Abstract
The characteristics of proton-exchanged MgO-doped LiNbO3 (MgO:LiNbO3) and LiTaO3 waveguides fabricated by the pyrophosphoric acid process are reported. Using this process, low-loss (0.4 dB/cm) channel waveguides in MgO:LiNbO3 have been realized at 633 nm without annealing. The optical damage in MgO:LiNbO3 waveguides at 441.6 nm wavelength is lower than that obtained in LiNbO3. For LiTaO3, by annealing, low-loss (0.3 dB/cm) channel waveguides can be fabricated by pyrophosphoric acid proton exchange. No optical damage was observed in the LiTaO3 waveguides even when the incident power was above 1 mW at 442 nm.
Original language | English |
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Pages (from-to) | 1059-1064 |
Number of pages | 6 |
Journal | Japanese journal of applied physics |
Volume | 31 |
Issue number | 4 R |
DOIs | |
Publication status | Published - 1992 Apr |
Externally published | Yes |
Keywords
- LiTaO
- MgO:LiNbO
- Proton exchange
- Pyrophosphoric acid
- Waveguide
ASJC Scopus subject areas
- Engineering(all)
- Physics and Astronomy(all)