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The ECE Equipment Kit includes the essential equipment required for ECE 202, 203, 210, 302, 303, 312, and 315, and possibly other third and fourth-year courses, ...

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A.L. and J.R. conducted the various experiments and analysed the data. E.L. assisted with laser linearization, W.W. performed the numerical simulations, A.L. designed the samples and J.L. fabricated the samples. All authors discussed the manuscript. J.R., T.J.K., M.K. and E.L. wrote the manuscript. T.J.K. supervised the work and conceived the experiment.

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a, c, e, The evolution of the root-mean-square frequency deviation during the optimization loop for modulation frequencies of 10 kHz, 1 MHz and 10 MHz, respectively. b, d, f, Corresponding evolution of the deviation between the measurement and the target sweep, at each iteration of the loop.

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My real problem is that these images will not display from a CD with my Blu-ray player, where images from a previous camera will.  The only difference I see is that the ELPH 330 HS images are ~500 KB, but from the previous camera ~ 4000 KB.  I wonder if the ELPH images are too low resolutions for Blu-ray/High Def.

We thank A. S. Raja for his contribution with microresonator testing. Samples were fabricated at the Center of MicroNanoTechnology (CMi) with the assistance of R. N. Wang. This work was supported by funding from the Swiss National Science Foundation under grant agreement number 165933 and by the Air Force Office of Scientific Research (AFOSR), Air Force Material Command, USAF, under award number FA9550-15-1-0250. Sample fabrication and process developement was funded by contract HR0011-15-C-055 (DODOS) from the Defense Advanced Research Projects Agency (DARPA), Microsystems Technology Office (MTO). J.R. and W.W. acknowledge support from the EUs H2020 research and innovation program under the Marie Sklodowska-Curie IF grant agreement numbers 846737 (CoSiLiS) and 753749 (SOLISYNTH), respectively. We acknowledge interactions with A. Zott from ZEISS AG.

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a, Time-frequency maps obtained with short-time Fourier transform of the delayed homodyne beat detection of the individual FMCW channels back-reflected from the rotating flywheel. Top left to bottom right panels denote optical carriers between 192.1 THz and 195.2 THz. The pump channel at 193 THz is outlined in purple. Modulation frequency is 100 kHz. b, As for a, but for static flywheel.

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a, Measurement setup. The linearized frequency-modulated microcomb (see Extended Data Fig. 5 for setup schematic) is amplified and individual channels are selected by connecting the local oscillator path of the measurement setup to a calibrated imbalanced MZI (8.075 m). b, The top panel shows the frequency-excursion bandwidth Bμ determined from independent measurement of the length of imbalanced MZI. Linear fit related to Raman self-frequency shift ΩR. The bottom panel shows the residuals of the linear fit.

a, Setup for pump-laser frequency measurement via delayed homodyne detection and chirp linearization feedback. Calibration of the MZI is performed by fitting the frequency-dependent phase modulation response of the MZI. b, Initial frequency modulation, when the VCO is driven with a triangular ramp, determined using a Hilbert transform. The measured frequency is compared with the targeted ideal modulation. The ramp frequency is 100 kHz. The red-shaded regions around the extremal points are excluded from the linearization update. c, Final triangular frequency modulation pattern, after 20 iterations. Convergence achieved after four iterations. d, Evolution of the root-mean-square frequency deviation during the optimization loop. e, Evolution of the deviation between measurement and target sweep, at each iteration of the loop.

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12megapixel photo

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by MR Hatch · Cited by 3 — F n. NA θ. = = (2) where the numerical aperture (NA) is defined by NA = n' sinθ', where θ' is the real axial ray angle in image space, and n and n' refer to ...

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Is12megapixels 4K

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a, Time–frequency maps obtained with short-time Fourier transform of the heterodyne beat detection of the individual FMCW channels. Top left to bottom right panels denote optical carriers between 192.1 THz and 196 THz. Modulation frequency is 100 kHz. The pump channel at 193 THz is outlined in purple. b, As for a, but for modulation frequency 10 MHz.

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a, Time-dependent frequency of pump laser at 193 THz (grey) and 195 THz comb sideband (μ = 20, dark green) and modulation frequency 100 kHz. b, As for a, but for modulation frequency 10 MHz. c, Power spectral density of frequency modulation Sff for pump (grey) and sideband (dark green). The markers denote the positions of harmonics, which are used in the transduction analysis. The lower panel shows the power spectral density of sideband frequency modulation harmonics normalized to the corresponding modulation power spectral density of the pump laser (see Fig. 3). d, As for c, but for modulation frequency 10 MHz.

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ELPH 330 HS is rated 12 MPixel, but the jpeg images exported with Canon Utilities CameraWindow are only 1600 x 1200 pixels.  I can't find where to set the resolution of the exported images, either on the camera or the software.

a, Setup for pump-laser frequency measurement via heterodyne beat note and chirp linearization feedback. b, Initial frequency modulation, when the VCO is driven with a triangular ramp. The measured frequency is compared with the targeted ideal modulation. The ramp frequency is 100 kHz. c, Final triangular frequency modulation pattern, after four iterations. d, Evolution of the root-mean-square (RMS) frequency deviation during the optimization loop. e, Evolution of the deviation between measurement and target sweep, at each iteration of the loop.

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12megapixel resolution print size

Coherent ranging, also known as frequency-modulated continuous-wave (FMCW) laser-based light detection and ranging (lidar)1 is used for long-range three-dimensional distance and velocimetry in autonomous driving2,3. FMCW lidar maps distance to frequency4,5 using frequency-chirped waveforms and simultaneously measures the Doppler shift of the reflected laser light, similar to sonar or radar6,7 and coherent detection prevents interference from sunlight and other lidar systems. However, coherent ranging has a lower acquisition speed and requires precisely chirped8 and highly coherent5 laser sources, hindering widespread use of the lidar system and impeding parallelization, compared to modern time-of-flight ranging systems that use arrays of individual lasers. Here we demonstrate a massively parallel coherent lidar scheme using an ultra-low-loss photonic chip-based soliton microcomb9. By fast chirping of the pump laser in the soliton existence range10 of a microcomb with amplitudes of up to several gigahertz and a sweep rate of up to ten megahertz, a rapid frequency change occurs in the underlying carrier waveform of the soliton pulse stream, but the pulse-to-pulse repetition rate of the soliton pulse stream is retained. As a result, the chirp from a single narrow-linewidth pump laser is transferred to all spectral comb teeth of the soliton at once, thus enabling parallelism in the FMCW lidar. Using this approach we generate 30 distinct channels, demonstrating both parallel distance and velocity measurements at an equivalent rate of three megapixels per second, with the potential to improve sampling rates beyond 150 megapixels per second and to increase the image refresh rate of the FMCW lidar by up to two orders of magnitude without deterioration of eye safety. This approach, when combined with photonic phase arrays11 based on nanophotonic gratings12, provides a technological basis for compact, massively parallel and ultrahigh-frame-rate coherent lidar systems.

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Acktar black coatings is manufactures the blackest black coatings to enhance emissivity, outgassing and stray light control abilities for any project with ...

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