Temporal and Spatial Coherent Pulse Combining by Multi-path Interferometric Scheme

  • Jin Jang
  • Hee Won Jeong
  • Ki-Nam JooEmail author
Regular Paper


In this investigation, we propose a compact temporal and spatial coherent pulse combining module to be applied to the divided chirped pulse amplification. Our temporal coherent pulse dividing/combining module has effectively long optical time delay line, which leads to a few ns delay time, because of the multi-path interferometric scheme and the single module can act a role of both dividing and combining pulses. For the coherent pulse combining, the locking of optical coherence by single-detector electronic-frequency tagging technique was adopted and the sub-pulses were successfully combined to achieve the single combined pulse. In order to estimate the power stability, the intensity signals were collected for approximately 13 h and Allan deviation was calculated. As the result, the stability of pulse combining was 2.97 × 10−2 (2.97%) at 1 s integration time.


Coherent pulse combining Temporal pulse combining Spatial pulse combing Optical system design 

List of Symbols


Optical path length


Length of optical delay line



This study was supported by research fund from Chosun University, 2018.


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Copyright information

© Korean Society for Precision Engineering 2019

Authors and Affiliations

  1. 1.Department of Photonic EngineeringChosun UniversityGwangjuSouth Korea

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