High frequency electric signal sensor using an optical modulator
نویسندگان
چکیده
This work describes an experimental system for sensing and transmission of electric signals using optical coherence modulation of light. The system consists of a Ti:LiNbO3 optical coherence modulator acting as electric signal sensor. The main characteristics of coherence-modulated transmissions include the need of using broad-band optical sources and integrated optics lithium niobate electro-optic retarders. Coherencemodulated systems have been studied for the last few years as new potential high-speed optical links useful for local area networks, point-to-point, and bidirectional transmissions, at optical wavelengths around 1300 nm and 1550 nm. Key-Words: Electro-optic, optical modulator, coherence modulation, electric signal sensing, optical delays.
منابع مشابه
Performance Analysis of Mach-zehnder Modulator in Radio over Fiber Systems
Radio over Fiber (RoF) is a next generation wireless broadband Internet access technology. In Radio over Fiber system the radio signal is generated at the central station is modulated on to light and transmitted over optical fiber cable to various base stations. The base station has to convert the optical signal to an electrical signal, amplify and transmit it. Modulation of RF signal onto ligh...
متن کاملNumerical Analysis of Mushroom-type Traveling Wave Electroabsorption Modulators Using Full-Vectorial Finite Difference Method
Larger width of P-cladding layer in p-i-n waveguide of traveling wave electroabsorption modulator (TWEAM) results in lower resistance and microwave propagation loss which provides an enhanced high speed electro-optical response. In this paper, a fullvectorial finite-difference-based optical mode solver is presented to analyze mushroom-type TWEAM for the first time. In this analysis, the discont...
متن کاملSensitivity Enhancements to Photonic Electric Field Sensor
This paper describes an electrode-less, all-optical, wideband electric field sensor fabricated in an electro-optic lithium niobate substrate. The sensor component is an integrated optic Mach-Zehnder interferometer. The electric field sensor uses the electro-optic properties of lithium niobate to modulate the phase of the light propagating in each arm of the Mach-Zehnder interferometer. The phas...
متن کاملQuadrature delta sigma modular design with adjustable bandwidth and center frequency
In this paper, a flexible Continuous time (CT) feedforward (FF) quadrature delta sigma modulator (QDSM) with variable bandwidth (BW) is proposed. The modulator BW and center frequency (fc) are variable which can be adjusted with two separate parameters. The modulator signal-to-noise ratio (SNR) will be optimized by these parameters at every center frequency and bandwidth. The modulator BW is ch...
متن کاملDetection of Excited Vibration Signals on the Latticed Fence Structure Using a Distributed Fiber Optic Sensor with Sagnac Interferometer
To detect external vibration signals on the latticed fence structure, distributed fiber optic sensor using Sagnac interferometer was fabricated and tested. Because of easy construction Sagnac interferometer was selected rather than MachZehnder type. The latticed structure fabricated with dimension of 180cm in width and 180cm in height, the optical fiber, 50m in length, distributed and fixed on ...
متن کامل