Title: Optical characterization of a neodymium-doped lithium-niobate-on-insulator (LNOI)
Authors: Haunhorst, Christian 
Hasse, Kore Yunxin 
Chen, Feng
Kip, Detlef  
Language: en
Subject (DDC): DDC::500 Naturwissenschaften und Mathematik
Issue Date: 2021
Publisher: OSA
Document Type: Article
Journal / Series / Working Paper (HSU): Optical materials express 
Volume: 11
Issue: 12
Page Start: 4007
Page End: 4014
Publisher Place: Washington, DC
A neodymium (Nd) doped lithium-niobate-on-insulator (LNOI) was fabricated from a lithium niobate (LN) substrate diffusion-doped with Nd prior to the LNOI fabrication process. Diffusion doping enables the fabrication of differently doped regions on a single LNOI substrate, a key advantage for future applications in highly integrated photonics. Fluorescence spectra, emission cross-section, fluorescence lifetime, and small-signal gain of Nd:LNOI were determined for the first time to our knowledge and compared with data published for diffusion-doped ridge or channel waveguides in LN substrates. For an 11 mm-long sample, we achieve a small-signal gain for p (s) polarization of about 14 (10) dB when pumping with a Ti:Sapphire laser, which is promising for future active components in Nd:LNOI like amplifiers and lasers.
Organization Units (connected with the publication): Experimentalphysik und Materialwissenschaften 
URL: https://api.elsevier.com/content/abstract/scopus_id/85119988609
ISSN: 2159-3930
DOI: 10.1364/OME.440852
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