Optical apparatus for conversion of whispering-gallery modes into a free space gaussian like beam

Patent · Tue Dec 31 23:00:00 EST 1991

OSTI ID:868302

Stallard, Barry W ^[1]; Makowski, Michael A ^[1]; Byers, Jack A ^[2]

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1. Livermore, CA
2. Danville, CA

An optical converter for efficient conversion of millimeter wavelength whispering-gallery gyrotron output into a linearly polarized, free-space Gaussian-like beam. The converter uses a mode-converting taper and three mirror optics. The first mirror has an azimuthal tilt to eliminate the k.sub..phi. component of the propagation vector of the gyrotron output beam. The second mirror has a twist reflector to linearly polarize the beam. The third mirror has a constant phase surface so the converter output is in phase.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA
• DOE Contract Number: W-7405-ENG-48
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 5115482
• OSTI ID: 868302
• Country of Publication: United States
• Language: English

Related Subjects

/385/315/333/359/
apparatus
azimuthal
beam
component
constant
conversion
converter
efficient
efficient conversion
eliminate
free
free space
free-space
gaussian
gaussian-like
gyrotron
linearly
linearly polarized
millimeter
millimeter wave
millimeter wavelength
mirror
mode-converting
modes
optical
optical apparatus
optical converter
optics
output
output beam
phase
phi
polarize
polarized
propagation
reflector
space
space gaussian
surface
taper
third
third mirror
tilt
twist
vector
wavelength
whispering-gallery