![]() Paiella, R., Martini, R., Capasso, F., Gmachl, Wang, H.Y., Sivco, D.L., Baillargeon, J.N., Cho, A.Y, Whittaker, E.A., and Liu, H.C, High-frequency modulation without the relaxation oscillation resonance in quantum cascade lasers, Appi. Y., and Liu, H.C, Self-mode-locking in quantum cascade lasers with giant ultrafast optical nonlinearities, Science, 290, 1739–1742 (2000). Paiella, R., Capasso, F., Gmachl, C, Sivco, D.L., Baillargeon, J.N., Hutchinson, A.L., Cho, A. Paiella, R., Capasso, F., Gmachl, C, Bethea, C.G., Sivco, D.L., Baillargeon, J.N., Hutchinson, A.L., Cho, A.Y., and Liu, H.C, Generation and Detection of High-Speed Pulses of Mid-Infrared Radiation with Intersubband Semiconductor Lasers and Detectors, IEEE Photon. Electron., 38(6), 511–532 (2002).įaist, J., Capasso, F., Sirtori, C, Sivco, D.L., and Cho, A.Y., Quantum Cascade Lasers, Chapter VIII, in Intersubband Transition in Quantum Wells: Physics and Device Application II, edited by Liu, H.C. 36–42.Ĭapasso, R, Gmachl, C, Paiella, R., Tredicucci, A., Hutchinson, A.L., Sivco, D.L., Bail-largeon, J.N., Cho, A.Y., and Liu, H.C., New Frontiers in Quantum Cascade Lasers and Applications, IEEE J. Killinger, D., Free Space Optics for Laser Communication Through the Air, Optics and Photonics News, October 2002, pp. This process is experimental and the keywords may be updated as the learning algorithm improves. These keywords were added by machine and not by the authors. We then implement a practical free space communications link that under conditions of atmospheric fog, dust and other obscurants offers significant transparency advantage when compared with near infrared wavelength sources presently used in commercial free space optical communications links. In these experiments we first establish that the QCL has very high modulation bandwidth. In an effort to establish the efficacy of using directly modulated QCLs for free space communications we have conducted a series of investigations that demonstrate the potential advantages of this technology. ![]() The advent of the quantum cascade laser (QCL) with emission wavelengths available in the infrared range from 3 µm through more than 100 µm opens up the possibility of exploiting infrared atmospheric transparency windows for free space optical communications. ![]()
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