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  3. A Random Optical Parametric Oscillator.
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  3. A Random Optical Parametric Oscillator.

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A random optical parametric oscillator.

Pedro Tovar1, Jean Pierre von der Weid2, Yuan Wang3

  • 1Nexus for Quantum Technologies, University of Ottawa, 25 Templeton Street, Ottawa, ON, K1N 6N5, Canada. ptovarbr@uottawa.ca.

Nature Communications
|October 20, 2023

View abstract on PubMed

Summary
This summary is machine-generated.

Researchers developed the first random optical parametric oscillator (OPO) using fiber optics, overcoming limitations of traditional OPOs. This robust, flexible device offers tuneable wavelengths and adjustable pulse characteristics for applications like LiDAR.

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Area of Science:

  • Nonlinear optics
  • Fiber optics
  • Laser physics

Background:

  • Synchronously pumped optical parametric oscillators (OPOs) offer tuneable ultra-fast light pulses but require precise cavity control, limiting flexibility.
  • Existing OPOs face challenges with fixed repetition rates and limited pulse width adjustability.

Purpose of the Study:

  • To develop a simpler, more versatile optical parametric oscillator (OPO).
  • To explore the use of inherent refractive index disorder in single-mode fibers for OPO realization.

Main Methods:

  • Introduced the concept of a random optical parametric oscillator (OPO), analogous to random lasers.
  • Utilized modulation instability (χ(3) non-linearity) for parametric amplification.
  • Employed Rayleigh scattering within single-mode fibers for optical feedback.

Main Results:

  • Demonstrated the first random OPO operating without precise temperature or length control.
  • Achieved high inter-pulse coherence (coherence time of ~0.4 ms).
  • Exhibited adjustable repetition rates (16.6–2000 kHz) and pulse widths (0.69–47.9 ns).

Conclusions:

  • The novel random OPO offers a robust and flexible alternative to traditional OPOs.
  • The device's continuous operation and tuneable parameters are suitable for LiDAR applications.
  • This work paves the way for future random OPOs utilizing diverse parametric amplification mechanisms.