Title :
Widely tunable 1.5 μm micromechanical optical filter using AlO x/AlGaAs DBR
Author :
Wu, M.S. ; Li, G.S. ; Yuen, W. ; Chang-Hasnain, C.J.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., California Univ., Berkeley, CA, USA
fDate :
9/25/1997 12:00:00 AM
Abstract :
The authors demonstrate, for the first time, a wavelength tunable optical filter at 1.55 μm using micromechanical tuning of a Fabry-Perot resonator with an AlOx/AlGaAs distributed Bragg reflectors (DBR). The use of thermally oxidised AlAs layers, resulting an ultrawide bandwidth, dramatically increased the tuning range and efficiency of the resonator. Very efficient continuous tuning of >50 nm with only a 0.95 V tuning voltage was achieved. The tuning range, limited by our test laser, is expected to be expandable to hundreds of nm
Keywords :
Fabry-Perot resonators; III-V semiconductors; aluminium compounds; electro-optical filters; gallium arsenide; micromechanical devices; resonator filters; tuning; 0.95 V; 1.55 micron; AlO-AlGaAs; AlOx/AlGaAs distributed Bragg reflector; Fabry-Perot resonator; bandwidth; efficiency; micromechanical tuning; optical filter; thermally oxidised AlAs layer;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19971167
