Wideband Waveguide Acousto-Optic Bragg Cell.

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Abstract:

The results of an effort to improve the performance specifications of acousto-optic Bragg cells are reported. Various configurations of multiple tilted SAW transducers, including phased arrays, have been investigated theoretically and experimentally to find the most efficient combination which would provide a 700 MHz acousto-optic bandwidth. Investigated were Bragg cells fabricated on Ti diffused LiNb03 waveguides as well as Ti diffused LiNb03 waveguides with Nb205 thin film overlays. Theoretical and experimental investigations were based on the use of a CW semiconductor laser. Experimentally determined optical field profiles were used to calculate the diffraction efficiency and RF power requirements across the passband. A Bragg cell consisting of 6 tilted transducers was designed, fabricated, and tested, exhibiting 700 MHz bandwidth and 2.8RF watt diffraction efficiency. The Bragg cell operates between 770 MHz and 1470 MHz.

Author(s):
Davis, R. L. ; Hickernell, F. S. ; Richard, F. V. ; Ward, R. L.
Author Organization(s):
MOTOROLA INC SCOTTSDALE AZ GOVERNMENT ELECTRONICS DIV
Descriptive Note:
Final rept. 27 May 80-25 Sep 81,
Pagination:
0107

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

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

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
AFWAL-TR-81-1289
Contract/Grant Number(s):
F33615-80-C-1048
Task Number(s):
02
Project Number(s):
2001
Monitor Series:
TR-81-1289
 Subject Terms
Modernization Areas:
Directed Energy
Communities of Interest:
Advanced Electronics
Descriptor(s):
*INTEGRATED SYSTEMS, *WAVEGUIDES, *SIGNAL PROCESSING, *ACOUSTOOPTICS, *TRANSDUCERS, *CONTINUOUS WAVE LASERS, PHASED ARRAYS, L BAND, SUBSTRATES, ULTRAHIGH FREQUENCY, INSERTION LOSS, BROADBAND, DIFFRACTION, BRAGG ANGLE, OPTICAL EQUIPMENT COMPONENTS, QUARTZ, THIN FILMS, DIFFUSION, NIOBATES, LITHIUM COMPOUNDS, TITANIUM
Field(s)/Group(s):
Lasers and Masers, Acoustics, Optics
Keyword(s):
Cells(Bragg), Lithium niobates, Niobium pentoxide, YZ cut quartz, WUAFWAL20010273, PE62204F
Report Date:
1982 Feb 01