Optical switching, routing, and time delay systems using switched mirrors

• US 6,072,923 A
• Filed: 06/22/1998
• Issued: 06/06/2000
• Est. Priority Date: 04/30/1996
• Status: Expired due to Fees

• Current Assignee: Avago Technologies Fiber IP Singapore PTE Limited (Broadcom, Inc.)
• Original Assignee: Wavefront Research, Inc. (Agilent Technologies, Inc.)
• Inventors: Stone, Thomas W.
• Primary Examiner(s): Ullah, Akm E.
• Application Number:
  US09/102,700
• Time in Patent Office: 715 Days
• Field of Search: 385/16, 385/147, 385/131, 385/132, 385/18, 385/19, 385/20, 385/24, 385/25, 372/12, 359/237, 359/248, 359/291
• US Class Current: 385/16
• CPC Class Codes: G02B 6/2861 using fibre optic delay lines and optical elements associated with them, e.g. for use in signal processing, e.g. filtering delay lines in general H03H, H01P9/00; optical computing devices G06E
• CPC Class Codes: G02F 1/292 by controlled diffraction or phased-array beam steering controlled diffraction for optical switching G02F1/31
• CPC Class Codes: G02F 1/31 Digital deflection, i.e. optical switchingG02F1/33 takes precedence
• CPC Class Codes: G02F 1/3523 Non-linear absorption changing by light, e.g. bleaching
• CPC Class Codes: G02F 2203/12 spatial light modulator

Abstract

Optical switching, routing, interconnection and time delay systems incorporating switchable mirrors in order to overcome problems associated with sensitivity to wavelength of optical carriers, insertion loss, number of required switching devices and control signals switch isolation, noise and crosstalk suppression, spurious reflections, data skew and compactness that are present in previous optical switching, routing, interconnection and time delay systems.

Claims

1. An optical time shifter and routing system comprising:

a first switchable mirror for receiving a beam of electromagnetic radiation and for selectively directing said beam into at least first and second optical paths;

a second switchable mirror interposed within said optical paths for receiving said beam of electromagnetic radiation and selectively directing said beam of electromagnetic radiation following said first optical path into at least third and forth optical paths, and for selectively directing said beam of electromagnetic radiation following said second optical path into at least fifth and sixth optical paths;

each of said optical paths being of a different predetermined length; and

means operably associated with said first and second switchable mirrors for controlling the path taken by said beam of electromagnetic radiation.

2. An optical time shifter and routing system as defined in claim 1 further comprising:

means for detecting said beam of electromagnetic radiation after having passed through a predetermined combination of said optical paths; and

means optically aligned adjacent said detecting means for directing said beam of electromagnetic radiation after having passed through a predetermined combination of said optical paths to said detecting means.

3. An optical time shifter and routing system as defined in claim 2 further comprising means interposed between said directing means and said detecting means for suppressing unwanted signals resulting from the passage of said beam of electromagnetic radiation through said predetermined combination of said optical paths.

4. An optical switching and routing system comprising:

means for receiving at least one incident signal of electromagnetic radiation, said receiving means including n cascaded switching stages, at least one of said switching stages comprises a switchable mirror, and each of said cascaded switching stages having a predetermined separation therebetween,

said predetermined separation between said stages vary from one from another as powers of an integer, said integer being at least 2,

said cascaded switching stages directing said at least one incident signal to at least one of in spathal locations, wherein i is an integer,

and wherein said incident signals propagate through said stages of said switching and routing system in free space.

5. An optical switching and routing system comprising:

a first router assembly, a second router assembly optically aligned with said first router assembly, and a central plane having an optical redirecting component therein interposed between said first router assembly and second router assembly;

said first router assembly being capable of receiving a plurality of individual beams of electromagnetic radiation and having a predetermined orientation, said first router assembly including means defining a plurality of independently controlled segments for directing said plurality of individual beams of electromagnetic radiation from preselected locations along said segments to preselected locations on said optical redirecting component in said central plane;

said second router assembly being different in orientation from said predetermined orientation of said first router assembly, said second router assembly including means defining a plurality of independently controlled segments for receiving each of said individual beams from said optical redirecting component and directing said individual beams for output from said second router assembly; and

at least one of said router assemblies comprising at least one switchable mirror.