Maru Koichi, Kobayashi Kohjiro, Fujii Yusaku
Department of Electronic Engineering, Gunma University, 1-5-1 Tenjin-cho, Kiryu, Gunma 376-8515, Japan.
Opt Express. 2010 Jan 4;18(1):301-8. doi: 10.1364/OE.18.000301.
A multi-point laser Doppler velocimeter (LDV) using the arrayed waveguide gratings (AWGs) with small wavelength sensitivity (less than 1/10 of that for a conventional LDV without the AWGs) is proposed, in which velocities at different points in the depth direction can be simultaneously measured with compact optical systems. The design and characteristics of the proposed LDV are investigated with the model using the grating equation of the AWGs. From our simulation results, the wavelength sensitivity for multiple measured points can be reduced to less than 1/10 of that for a conventional LDV without an AWG.
提出了一种采用阵列波导光栅（AWG）的多点激光多普勒测速仪（LDV），其具有小波长灵敏度（小于无AWG的传统LDV的1/10），该测速仪能够利用紧凑的光学系统同时测量深度方向上不同点的速度。利用AWG的光栅方程，通过模型研究了所提出的LDV的设计和特性。从我们的模拟结果来看，多个测量点的波长灵敏度可降低至无AWG的传统LDV的1/10以下。
