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Related Concept Videos

Imaging Biological Samples with Optical Microscopy01:18

Imaging Biological Samples with Optical Microscopy

Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
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Related Experiment Video

Updated: Jun 24, 2026

High-speed Particle Image Velocimetry Near Surfaces
11:59

High-speed Particle Image Velocimetry Near Surfaces

Published on: June 24, 2013

Silicon-chip-based ultrafast optical oscilloscope.

Mark A Foster1, Reza Salem, David F Geraghty

  • 1School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, USA.

Nature
|November 7, 2008
PubMed
Summary
This summary is machine-generated.

Researchers developed a new silicon photonics technique for ultrafast optical waveform measurement. This method achieves 220-fs resolution, enabling advanced optical signal processing and metrology applications.

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Area of Science:

  • Photonics and Optical Engineering
  • Materials Science
  • Ultrafast Science

Background:

  • Advancements in telecommunications and scientific research demand optical waveform measurement with subpicosecond resolution.
  • Current oscilloscope technology offers limited single-shot resolution (30 ps) due to microelectronic bandwidth constraints.
  • All-optical techniques utilizing photonics offer a path to overcome these limitations, driving interest in silicon photonics integration.

Purpose of the Study:

  • To demonstrate a novel optical waveform measurement technology on a silicon-photonic platform.
  • To overcome the resolution limitations of existing electronic oscilloscopes for single-shot measurements.
  • To enable advancements in silicon photonics for optical signal processing and ultrafast metrology.

Main Methods:

  • Utilized time-to-frequency conversion through nonlinear four-wave mixing on a silicon chip.
  • Implemented the technique within a silicon-on-insulator (SOI) platform, compatible with complementary metal-oxide-semiconductor (CMOS) technology.
  • Employed single-mode optical fiber for signal transmission.

Main Results:

  • Achieved optical waveform measurement with 220-fs resolution.
  • Demonstrated measurement over waveform lengths exceeding 100 ps.
  • Established a record-setting record-length-to-resolution ratio (>450) for single-shot picosecond waveform measurement techniques.

Conclusions:

  • The developed silicon-photonic waveform measurement technology offers unprecedented resolution and record length.
  • The use of mature CMOS-compatible SOI technology and optical fiber facilitates integration and scalability.
  • This technology holds significant promise for next-generation communications, optical performance monitoring, and chip-scale metrology instruments.