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