Ultrafast pulse characterization using cross phase modulation in silicon

Tien, En-Kuang; Sang, Xing-Zhu; Qing, Feng; Song, Qi; Boyraz, Özdal

doi:10.1063/1.3193538

Cited by 31 publications

(16 citation statements)

References 15 publications

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“…This demonstration opens the door to realizing fully integrated devices capable of measuring ultra-fast near-infrared pulses on a silicon chip. 10…”

Section: Resultsmentioning

confidence: 99%

“…However, an integrated chip-based pulse measurement device that is capable of singleshot measurements, without the need for a reference pulse, averaging or some external instrumentation that is difficult to integrate, such as an optical spectrum analyser or a long tunable delay line, is still lacking. While several groups have replicated all-optical techniques on a chip [9][10][11][12] that are well established in free-space or fiber-optics, such as autocorrelation, frequency-resolved optical gating (FROG), or temporal sampling, with obvious benefits in footprint, energy consumption and performance, all of the demonstrations fall short in one of the aforementioned points. A fully integrated pulse-measurement technology is nonetheless highly attractive, enabling the complete integration of pulse-generation, optical processing and measurement schemes on a single chip.…”

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confidence: 99%

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Integrated optical auto-correlator based on third-harmonic generation in a silicon photonic crystal waveguide

et al. 2014

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The ability to use coherent light for material science and applications is linked to our ability to measure short optical pulses. While free-space optical methods are well established, achieving this on a chip would offer the greatest benefit in footprint, performance and cost, and allow the integration with complementary signal-processing devices. A key goal is to achieve operation at sub-watt peak power levels and on sub-picosecond timescales. Previous integrated demonstrations require either a temporally synchronized reference pulse, an off-chip spectrometer or long tunable delay lines. Here we report a device capable of achieving single-shot time-domain measurements of near-infrared picosecond pulses based on an ultra-compact integrated CMOS-compatible device, which could operate without any external instrumentation. It relies on optical third-harmonic generation in a slow-light silicon waveguide. Our method can also serve as an in situ diagnostic tool to map, at visible wavelengths, the propagation dynamics of near-infrared pulses in photonic crystals.

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“…This demonstration opens the door to realizing fully integrated devices capable of measuring ultra-fast near-infrared pulses on a silicon chip. 10…”

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

Integrated optical auto-correlator based on third-harmonic generation in a silicon photonic crystal waveguide

et al. 2014

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“…In contrast, the finite-difference time-domain method (FDTD) potentially offers higher resolution and accuracy of reconstructed images due to the fact that it carries all the information about the phase and coherence of the wavefront [16]. Furthermore, new ultrafast technologies have been developed for the measurement of ultrafast optical pulses in both amplitude and phase such as Frequency Resolved Optical Gating (FROG) [17][18], time lens based on nonlinear parametric conversion [19], and Spectral Phase Interferometry for Direct Field Reconstruction (SPIDER) [20][21]. With advent of these new ultrafast measurement technologies, the imaging reconstruction algorithms are also necessary to step forward to achieve optical images with higher spatial resolutions and higher image contrasts.…”

Section: Introductionmentioning

confidence: 99%

Reverse-Time Migration Based Optical Imaging

Wang¹,

Ding²,

Lu³

et al. 2016

IEEE Trans. Med. Imaging

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We theoretically demonstrated a new optical imaging technique based on reverse-time migration (RTM) for reconstructing optical structures in homogeneous media for the first time. RTM is a powerful wave-equation-based method to reconstruct the image of the structure by modeling the wave propagation inside the media with both forward modeling and reverse-time extrapolation. While RTM is commonly used with acoustic seismic waves, this paper represents the first effort to develop optical RTM imaging method for biomedical research. To refine the image quality, we further developed new methods to suppress the low-wavenumber artifact (LWA). When compared with the conventional means for LWA suppression such as Laplacian filtering, illumination normalization, and the ratio method, our new derivative-based and power-image methods are able to significantly reduce LWA, resulting in high-quality reconstructed images with sufficient contrasts and spatial resolutions for structure identification. The optical RTM imaging technique may provide a new platform for non-invasive optical imaging of structures in deep layers of tissues for biomedical applications.

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“…These developments are creating a growing and compelling need for ultrafast coherent optical pulse measurement techniques that can operate at milliwatt peak power levels and on timescales ranging from sub-picoseconds to nanoseconds. Previous reports of ultrafast optical signal measurements in integrated, CMOS compatible platforms include time-lens temporal imaging and waveguide-based frequency-resolved optical gating (FROG) [1,[7][8][9][10]. These approaches indeed transferred in the integrated domain two popular methods [1,11,12] for ultrafast pulse measurement; however, time-lens imaging is phase-insensitive while waveguide-based FROG methods require long integrated tunable delay lines -still an unsolved challenge for the full integration of the technique.…”

Section: Introductionmentioning

confidence: 99%