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Related Experiment Video

Updated: Aug 23, 2025

Construction and Characterization of External Cavity Diode Lasers for Atomic Physics
09:10

Construction and Characterization of External Cavity Diode Lasers for Atomic Physics

Published on: April 24, 2014

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Chip-based laser with 1-hertz integrated linewidth.

Joel Guo1, Charles A McLemore2,3, Chao Xiang1

  • 1Department of Electrical and Computer Engineering, University of California, Santa Barbara, Santa Barbara, CA 93106, USA.

Science Advances
|October 28, 2022
PubMed
Summary

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This summary is machine-generated.

We developed a compact laser system achieving hertz linewidths for precise metrology and quantum applications. This breakthrough enables scalable, high-performance lasers beyond traditional bulky designs.

Area of Science:

  • Quantum Optics and Photonics
  • Integrated Photonics
  • Metrology and Timekeeping

Background:

  • Hertz-linewidth lasers are crucial for metrology, timekeeping, and quantum systems.
  • Current bulk-optic lasers offer stability but are costly and limited in application.
  • Planar waveguide lasers lack the stability due to noise and thermal sensitivity.

Purpose of the Study:

  • To demonstrate a compact laser system with hertz linewidths and high frequency stability.
  • To overcome the limitations of existing laser technologies for advanced applications.

Main Methods:

  • Integration of lasers with a microfabricated 8-ml vacuum-gap cavity.
  • Utilizing lithographically defined components on planar substrates for scalability.
  • Achieving low-noise performance through advanced microfabrication techniques.

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Related Experiment Videos

Last Updated: Aug 23, 2025

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Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator
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Main Results:

  • Demonstrated a laser system with a 1-second linewidth of 1.1 Hz.
  • Achieved fractional frequency instability below 10-14 at 1 second.
  • Components are fabricated on planar substrates, enabling high-volume manufacturing.

Conclusions:

  • This work presents a significant advancement in compact, stable laser technology.
  • The demonstrated laser system holds potential for portable optical clocks and advanced communication systems.
  • The microfabrication approach paves the way for scalable, cost-effective hertz-linewidth lasers.