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Ruggedized MEMS-VCSELwith high speed data acquisition for Fiber Optic Sensing System

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: 80NSSC22PB161
Agency Tracking Number: 221708
Amount: $149,998.00
Phase: Phase I
Program: SBIR
Solicitation Topic Code: A2
Solicitation Number: SBIR_22_P1
Timeline
Solicitation Year: 2022
Award Year: 2022
Award Start Date (Proposal Award Date): 2022-07-19
Award End Date (Contract End Date): 2023-01-25
Small Business Information
601C Pine Avenue
Goleta, CA 93117-8317
United States
DUNS: 132398913
HUBZone Owned: No
Woman Owned: No
Socially and Economically Disadvantaged: No
Principal Investigator
 Vijaysekhar Jayaraman
 (805) 448-4008
 vijay@praevium.com
Business Contact
 Vijaysekhar Jayaraman
Title: VJpraevium
Phone: (805) 448-4008
Email: vijay@praevium.com
Research Institution
N/A
Abstract

This work will develop and validate a new wavelength swept laser for fiber optic sensing systems (FOSS). Existing FOSS technology usesnbsp;external cavity tunable lasers, whichnbsp;are assembled from discrete components with precision intracavitynbsp;laser alignments. This creates cost and complexity, inhibits volume scaling,nbsp;and inhibits ruggedization.nbsp;nbsp;These factors havenbsp;in turn inhibited widespread commercial adoption of FOSS in avionics applications and precluded embedding this technology into commercial flight vehicles for continuous in-flight structural health monitoring.nbsp;nbsp;Praevium will endeavor to solve these problems by building on its prior work done in developing micro-electromechanical systems tunable vertical cavity surface emitting lasers (MEMS-VCSELs) for swept source optical coherence tomography (SSOCT). Although FOSS employs optical frequency domain reflectometry (OFDR), which is similar to SSOCT, thenbsp;much longer interferometer delays and much lower wavelength sweep rates employed in FOSS require the effects of Brownian motion on the MEMS actuatornbsp;to be mitigated.nbsp;In this work, Praevium Research will minimize the effects of Brownian motion through re-design of the MEMS actuator structure. Additionally, Praeviumnbsp;will develop a low weight and power ruggedized butterfly package based on newly emerging electrically pumped MEMS-VCSELs, eliminating costly and bulky components such as the pump laser, isolator, and wavelength division multiplexer needed in commercial optically pumped devices. Praevium will work with subcontractor Sensuron, who has expertise in FOSS to evaluate the newly developed laser. Sensuron will evaluate the Praevium MEMS-VCSEL in various interferometer configurations, and develop high speed data acquisition and computation to integrate the new laser into a fiber bragg grating based sensor measurement. Results will be compared with existing laser sources.nbsp;

* Information listed above is at the time of submission. *

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