静电陀螺监控器锚泊启动方法

静电陀螺监控器在海上应急启动时,要求载体等纬度匀速直线航行,这种条件很难满足.为此,通过分析静电陀螺监控器的启动原理和方法,完成设备在锚泊条件下海上启动试验.试验结果表明,锚泊启动过程中采取适当措施可使静电陀螺监控器在动态条件下完成启动和标定,导航精度接近码头启动的指标要求.这可在系统应急启动情况下降低对舰船航行工况的要求,为静电陀螺监控器在不同航行状态下的海上启动提供借鉴.     

A Stable Diffusion-Bonded Tm：YLF Bulk Laser with High Power Output at a Wavelength of 1889.5 nm

A high power diode-pumped diffusion-bonded Tm：YLF laser operating at 1889.5nm with a FWHM linewidth of less than 0.1 nm is reported. A Brewster plate and two Fabry-Perot etalons are inserted in the laser cavity for spectral narrowing and stabilization. Under an incident pump power of 136.8 W, 46.1 W of output power is achieved, corresponding to an optical-to-optical conversion efficiency of 33.7% and a slope efficiency of 42.8%. The laser wavelength shift of only 0.07nm with the incident pump power from 20.1 W to 136.8W is observed. The M2 factor at maximum output power is calculated to be 2.3 in the x-axis and 2.0 in the y-axis, respectively.