Control of a free space adaptive optical interconnect using a VCSEL array transmitter and FLC SLM for beam steering
A demonstrator system for a free space adaptive optical interconnect is reported in which beam position at the receiver plane is maintained using feedback control, given disturbances to the alignment of the optical system. A Liquid Crystal Spatial Light Modulator (SLM) displaying binary phase gratin...
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| Aineistotyyppi: | Conference item |
| Julkaistu: |
2004
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| Yhteenveto: | A demonstrator system for a free space adaptive optical interconnect is reported in which beam position at the receiver plane is maintained using feedback control, given disturbances to the alignment of the optical system. A Liquid Crystal Spatial Light Modulator (SLM) displaying binary phase gratings is used to steer the beam. The design and implementation of the controller is presented, and shown in experimental results to completely correct for step disturbances within one to two sample periods. Extension of the system to tolerate random vibrations is also considered, both in terms of the required SLM technology, and design of the control algorithms. The discussion also highlights some of the trade offs in choosing components when designing for tolerance to different levels of vibration. |
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