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Here we report an active microresonator by integrating a thin layer of all-inorganic CsPbBr3 nanocrystals (NCs) to a silica microsphere. We also demonstrate the transition from spontaneous emission to stimulated emission (SE) of CsPbBr3 with varying pump power. Further lasing is expected by improving the fabrication technology. Our configuration may provide a route to low threshold and compact lasers,...
This paper reports a 400-km ultra-long haul unrepealed transmission system in a 8×10 Gbit/s optical transmission network (OTN) by using forward Raman amplifier and backward second order remotely optical pumped amplifier(ROPA). A second order ROPA is obtained by adding an auxiliary second order pump to the first order ROPA. Through experiment, we compare the performance of 1st ROPA and 2nd ROPA in...
The amplification characteristics of DPSK signal in semiconductor optical amplifier (SOA) is numerically simulated and experimentally demonstrated for the first time. The results show that the bit pattern effect (BPE) of the DPSK signal is induced by SOA. According to the results, when pulsewidth of the signal is comparable to the gain recovery time of SOA, the BPE is severe. And when the pulsewidth...
The amplification characteristics of DPSK signal in semiconductor optical amplifier (SOA) is numerically simulated and experimentally demonstrated for the first time. The results show that the bit pattern effect (BPE) of the DPSK signal is induced by SOA. According to the results, when pulsewidth of the signal is comparable to the gain recovery time of SOA, the BPE is severe. And when the pulsewidth...
In this paper, we develop two joint routing and resource allocation algorithms for stealth and ordinary services in optical networks. The transmission of stealth service needs to be hidden in ordinary services to achieve a better performance in privacy. Two heuristic algorithms construct paths for stealth and ordinary services base on the different routing methods. The proposed algorithms improve...
We experimentally demonstrate, for the first time, a second-order few-mode distributed Raman amplifier with 4 dB mode-equalized gain. The noise figure improvement of the LPoi andLPn modes are respectively 1.2 dB and 1.1 dB compared with first-order Raman amplification scheme. We also use optical time-domain reflectometer (OTDR) to measure the signal evolutions, and the results confirm the low noise...
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