基于自混合现象的新型干涉技术,由于其结构简单、低成本的优点,目前在位移、速度、振动、距离等测量领域得到广泛应用.采用边发射半导体激光器作为激光自混合速度测量系统的激光光源,针对不同表面类型、采样时间、注入电流、信号处理系统对自混合测速结果的影响进行实验研究和讨论分析.结果表明不同反馈和采样时间(0.1s,1s)均能满足高精度测速要求.同时,实验中采用合适的激光工作电流(激光器阈值电流1.1倍以上)并结合零点控制技术能够获得信噪比更大激光自混合测速信号.这些结论对深入分析自混合信号的产生机理以及半导体激光自混合测量系统的优化具有参考意义.
参考文献
| [1] | Rudd M J,Gorniika E.A laser Doppler velocimeter employing the laser as a mixer-ocsillator[J].J.Phy.E,1968,1(5):723-726. |
| [2] | Lu L,Gui H Q,Xie J P,et al.Effect of external cavity length on self-mixing signals in multilongitudinal-mode FP-LD[J].Appl.Opt,2005,44(4):568-571. |
| [3] | Sudo O T,Otsukal K.Three-channel three-dimensional self-mixing thin-slice solid-state laser-Doppler measurements[J].Appl.Opt,2009,48(3):609-616. |
| [4] | Guo D,Wang M.Self-mixing interferometry based on a double-modulation technique for absolute distance mear surement[J].Appl.Opt,2007,46(9):1486-1491. |
| [5] | Churnside J H.Laser Doppler velocimetry by modulating a CO2 laser with backscattered light[J].Appl.Opt,1984,23(1):61-66. |
| [6] | Shinohara S,Mochizuki A,Yoshida H,et al.Laser Doppler velocimeter using the self-mixing effect of a semiconductor laser diode[J].Appl.Opt,1986,25(9):1417-1419. |
| [7] | Shimizu E T.Directional discrimination in the self-mixing type laser Doppler velocimeter[J].Appl.Opt,1987,26(21):4541-4544. |
| [8] | He D Y,Zhao T P,Wang H Q,et al.High precision and wide dynamic range single mode VCSEL self-mixing LDV system with exactly direction discrimination[J].Chinese Journal of Quantum Electronics(量子电子学报),2008,25(2):235-239 (in Chinese). |
| [9] | Wang W M,Grattan K T V,Palmer A W,et al.Self-mixing interference inside a single-mode diode laser for optical sensing applications[J].IEEE Journal of Lightwave Technology,1994,12(9):1577-1587. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%