Differential Retro-Detection for Remote Sensing Applications

A retro-detection technique is introduced for simultaneous optical retroreflection, detection, and control in bidirectional sensor links. An architecture with three orthogonal photodiodes (PDs) is used to retroreflect incident light and sample the incident optical signals. Such a system establishes a two-way (bidirectional) optical link. Moreover, the three photocurrent signals can be used in differential combinations for active control and optimization of the alignment. The theory and methodology for the optical retroreflection, detection, and control characteristics are presented, and the technique is verified experimentally with a silicon PD retro-detection prototype. The active remote sensing capabilities of the retrodetector are found to be successful.

[1]  Joseph M. Kahn,et al.  Free-space heterochronous imaging reception of multiple optical signals , 2001, Conference Record of Thirty-Fifth Asilomar Conference on Signals, Systems and Computers (Cat.No.01CH37256).

[2]  R.T. Howard,et al.  Orbital Express Advanced Video Guidance Sensor , 2008, 2008 IEEE Aerospace Conference.

[3]  I. S. Hudiara,et al.  Passive remote sensing of a buried object using a 29.9 GHz radiometer , 2005, 2005 Asia-Pacific Microwave Conference Proceedings.

[4]  Jin Kong,et al.  Active Remote Sensing of Layered Random Media , 1979, IEEE Transactions on Geoscience Electronics.

[5]  Gabor Karsai,et al.  Smart Dust: communicating with a cubic-millimeter computer , 2001 .

[6]  J. Abshire,et al.  Laser Sounder for Active Remote Sensing Measurements of CO2 Concentrations , 2008, 2008 IEEE Aerospace Conference.

[7]  Randy H. Katz,et al.  Emerging challenges: Mobile networking for “Smart Dust” , 2000, Journal of Communications and Networks.

[8]  Dominic C. O'Brien,et al.  Optical wireless communications for micromachines , 2006, SPIE Optics + Photonics.

[9]  Mohammad Ilyas,et al.  Smart Dust , 2006 .

[10]  Jin Kong,et al.  Active Microwave Remote Sensing of an Anisotropic Random Medium Layer , 1985, IEEE Transactions on Geoscience and Remote Sensing.

[11]  Simon Yueh,et al.  Polarimetric passive remote sensing of wind-generated sea surfaces and ocean wind vectors , 1993, Proceedings of OCEANS '93.

[12]  Dominic C. O'Brien,et al.  Design and implementation of optical wireless communications with optically powered smart dust motes , 2009, IEEE Journal on Selected Areas in Communications.

[13]  J. Lee,et al.  Passive remote sensing of three-layered anisotropic random media , 1993, Proceedings of IGARSS '93 - IEEE International Geoscience and Remote Sensing Symposium.

[14]  Xian Jin,et al.  Omni-directional characteristics of composite retroreflectors , 2009 .

[15]  J. Kong,et al.  Active Microwave Remote Sensing of an Anisotropic Random Medium Layer , 1985, IEEE Transactions on Geoscience and Remote Sensing.

[16]  Optimization of the displacement sensing precision of a reflected beam sensor in outdoor environment , 2004, Proceedings of the 21st IEEE Instrumentation and Measurement Technology Conference (IEEE Cat. No.04CH37510).