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Er2SiO5 crystal shows strong and sharp Er-related PL emissions at room temperature. It is expected as a basic material of waveguide amplifiers in silicon photonics. Recently we have proposed Er2SiO5 crystal preparation by Pulsed Laser Deposition (PLD) method for device applications. In this paper we introduce PLD approach to modify crystalline structures of Er2SiO5 crystal and the related materials...
We consider that the multilayered organic DFB structure proposed in this study would be a promising concept for development of the compact-type multicolour laser light source. The white laser light source, which shows simultaneous R, G, and B colour DFB lasing, will be realized by the marginal optimisations of the operation wavelengths and relative emission intensities.
Most surface acoustic wave (SAW) radio frequency (RF) filters and duplexers have the Al-electrodes/36-48degYX-LiTaO3 substrate structure, which has an optimum coupling factor and an optimum reflection coefficient but does not have a good temperature coefficient of frequency (TCF). The TCF can be improved by depositing SiO2 film with positive TCF on a transversal SAW filter consisting of a substrate...
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