Abstract:

BaLuF5 :Yb3+, Er3+ nanocrystals are synthesized with the method of high-temperature thermal decomposition. The average particle diameter of nanocrystals is 13 nm. The nanocrystals exhibit strong emission at 1530 nm. The fluorescence emission spectrum showed that the FWHM(Full Width at Half Maximum) is about 50 nm. The synthesized nanocrystals were doped into the SU-8 polymer as the core material of the optical waveguide amplifiers. The waveguide amplifier based on SU-8 doped by BaLuF5 -Yb3+,Er3+ nanocrystals was fabricated with the SiO2 upper cladding using photolithography and development process. For an 1 530 nm wavelength input signal power of 0. 1 mW and a 980 nm wavelength pump power of 280 mW, a relative optical
gain of 3. 95 dB for waveguide length of 1. 1 cm was achieved.

Key words: waveguide amplifiers, BaLuF5 :Yb3+, Er3+nanocrystals, polymer, relative gain