A Study of Transverse Modes of Ruby Lasers Using Beat-Frequency Detection and Fast Photography

1964 ◽  
Vol 3 (8) ◽  
pp. 967 ◽  
Author(s):  
C. Martin Stickley
Keyword(s):  
Beat Frequency ◽  
Transverse Modes ◽  
Frequency Detection

Research on Orthogonal Polarized Dual-Frequency Laser Beat Frequency Detection

2010 ◽  
Vol 44-47 ◽  
pp. 1007-1011
Author(s):  
Gui Ling Sun ◽  
Guang Jiao ◽  
Bo Liu ◽  
Wei Xiang Li
Keyword(s):  
Beat Frequency ◽  
Dual Frequency ◽  
Frequency Detection ◽  
Frequency Laser

Improved laser frequencies and Dunham coefficients for isotopically substituted carbon monoxide

1979 ◽  
Vol 57 (5) ◽  
pp. 677-686 ◽  
Author(s):  
R. M. Dale ◽  
M. Herman ◽  
J. W. C. Johns ◽  
A. R. W. McKellar ◽  
S. Nagler ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Beat Frequency ◽  
Co Laser ◽  
Mass Scaling ◽  
Frequency Detection ◽  
Isotopic Species ◽  
Least Squares Fit ◽  
Laser Frequencies ◽  
Simple Mass ◽  
Grating Spectroscopy

New measurements of carbon monoxide laser frequencies in the 5.3 to 7.2 μm region have been made using the techniques of infrared grating spectroscopy and heterodyne beat frequency detection. The observations concentrated on the rarer isotopic species 13C16O, 12C18O, and 13C18O, and on the lower frequency region of CO laser oscillation, where less data have previously been available. The new results have been combined with a large amount of previous data in a simultaneous least-squares fit involving all known isotopic species of CO. The resulting parameters are a set of 'reduced' Dunham coefficients and a set of mass-scaling factors which describe how their isotopic variation differs from the simple mass-dependence normally assumed. Laser frequencies calculated from the new Dunham coefficients are improved from those previously available, especially in the relative accuracy of each isotope compared to the others, and they should prove useful in spectroscopic applications of the CO laser. Comprehensive tables of Dunham coefficients for all CO isotopes and of calculated laser frequencies for 12C16O,13C16O, 12C18O, and 13C18O are given in the paper and in an Appendix.

scholarly journals Investigation on the Formation of Laser Transverse Pattern Possessing Optical Lattices

2022 ◽  
Vol 9 ◽  
Author(s):  
Xin Wang ◽  
Zilong Zhang ◽  
Yuan Gao ◽  
Suyi Zhao ◽  
Yuchen Jie ◽  
...  
Keyword(s):  
Optical Lattices ◽  
Beat Frequency ◽  
Transverse Mode ◽  
Mode Locking ◽  
Vortex Lattices ◽  
Transverse Modes ◽  
Fixed Phase ◽  
Phase Singularities ◽  
Complex Symmetric ◽  
Transverse Pattern

Optical lattices (OLs) with diverse transverse patterns and optical vortex lattices (OVLs) with special phase singularities have played important roles in the fields of atomic cooling, particle manipulation, quantum entanglement, and optical communication. As a matter of consensus until now, the OL patterns are generated by coherently superimposing multiple transverse modes with a fixed phase difference through the transverse mode locking (TML) effect. There are phase singularities in the dark area of this kind of OL pattern, so it is also called OVL pattern. However, in our research, it is found that some high-order complex symmetric OL patterns can hardly be analyzed by TML model. Instead, the analysis method of incoherent superposition of mode intensity could be applied. The OL pattern obtained by this method can be regarded as in non-TML state. Therefore, in this article, we mainly study the distinct characteristics and properties of OL patterns in TML and non-TML states. Through intensity comparison, interferometry, and beat frequency spectrum, we can effectively distinguish OL pattern in TML and non-TML states, which is of significance to explore the formation of laser transverse pattern possessing OL.

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