1. Futron Corporation, “Space Transportation Costs: Trends in Price Per Pound to Orbit 1990-2000,” Sept. 6, 2002.
2. High-sensitivity variable-rate transmit/receive architecture,;Caplan,1999
3. A novel variable-rate pulse-position modulation system with near quantum limited performance,;Stevens,1999
4. Demonstration of 2.5-Gslot/s optically- preamplified M-PPM with 4 photons/bit receiver sensitivity,;Caplan,2005
5. Demonstration of multi-rate thresholded preamplified 16-ary pulse-position modulation,;Spellmeyer,2010