Multifunctional fiber-optic microwave links based on remote heterodyne detection
| Autor: | U. Gliese, K.E. Stubkjaer, S. Norskov, T.N. Nielsen |
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| Rok vydání: | 1998 |
| Předmět: | |
| Zdroj: | Gliese, U B, Nielsen, T N, Nielsen, S N & Stubkjær, K 1998, ' Multifunctional fiber-optic microwave links based on remote heterodyne detection ', I E E E Transactions on Microwave Theory and Techniques, vol. 46, no. 5, pp. 458-468 . https://doi.org/10.1109/22.668642 |
| ISSN: | 0018-9480 |
| DOI: | 10.1109/22.668642 |
| Popis: | The multifunctionality of microwave links based on remote heterodyne detection (RHD) of signals from a dual-frequency laser transmitter is discussed and experimentally demonstrated in this paper. Typically, direct detection (DD) in conjunction with optical intensity modulation is used to implement fiber-optic microwave links. The resulting links are inherently transparent. As opposed to DD links, RHD links can perform radio-system functionalities such as modulation and frequency conversion in addition to transparency. All of these three functionalities are presented and experimentally demonstrated with an RHD link based on a dual-frequency laser transmitter with two offset phase-locked semiconductor lasers. In the modulating link, a 1-Gb/s baseband signal is QPSK modulated onto a 9-GHz RF carrier. The frequency converting link demonstrates up-conversion of a 100-Mb/s PSK signal from a 2-GHz carrier to a 9-GHz carrier with penalty-free transmission over 25 km of optical fiber. Finally, the transparent link transmits a standard FM video 7.6-GHz radio-link signal over 25 km of optical fiber without measurable distortion. |
| Databáze: | OpenAIRE |
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