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A discriminant for on-orbit wavelength measurement
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Paper Abstract

We studied and demonstrated a wavelength discriminant structure that consists of one circulator, one or more Fiber Bragg Gratings and two photodiodes. The discriminants are built in NASA’s LCRD (Laser Communication Relay Demonstration) flight modems to measure the transmitter and pilot laser wavelengths on orbit. The performance of the discriminants is evaluated in ambient and thermal vacuum chamber environment. The paper reports on results of a few discriminants working at different wavelengths and power levels. The trending of the discriminant performance under ambient and TVAC cycles is discussed. The discriminant can achieve sub-picometer wavelength accuracies if calibrated properly.

Paper Details

Date Published: 4 March 2019
PDF: 6 pages
Proc. SPIE 10910, Free-Space Laser Communications XXXI, 1091022 (4 March 2019); doi: 10.1117/12.2513916
Show Author Affiliations
Hua Jiao, NASA Goddard Space Flight Ctr. (United States)
Rafael A. Garcia, NASA Goddard Space Flight Ctr. (United States)
Victor Bigio, NASA Goddard Space Flight Ctr. (United States)
Richard L. Butler, NASA Goddard Space Flight Ctr. (United States)


Published in SPIE Proceedings Vol. 10910:
Free-Space Laser Communications XXXI
Hamid Hemmati; Don M. Boroson, Editor(s)

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