Chirped-cavity dispersion-compensation filter design |
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Authors: | Li Ya-Ping Chen Sheng-Hui Lee Cheng-Chung |
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Affiliation: | Thin Film Technology Center and Institute of Optical Sciences, National Central University, Chung-Li City 32001, Taiwan, China. |
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Abstract: | A new basic structure of a dispersive-compensation filter, called a chirped-cavity dispersion-compensator (CCDC) filter, was designed to offer the advantages of small ripples in both reflectance and group-delay dispersion (GDD). This filter provides a high dispersion compensation, like the Gires-Tournois interferometer (GTI) filter, and a wide working bandwidth, like the chirped mirror (CM). The structure of the CCDC is a cavity-type Fabry-Perot filter with a spacer layer (2 mH or 2 mL) and a chirped high reflector. The CCDC filter can provide a negative GDD of -50 fs2 over a bandwidth of 56 THz with half the optical thickness of the CM or the GTI. |
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