Title:
NESTED LOOP COHERENT BEAM COMBINING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2014/081582
Kind Code:
A3
Abstract:
A nested loop system (100) for combining coherent laser beams, the system including a master oscillator (105) configured to generate a master-oscillator output (108) and couple it to an outer loop beam splitter (110) configured for splitting the master-oscillator output (108) and for separately coupling each split beams to a different one of the phase modulators (115 or 125); multiple laser amplifiers (130) each configured for emitting one of the laser beams (134); an output beam splitter (135) configured for sampling each laser beam and for coupling each sampled laser beam (139b) to an inner loop feedback module (210) (150,155,160,165,170); an output beam sampler (145) configured for splitting the combined beam (144) into a primary and a sampled output beams (149a and 149b), respectively; and an outer loop detector (150) configured to receive the sampled output beam (149b) and transfer an electronic signal of the sampled output beam, i.e. the outer loop detector signal (154), to a processor. The sampled laser beams (139b) are coupled through the inner loop feedback module (210) to multiple inner loop phase modulators (125), each paired with one of the laser amplifiers (130). For each laser amplifier (130) the inner loop feedback module (210) is configured to use the outer loop detector signal (154) and the sampled laser beam (139b) associated with said each laser amplifier (130) to create a respective inner loop feedback signal (174) and to couple each inner loop feedback signal (174) to said each laser amplifier (130) paired inner loop phase modulator (125).
Inventors:
GOODNO GREGORY D (US)
CHEUNG ERIC (US)
LONG JR WILLIAM H (US)
CHEUNG ERIC (US)
LONG JR WILLIAM H (US)
Application Number:
PCT/US2013/069039
Publication Date:
August 07, 2014
Filing Date:
November 08, 2013
Export Citation:
Assignee:
NORTHROP GRUMMAN SYSTEMS CORP (US)
International Classes:
H01S3/10; H01S3/13; H01S3/23
Domestic Patent References:
| WO2008045655A2 | 2008-04-17 |
Foreign References:
| US20070201795A1 | 2007-08-30 | |||
| EP0980123A2 | 2000-02-16 | |||
| US20120188626A1 | 2012-07-26 | |||
| US20120212802A1 | 2012-08-23 | |||
| US20110032604A1 | 2011-02-10 | |||
| US7058098B1 | 2006-06-06 | |||
| US7187492B1 | 2007-03-06 |
Other References:
JESSE ANDEREGG ET AL: "Coherently coupled high-power fiber arrays ", PROCEEDINGS OF SPIE, vol. 6102, 9 February 2006 (2006-02-09), pages 61020U - 61020U-5, XP055103265, ISSN: 0277-786X, DOI: 10.1117/12.650138
M. A. VORONTSOV ET AL: "Stochastic parallel-gradient-descent technique for high-resolution wave-front phase-distortion correction", JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A, vol. 15, no. 10, 1 October 1998 (1998-10-01), pages 2745, XP055103264, ISSN: 1084-7529, DOI: 10.1364/JOSAA.15.002745
M. A. VORONTSOV ET AL: "Stochastic parallel-gradient-descent technique for high-resolution wave-front phase-distortion correction", JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A, vol. 15, no. 10, 1 October 1998 (1998-10-01), pages 2745, XP055103264, ISSN: 1084-7529, DOI: 10.1364/JOSAA.15.002745
Attorney, Agent or Firm:
PATTI, Carmen B. (LLCOne North LaSalle Street,44th Floo, Chicago IL, US)
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