Estimation of Fiber-Waveguide Coupling Loss and Waveguide Propagation Loss by Spectral Analysis
| Autor: | B N Shivakiran Bhaktha, Pranabendu Ganguly, Romala Sattibabu |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Coupling
Materials science Coupling loss business.industry Lithium niobate Physics::Optics 02 engineering and technology Grating Polarization (waves) Waveguide (optics) Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention Wavelength chemistry.chemical_compound 020210 optoelectronics & photonics Optics chemistry law 0202 electrical engineering electronic engineering information engineering Electrical and Electronic Engineering business Monochromator |
| Zdroj: | IEEE Photonics Technology Letters. 31:517-520 |
| ISSN: | 1941-0174 1041-1135 |
| DOI: | 10.1109/lpt.2019.2899729 |
| Popis: | This letter presents a non-destructive and simple method for simultaneous measurement of fiber-waveguide coupling loss and propagation loss of single-mode optical waveguides. The experiment includes the coupling of a medium bandwidth laser source to optical waveguide under test and the analysis of its transmission spectra by using a grating monochromator. The technique has been demonstrated for a 46.5-mm-long fabricated titanium-indiffused lithium niobate (Ti:LiNbO3) waveguide for transverse magnetic polarization, and our first experiment yields a 2.18-dB fiber-waveguide coupling loss and a 0.58-dB/cm propagation loss at around 1557-nm transmitting wavelength. The measurement process needs no external perturbation, such as electric field or controlled heating, and hence is applicable for optical waveguides as-fabricated. |
| Databáze: | OpenAIRE |
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