【摘 要】
：
Using only one diffractive element, the Talbot interferometer provides a robust and inherently stable method for reproducing fiber Bragg gratings with variable
【机 构】
：
The Key Laboratory of Optoelectronics Information Science & Technology
【基金项目】
：
国家自然科学基金;国家高技术研究发展计划(863计划);Lab of Opto-Electronics Engineering, Educational Ministry of China
论文部分内容阅读
Using only one diffractive element, the Talbot interferometer provides a robust and inherently stable method for reproducing fiber Bragg gratings with variable wavelengths, and reduces the complexity of the fiber grating fabrication system. However, the usable length of the grating is limited by the practical length of the mirrors. This paper presents a phase mask with two fixed prisms and two rotational prisms to inscribe fiber Bragg gratings with variable Bragg wavelengths. In this system, the fiber Bragg grating is inscribed by UV interference stripes of 193 nm derived from two rotational prisms and two fixed prisms, where phase mask is used as a beam splitter of ±1 order diffraction light. It is noteworthy that the tunable phase mask interferometer decreases the demand of the length of prism evidently.
其他文献
作文修改实践模式是依据高中生作文基础和素质教育的基本要求，充分尊重和调动学生写作积极性、主动性、主体性和创新性的一种作文训练方法，是在充分研究学生的作文基本情况下，遵
The ternary interaction of 1, 5-bis(2-hydroxy-5-chlorphenyl)-3-cyanoformazan (HCPCF) with cetyltrimethylammonium bromide (CTAB) and rare earths (RE: Yb, Dy, Er
The preparation of nano sized La2O3 powder by mechanochemical reaction of lanthanum carbonate with sodium hydroxide and subsequent heat treatment was studied us
The complex Tb(SSA)*H2O (1) and Tb2.5La (SSA)3.5*7H2O (2), TbY(SSA)2*2H2O (3), Tb1.5Gd(SSA)2.5*4H2O (4), TbGd1.5(SSA)2.5*3H2O (5), TbGd2.5(SSA)3.5*4H2O (6), TbG
Some results of amorphous alloy nanocrystallization by shock wave are presented. Compared with the well knownannealing crystallization, these results seem novel
Two one-dimensional heterometallic coordination polymers {[CuEr(Gly)5(H2O)2](ClO4)5*H2O}n (1) and {[Cu2Gd2(Gly)10(H2O)4](ClO4)10*4H2O}n (2) (Gly = glycine) were
Six new rare earth complexes with Schiff base from 2,6-diformylpyridine N-oxide and 4-amino-antipyrine were synthesized. These complexes with general formula RE
Based on the treatment that a rectangular function can be expanded into an approximate sum of complex Gaussian functions with finite numbers, the analytical exp
The rare earth nitrate complexes with 2,2′:4′,4″:2″,2-quaterpyridine (L) were prepared in ethylacetate. These new complexes with the general formula [RE(N
The interaction of MP 11 as a model of antioxidatase enzymes with La 3+ was investigated. It was found that La 3+ can increase in the non planarity of heme and the content of α helix and β