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A novel all-electronic scheme for real-time measurement and stabilization of the carrier-envelope phase of kHz pulse trains is demonstrated, revealing new insight into the pulse-to-pulse phase fluctuations of such lasers.
We demonstrate an interferometric configuration comprising a saturable Bragg reflector for phase-to-amplitude response conversion. Its static nonlinear phase response is determined and used to obtain tunable nonlinear amplitude depth modulation.
The complete characterization of the 19th harmonic of Ti:sapphire laser was demonstrated using the photoelectron spectral shearing interferometry for the first time. The frequency chirp of a harmonic pulse was sensitively detected by this method.
We demonstrate interferometric spectroscopy of high-order harmonic fields with a resolution of the XUV optical period. In addition, we obtain an interferometric fringe of an attosecond pulse train by reconstruction from these harmonic fields.
The influence of accumulation effects on the creation of ldquonanogratingrdquo structures has been investigated. Furthermore, the plasma electron density has been measured with a spectral interferometry pump-probe technique.
We obtain the complex refractive index of ultra-thin gold film (down to 20 picometers) on thermal oxide on silicon by the combination of in-line (IL) and differential-phase-contrast (DPC) channels of spinning-disc interferometry (SDI).
We present theory and experiment quantifying the limitations to stable transport of optical frequencies over optical fiber. These are fundamental fiber noise, propagation delay, bidirectional propagation and system noise in the measurement interferometers.
We demonstrate a three-fold phase accuracy improvement in optical pulse reconstruction based on Hilbert transform temporal interferometry using a feedback-control for minimizing the phase errors associated with instabilities in the fiber-based interferometer.
A method for time resolved optical probing of laser ion acceleration using interferometry is presented. The electron density in the accelerating fields were reconstructed in a time series with 100 fs resolution.
An interferometric multiplex coherent anti-Stokes scattering (iMCARS) system that utilizes the supercontinuum of a photonic crystal fiber as both the Stokes and local oscillator sources for broadband heterodyne detection is demonstrated.
The phase relation among phase-locked multicolor pulses was measured by interference between dual simultaneous frequency-mixing processes in a thin nonlinear crystal for characterization of Fourier-synthesized waveform.
Molecular interferometric imaging (MI2) approaches the single-molecule limit for label-free direct optical detection. It is simpler, cheaper and more sensitive than surface plasmon resonance for dynamic studies of molecular interactions.
We demonstrate ultrahigh-speed optical coherence tomography (OCT) imaging (at 5,000,000 A-lines/s) of biological samples using a recently introduced stretched-pulse interference technique with significantly improved performances in terms of sensitivity (-82dB) and resolution (42-mum).
Technique of transferring length-information between two distantly-located low-coherence-interferometers through a single-mode-optical-fiber for remote and in-situ calibration of linear scale is developed. Results of 200 nm-deviation and 100 nm-standard deviation for 50 mm-length is preliminary achieved.
High-speed 3-dimensional measurement system is demonstrated using electronically controlled wavelength-tunable ultrashort pulse fiber laser and fiber interferometer. Clear images of metallic samples are obtained from a few meter long distance at speed of 1,000 points/s.
Interferometer for precise refractive-index measurement of glass-prism without prior knowledge is developed using a direct comparison of optical-path-changes in glass and air. Preliminary result shows uncertainty of 4.4 x 10-5 agreeing with the manufacturerpsilas values.
We propose analytic retrieval of complete spectral phase profile by measuring two modified interferometric field autocorrelation traces using thick nonlinear crystals with slightly different central phase-matching wavelengths.
We investigate conditions for optically coherent injection locking of a monolithic mode-locked semiconductor laser. An interferometric technique is used to quantify the relationship between modal detuning, pulse shape, and optical spectrum.
We propose ultra-small silicon microring-based pulse carvers operated at 10 Gb/s. RZ-DPSK transmitter is obtained in chip-size of only tens of mum2 and exhibits lower power-penalty than MZM-based one by 1.7 dB in data transmission.
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