A mid-IR multiwavelength difference frequency generation (DFG) laser source with fiber laser fundamental lights is demonstrated by using the dispersion property of PPLN to broaden the quasi-phase-matching (QPM) acceptance bandwidth (BW). Our results show that the QPM BW for the pump YDFL is much larger than that for the signal EDFL. Using a multiwavelength YDFL and a single-wavelength EDFL as t...

We develop the concept of quasi-phasematching (QPM) by implementing it in recently proposed Josephson traveling-wave parametric amplifier (JTWPA) with three-wave mixing (3WM). The is based on a ladder transmission line consisting flux-biased radio frequency superconducting quantum interference devices (SQUIDs) whose nonlinearity χ ( 2 )-type. QPM achieved 3WM process, ω p = s + i (where ωp, ωs,...

Los granos de maíz alta calidad proteica (QPM) contienen el doble lisina y triptófano en comparación con los normales. Aunque la mutación opaco-2 (o2) es causa subyacente este cambio beneficioso, otros genes como aspartato quinasa-2 (Ask2) afectan menor grado contenido aminoácidos endospermo. Hasta momento, informes sobre interacción entre ambos loci son escasos no existen ensayos alto rendimie...

Frequency conversion based on three-wave mixing is a critical nonlinear optic application, extending the frequency range of existing lasers and realizing frequency-transduced detectors in wavelength that lacks an effective detector. Phase matching vital for conversion. The advantages quasi-phase (QPM) over birefringent phase are lack walk-off effect, maximum coefficient, entire transparency win...

There is a need for a noninvasive technique to monitor living pluripotent stem cell condition without any labeling. We present an optical imaging technique that is able to capture information about optical path difference through the cell and cell adhesion properties simultaneously using a combination of quantitative phase microscopy (QPM) and interference reflection microscopy (IRM) techniques...

Three-wave nonlinear interactions in chirped quasi-phase-matched (QPM) gratings are shown to exhibit conversion efficiency approaching 100% with increasing input pump and signal intensities, evading backconversion, as long as the idler vanishes at the input and the QPM grating is sufficiently chirped. The signal phase is described in terms of Kerr-like self- and cross-phase modulations, in the ...

Phase sensitivity determines the lowest optical path length value that can be detected from noise floor in quantitative phase microscopy (QPM). The temporal is known to limited by both photon shot and a variety of sources electronic devices environment. To beat limit, we explore various ways reduce different factors off-axis interferometry-based QPM with laser illumination. Using high electron-...

Nonlinear frequency conversion offers an effective way to expand the laser wavelength range based on birefringence phase matching (BPM) or quasi-phase-matching (QPM) techniques in nonlinear crystals. So far, efficient high-harmonic generation is enabled only via multiple cascaded crystals because of the extreme difficulty to simultaneously satisfy BPM or QPM for multiple nonlinear up-conversion...

The opaque-2 (o2) mutation of maize increases lysine content, but the low seed density and soft texture of this type of mutant are undesirable. Lines with modifiers of the soft kernel phenotype (mo2) called "Quality Protein Maize" (QPM) have high lysine and kernel phenotypes similar to normal maize. Prior research indicated that the formation of vitreous endosperm in QPM might involve changes i...

Not unitary transformation based on algebraic contraction is proposed to realize mappings between models Hamiltonians. Such a transformation contracts the algebra of the degrees of freedom underlying the Hamiltonian. The rigorous mapping between the anisotropic XXZ Heisenberg model, the Quantum Phase Model, and the Bose Hubbard Model is identified as the group contractions of the algebra u(2) u...