FINAL REPORT OPTIMIZATION OF THE LASER

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B04770A002600020001-2
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 4
• Document Creation Date: December 28, 2016
• Document Release Date: December 9, 2002
• Sequence Number: 1
• Publication Date: October 12, 1965
• Content Type: REPORT

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This Document Contains
21. Pageso
Optimization of the Laser
12 October 1965
PREPAt~ED BY:
25X1
25X1
25X1
APPROVED BY:
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~~~~~
PAR 217
12 Oct 65
I SUMMARY
II SUBJECT
III TASK~PROBLEM
IV DISCUSSION
5
5
5
A.
B.
Theoretical Basis for Harmonic Doubling
Experiments in Producing Second Harmonic Radiation
6
7
C.
Reexamination of Project Goals
15
D.
Beam Uniformity Study
16
E.
Literature Search on Visible Light Lasers
16
V CONC
LUSIONS
17
VI RECO
MMENDATIONS
20
VII APPE
NDIX I
2T
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PAR 217
12 Oct 65
LIST OF ILLUSTRATIONS
1 Relative Output of 0.53 Micron Radiation Function
of Crystal Alignment to 1.06 Micron Input Beam 9
2 Harmonic Generating Schematic
3 KDP Crystal Orientation
~+ Expanded Beam of 0.53 Micron Radiation
5 Solid Material Lasers
6 Gas Laser Wavelengths
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PAR 2l7
12 Oct 65
SUMMARY
Visible, coherent radiation of 0.53 micron wavelength (blue-green) was
produ~;e~d . irx:. a. laboratory setup by harmonic doubling in a KDP crystal from
1.06 micron wavelength input radiation. A one millisecond, ~+-watt output
radiation pulse (~+ x ZO-3 joule s resulted from a 1~+0 joule input pulse
from a neodymium doped, borate glass laser, representing 2.8 x ZO-3 percent
conversion efficiency.
This technique for the generation of visible, coherent radiation is
useful only where a short, high peak-power pulse of radiation is required,
since the conversion efficiency is proportional to the level of the input
radiation power.
The availability of convenient, moderate-price continuous radiating
sources of coherent blue or green radiation, comparable to the present
He-IVe lasers, appears imminent.
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