The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Knowing the mode structure of light aids in minimizing loss and decoherence of quantum information. We present and experimentally implement reconstruction of the mode distributions of classical and non-classical light using measured photon number distributions.
We proposed a simple method to measure the third-order intercept point for a photodiode using two-tone and two maximum-biased MZM. The measured IP3 of 16.04dBm agreed with that measured using traditional three-tone setup.
Frequency noise and linewidth properties of different mid-infrared DFB-QCLs using buried-heterostructures and ridge waveguides are compared. The physical origin of frequency noise and the impact of the different lasers parameters are discussed.
The instantaneous frequency of a chirped pulse is directly measured by combining spectral and temporal interferometry, allowing for characterization of the stretcher of a chirped-pulse-amplification system over several nanoseconds with picosecond precision.
The outdoor culturing of green algae is monitored with a dual-channel spectroradiometer. The measured reflectance provides information regarding growth rate and light usage, demonstrating potential to meet the monitoring needs for algal biofuel production.
The quantum cascade laser, operates over an extremely wide wavelength range in the mid-infrared with high output power and low power consumption (<1W). A new generation of devices show enhanced wavelength multiplexing and tuning agility capabilities as well a frequency comb generation over more than 100cm−1.
Using modulator-generated optical frequency combs we measure the distance to scattering technical surfaces. We achieve measurement errors below 10 μm, a dynamic range of over 37 dB and an acquisition time of 8.3 μs.
Precise and agile manipulation of frequency and phase of output signals of single-frequency optical frequency synthesizers based on a novel technique for frequency shifting of frequency combs is investigated by relative measurements between identical synthesizers.
We demonstrate that the carrier-envelope offset frequency of a mid-infrared frequency comb from a nondegenerate and doubly-resonant GaAs-based optical parametric oscillator is locked to that of the 2 μm thulium-fiber pump laser.
We bridge between optomechanics and microfluidics by experimentally demonstrating optically excited vibrations. Our device enables extending optomechanics to non-solid phases of matter in a fluid containing microcapillary.
Tiny perturbation, in different places, probe where was a photon passing through an interferometer. A surprising picture emerges, which is not a continuous trajectory or set of continuous trajectories.
Using background-free quantum frequency conversion, two spectrally separate excitonic transitions from a single semiconductor quantum dot are converted to a single wavelength, and two-photon interference on the frequency-converted signal is demonstrated.
We demonstrate the use of pulse-front tilt in cross-correlation frequency-resolved optical gating (XFROG) to measure complex many-picosecond-long pulses on a single shot.
The responsivity of a monolayer graphene photodetector based on the photo-thermoelectric effect was measured at room temperature for dc, terahertz, and optical frequencies and found to be approximately 81, 188, and 18 V/W respectively.
Ultrashort optical pulses have been generated on chip from a frequency comb generated within a Si3N4 micro-resonator. The pulses are measured using frequency resolved optical gating and found to have a FWHM of 74 fs.
We demonstrate the coupling of THz radiation in thin layers of water by means of attenuated total reflection measurements. Moreover, we excite this mode by end-fire coupling and experimentally show propagation lengths of 2 cm.
We simulate multi-shot measurements of trains of pulses with unstable shapes using SPIDER, SRSI, SHG FROG, PG FROG, and XFROG. Interferometric methods measure only the coherent artifact, while FROG methods better approximate the trains.
We report for the first time generation of 640 GHz and 1.28 THz pulse repetition frequencies with high reproducibility, controllability and a wide operation range using passively mode-locked side-wall sampled-grating distribute Bragg reflector lasers.
We characterize the mass sensing properties of microtoroidal optomechanical oscillator (OMO). We show a record sensitivity slope of 1300 Hz/pg and study the impact of mass distribution, mode selection and noise on mass sensitivity.
We present a method of removing the impact of spurious reflections of hard targets at fixed positions in a continuous wave synthetic low coherence Lidar (OLCR Lidar).
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.