报道了一种采用ZnWO₄单晶作为拉曼晶体的2294 nm拉曼激光器。使用激光二极管端面抽运Tm∶YLF晶体产生1899 nm的基频光,采用内腔抽运ZnWO₄晶体,得到了2294 nm的一阶斯托克斯激光输出,最大功率为173 mW,最短脉宽为2.280 ns,最高峰值功率为25.292 kW,从实验上证实了ZnWO₄作为红外拉曼晶体的可行性。

A simple and compact optical fiber directional bending vector sensor with simultaneous measurement of temperature based on the Mach-Zehnder interferometer (MZI) is proposed and experimentally demonstrated. The device consists of a piece of photonic crystal fiber (PCF) sandwiched between two single mode fibers (SMFs) with a lateral offset splicing. It shows the capacity for recognizing positive and negative directions. Within a curvature range of ?7.13 m^-1 to 7.13 m^-1, the bending sensitivities of two resonant dips with opposite fiber orientations are obtained to be 0.484 nm/m^-1 and 0.246 nm/m^-1, respectively. This simple MZI is formed by invoking interference between LP₀₁ and LP₂₁ core modes, which leads to that the sensor is not sensitive to ambient refractive index (ARI). The temperature sensitivity has also been investigated. Two dips have obviously different sensitivities on the temperature and bending, so two parameters of both curvature and temperature can be distinguished and measured simultaneously by constructing a matrix and using one simple model interferometer.

We report a diode-end-pumped Q-switched YVO4/Nd:YVO4/YVO4 self-Raman second-Stokes laser at the wavelength of 1764 nm. With the incident pump power of 32 W and the pulse repetition frequency of 20 kHz, the maximal average output power at 1764 nm is up to 1.18 W, with the corresponding optical conversion efficiency of 3.69%. The highest pulse energy and peak power are 59 mJ and 31.7 kW, respectively.

A simple and compact fiber bending sensor based on the Mach-Zehnder interferometer was proposed. A photonic crystal fiber (PCF) with a length of 10 mm was spliced by collapsing air holes with two conventional single mode fibers to consist of an all fiber bending sensor. The sensitivity of 0.53 nm/m-1 was obtained at 1586 nm for the curvature range from 0 to 8.514 m-1. The temperature sensitivity was very low. The measurement error due to the temperature effect was about 8.68×10-3 m-1/℃, and the temperature effect in the curvature measurement could be ignored. This device can avoid the cross sensitivity of the temperature in the curvature measurement.

报道了一种基于色散补偿光纤内的马赫-曾德干涉效应的掺铒光纤环形激光器，得到了稳定的多波长激光输出。这种干涉效应有效地抑制了由均匀谱线展宽效应引起的不稳定的模式竞争，从而在室温下能够得到稳定的多波长激光输出。双波长激光输出比较稳定，峰值波动约小于1.1 dB，而三波长激光输出的峰值波动约为4 dB。

A long period fiber grating (LPFG) fabricated upon the all-solid photonic bandgap fiber by CO2 laser irradiation was investigated, and its resonance wavelength was at 1335.76 nm with a modulation depth of 15 dB and a 3-dB bandwidth of 2.6 nm. We studied its strain, temperature, and index sensor characteristics, the strain sensitivity of 0.992 pm/με was obtained by using linear fit, and the relationship between the refractive index and wavelength obeyed the distribution of quadratic function. Also, we demonstrated its temperature response was relatively insensitive (21.51 pm/℃).

A novel hollow core photonic crystal fiber (HCPCF) temperature sensor that is based on intensity modulation and metal-organic-coordinated Co-cage supramolecular material filled in the air holes of the fiber is introduced. Temperature-dependent character of the structure in the range of 90 to 190 oC has been investigated. The numerical analyses show that the confinement loss is both decreased linearly with temperature at 1 064 and 1 550 nm. For a 6.5-cm long HCPCF, the sensitivity of temperature is experimentally determined to be 9.5 10?2 dB/oC at 1 064 nm, and 7.9 \times 10?2 dB/oC at 1 550 nm, respectively.

利用800 nm飞秒激光脉冲作为光源，在标准通信单模光纤上直接刻写周期分别为100，200，300和400 μm的长周期光纤光栅(LPFG)，得到波长范围为1 280～1 680 nm的透射谱，分析研究了在不同刻写条件下LPFG透射谱的共振波长、透射深度和插入损耗等参数的变化。通过对比分析发现透射衰减与刻写长度、条数以及平台高度等有着一定的对应关系。优化实验参数制作出共振波长分别约为1 407，1 311，1 669，1 551 nm，透射深度分别约为24.0,22.3，27.8，23.4 dB，插入损耗分别约为2.5，1.7，3.2，2.0 dB的LPFG。