Stokes injected Raman capillary waveguide amplifier

Patent · Mon Dec 31 23:00:00 EST 1979

OSTI ID:863651

Kurnit, Norman A ^[1]

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1. Santa Fe, NM

A device for producing stimulated Raman scattering of CO.sub.2 laser radiation by rotational states in a diatomic molecular gas utilizing a Stokes injection signal. The system utilizes a cryogenically cooled waveguide for extending focal interaction length. The waveguide, in conjunction with the Stokes injection signal, reduces required power density of the CO.sub.2 radiation below the breakdown threshold for the diatomic molecular gas. A Fresnel rhomb is employed to circularly polarize the Stokes injection signal and CO.sub.2 laser radiation in opposite circular directions. The device can be employed either as a regenerative oscillator utilizing optical cavity mirrors or as a single pass amplifier. Additionally, a plurality of Raman gain cells can be staged to increase output power magnitude. Also, in the regenerative oscillator embodiment, the Raman gain cell cavity length and CO.sub.2 cavity length can be matched to provide synchronism between mode locked CO.sub.2 pulses and pulses produced within the Raman gain cell.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4222011
• OSTI ID: 863651
• Country of Publication: United States
• Language: English

Related Subjects

/330/359/
additionally
amplifier
below
breakdown
capillary
capillary wave
capillary waveguide
cavity
cavity length
cavity mirror
cell
cell cavity
cells
circular
circularly
circularly polarize
conjunction
cooled
cryogenically
cryogenically cooled
density
device
diatomic
diatomic molecular
directions
embodiment
employed
extending
focal
fresnel
gas
increase
injected
injected raman
injection
injection signal
interaction
interaction length
laser
laser radiation
length
locked
magnitude
matched
mirrors
mode
molecular
molecular gas
opposite
optical
optical cavity
oscillator
output
output power
pass
pass amplifier
plurality
polarize
power
power density
produced
producing
provide
pulses
pulses produced
radiation
raman
raman capillary
raman scattering
reduces
regenerative
required
rhomb
rotational
scattering
signal
single
single pass
staged
stimulated
stimulated raman
stokes
stokes injected
synchronism
threshold
utilizes
utilizing
utilizing optical
waveguide
waveguide amplifier