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Tunable Optical Frequency Comb Generated Using Periodic Windows in a Laser and Its Application for Distance

Zhuqiu Chen1, Can Fang1, Yuxi Ruan1

  • 1School of Electrical, Computer and Telecommunications Engineering, Faculty of Engineering and Information Sciences, University of Wollongong, Northfields Ave, Wollongong, NSW 2522, Australia.

Sensors (Basel, Switzerland)
|November 14, 2023
PubMed
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This summary is machine-generated.

A new method generates optical frequency combs (OFCs) using a laser diode in a nonlinear state. This technique allows flexible control over the comb

Area of Science:

  • Physics
  • Optics
  • Nonlinear Dynamics

Background:

  • Optical frequency combs (OFCs) are crucial for precise frequency measurements and advanced optical applications.
  • Traditional OFC generation methods often involve complex and expensive setups, limiting their accessibility.
  • Developing simpler and more adaptable OFC generation techniques is an ongoing research objective.

Purpose of the Study:

  • To present a novel and simplified method for generating optical frequency combs (OFCs).
  • To demonstrate the flexible control over the repetition rate of the generated OFC.
  • To showcase a practical application of the novel OFC generation technique in distance measurement.

Main Methods:

  • Utilizing a laser diode operating in a specific nonlinear dynamic state, termed the 'periodic window', with optical feedback.
Keywords:
distance measurementlaser diodelaser dynamicsoptical feedbackoptical frequency comb

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  • Analyzing the laser spectrum to confirm the presence of discrete, equally spaced frequency components characteristic of an OFC.
  • Adjusting system parameters, such as external cavity length, to tune the repetition rate of the OFC.
  • Implementing a dual-OFC system for distance measurement to validate the practical utility of the generated combs.

    • Main Results:

    • Successfully generated an optical frequency comb (OFC) using the proposed laser diode feedback method.
    • Demonstrated flexible adjustment of the OFC repetition rate by modifying external cavity length.
    • Validated the dual-OFC system's capability for accurate target distance detection.
    • Confirmed the potential for real-world applications in metrology and sensing.

    Conclusions:

    • The proposed method offers a novel and accessible approach for generating tunable optical frequency combs.
    • The flexible repetition rate control makes this technique suitable for various applications.
    • The successful demonstration in distance measurement highlights the practical viability and potential of this OFC generation technique.