Power meter for optical efficiency measurements of laser-induced plasmas.
A power meter was constructed to measure the power being deposited in transient laser-induced plasmas (LIP). The design rejects the radiation scattered from the laser beam by the LIP and that transmitted past the LIP. The power meter is constructed from a small metal-capped flask placed in an evacuated chamber. The steady-state heat production in the flask is determined from measurements of the temperature gradient on a thermal resistance connecting the top of the flask with a heat sink. The design worked well and should be applicable to a wide variety of situations if the dimensions of the system are adjusted to compensate for power levels substantially different from those used here.
Borucki
W J
WJ
McKay
C P
CP
Rogers
R S
RS
Boac
D S
DS
Duong
N D
ND
Parris
J E
JE