Integrated optic chip for laser threat identification

Alastair D. McAulay

doi:10.1117/12.852482

27 April 2010 Integrated optic chip for laser threat identification

Alastair D. McAulay

Proceedings Volume 7697, Signal Processing, Sensor Fusion, and Target Recognition XIX; 76971D (2010) https://doi.org/10.1117/12.852482
Event: SPIE Defense, Security, and Sensing, 2010, Orlando, Florida, United States

Abstract

In this conference last year, we proposed free-space gratings, Fizeau interferometers and wavefront estimation for detecting the different lasers deployed in the battlefield for range finding, target designation, communications, dazzle, location of targets, munitions guidance, and destruction. Since last year, advanced laser weapons of the electron cyclotron type, are in development, such as the free-electron laser, that are tunable and can, unlike conventional bound-electron state lasers, be used at any wavelength from microwaves to soft X-rays. We list the characteristics of the nine dominant laser weapons because we assume that the free-electron lasers will initially use one of the current threat wavelengths because of availability of components and instrumentation. In this paper we replace the free-space grating with a higher performing array waveguide grating integrated optic chip, similar to that used in telecommunications, because integrated circuits are more robust and less expensive. It consists of a star coupler that fans out amongst waveguides of different length followed by a star coupler that focuses different wavelengths to different outputs in order to separate them. Design equations are derived to cover a range of frequencies at specific frequency spacing relevant to this application.

Citation Download Citation

Alastair D. McAulay "Integrated optic chip for laser threat identification", Proc. SPIE 7697, Signal Processing, Sensor Fusion, and Target Recognition XIX, 76971D (27 April 2010); https://doi.org/10.1117/12.852482

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