‍OEwaves, Inc., a leader in photonic technologies, has been awarded a NASA Small Business Innovation Research (SBIR) Phase II contract to develop a compact, high-performance laser system tailored for cesium (Cs) atom interferometry applications. This project aims to advance the capabilities of space-based quantum gravity gradiometers (QGG), instruments crucial for precise gravitational measurements in space missions.​

Project Overview

Under this contract, OEwaves will design, assemble, test, and demonstrate a fiber-based laser system that meets NASA's stringent requirements for space deployment. The system will integrate two frequency-stabilized, ultra-narrow linewidth lasers with an optical amplifier, all within a single package featuring polarization-maintaining (PM) fiber output.​

Key Specifications

• Linewidth: Less than 1 kHz
• Wavelengths: Aligned with Cs D lines at 852 nm and 894 nm
• Output Power: 300 mW
• Optical Module Volume: Under 500 cubic centimeters (excluding driving electronics)
• Total Power Consumption: Under 10 watts
• Modulation Frequency: Up to 10 MHz
• System Lifetime Goal: Over 50,000 hours​

Development Plan

OEwaves will undertake the following tasks during the Phase II effort:​

1. Design Optimization: Develop a physical model and design the optimal optical and mechanical package for the laser system prototype.
2. Analytical and Numerical Studies: Conduct extensive analyses, including thermo-opto-mechanical evaluations of the entire system.
3. Resonator Fabrication: Produce resonators with optimal morphology and host materials to achieve the targeted linewidth and frequency stability greater than 10⁻¹⁴.
4. System Assembly and Testing: Assemble the complete laser system and validate its performance parameters in collaboration with NASA.
5. Final Reporting: Prepare and submit a comprehensive Phase II Final Report detailing the development process and outcomes.​

Significance

This project represents a significant step forward in miniaturizing high-precision laser systems for space applications. The successful development of this laser system will enhance the performance of quantum gravity gradiometers, contributing to more accurate gravitational measurements and advancing our understanding of Earth's geophysical processes.​

OEwaves' expertise in ultra-low noise photonic solutions positions them as a key player in the advancement of space-based quantum sensing technologies.​

For more information, please visit the official SBIR award page: SBIR Award 212022.

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