Journal of the Korean Solar Energy Society (한국태양에너지학회 논문집)

The Korean Solar Energy Society (한국태양에너지학회)
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Transient and synchronization behaviors of a standing-wave TA (Thermoacoustic) laser pair

  • Hyun, Jun Ho (Nuclear & Energy Engineering Department, Jeju National University) ;
  • Oh, Seung Jin (Nuclear & Energy Engineering Department, Jeju National University) ;
  • Shin, Sang Woong (Nuclear & Energy Engineering Department, Jeju National University) ;
  • Chen, Kuan (Department of Mechanical Engineering, University of Utah) ;
  • Chun, Wongee (Nuclear & Energy Engineering Department, Jeju National University)
  • Received : 2013.10.31
  • Accepted : 2014.01.14
  • Published : 2014.02.28
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Abstract

The transient and synchronization behaviors of a TA (thermo acoustic) laser pair were investigated experimentally for various crossing angles and different separation distances between the laser openings. Sound waves generated by the lasers were measured and analyzed at or near the focusing point by means of microphones, SPL meters, and a commercial software called Signal-Express. The two TA lasers were acoustically coupled through the air mass between their openings, and the only mode-locking operation that could be achieved was the one that was nearly $180^{\circ}C$ out of phase. The time to achieve synchronization was found to be dependent upon the initial mistuning of the frequencies and the crossing angle between the laser axes. The synchronization process could also be accelerated by turning on the laser with the lower power input first.

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References

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