NASA NTRS · 20210014166
1.6-μm Er:YGG Waveguide Amplifiers
Abstract
We report on the fabrication and characterization of Er:YGG films suitable for waveguide amplifiers that could in principle be used in integrated path differential absorption lidar systems. Presented is our fabrication technique, comprising pulsed-laser-deposition growth of ~10 μm-thick crystalline films, their channeling via ultraprecision ductile dicing with a diamond-blade, producing optical quality facets and sidewalls, and amplifier performance. Net gain at 1572 nm and 1651 nm is obtained for the first time in Er-doped YGG waveguide amplifiers. Additionally, in a channel waveguide a maximum internal gain of 3.5 dB/cm at the 1533nm peak was realized. Recent crystal film quality improvements promise further performance enhancements needed for the intended application for high-peak power sources in the 1.6-μm spectral region targeting Earth observation systems for monitoring greenhouse gases.
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J I Mackenzie, S V Kurilchik, J J Prentice, J A Grant-Jacob, L G Carpenter, J C Gates, P G R Smith, H Riris, A W Yu, R W Eason. 2019-03-07. 1.6-μm Er:YGG Waveguide Amplifiers. https://ntrs.nasa.gov/citations/20210014166
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