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Self-Locking Screw01:16

Self-Locking Screw

A square-threaded screw jack is a mechanical device widely used for lifting heavy loads or applying considerable force. One of the key features that can make a screw jack more effective and reliable is its self-locking capability.
A square-threaded screw jack carrying a load is considered self-locking if the screw retains its position even after the moment applied to it is removed.

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Phase-stabilised self-injection-locked microcomb.

Thibault Wildi1, Alexander E Ulanov1, Thibault Voumard1

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Researchers achieved full phase-stabilisation of self-injection-locked microresonator frequency combs (microcombs). This breakthrough enables compact, low-complexity microcombs for precision metrology in diverse applications.

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Area of Science:

  • Photonics
  • Optical Engineering
  • Metrology

Background:

  • Microresonator frequency combs (microcombs) offer compact solutions for precision metrology.
  • Self-injection locking enables simpler, chip-based microcomb fabrication.
  • Phase stabilization is crucial for metrological applications but has been unachieved for self-injection-locked microcombs.

Purpose of the Study:

  • To demonstrate full phase-stabilisation of a self-injection-locked microcomb.
  • To enable low-complexity, chip-based microcombs for coherent precision metrology.

Main Methods:

  • Utilized a silicon nitride photonic chip for microresonator implementation.
  • Employed low-voltage control (<1.57 V) of a pump laser diode and microheater.
  • Achieved independent control of comb offset and repetition rate frequencies with actuators exceeding 100 kHz bandwidth.

Main Results:

  • Successfully demonstrated full phase-stabilisation of a self-injection-locked microcomb.
  • Attributed phase-stabilisation to independent control of comb frequencies via advanced actuators.
  • Enabled phase-locking to external frequency references.

Conclusions:

  • Photonic chip-based, self-injection-locked microcombs are now viable for coherent precision metrology.
  • The demonstrated phase-stabilisation overcomes a critical limitation for microcomb applications.
  • These microcombs represent versatile, low-complexity sources for emerging metrological needs.