Measurement of machinery vibration using laser mode split technology

1996 ◽  
Author(s):  
Shulian Zhang ◽  
Lijing Wu ◽  
Yan Li ◽  
Zhibeng Deng ◽  
Chengyun Yin
Keyword(s):  
Laser Mode ◽  
Mode Split

Investigation of high-resolution angle sensing with laser mode-split technology

1995 ◽  
Vol 34 (12) ◽  
pp. 1967 ◽  
Author(s):  
Shulian Zhang ◽  
Kelan Li ◽  
Ming Ren ◽  
Zhibing Deng
Keyword(s):  
High Resolution ◽  
Laser Mode ◽  
Mode Split

scholarly journals Design Approach for Reducing Cross-Axis Sensitivity in a Single-Drive Multi-Axis MEMS Gyroscope

Micromachines ◽  
2021 ◽  
Vol 12 (8) ◽  
pp. 902
Author(s):  
Hussamud Din ◽  
Faisal Iqbal ◽  
Byeungleul Lee
Keyword(s):  
Microelectromechanical Systems ◽  
Reduction Rate ◽  
Design Technique ◽  
Matching Method ◽  
Mems Gyroscope ◽  
Mode Split ◽  
The Cross ◽  
The Individual ◽  
Cross Axis ◽  
Ratio Matching

In this paper, a new design technique is presented to estimate and reduce the cross-axis sensitivity (CAS) in a single-drive multi-axis microelectromechanical systems (MEMS) gyroscope. A simplified single-drive multi-axis MEMS gyroscope, based on a mode-split approach, was analyzed for cross-axis sensitivity using COMSOL Multiphysics. A design technique named the “ratio-matching method” of drive displacement amplitudes and sense frequency differences ratios was proposed to reduce the cross-axis sensitivity. Initially, the cross-axis sensitivities in the designed gyroscope for x and y-axis were calculated to be 0.482% and 0.120%, respectively, having an average CAS of 0.301%. Using the proposed ratio-matching method and design technique, the individual cross-axis sensitivities in the designed gyroscope for x and y-axis were reduced to 0.018% and 0.073%, respectively. While the average CAS was reduced to 0.045%, showing a reduction rate of 85.1%. Moreover, the proposed ratio-matching method for cross-axis sensitivity reduction was successfully validated through simulations by varying the coupling spring position and sense frequency difference variation analyses. Furthermore, the proposed methodology was verified experimentally using fabricated single-drive multi-axis gyroscope.

Laser mode manipulation by intracavity dynamic holography: Application to mode selection

1999 ◽  
Vol 69 (2) ◽  
pp. 155-157 ◽  
Author(s):  
N. Huot ◽  
J.M. Jonathan ◽  
G. Pauliat ◽  
P. Georges ◽  
A. Brun ◽  
...  
Keyword(s):  
Mode Selection ◽  
Laser Mode ◽  
Dynamic Holography

Using the E22 transition of carbon nanotubes for fiber laser mode-locking

2010 ◽  
Vol 8 (2) ◽  
pp. 144-149 ◽  
Author(s):  
J.C. Travers ◽  
J. Morgenweg ◽  
E.D. Obraztsova ◽  
A.I. Chernov ◽  
E.J.R. Kelleher ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Fiber Laser ◽  
Mode Locking ◽  
Laser Mode

scholarly journals Versatile multi-wavelength ultrafast fiber laser mode-locked by carbon nanotubes

2013 ◽  
Vol 3 (1) ◽  
Author(s):  
Xueming Liu ◽  
Dongdong Han ◽  
Zhipei Sun ◽  
Chao Zeng ◽  
Hua Lu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Fiber Laser ◽  
Laser Mode ◽  
Multi Wavelength

The pattern of mode competition between two frequencies produced by mode split technology by tuning of the cavity length

1992 ◽  
Vol 90 (4-6) ◽  
pp. 279-282 ◽  
Author(s):  
Shulian Zhang ◽  
Kelan Li ◽  
Minxian Wu ◽  
Guofan Jin
Keyword(s):  
Cavity Length ◽  
Mode Competition ◽  
Mode Split

Femtosecond ytterbium-doped fiber laser mode-locked by carboxyl-functionalized graphene oxide saturable absorber

2017 ◽  
Vol 11 (1) ◽  
pp. 012702 ◽  
Author(s):  
Lei Hou ◽  
Qimeng Lin ◽  
Yonggang Wang ◽  
Zhendong Chen ◽  
Jiang Sun ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Fiber Laser ◽  
Saturable Absorber ◽  
Functionalized Graphene ◽  
Laser Mode ◽  
Functionalized Graphene Oxide
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