Based on the space diversity reception,the binary phase-shift keying(BPSK) modulated free space optical(FSO) system over Málaga(M) fading channels is investigated in detail.Under independently and identically dis...Based on the space diversity reception,the binary phase-shift keying(BPSK) modulated free space optical(FSO) system over Málaga(M) fading channels is investigated in detail.Under independently and identically distributed and independently and non-identically distributed dual branches,the analytical average bit error rate(ABER) expressions in terms of H-Fox function for maximal ratio combining(MRC) and equal gain combining(EGC) diversity techniques are derived,respectively,by transforming the modified Bessel function of the second kind into the integral form of Meijer Gfunction.Monte Carlo(MC) simulation is also provided to verify the accuracy of the presented models.展开更多
The output characteristics of neodymium-doped gadolinium vanadate(Nd:GdVO4) crystals laser with dual c-axis orthogonal gains end-pumped by two fiber-coupled diode lasers are investigated. With two 1 W semiconductor di...The output characteristics of neodymium-doped gadolinium vanadate(Nd:GdVO4) crystals laser with dual c-axis orthogonal gains end-pumped by two fiber-coupled diode lasers are investigated. With two 1 W semiconductor diode lasers pumping, the output power of TEM00 laser is 920 m W, and the optical conversion efficiency is close to 46%. By changing the relative orientations of both Nd:Gd VO4 crystals, the polarization characteristics of laser are varied. In particular, by keeping the c-axes of two Nd:Gd VO4 crystals orthogonal to each other and adjusting two diode pump lasers to operate at the same power level, the completely unpolarized light is obtained.展开更多
基金supported by the National Natural Science Foundation of China(No.61474090)the Nature Science Basic Research Plan in Shaanxi Province of China(No.2014JM8340)the China Postdoctoral Science Special Foundation(No.201104659)
文摘Based on the space diversity reception,the binary phase-shift keying(BPSK) modulated free space optical(FSO) system over Málaga(M) fading channels is investigated in detail.Under independently and identically distributed and independently and non-identically distributed dual branches,the analytical average bit error rate(ABER) expressions in terms of H-Fox function for maximal ratio combining(MRC) and equal gain combining(EGC) diversity techniques are derived,respectively,by transforming the modified Bessel function of the second kind into the integral form of Meijer Gfunction.Monte Carlo(MC) simulation is also provided to verify the accuracy of the presented models.
基金supported by the National Natural Science Foundation of China(No.11104234)
文摘The output characteristics of neodymium-doped gadolinium vanadate(Nd:GdVO4) crystals laser with dual c-axis orthogonal gains end-pumped by two fiber-coupled diode lasers are investigated. With two 1 W semiconductor diode lasers pumping, the output power of TEM00 laser is 920 m W, and the optical conversion efficiency is close to 46%. By changing the relative orientations of both Nd:Gd VO4 crystals, the polarization characteristics of laser are varied. In particular, by keeping the c-axes of two Nd:Gd VO4 crystals orthogonal to each other and adjusting two diode pump lasers to operate at the same power level, the completely unpolarized light is obtained.
