Dynamic holography for optical interconnections. I. Noise floor of low-cross-talk holographic switches.

Reconfigurable optical interconnects constructed by recording dynamic holograms onto spatial light modulators may be crucial elements in all-optical networks. The extremely low cross-talk level of such free-space holographic switches was shown by an analytic approximation and verified experimentally. The fiber-to-fiber switch utilizes the spatial filtering properties of single-mode fibers, and its cross-talk noise is limited to the sidelobe power as a result of diffraction of the clipped Gaussian beam at the hologram aperture edges, provided that all higher orders are avoided. Greater than 45-dB cross-talk isolation has been measured at transverse-axis locations, and locating a fiber port at off-transverse-axis directions promises to double this level if aberrations are negligible.

[1]  D. Gloge.  Weakly guiding fibers. , 1971, Applied optics.

[2]  B. Deloach,et al.  Alignment of Gaussian beams. , 1984, Applied optics.

[3]  Dominic C. O'Brien,et al.  Computer-generated holograms optimized for illumination with partially coherent light using silicon backplane spatial light modulators as the recording device , 1991, Other Conferences.

[4]  B Robertson,et al.  Dynamic holography for optical interconnections. II. Routing holograms with predictable location and intensity of each diffraction order. , 2001, Journal of the Optical Society of America. A, Optics, image science, and vision.

[5]  W. Crossland,et al.  A COMPARISON OF THE EFFICIENCY AND CROSSTALK OF QUATERNARY AND BINARY PHASE-ONLY HOLOGRAMS BASED ON FERROELECTRIC LIQUID CRYSTALS (FLC) , 1998 .

[6]  D C O'Brien,et al.  Dynamic holographic interconnects that use ferroelectric liquid-crystal spatial light modulators. , 1994, Applied optics.

[7]  D. Marcuse.  Loss analysis of single-mode fiber splices , 1977, The Bell System Technical Journal.

[8]  William A. Crossland,et al.  High-performance spatial light modulator , 1991, Optics & Photonics.

[9]  S. H. Lee,et al.  Two-dimensional spatial light modulators: a tutorial , 1990, Proc. IEEE.

[10]  D M Cottrell,et al.  Programmable optical interconnections with large fan-out capability using the magneto-optic spatial light modulator. , 1989, Optics letters.

[11]  M. J. Birch,et al.  High performance spatial light modulators , 1991 .

[12]  Robert J. Mears,et al.  Optically transparent digitally tunable wavelength filter , 1995 .

[13]  Allan W. Snyder,et al.  Fundamental (HE 11 ) modes of graded optical fibers , 1979 .

[14]  P. Bayvel,et al.  The influence of aperture size and shape on crosstalk level in free-space grating demultiplexers for WDM networks , 1996, IEEE Photonics Technology Letters.

[15]  M. J. Holmes,et al.  Low crosstalk devices for wavelength-routed networks , 1995 .