Pyroelectric detection of submicrosecond laser pulses between 230 and 530 microm.
A continuously tunable far-IR Raman laser has been used to measure the responsivity and the spectral response of uncoated LiTaO(3) pyroelectric detectors between 230 and 530 microm. A striking feature of the spectral response curves is a periodic sequence of maxima and minima, with a modulation factor of >/=75%. Calculations based on the theory of an absorbing Fabry-Perot etalon indicate that these variations correspond to interference fringes produced by multiple reflections at the surfaces of the LiTaO(3) crystal.
Zhu
W S
WS
Izatt
J R
JR
Deka
B K
BK