Design Methodologies for Low-Power CMOS Operational Amplifiers in a 0.25¿m Digital CMOS Process

Albason, Alfonso Cesar; Axalan, N.M.L.; Gusad, Maria Theresa A.; Hizon, John Richard E.; Rosales, Marc

doi:10.1109/tencon.2006.343920

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“…This offers an advantage in terms of required digital storage and processing in distributed fiber optic sensing systems in which very often large volumes of data from multiple points are involved. This demodulation scheme is also a promising candidate for use with integrated analogue systems, since operational amplifies are available in CMOS integrated circuits [37,38], whose enabling technology is also compatible with silicon photonics [39], allowing hybrid platforms which combine electrical and photonic circuits for a compact integrated receiver [40]. Hence, the demodulation scheme used in the proposed φ-OTDR sensor is highly suitable for distributed dynamic phase extraction.…”

Section: Stable Pgc Demodulation With a Double-pulse φ-Otdr Schemementioning

confidence: 99%

Dynamic phase extraction in a modulated double-pulse ϕ-OTDR sensor using a stable homodyne demodulation in direct detection

et al. 2018

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We propose and experimentally demonstrate a stable homodyne phase demodulation technique in a ϕ-OTDR using a double-pulse probe and a simple direct detection receiver. The technique uses selective phase modulation of one of a pair of pulses to generate a carrier for dynamic phase changes and involves an enhanced phase demodulation scheme suitable for distributed sensing by being robust against light intensity fluctuations, independent of the modulation depth, and convenient for analogue signal processing. The capability of the technique to quantify distributed dynamic phase change due to a generic external impact is experimentally demonstrated by measuring the phase change induced by a nonlinear actuator generating a 2 kHz perturbation at a distance of 1.5 km on a standard singlemode fiber with an SNR of ~24 dB. The demodulated nonlinear response is shown to have a spectrum consistent with one obtained using an FBG sensor and a commercial reading unit.

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Section: Stable Pgc Demodulation With a Double-pulse φ-Otdr Schemementioning

confidence: 99%

Dynamic phase extraction in a modulated double-pulse ϕ-OTDR sensor using a stable homodyne demodulation in direct detection

et al. 2018

View full text Add to dashboard Cite

show abstract

Design Methodologies for Low-Power CMOS Operational Amplifiers in a 0.25¿m Digital CMOS Process

Cited by 1 publication

References 1 publication

Dynamic phase extraction in a modulated double-pulse ϕ-OTDR sensor using a stable homodyne demodulation in direct detection

Dynamic phase extraction in a modulated double-pulse ϕ-OTDR sensor using a stable homodyne demodulation in direct detection

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