Optical axis adjustment of laser beam transmission system

AbstractThis paper describes a standing-wave interferometer with two laser sources of different wavelengths, diametrically opposed and emitting towards each other. The resulting standing wave has an intensity profile which is moving with a constant velocity, and is directly detected inside the laser beam by two thin and transparent photo sensors. The first sensor is at a fixed position, serving as a phase reference for the second one which is moved along the optical axis, resulting in a frequency shift, proportional to the velocity. The phase difference between both sensors is evaluated for the purpose of interferometric length measurements.

Download Full-text

Multimode Cw Nd:YAG Laser Beam Transmission Through The Fiber Optic Delivery System

10.1117/12.938984 ◽

1986 ◽

Author(s):

Z. Jankiewicz ◽

M. Mindak ◽

W. Nowakowski ◽

J. Szydlak ◽

J. Wojcik

Keyword(s):

Laser Beam ◽

Delivery System ◽

Nd:Yag Laser ◽

Fiber Optic ◽

Beam Transmission

Download Full-text

Laser Beam Transmission by Inorganic Liquid Activated by Neodymium and Uranyl in Pulsed Excitation by Uranium Fission Fragments

Atomic Energy ◽

10.1007/s10512-017-0226-z ◽

2017 ◽

Vol 121 (6) ◽

pp. 448-455 ◽

Cited By ~ 1

Author(s):

P. P. D’yachenko ◽

P. A. Kulikov ◽

E. A. Seregina ◽

A. A. Seregin ◽

G. V. Tikhonov

Keyword(s):

Laser Beam ◽

Pulsed Excitation ◽

Fission Fragments ◽

Beam Transmission ◽

Uranium Fission

Download Full-text

Experimental study of laser beam transmission and power accounting in a large scale length laser plasma

Physics of Plasmas ◽

10.1063/1.874218 ◽

2000 ◽

Vol 7 (8) ◽

pp. 3388-3398 ◽

Cited By ~ 8

Author(s):

J. D. Moody ◽

B. J. MacGowan ◽

R. L. Berger ◽

K. G. Estabrook ◽

S. H. Glenzer ◽

...

Keyword(s):

Experimental Study ◽

Laser Beam ◽

Laser Plasma ◽

Large Scale ◽

Beam Transmission ◽

Scale Length

Download Full-text

The Multi-Beam Transmission System for 140 GHz Electron Cyclotron Heating on the Stellarator W7-X: Concept, Design and First Tests

Frequenz ◽

10.1515/freq.2001.55.9-10.263 ◽

2001 ◽

Vol 55 (9-10) ◽

Cited By ~ 2

Author(s):

Walter Kasparek ◽

Lars Empacher ◽

Volker Erckmann ◽

Gerd Gantenbein ◽

Frank Hollmann ◽

...

Keyword(s):

Transmission System ◽

Electron Cyclotron ◽

Concept Design ◽

Electron Cyclotron Heating ◽

Beam Transmission

Download Full-text

Atmospheric Characterization Based on Relative Humidity Control at Optical Turbulence Generator

Atmosphere ◽

10.3390/atmos10090550 ◽

2019 ◽

Vol 10 (9) ◽

pp. 550

Author(s):

Jhonny Villamizar ◽

Manuel Herreño ◽

Omar Tíjaro ◽

Yezid Torres

Keyword(s):

Relative Humidity ◽

Laser Beam ◽

Optical Axis ◽

Optical Turbulence ◽

Air Velocity ◽

Limited Effect ◽

Horizontal Path ◽

Physical Variables ◽

Turbulence Parameters ◽

Turbulence Generator

In atmospheric turbulence, relative humidity has been almost a negligible variable due to its limited effect, compared with temperature and air velocity, among others. For studying the horizontal path, a laser beam was propagated in a laboratory room, and an Optical Turbulence Generator (OTG) was built and placed along the optical axis. Additionally, there was controlled humidity inside the room and measuring of some physical variables inside the OTG device for determining its effects on the laser beam. The experimental results show the measurements of turbulence parameters C n 2 , l o , and σ I 2 from beam centroids fluctuations, where increases in humidity generated stronger turbulence.

Download Full-text