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We propose a new approach to characterizing the depths of optical lattices,in which an atomic gas is given a finite initial momentum, which leads to highamplitude oscillations in the zeroth diffraction order which are robust tofinite-temperature effects. We present a simplified model yielding an analyticformula describing such oscillations for a gas assumed to be at zerotemperature. This model is extended to include atoms with initial momentadetuned from our chosen initial value, before analyzing the fullfinite-temperature response of the system. Finally we present a steady-statesolution to the finite-temperature system, which in principle makes possiblethe measurement of both the lattice depth, and initial temperature of theatomic gas simultaneously.

Lattice-depth measurement using continuous grating atom diffraction