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Proceedings Paper

Reliable optical pump architecture for highly coherent lasers used in space metrology applications
Author(s): Hernan Erlig; Yueming Qiu; Ilya Poberezhskiy; Patrick Meras; James Wu
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Paper Abstract

Laser-based metrology has been identified as an enabling technology in the deployment of large, spaceborne observatories, where nanometer-level knowledge of fiducial displacement drives overall system performance. In particular, Nd:YAG NPRO (non-planar ring oscillator) based lasers have received considerable attention in this application because of their inherent high coherence at wavelengths of interest (1064 and 1319nm). However, the use of NPRO based lasers in decade long space missions is limited by typical 800nm-band pump laser diode wearout and random failure rates. Therefore, reliably achieving multi-hundred milliwatt NPRO power over prolonged mission lifetimes requires innovative pump architectures. In this paper we present a pump architecture capable of supporting continuous NPRO operation over 5.5yrs at 300mW with reliability exceeding 99.7%. The proposed architecture relies on a low-loss, high port count, all-fiber optical coupler to combine the outputs of multiple single-mode pump laser diodes. This coupler is capable of meeting the exacting environmental requirements placed by a space mission, such as SIM Lite.

Paper Details

Date Published: 21 July 2010
PDF: 11 pages
Proc. SPIE 7734, Optical and Infrared Interferometry II, 77342B (21 July 2010); doi: 10.1117/12.858180
Show Author Affiliations
Hernan Erlig, Jet Propulsion Lab. (United States)
Yueming Qiu, Jet Propulsion Lab. (United States)
Ilya Poberezhskiy, Jet Propulsion Lab. (United States)
Patrick Meras, Jet Propulsion Lab. (United States)
James Wu, Jet Propulsion Lab. (United States)

Published in SPIE Proceedings Vol. 7734:
Optical and Infrared Interferometry II
William C. Danchi; Françoise Delplancke; Jayadev K. Rajagopal, Editor(s)

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