Researchers from Chalmers University of Technology in Gothenburg, Sweden, and Tallinn University of Technology in Estonia have recently demonstrated a 4,000-kilometer fiber-optic transmission link that uses ultra-low noise phase-sensitive optical amplifiers. This is 5 or 6 times better than the traditional optical amplifier.
At present, the noise accumulation of the optical amplifier and the signal distortion of the nonlinear effects in the transmission fiber will limit the reach and capacity of the optical transmission link. In this new demonstration, the researchers found that the use of phase-sensitive amplifiers can significantly reduce the effects of both effects simultaneously.
Compared to traditional erbium-doped fiber amplifiers and other non-phase-sensitive fiber amplifiers, the use of phase-sensitive amplifiers can reduce noise by 6 decibels while reducing the effects of optical nonlinearities. In addition, the link of the phase-sensitive amplifier can transmit two data-carrying waves, which is twice the bandwidth of the non-phase-sensitive amplifier link.
Peter Andrekson, head of optical communication research at Chalmers University of Technology, said: "Although there are some difficulties in commercial applications, these results demonstrate the great benefits of this phase-sensitive amplifier in optical communication in a very clear way. This amplifier is used in the fields of spectroscopy, quantum informatics, and quantum state generation and processing."
Due to coverage 0.6-22 μ M, the grown ZnSe is used as a high optical quality material to manufacture optical components (windows, mirrors, lenses) for high-power IR lasers.
O low absorption at the red end of the visible spectrum
O non hygroscopic
O very stable in laboratory environment
Zinc selenide (ZnSe) is a popular material in infrared applications. Due to coverage 0.6-22 μ M, the grown ZnSe is used as a high optical quality material to manufacture optical components (windows, mirrors, lenses) for high-power IR lasers.
Zinc Selenide Window
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