2017年12月25日
Pulse distortion and the square of the degree of coherence in the presence of second- and third-order dispersions
Optics Express
- ,
- ,
- ,
- 巻
- 25
- 号
- 26
- 開始ページ
- 32640
- 終了ページ
- 32649
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1364/OE.25.032640
- 出版者・発行元
- OSA - The Optical Society
A white-light source used in combination with a two-beam interferometer provides the same information about the dispersive nature of optical fibers as a femtosecond pulse from a laser source. The shape of the coherence curve in relation to the square of the degree of coherence, | γ |2, reflects the dispersion-induced pulse shape. We induce a third-order dispersion (TOD) effect on the | γ |2 in a two-beam interferometer composed of nondispersive and dispersive arms. A theoretical treatment predicts an oscillatory structure near the trailing edge of the | γ |2–curve due to TOD. Experiments are performed using low coherence sources, a few-mode fiber and a dispersion-shifted fiber near the zero chromatic-dispersion wavelengths of 1300 and 1550 nm, respectively. As a result, the experimentally obtained | γ |2-response well reflects that obtained theoretically for an unchirped wave with a Gaussian spectrum. Therefore, the | γ |2-response interferometric technique has the potential to simulate an ultra-short pulse transmission in the group velocity approximation.
- リンク情報
- ID情報
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- DOI : 10.1364/OE.25.032640
- ISSN : 1094-4087
- SCOPUS ID : 85038959615