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Integrated Pound-Drever-Hall laser stabilization system in silicon.

Mohamad Hossein Idjadi1, Firooz Aflatouni2

  • 1Department of Electrical and Systems Engineering, University of Pennsylvania, Philadelphia, PA, 19104, USA.

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|November 2, 2017
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We developed an integrated Pound-Drever-Hall system to stabilize low-cost lasers. This compact, inexpensive light source significantly reduces laser frequency noise and Allan deviation for diverse scientific applications.

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Area of Science:

  • Photonics and Optical Engineering
  • Semiconductor Device Physics

Background:

  • Low noise stable lasers are crucial for spectroscopy, communication, metrology, and fundamental science.
  • The Pound-Drever-Hall (PDH) technique is a standard method for laser stabilization.

Purpose of the Study:

  • To demonstrate an integrated PDH system for stabilizing low-cost lasers.
  • To create a compact and inexpensive laser light source with reduced noise.

Main Methods:

  • Integrated an electronically reconfigurable Mach-Zehnder interferometer as a frequency reference.
  • Utilized a standard 180 nm silicon-on-insulator complementary metal-oxide semiconductor process for photonic and electronic integration.

Main Results:

  • Reduced semiconductor laser frequency noise by over 25 dB.
  • Improved relative Allan deviation by more than 12 times at 200 μs averaging time.
  • Achieved significantly lower power consumption and environmental sensitivity compared to bench-top systems.

Conclusions:

  • The integrated PDH system offers a compact (2.38 mm²) and efficient solution for laser stabilization.
  • This technology has the potential to impact various fields of science and engineering by providing accessible, high-performance light sources.