A forecasting methodology for technology development trends is proposed based on a two-
level network model consisting of knowledge-transfer among patents and patent subclasses …

Nowadays fiber lasers are the first choice for diverse scientific and industrial applications,
thanks to their excellent beam quality, high efficiency, fiexible and compact structure, and …

High spectral efficiency modulation format based unrepeatered transmission systems using
distributed Raman amplifier (DRA) have attracted much attention recently. To enhance the …

摘要在使用前向抽运喇曼放大器的相干光正交频分复用传输系统中, 由于喇曼抽运的强度噪声和
交叉相位调制之间相互作用产生相对相位噪声, 导致系统性能大幅下降. 为了研究此问题 …

Although the pump relative intensity noise transfer phenomenon in traditional Raman
amplified amplitude-shift keying fiber communication systems has been investigated …

The intensity fluctuation of a Raman pump laser source will not only transfer to the signal's
intensity through stimulated Raman scattering effect, which has been investigated …

In this paper, a symmetric training sequence-based (STSB) carrier frequency offset
estimation (FOE) scheme for coherent free-space optical (CFSO) communication is …

This thesis presents an overview of Raman amplifiers in fibre optic transmission systems.
Detailed analysis of the nonlinear accumulated noise and relative intensity noise (RIN) …

Although Mth power carrier phase estimation (PE) algorithm has been investigated
intensively in coherent optical phase-shift-keying (PSK) system, block length effect impacts …

The distributed Raman amplifier (DRA) has been widely utilized in state-of-the-art coherent
optical communication systems using multi-level modulation formatted signals in order to …