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Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Coherent beam combination with single frequency dithering technique.

Yanxing Ma1, Pu Zhou, Xiaolin Wang

  • 1College of Opticelectric Science and Engineering, National University of Defense Technology, Changsha 410073, China.

Optics Letters
|May 4, 2010
PubMed
Summary
This summary is machine-generated.

A novel single frequency dithering technique enables coherent beam combination of multiple fiber amplifiers. This method significantly improves fringe contrast and reduces phase error, offering a cost-effective solution for scaling laser systems.

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Area of Science:

  • Optics and Photonics
  • Laser Physics
  • Fiber Optics

Background:

  • Coherent beam combination (CBC) is crucial for scaling laser power.
  • Traditional CBC methods often require complex phase control systems and reference beams.
  • Existing techniques face challenges in scalability and cost-effectiveness.

Purpose of the Study:

  • To introduce and demonstrate a new single frequency dithering technique for CBC.
  • To showcase the effectiveness of this technique in combining beams from multiple fiber amplifiers.
  • To evaluate the performance improvements in terms of fringe contrast and phase error.

Main Methods:

  • Development of a single frequency dithering technique for phase control.
  • Experimental demonstration of coherent beam combination of four fiber amplifiers.
  • Implementation of a closed-loop phase control system utilizing the dithering technique.

Main Results:

  • Successful coherent beam combination of four fiber amplifiers was achieved.
  • Fringe contrast improved by over 85% (from 8% to >93%) in closed-loop operation.
  • Residual phase error was reduced to less than lambda/20.

Conclusions:

  • The single frequency dithering technique is a novel and effective method for CBC.
  • This technique offers a simple, low-cost solution for scaling to a large number of beamlets.
  • The demonstrated performance highlights its potential for advanced laser systems.