Long-term frequency stabilisation of a CW single-frequency laser using a high-precision wavelength meter

2008 ◽  
Author(s):  
Sergey Kobtsev ◽  
Stepan Kandrushin ◽  
Andrey Potekhin
Keyword(s):  
High Precision ◽  
Single Frequency ◽  
Term Frequency ◽  
Frequency Stabilisation ◽  
Frequency Laser

The Analysis and Design of a Large Stroke with High-Precision Polarized Laser Interferometer System

2016 ◽  
Vol 679 ◽  
pp. 129-134
Author(s):  
Wan Duo Wu ◽  
Qiang Xian Huang ◽  
Chao Qun Wang ◽  
Ting Ting Wu ◽  
Hong Xie
Keyword(s):  
High Precision ◽  
Measurement Accuracy ◽  
Laser Interferometer ◽  
Laser Interferometry ◽  
Phase Shifting ◽  
Single Frequency ◽  
Rejection Method ◽  
The Common ◽  
Frequency Laser ◽  
Polarization Phase

The technique utilizing single-frequency laser interferometry has very high measurement accuracy, but it has rigorous requirements for optical design which is affected by many factors. In order to achieve single-frequency laser interferometry with large stroke and high precision, the integral layout, the polarization phase shifting technique and the common mode rejection method are adopted to design the length interferometry system. This paper analyzes factors and design requirements which affect measurement accuracy with large stroke. Based on polarization phase shifting technique, the system employs the four-beam-signal detection technique and the common mode rejection method, to make a differential processing of four mutually orthogonal signals. Thus, the influences of zero-drift of intensity and environmental change on system are reduced. Combined with a 200 phase subdivision, the system achieves the resolution with 0.8 nm. Under the VC++ environment, the displacement measurement results are compensated and corrected according to the environmental parameters. Compared with the Renishaw XL-80 laser interferometer, the system has better stability in short term. In the measuring range of 60 mm, the effectiveness of the system is verified.

Short-term and long-term frequency characteristics of 2 μm single frequency Tm:YAG laser at room temperature

Laser Physics ◽  
2011 ◽  
Vol 21 (2) ◽  
pp. 356-361 ◽  
Author(s):  
C. T. Wu ◽  
Y. L. Ju ◽  
B. Q. Yao ◽  
L. Ke ◽  
Y. Z. Wang
Keyword(s):  
Room Temperature ◽  
Frequency Characteristics ◽  
Single Frequency ◽  
Short Term ◽  
Term Frequency ◽  
Tm:Yag Laser

scholarly journals MXene Core-Shell Nanosheets: Facile Synthesis, Optical Properties, and Versatile Photonics Applications

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1995
Author(s):  
Yunjia Wang ◽  
Shunxiang Liu ◽  
Feng Zhu ◽  
Yiyu Gan ◽  
Qiao Wen
Keyword(s):  
Gold Nanoparticles ◽  
Research Work ◽  
Mode Locking ◽  
Single Frequency ◽  
Core Shell ◽  
Complex Structures ◽  
Facile Synthesis ◽  
Laser Applications ◽  
Saturable Absorbers ◽  
Frequency Laser

In recent years, the transition metal carbonitrides(MXenes) have been widely applied to photoelectric field, and better performance of these applications was achieved via MXene complex structures. In our work, we proposed a MXene core-shell nanosheet composed of a Ti2C (MXene) phase and gold nanoparticles, and applied it to mode-locked and single-frequency fiber laser applications. The optoelectronic results suggested that the performances of these two applications were both improved when MXene core-shell nanosheets were applied. As a result, we obtained a mode-locking operation with 670 fs pulses, and the threshold pump power reached to as low as 20 mW. Besides, a single-frequency laser with the narrowest linewidth of ~1 kHz is also demonstrated experimentally. Our research work proved that MXene core-shell nanosheets could be used as saturable absorbers (SAs) to promote versatile photonic applications.

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