High energy, narrow linewidth 1572nm ErYb-fiber based MOPA for a multi-aperture CO2 trace-gas laser space transmitter

Doruk Engin; Brian Mathason; Mark Stephen; Anthony Yu; He Cao; Jean-Luc Fouron; Mark Storm

doi:10.1117/12.2212481

11 March 2016 High energy, narrow linewidth 1572nm ErYb-fiber based MOPA for a multi-aperture CO₂ trace-gas laser space transmitter

Doruk Engin, Brian Mathason, Mark Stephen, Anthony Yu, He Cao, Jean-Luc Fouron, Mark Storm

Author Affiliations +

Proceedings Volume 9728, Fiber Lasers XIII: Technology, Systems, and Applications; 97282S (2016) https://doi.org/10.1117/12.2212481
Event: SPIE LASE, 2016, San Francisco, California, United States

Abstract

A cladding-pumped, LMA ErYb fiber-based, amplifier is presented for use in a LIDAR transmitter for remote sensing of atmospheric CO₂ from space. The amplifier is optimized for high peak power, high efficiency, and narrow linewidth operation at 1572.3nm. Using highly reliable COTS components, the amplifier achieves 0.5kW peak power (440uJ pulse energy), 3.3W average power with transform limited (TL) linewidth and M²<1.3. The power amplifier supports a 30% increase in pulse energy when linewidth is increased to 100MHz. A preliminary conductively cooled laser optical module (LOM) concept has size 9x10x1.25 in (113 in³) and estimated weight of 7.2lb (3.2 kg). Energy scaling with pulse width up to 645uJ, 1.5usec is demonstrated. A novel doubleclad ErYb LMA fiber (30/250um) with high pump absorption (6 dB/m at 915nm) was designed, fabricated, and characterized for power scaling. The upgraded power amplifier achieves 0.8kW peak power (720uJ pulse energy) 5.4W average power with TL linewidth and M²<1.5.

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Doruk Engin, Brian Mathason, Mark Stephen, Anthony Yu, He Cao, Jean-Luc Fouron, and Mark Storm "High energy, narrow linewidth 1572nm ErYb-fiber based MOPA for a multi-aperture CO₂ trace-gas laser space transmitter", Proc. SPIE 9728, Fiber Lasers XIII: Technology, Systems, and Applications, 97282S (11 March 2016); https://doi.org/10.1117/12.2212481

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