Abstract
We report the spectroscopy of crystalline waveguide amplifiers operating in the telecom C-band. Thin films of erbiumdoped gadolinium lutetium potassium double tungstate, KGdxLuyEr1-x-y (WO4)2, are grown by liquid-phase epitaxy onto undoped potassium yttrium double tungstate (KYW) substrates and micro-structured by Ar+-beam etching. Channel waveguides with erbium concentrations between 0.45-6.35 × 1020 cm-3 are characterized. The transition cross-sections of interest are estimated. The effect of energy-transfer up-conversion (ETU) is experimentally investigated. Microscopic and macroscopic ETU parameters are extracted from a simultaneous analysis of 20 decay curves of luminescence on the transition 4I13/2 → 4I15/2. The correlation between ETU and the doping concentration is studied. Pump excited-state absorption (ESA) on the transition 4I11/2 → 4F7/2 is investigated via a direct ESA measurement using a double-modulation pump-probe technique. The effect of ESA is studied for different pump wavelengths. The pump wavelength of 984.5 nm is found to be favorable for the complete range of erbium concentrations.
Original language | English |
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Title of host publication | Integrated Optics: Devices, Materials, and Technologies XXI |
Publisher | SPIE |
Volume | 10106 |
ISBN (Electronic) | 9781510606531 |
DOIs | |
Publication status | Published - 16 Feb 2017 |
Event | SPIE Optoelectronics and Photonic Materials and Devices Conference, OPTO 2017 - The Moscone Center, San Francisco, United States Duration: 30 Jan 2017 → 1 Feb 2017 |
Conference
Conference | SPIE Optoelectronics and Photonic Materials and Devices Conference, OPTO 2017 |
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Abbreviated title | OPTO |
Country/Territory | United States |
City | San Francisco |
Period | 30/01/17 → 1/02/17 |
Keywords
- Crystalline waveguides
- EDWA
- Rare-earth doped
- Waveguide amplifiers
- 22/4 OA procedure