Optical Resolution Enhancement with Phase-Sensitive Preamplification

Lim, Oo-Kaw; Alon, Gideon; Dutton, Zachary; Guha, Saikat; Vasilyev, Michael; Kumar, Prem

doi:10.1364/cleo.2010.ctupp7

Cited by 3 publications

(1 citation statement)

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“…Even for direct detection, a high-gain PSA has an almost perfect 0 dB noise figure, whereas the noise-figure limit of a phase-insensitive amplifier is 3 dB. Thus, it can amplify a weak target return signal while potentially preserving its SNR, and hence provide better LADAR resolution by overcoming detector inefficiency and dark noise [5,7].…”

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confidence: 99%

Fundamental eigenmode of traveling-wave phase-sensitive optical parametric amplifier: experimental generation and verification

Bhagwat

Alon²,

Lim³

et al. 2013

Opt. Lett.

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We investigate experimentally the eigenmodes of a Gaussian-beam-pumped traveling-wave phase-sensitive optical parametric amplifier (PSA). By varying the waist of an input LG(00) signal mode, we show that PSA performance improves with increasing spatial overlap between the input and the theoretically predicted fundamental eigenmode. For optimum waist, we report amplification and deamplification markedly higher than those observed for the traditional case of signal waist=√2× (pump waist). Lastly, we demonstrate the generation and verification of the PSA fundamental eigenmode.

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confidence: 99%