Free-space optical circulator for interoperable laser communications
Transmit and receive paths in the optical C-band must be combined/split with close to 100% efficiency, while their wavelengths are separated by only a few 10s of nanometers. Free-space optical circulators using Magnetless Faraday Rotators (MFR) have been proposed for use in optical communications. We fabricate and test a free-space optical circulator designed for space applications, capable of surviving launch and operating in the expected temperature environment. We show that this system provides excellent performance over the C-band, allowing optical terminals to operate with arbitrary wavelengths and polarizations, constrained only by the capabilities of the optical modem.
A-Tech, LLC, a BlueHalo Co. (United States)
Mr. Paul Shubert is currently a Senior Scientist at A-Tech LLC, a BlueHalo Company, in Albuquerque, New Mexico, where he acts as technical director for laser communication programs. Mr. Shubert has over 40 years of experience in the design and analysis of stabilized optical pointing and tracking systems, including both high energy laser and free-space optical communication systems, gaining experience at Hughes Aircraft, Raytheon, Goodrich, and Schaefer Corporation, before his employment at ATA. Mr. Shubert has a BS in Applied Physics from the California Institute of Technology.