A distributed Bragg reflector (DBR) laser with a specially designed, heavily Er3+-doped composite fiber of length as short 1.8 cm is demonstrated. The DBR laser, pumped by 980 nm diode power up to 370 mW, generates single-frequency radiation at wavelength 1535 narrow instantaneous linewidth <100 Hz and high output 2 mW. obtained parameters pave the way toward broad range practical applicatio...

Distributed Bragg reflector (DBR) lasers are widely used in many physics experiments. However, regarding the power and frequency control of DBR lasers, obtaining complete accurate output characteristics is challenging due to need for general quantitative models. In this study, we propose validate a method based on Gaussian process regression quickly accurately establish laser wavelength model. ...

−47− Vertical-cavity surface-emitting lasers (VCSELs) are attractive for various applications because of their low cost, ease of designing two-dimensional arrays, and the low divergence angles of the output beam, provided that the issue of their relatively low output power is addressed. The maximum output power of previously reported VCSELs was just over 2 W for CW operation and just over 20 W ...

The main objective of the TravEd Research project is to develop a pedagogical model that exploits mobile technologies and electronic learning environments and that is applied especially to develop decentralised tourism education in tourist destinations with extremely mobile tourism students. Developmental work on the project will be carried out through design-based research (DBR). The approach ...