AFRL-DE-PS- TP-2007-1013 AFRL-DE-PS- TP-2007-1013 INTENSITY REDISTRIBUTION FOR MILTICONJUGATE ADAPTIVE OPTICS (Postprint) Troy Rhoadarmer Charles C. Beckner, Jr. Laura M. Klein 10 August 2006 Conference Proceedings APPROVED FOR PUBLIC RELEASE; DISTRIBUTION IS UNLIMITED. AIR FORCE RESEARCH LABORATORY Directed Energy Directorate 3550 Aberdeen Ave SE AIR FORCE MATERIEL COMMAND KIRTLAND AIR FORCE BASE, NM 87117-5776
REPORT DOCUMENTATION PAGE Form Approved OMB No. 0704-0188 Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Department of Defense, Washington Headquarters Services, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. 1. REPORT DATE (DD-MM-YYYY) 3. DATES COVERED (From - To) 2. REPORT TYPE CONFERENCE PROCEEDING 10 AUGUST 2006 4. TITLE AND SUBTITLE INTENSITY REDISTRIBUTION FOR MULTICONJUGATE ADAPTIVE OPTICS (Postprint) 3 JAN 03-1 JAN 06 5a. CONTRACT NUMBER IN HOUSE (DF297500) 5b. GRANT NUMBER 6. AUTHOR(S) Troy A. Rhoadarmer, Charles C. Beckner Jr., Laura M. Klein 5c. PROGRAM ELEMENT NUMBER 63605F 5d. PROJECT NUMBER 3152 5e. TASK NUMBER H0 5f. WORK UNIT NUMBER 01 7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) 8. PERFORMING ORGANIZATION REPORT NUMBER AFRL/RDS 3550 ABERDEEN AVE. SE KIRTLAND AFB, NM 87117-5776 9. SPONSORING / MONITORING AGENCY NAME(S) AND ADDRESS(ES) 10. SPONSOR/MONITOR S ACRONYM(S) AIR FORCE RESEARCH LABORATORY 3550 ABERDEEN AVE SE KIRTLAND AFB, NM 87117-5776 12. DISTRIBUTION / AVAILABILITY STATEMENT APPROVED FOR PUBLIC RELEASE; DISTRIBUTION IS UNLIMITED. AFRL/RDS 11. SPONSOR/MONITOR S REPORT NUMBER(S) AFRL-DE-PS-TP-2007-1013 13. SUPPLEMENTARY NOTES PUBLISHED IN CONFERENCE PROCEEDINGS OF SPIE VOL. 6306. (2006) GOVERNMENT PURPOSE RIGHTS 14. ABSTRACT MULTI-CONJUGATE ADAPTIVE-OPTICAL (MCAO) SYSTEMS HAVE BEEN PROPOSED AS A MEANS OF COMPENSATING BOTH INTENSITY AND PHASE ABERRATIONS IN A BEAM PROPAGATING THROUGH STRONG-SCINTILLATION ENVIRONMENTS. PROGRESS MADE ON IMPLEMENTING A MCAO SYSTEM AT THE STARFIRE OPTICAL RANGE (SOR), AIR FORCE RESEARCH LABORATORY, KIRTLAND AFB, IS DISCUSSED. AS A PRELIMINARY STEP TOWARD CONTROLLING A TWO DEFORMABLE MIRROR (DM) SYSTEM, THE FIRST-STAGE INTENSITY REDISTRIBUTION EXPERIMENT (FIRE) EXAMINES ONE ASPECT OF AN MCAO SYSTEM- CONTROL AND COMPENSATION OF WAVEFRONT INTENSITY. TWO WAVEFRONT SENSORS (WFS) AND A SINGLE DM ARE EMPLOYED FOR THIS EXPERIMENT. ONE WFS IS PLACED CONJUGATE TO THE DM WHILE THE SECOND WFS IS LOCATED AT A DISTANCE WHICH PRODUCES A DESIRED FRESNEL NUMBER FOR THE PROPAGATION BETWEEN THE WFSS. THE WFS MEASUREMENTS ARE INPUT TO A GERCHBERG-SAXTON BASED CONTROL ALGORITHM IN ORDER TO DETERMINE THE DM COMMANDS. THE PHASE PATTERN INTRODUCED BY THE DM IS CHOSEN SO PROPAGATION ALONG THE PATH BETWEEN THE TWO WFSS PRODUCES A DESIRED INTENSITY PROFILE AT THE SECOND WFS. THE SECOND WFS IS ALSO USED TO DETERMINE THE ACCURACY OF THE INTENSITY REDISTRIBUTION AND MEASURE ITS EFFECTS ON THE WAVEFRONT PHASE. IN THE NEXT PHASE OF MCAO DEVELOPMENT, A SECOND DM WILL BE ADDED CONJUGATE TO THE SECOND WFS IN ORDER TO CORRECT THE REMAINING PHASE ABERRATIONS. THE PAPER PRESENTS THE SETUP AND OPERATION FOR FIRE ALONG WITH INITIAL LABORTAROY RESULTS. 15. SUBJECT TERMS AMPLITUDE RESHAPING, GERCHBERG-SAXTON ALGORITHM, SCINTILLATION, MULTI-CONJUGATE ADAPTIVE OPTICS. 16. SECURITY CLASSIFICATION OF: 17. LIMITATION OF ABSTRACT a. REPORT UNCLASSIFIED b. ABSTRACT UNCLASSIFIED 18. NUMBER OF PAGES c. THIS PAGE UNCLASSIFIED SAR 11 19a. NAME OF RESPONSIBLE PERSON CHARLES BECKNER 19b. TELEPHONE NUMBER (include area code) 505-853-1069 Standard Form 298 (Re. 8-98) v Prescribed by ANSI Std. 239.18