Development of Multiply Sensitized Ho:YLF as a Laser Material

reportActive / Technical Report | Accession Number: ADA005627 | Open PDF

Abstract:

The results of a 12 month program to develop multiply sensitized HoYLF as a Q-switched laser material are presented. This material is the only material in which efficient laser operation at 2 micrometers has been reported at room temperature. Crystals were grown by the Top-Seeded Solution Technique, a modification of the Czochralski process. Extensive analysis of the effects of feed purity and growth technique on the crystalline quality and damage susceptibility of this material are presented. Extensive spectroscopic measurements are reported with direct observation of sensitization quantum yields of three the implications for optimization of the material for specific applications are discussed. Q-switched operation of different material compositions is reported calcite with LiNbO3. The composition 50 Erbium, 6. 7 Thulium, 0.34 Holmium has exhibited a 6.5 joule threshold and a 2.5 slope efficiency. A calculation of the thermal loading at fracture of a uniformly heated rod cooled at the surface is presented.

Author(s):
Chicklis, Evan P. ; Folweiler, Robert C. ; Naiman, Charles S. ; Gabbe, D. R. ; Linz, Arthur
Author Organization(s):
SANDERS ASSOCIATES INC NASHUA NH ELECTRO-OPTICS DIV
Descriptive Note:
Final rept. 15 Dec 1972-15 Jan 1974
Supplementary Note:
See also report dated Jan 1973, AD755530.
Pagination:
0131

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
YWN(5126)-REV-1, ECOM-73-0066-F
Contract/Grant Number(s):
DAAB07-73-C-0066, ARPA ORDER-1868
Monitor Series:
73-0066-F, ECOM
 Subject Terms
Joint Capability Areas:
JCA_5_Command and Control; JCA_5.3_Planning; JCA_1.2.7_Experimentation; JCA_5.5_Direct; JCA_5.5.1_Communicate Intent and Guidance; JCA_4.5.4_Requirements Definition; JCA_4.5_Operational Contract Support; JCA_4.4.1_Food Service; JCA_4.4_Logistics Services
Modernization Areas:
Quantum Science and Computing; Microelectronics
Communities of Interest:
Energy and Power Technologies
Descriptor(s):
*INFRARED LASERS, *INFRARED OPTICAL MATERIALS, *LASER MATERIALS, ABSORPTION SPECTRA, CRYSTAL DEFECTS, CRYSTAL GROWTH, DOPING, ERBIUM, FLUORIDES, FRACTURE(MECHANICS), HOLMIUM, LITHIUM COMPOUNDS, NIOBATES, OPTICAL PUMPING, PHASE DIAGRAMS, Q SWITCHING, QUANTUM EFFICIENCY, RADIATION EFFECTS, SINGLE CRYSTALS, STRENGTH(MECHANICS), SURFACE PROPERTIES, THERMAL PROPERTIES, THULIUM, XENON LAMPS, YTTRIUM COMPOUNDS
Field(s)/Group(s):
Lasers and Masers
Keyword(s):
*Lithium tetrafluoryttriate, Holmium glass lasers, YLF lasers, Top seeded crystal growth, Q switched lasers, Lithium niobates
Report Date:
1974 Oct 01