High Q-factor microwave Fabry-Perot resonator with distributed Bragg reflectors.
A Fabry-Perot resonator operating at 39 GHz, with two pairs of quarter-wavelength single-crystal quartz Bragg reflectors has been realized. For the length of 98.26 mm, its Q-factor is about 560,000, which is 4.3 times better than for the same resonator without Bragg reflectors. Rigorous finite-difference frequency-domain analysis has been applied to the problem and is compared with simplified semi-analytical solutions. Good agreement between theoretical and experimental resonant frequency and Q-factors has been obtained. Thermal compensation of the resonant frequency of the Fabry-Perot has been proposed employing rods and cylinders made of metals with different thermal expansion coefficients.
Krupka
Jerzy
J
Institute of Microelectronics and Optoelectronics, Warsaw University of Technology, Poland. krupka@imio.pw.edu.pl
Cwikla
Andrzej
A
Mrozowski
Michal
M
Clarke
Robert N
RN
Tobar
Michael E
ME