Todd S. Rose
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View article: Stellar scintillation statistics and the impact of aperture averaging on space-to-ground optical communications
Stellar scintillation statistics and the impact of aperture averaging on space-to-ground optical communications Open
Statistical probability distributions characterizing received optical power fluctuations, or scintillation, enable performance predictions of space-to-ground optical communication systems. In this paper, we present measurements of stellar …
View article: Optical communications downlink from a 1.5U Cubesat: OCSD program
Optical communications downlink from a 1.5U Cubesat: OCSD program Open
In this presentation, we discuss the first demonstration of a lasercom downlink from a LEO 1.5U 2.3 kg CubeSat to our optical ground station at The Aerospace Corporation in El Segundo, CA. Two vehicles, AC7-B&C, built under NASA's Optical …
View article: Optical communications downlink from a low-earth orbiting 15U CubeSat
Optical communications downlink from a low-earth orbiting 15U CubeSat Open
In this article, we present the first demonstration of an optical communications downlink from a low-earth orbiting free-flying CubeSat. Two 1.5U vehicles, AC7-B&C, built under NASA's Optical Communications and Sensors Demonstration (OCSD)…
View article: A CubeSat-Based Optical Communication Network for Low Earth Orbit
A CubeSat-Based Optical Communication Network for Low Earth Orbit Open
A common challenge in developing small-satellite-based Earth-observation (EO) missions is getting the data to the ground. Typically, most satellites download data via space-to-ground radio-frequency (RF) links, communicating directly with …
View article: SBS reduction in nanosecond fiber amplifiers by frequency chirping
SBS reduction in nanosecond fiber amplifiers by frequency chirping Open
We demonstrate a technique for SBS reduction in a nanosecond Yb-fiber amplifier by imposing 1.19 GHz/ns frequency chirp on the seed pulses with a pulse-driven phase modulator. A nearly 9-fold increase in the SBS threshold was observed for …
View article: The NASA Optical Communications and Sensor Demonstration Program: Initial Flight Results
The NASA Optical Communications and Sensor Demonstration Program: Initial Flight Results Open
The NASA Optical Communications and Sensors Demonstration program was initiated in 2012 to demonstrate optical communications from orbit at a 5 Mbps rate and demonstrate proximity operations using CubeSats. The original two spacecraft effo…