Double cladding fiber characteristic parameters ( doped rare - earth concentration in core , confinement factor , absorption cross and emission cross ) are calculated theoretically 理论计算了双包层掺杂光纤特性参数(纤芯的稀土掺杂浓度、限制因子、吸收截面和发射截面) 。
Considering available conditions in the lab , a system with 2 channels is realized . spectral analysis in all important nodes is reported . this system is the basic of a coming all optical network 在此基础上，分析了色散补偿光纤的结构对色散的影响，包括纤芯对色散的影响和凹陷包层对色散的影响。
They manage the resource of optical cable , equipment , transmission path , and so on . the whole system is based on the equipment and optical cable subsystem 其中，设备管理子系统和光缆管理子系统是整个系统的基础，分别生成空闲的设备端口和光缆纤芯资源，光电路子系统则市对这些资源进行占用、管理。
They are new type of passive optical components , which are based on the periodical distribution of refraction index in fiber core . fiber gratings have several distinguished advantages over normal fibers 它是利用光纤材料的光敏特性在光纤的纤芯上建立的一种空间周期性折射率分布,其作用在于改变或控制光在该区域的传播行为方式。
The characteristics of core modes and surface modes in pbgf are investigated and the effects of core boundary on these modes are presented . 3 . the birefringence properties of form - induced and stress - induced hibi - pcfs are studied 研究了光子带隙光纤传导的纤芯模式和表面模式的特点,对纤芯截面位置对这些模式的影响特点进行了分析。
Fiber bragg grating is produced in fiber core . it has small volume and bragg reflect wavelength can be modulated by temperature , strain and so on . so it is widely used in fiber sensor field 布拉格光栅直接制作在光纤纤芯上，体积小具有确定的中心波长，布拉格反射波长可受温度、应变等物理量调制的特性，广泛的应用于光纤传感等领域。
First , we use a simple three - layer - model to gain the expressions of the electric field of cladding mode and its dispersion equation , at the same time , we present the expressions of the electric field of the core mode and its dispersion equation 因为要考虑包层模，所以首先用光纤的三层模型得到包层模的场分布和色散方程，同时也给出单模光纤纤芯基模的场分布和色散方程。
The models ’ simulation show that single mode operate in fiber amplifier at the core radii is 32 m , when the output pulse energy is to 2 . 69mj . compared with single mode fiber amplifier , the output pulse energy is more than 2 orders 通过数值仿真,我们得到了纤芯为32 m时,放大器仍然能够保持单模运转,此时输出的单脉冲能量达到2 . 69mj ,比传统的单模光纤放大器所能提取的脉冲能量大两个量级。
According to each tested data of material and single mode propagation requirement of signal in gain fiber , the core fiber and cladding are designed respectively , and a reasonable double cladding amplifiers fiber structure is showed in this paper 根据材料的各种性能测数据及信号光在增益介质内单模传输的要求,对铒镱共掺磷酸盐增益玻璃光纤的纤芯和包层进行了设计,提出双包层结构光纤设计方案。
The dual - core air - guided pbgfs couplers are designed and decoupling phenomenon has been found . coupling properties of the pbgfs with adjacent two air cores are evaluated . the decoupling point , where no power transfers between two cores , 对具有两个相邻纤芯的空气传导光子带隙光纤的传导模式和耦合特性进行了理论分析,在所分析的结构中发现了无耦合点,在该点两个相邻纤芯之间不发生能量交换。
