Performance of a photonic oversampled sigma-delta quantiser

Clare, Bradley A.; Corbett, Kerry A.; Grant, Kevin

doi:10.1117/12.604263

Cited by 1 publication

(1 citation statement)

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“…The system uses free‐space optics and self‐electro‐optic effect devices to perform the subtraction and quantization operations. A detailed performance analysis of this converter was developed by Clare et al [6] resulting with a peak signal‐to‐quantum‐noise ratio of 54 dB and oversampling ratio of 100. A different approach based on a coherent system was proposed by Pace et al [7] where both the feedback and the quantization are performed in the electrical domain, whereas the subtraction is carried out in the optical domain via a Mach–Zehnder modulator.…”

Section: Introductionmentioning

confidence: 99%

Photonic asynchronous delta‐sigma modulator system for analog‐to‐digital conversion

Siahmakoun

Constanzo-Caso

Reeves

2012

Micro & Optical Tech Letters

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A novel photonic asynchronous delta‐sigma modulator (ADSM) has been investigated and demonstrated for the first time in this article. An inverted bistable quantizer is required due to use of a positive feedback in this noninterferometric optical implementation. The principles of the proposed optical first‐order and second‐order ADSM are modeled and analyzed. Two main components of the novel optical ADSM; the leaky integrator and the inverted bistable quantizer have been mathematically analyzed, simulated, and characterized. Finally, a prototype fiber‐optic ADSM is constructed. The prototype operates at MHz frequencies producing four effective‐number‐of‐bits resolution. The reported fiber‐optic ADSM is a very promising for future integration of this system on a photonic chip thus increasing the operation frequency range up to tens of GHz. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:1287–1292, 2012

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Section: Introductionmentioning

confidence: 99%