Holographic optical switching: the "ROSES" demonstrator
- 1 December 2000
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in Journal of Lightwave Technology
- Vol. 18 (12) , 1845-1854
- https://doi.org/10.1109/50.908753
Abstract
The design, assembly, and performance of a prototype 1/spl times/8 free-space switch demonstrator using reconfigurable holograms are reported. Central to the switch fabric is a ferroelectric liquid crystal (FLC) on silicon spatial light modulator (SLM) deposited with a 540/spl times/1 array of highly reflective and planar mirror strips. The input and output ports of the switch are fabricated as a linear array of silica planar waveguides connected to single-mode fibers, and the holographic beam-steerer operates without the need for adjustment or dynamic alignment. The waveguide array and the single Fourier transform lens for the 2f holographic replay system are housed in an opto-mechanical mount to provide stability. The switch operates at 1.55 /spl mu/m wavelength and has a designed optical bandwidth of >60 nm. The first measured insertion loss and crosstalk figures are 16.9 dB and -19.1 dB, respectively. Improvements in SLM performance, the use of new addressing schemes and the introduction of better alignment techniques are expected to improve these figures considerably. The preliminary performance of a 3/spl times/3 optical crossconnect is also presented to show that this technology is scalable to N/spl times/N switching fabrics.Keywords
This publication has 12 references indexed in Scilit:
- Recent progress on silica-based thermooptic switches for ADMs/XCsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2003
- Beam steering optical switches using LCOS: The 'ROSES' demonstratorPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Beam steering optical switches using LCOS: the ‘ROSES’ demonstratorPublished by Institution of Engineering and Technology (IET) ,2000
- High tilt angle FLC SLM for optical interconnectsPublished by Institution of Engineering and Technology (IET) ,2000
- Free-space fiber-optic switches based on MEMS vertical torsion mirrorsJournal of Lightwave Technology, 1999
- Introduction to Liquid CrystalsPublished by Taylor & Francis ,1997
- Polarisation insensitive operation of ferroelectricliquidcrystal devicesElectronics Letters, 1995
- Dynamic holographic interconnects that use ferroelectric liquid-crystal spatial light modulatorsApplied Optics, 1994
- Programmable binary phase-only optical device based on ferroelectric liquid crystal SLMElectronics Letters, 1992
- Evolutionary development of advanced liquid crystal spatial light modulatorsApplied Optics, 1989