Thermally tuned optical fiber for true time delay generation |
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Authors: | Brie Howley Zhong Shi Yongqiang Jiang Ray T Chen |
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Institution: | Microelectronics Research Center, The University of Texas at Austin, Austin, TX 78758, USA |
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Abstract: | A new technique for generating a continuous range of true time delay values is introduced. Heating optical fiber in order to change the effective index of the guided mode produces time delays. A 45-m section of single-mode silica fiber is demonstrated to produce a continuous range of time delay values from 0 to 211 ps over a temperature tuning range of 50°C (30–80°C). A thermal time delay factor is introduced and found to be 0.096 ps/m°C for Corning LEAF fiber. A 7.66-m section of multimode Lucina polymer fiber is demonstrated to produce a range of time delay values from 0 to 32 ps over a temperature tuning range of 30°C (30–60°C). The thermal time delay factor for this fiber is −0.1427 ps/m°C. |
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Keywords: | Optical fiber Phased array antenna True time delay |
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