1Key Issues in Modulating Retroreflector Technology


The long term goal of this effort is to develop an optical modulating retroreflector which can support data rates of a Mbps and higher. Inherent to this goal is the ability of the device to exploit the high bandwidth inherent in optical wavelengths, be covert, jam resistant, and alleviate the rf frequency allocation problem. The device would eliminate the need to fly a telescope for onboard acquisition and tracking characteristic of a one-way laser and therefore significantly reduces payload mass, size, and complexity. Figure 1 illustrates the concept. OBJECTIVES Optical communications using modulating retroreflectors requires a fast modulator technology to provide high data throughput. Over the last decade multiple quantum well (MQW) modulators have been used extensively in fiber optic communication systems to allow high bit rate communications. In this effort, we will address some of the technical challenges in adapting this technology to free space optical communications using retroreflectors. In particular, this application requires a large area modulator that can work in the wavelength range of 0.8-1.1 µm. This wavelength range is important because many good laser sources are available there. These include laser diodes, Ti:Sapphire lasers, and Nd:YAG lasers, all of which are candidates for transmitters in laser communication systems. The development of modulating retroreflector technology requires parallel development of modulator technology and optical retroreflector communications technology. The interplay of these two areas is important because the requirements of the optical retroreflector communications link feed directly into the optimal design of the multiple quantum well modulator. This effort examines some of the most important driving issues in both these technological areas

Similar works

Full text

oai:CiteSeerX.psu: time updated on 11/2/2017

This paper was published in CiteSeerX.

Having an issue?

Is data on this page outdated, violates copyrights or anything else? Report the problem now and we will take corresponding actions after reviewing your request.