High-speed optical interconect demultiplexing at the Fresnel plane

Felipe de Jesus Rivera-Lopez; Carlos G. Trevino-Palacios; Eduardo Tepichin-Rodriguez

doi:10.1117/12.515170

2 October 2003 High-speed optical interconect demultiplexing at the Fresnel plane

Felipe de Jesus Rivera-Lopez, Carlos G. Trevino-Palacios, Eduardo Tepichin-Rodriguez

Proceedings Volume 5264, Optomechatronic Systems IV; (2003) https://doi.org/10.1117/12.515170
Event: Photonics Technologies for Robotics, Automation, and Manufacturing, 2003, Providence, RI, United States

Abstract

High speed remote radio control of systems containing multiple elements is usually performed using control channels for individual elements with multiple emitters and receivers at different conduits. If this signals are multiplexed and transmitted the bandwidth of each individual channel is reduced depending on the number of required channels. We propose a hybrid system that allows demultiplexing on flight time using a spatial light modulator to route the incoming signal into different out ports. The control signals are first multiplexed in frequency and a low speed routing control signal modulates it in amplitude. The combined signal is used to drive a diode laser. The proposed demultiplexing apparatus consists on a double 4f optical system in which the image of a dynamic liquid crystal display is imaged on the Fresnel plane. The control signal displays an amplitude binary mask on the dynamic spatial light modulator to route the signals to individual detectors located at the Fresnel plane in order to recover the individual channels. Afterward each channel is individually recovered. In order to demonstrate this system, multiple CATV signal were multiplexed with a digital control signal used to amplitude modulate the diode laser and tested on an optical bench. We also present the advantages of using such optical interconnects on the Fresnel plane over the Fraunhoffer plane.

Citation Download Citation

Felipe de Jesus Rivera-Lopez, Carlos G. Trevino-Palacios, and Eduardo Tepichin-Rodriguez "High-speed optical interconect demultiplexing at the Fresnel plane", Proc. SPIE 5264, Optomechatronic Systems IV, (2 October 2003); https://doi.org/10.1117/12.515170

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KEYWORDS

Modulators

Control systems

Modulation

Video

Signal processing

Spatial light modulators

Multiplexing

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