Experimental Demonstration of a Holographic Demultiplexer With Low Polarization-Dependence Loss Using a Long-Period Diffraction Grating

An, Jun Won

doi:10.1109/lpt.2007.894283

Cited by 2 publications

(2 citation statements)

References 7 publications

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“…There are several technologies for multiplexing and demultiplexing analog and digital information that can be integrated in WVLC systems in order to increase the channel capacity. The technologies used are: thin-film filters, arrayed waveguide gratings, fiber Bragg gratings, free-space diffraction gratings and the integrated holographic Bragg reflector [10]. Among the technologies mentioned above, free-space diffraction gratings have shown great potential due to their compactness, high performance and low cost [11,12].…”

Section: Introductionmentioning

confidence: 99%

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An experimental distribution of analog and digital information in a hybrid wireless visible light communication system based on acousto-optic modulation and sinusoidal gratings

Colin

García-Juárez

Zaldívar-Huerta

et al. 2016

J. Opt.

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In this paper we propose a photonic architecture as an alternative tool to distribute point to multipoint analog and digital information over a hybrid wireless visible optical communication system. The experimental set-up is composed of a red laser pointer, an acousto-optic modulator, a sinusoidal grating and a photo-detector array. By using a simple and variable interferometric system, diffraction gratings with different spatial frequencies are generated and recorded on a photoemulsion which is composed of vanilla with dichromate gelatin. Analog video and digital information are first transmitted and recovered over a wireless communication system using a microwave carrier at 4.52 GHz which is generated by distributed feedback lasers operating in the low laser threshold current region. Separately, the recovered video information and digital data are combined with a radio frequency signal of 80 MHz, obtaining a subcarrier of information that is imposed on the optical carrier of the pointer laser using an acousto-optic modulator which is operated with an angle of incident light that satisfies the Bragg condition. The modulated optical carrier is sent to a sinusoidal grating, the diffraction pattern is photo-detected using an array of PIN photo-detectors. The use of sinusoidal gratings with acousto-optic modulators allows that number of channels to be increased when both components are placed in cascade.

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Section: Introductionmentioning

confidence: 99%

“…It is evident that if there are many grating periods within the aperture, then f w 1 , o  / and there will be a negligible overlap of the three sinc functions, allowing the intensity to be calculated as the sum of the squared magnitudes of the three terms in equation (10). Then the corresponding intensity ( )…”

mentioning

confidence: 99%

An experimental distribution of analog and digital information in a hybrid wireless visible light communication system based on acousto-optic modulation and sinusoidal gratings

Colin

García-Juárez

Zaldívar-Huerta

et al. 2016

J. Opt.

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Wireless transmission of audio signals and temperature data using an optoelectronic system

Sabory-García,

García-Delgado,

Noriega

et al. 2024

Review of Scientific Instruments

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This work presents an optoelectronic instrument designed for wireless visible light communication (WVLC) systems, operating within a wavelength range of 380–750 nm and compatible with standard radio frequency (RF) communication. The instrument encompasses two distinct architectures. The first enables the transmission and reception of RF-processed audio signals through a three-stage process involving RF signal transmission via Bluetooth, signal multiplexing using acousto-optic modulation, a sinusoidal grating, a PIN photodetector array, and final audio playback. The second architecture focuses on the wireless transmission and reception of temperature data, utilizing a similar three-stage approach that includes temperature data measurements with an LM35 sensor, signal processing with Arduino UNO microcontrollers, and information transmission via Bluetooth. Experimental results for both architectures validate the effectiveness of this optoelectronic instrument, demonstrating its capability to integrate RF and WVLC technologies.

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Experimental Demonstration of a Holographic Demultiplexer With Low Polarization-Dependence Loss Using a Long-Period Diffraction Grating

Cited by 2 publications

References 7 publications

An experimental distribution of analog and digital information in a hybrid wireless visible light communication system based on acousto-optic modulation and sinusoidal gratings

An experimental distribution of analog and digital information in a hybrid wireless visible light communication system based on acousto-optic modulation and sinusoidal gratings

Wireless transmission of audio signals and temperature data using an optoelectronic system

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