The Lunar Laser OCTL Terminal (LLOT) optical systems

W. Thomas Roberts; Malcolm W. Wright

doi:10.1117/12.2004415

22 March 2013 The Lunar Laser OCTL Terminal (LLOT) optical systems

Proceedings Volume 8610, Free-Space Laser Communication and Atmospheric Propagation XXV; 86100P (2013) https://doi.org/10.1117/12.2004415
Event: SPIE LASE, 2013, San Francisco, California, United States

Abstract

The Lunar Laser OCTL Terminal is an auxiliary ground station terminal for the Lunar Laser Communication Demonstration (LLCD). The LLOT optical systems exercise modulation and beam divergence control over six 10-W fiber-based laser transmitters at 1568 nm, which act as beacons for pointing of the space-based terminal. The LLOT design transmits these beams from distinct sub-apertures of the F/76 OCTL telescope at divergences ranging from 110 μrad to 40 μrad. LLOT also uses the same telescope aperture to receive the downlink signal at 1550 nm from the spacecraft terminal. Characteristics and control of the beacon lasers, methods of establishing and maintaining beam alignment, beam zoom system design, co-registration of the transmitted beams and the receive field of view, transmit/receive isolation, and downlink signal manipulation and control are discussed.

Citation Download Citation

W. Thomas Roberts and Malcolm W. Wright "The Lunar Laser OCTL Terminal (LLOT) optical systems", Proc. SPIE 8610, Free-Space Laser Communication and Atmospheric Propagation XXV, 86100P (22 March 2013); https://doi.org/10.1117/12.2004415

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available