The system of claim 17, wherein a change in direction of said optical signals through said one or more optical switches further comprises at least one wavelength of said one input fiber port is switched to one of said one or more output fiber ports of said one other at least one optical switch and wherein the at least one wavelength is further switched from said one or more input fiber ports to said one output fiber port of said first optical switch.

19. The system of claim 2, wherein said at least one output fiber port of said first at least one optical switch of said two or more optical switches is coupled to said one input fiber port of said one other optical switch, wherein together, said two said optical switches comprise an integrated optical switch having a plurality of input fiber ports and a plurality of output fiber ports.

20. A method for co-packaging two or more optical switches and for switching one or more optical signals, the signals comprising one or more optical wavelengths, each optical wavelength constituting a work piece, and wherein said optical switches share common elements, said method comprising the steps of:

introducing at least one input optical signal into at least one input fiber port;

extracting at least one output optical signal from at least one output fiber port;

grouping one or more input fiber ports and one output fiber port into a first optical switch of said two or more optical switches;

grouping one input fiber port and one or more output fiber ports into one other optical switch of said two or more optical switches;

coupling said one output fiber port of said first optical switch to said one input fiber port of said one other optical switch;

projecting the at least one input optical signal from said at least one input fiber port into free space and receiving at least one output optical signal into said at least one output fiber port within each said optical switch;

dispersing spectrally and spatially at least one first wavelength of the input optical signal from at least one other wavelength of the input optical signal, and recombining at least one first wavelength of the output optical signal with at least one other wavelength of the output optical signal, by utilizing at least one shared dispersive element;

switching the at least one wavelength of said one or more wavelengths from at least one of said one or more input fiber ports to said output fiber port within said first optical switch by utilizing a first switch of a shared arrayed switching element and switching the at least one wavelength from said one input fiber port to one of said one or more output fiber ports within said one other optical switch by utilizing one other switch of said shared arrayed switching element;

steering the at least one wavelength from any of said one or more input fiber ports onto said first switch and steering the at least one wavelength from said first switch to said one output fiber port within said first optical switch, by utilizing at least one shared arrayed steering element and further steering the at least one wavelength from said one input fiber port onto said one other switch and further steering the at least one wavelength from said one other switch to one of said one or more output fiber ports within said one other optical switch, by utilizing said at least one shared arrayed steering element; and

,

wherein said one or more shared elements are adapted to be utilized by each said optical switch of said two or more optical switches.

21. The method of claim 20, wherein said steering further comprises one or more facets, and further comprising the step of utilizing each said one or more facet to position at least one wavelength of the dispersed optical signals from any of said one or more input fiber ports onto said first switch and to position the at least one wavelength from said first switch to said one output fiber port within said first optical switch, and further to position at least one wavelength of the dispersed optical signals from said one input fiber port onto said one other switch and further position the at least one wavelength from said one other switch to one of said one or more output fiber ports within said one other optical switch.

22. The method of claim 20, wherein said steering further comprises one or more focal points, and further comprising the step of utilizing said one or more focal points to steer at least one wavelength of the dispersed optical signals from any of said one or more input fiber ports onto said first switch and to steer the at least one wavelength from said first switch to said one output fiber port within said first optical switch, and further to steer at least one wavelength of the dispersed optical signals from said one input fiber port onto said one other switch and further steer the at least one wavelength from said one other switch to one of said one or more output fiber ports within said one other optical switch.

23. The method of claim 20, further comprising the step of focusing the at least one wavelength of the dispersed optical signals from any of said one or more input fiber ports onto said first switch and to focus the at least one wavelength from said first switch to said one output fiber port within said first optical switch, and further to focus at least one wavelength of the dispersed optical signals from said one input fiber port onto said one other switch and further focus the at least one wavelength from said one other switch to one of said one or more output fiber ports within said one other optical switch.

24. The method of claim 20, further comprising the step of utilizing a shared control element to control a switching route of at least one wavelength between any of said one or more input fiber ports of said first optical switch to any one of said one or more output fiber ports of said one other optical switch.

25. A method for co-packaging two or more optical switches, for switching one or more optical signals, the signals comprising one or more optical wavelengths, each optical wavelength constituting a work piece, wherein said switches share common elements, said method comprising the steps of:

obtaining a first optical switch comprising a discrete set of one or more input signal carriers and one output signal carrier and obtaining one other optical switch comprising a discrete set of one input signal carrier and one or more output signal carriers, wherein each said input signal carrier serves as an external interface for introducing the input optical signal and wherein each said output signal carrier serves as an external interface for extracting the output optical signal;

dispersing the optical signals spectrally and spatially into a plurality of wavelengths within said one or more optical switches by utilizing at least one shared dispersive element;

switching the at least one wavelength of said one or more wavelengths from at least one of said one or more input signal carriers to said output signal carrier within said first optical switch, by utilizing a first switch of a shared arrayed switching element and switching the at least one wavelength from said one input signal carrier to one of said one or more output signal carriers within said one other optical switch, by utilizing one other switch of said shared arrayed switching element;

steering the at least one wavelength from any of said one or more input fiber ports onto said first switch and steering the at least one wavelength from said first switch to said one output fiber port within said first optical switch, by utilizing at least one shared arrayed steering element and further steering the at least one wavelength from said one input fiber port onto said one other switch and further steering the at least one wavelength from said one other switch to one of said one or more output fiber ports within said one other optical switch, by utilizing said at least one shared arrayed steering element; and

,

wherein said one or more shared elements are adapted to be utilized by each said optical switch of said two or more optical switches.